CN103942011B - A kind of residual quantity fast photographic system and its application method - Google Patents
A kind of residual quantity fast photographic system and its application method Download PDFInfo
- Publication number
- CN103942011B CN103942011B CN201410077212.XA CN201410077212A CN103942011B CN 103942011 B CN103942011 B CN 103942011B CN 201410077212 A CN201410077212 A CN 201410077212A CN 103942011 B CN103942011 B CN 103942011B
- Authority
- CN
- China
- Prior art keywords
- snapshot
- block
- logical
- resource
- volume
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000007726 management method Methods 0.000 claims abstract description 38
- 238000003860 storage Methods 0.000 claims abstract description 32
- 238000013468 resource allocation Methods 0.000 claims abstract description 6
- 238000004891 communication Methods 0.000 claims abstract description 4
- 238000013507 mapping Methods 0.000 claims description 92
- 238000009826 distribution Methods 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 8
- 230000006870 function Effects 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 2
- 230000006399 behavior Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 12
- 235000019504 cigarettes Nutrition 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 235000015170 shellfish Nutrition 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Abstract
The invention discloses a kind of residual quantity fast photographic system and its application method, the system includes：Snapshot module, for safeguarding the dependence of source book and snapped volume, snapshot policy is semantic and manages snapshot metadata；Simplify configuration module, the simplify configuration module has resource management submodule, and for realizing the resource management function to snapshot, the function includes resource allocation, resource impact, resource reclaim；The snapshot module is communicated with the simplify configuration module by generic block layer interface, and the snapshot module sends request of data or resource management commands realization communication by the simplify configuration module.The system makes snapshot semantic decoupling with physical resource management, and can distribute according to need storage resource, and is redirected when can realize Copy on write, write, writes three kinds for the treatment of logics of mode everywhere, improves Snapshot Resources effective rate of utilization.
Description
Technical field
The present invention relates to areas of information technology, more particularly to the residual quantity snapping technique of field of storage.
Background technology
Storage network industries association SNIA (Storage Networking Industry Association), according to reality
Snapshot is divided into two major classes by existing technology：The full snapshot that replicates replicates snapshot with residual quantity.The residual quantity snapping technique compared with full duplication snapshot
Low with time overhead, space availability ratio is high to wait outstanding advantage, therefore residual quantity snapping technique is by industrial quarters extensive use.It is poor at present
Amount snapping technique has three kinds of realizations, i.e. Copy on write (COW, Copy On Write), and (ROW, Redirect Of is redirected when writing
Write), (WA, Write Anywhere) is write everywhere, to meet the demand of different instances.
Copy on write, principle are as shown in figure 1, create after snapshot before source volume data first time coated overwrite, first by source book
Legacy data to copy to be the reserved space of snapshot, then write new data into source book, and set up concordance list and create recording snapshot
The data block changed afterwards.Copy on write technology keeps the physical distribution of data on source book, therefore does not influence to read source volume data
Performance.But to create and write the physical copy for introducing data first after snapped volume, therefore the write performance of source book is poor, and respectively
The incremental data set at individual moment is dispersed in each snapped volume, and the performance for reading snapped volume data can be affected.
Redirected when writing, principle as shown in Fig. 2 after snapshot is created, the write operation of source book will be redirected to for
The reserved space of snapshot, and set up concordance list and come record data position, the legacy data in source book is still preserved in the original location.Weight when writing
Orientation is more excellent to the write performance of source book, and the incremental data set aggregation at each moment is stored in a snapped volume, reads snapshot
The performance for rolling up data is also better than Copy on write snapshot.It is stored in snapped volume yet with new data, the distribution of set of source data
Become dispersion, therefore the performance of reading set of source data can be affected.Additionally, source volume data collection had both been stored in source book or had been stored in fast
According to volume, when a snapshot is deleted, it is necessary to the Data Migration in snapshot is merged into source.
Write everywhere, principle, will disk as shown in figure 3, basic thought is that all physical resources are carried out into virtual management
The big physical block such as it is cut into according to fixed granularity, sets up the mapping relations that mapping table records all of logical block and physical block,
Use the mode management data block of map pointer.When creating snapshot, current map pointer is replicated a as snapshot.Work as number
When being changed according to block, writing technology does not change old data everywhere, but newly applies for the physical block of free time for data block, then
The corresponding data block map pointer in source is pointed into new physical block, and writes new data into the memory space of new physical block.Snapshot
Map pointer still points to the physical block that old data are deposited.Writing technology write performance is more excellent everywhere, and also can be by asking to adjust
Random write is become sequential write optimization random write performance by degree.When snapshot is deleted, writing technology only needs to carry out data block everywhere
Reclaimer operation, it is not necessary to carry out data and merge migration.Writing technology mixes source book with the memory space of snapped volume everywhere
It is managed collectively, source book is identical with the reading performance of snapped volume.But, writing technology can cause substantial amounts of fragmentation of data everywhere, read
Request can cause substantial amounts of union operation, have a strong impact on the performance for reading source data and snapshot data.
Their common ground is drawn by the analysis to three kinds of implementations of residual quantity snapshot, that is, safeguards snapshot layer semanteme needs
It is that new data or legacy data distribution memory space, i.e. snapshot need support resource management function simultaneously.Comprehensive foregoing three kinds of realities
Existing mode, snapping technique supports two ways resource management mode, i.e. space to be preserved mode and Dynamic Resource Allocation for Multimedia mode.Space
Reservation mode, just static resource management, the money of which are belonged to when creating snapshot for snapped volume reserves available resources by ratio
Source utilization rate is relatively low, and which is applied to Copy on write and is redirected with when writing.Dynamic Resource Allocation for Multimedia mode, in system for unified management
All available resources, according to the principle of distribution according to need, using allocation strategy when writing, the resource utilization of which is higher, but
Dynamic more new resources service condition is needed, realization is also more complicated, and which is applied to write everywhere.
Based on above-mentioned consideration, resource management mode and snapshot semanteme close coupling, thus bring in traditional residual quantity snapping technique
The deficiency of following several respects：
First, need to safeguard resource impact information in fast photographic system.The two spike-type cultivars management method of salary distribution is required for snapshot system
System supports resource impact function, and needs to change or set up corresponding mapping relations when there is new data to produce.Resource impact
Management and maintenance increased the complexity of fast photographic system.
Second, snapshot realizes that technology is coupled with resource management mode, according to the definition of storage network industries association, is copied when writing
Shellfish or to redirect when writing be resource reservation mode, does not support distribution according to need.Thus causing the resource of both implementations has
Effect utilization rate is difficult to improve.
The content of the invention
In order to solve the above problems, it is an object of the present invention to provide a kind of residual quantity snapshot based on simplify configuration system
System and its application method, make snapshot semantic decoupling with physical resource management, and can distribute according to need storage resource, and can be real
Redirected when showing Copy on write, writing, write three kinds for the treatment of logics of mode everywhere, improve Snapshot Resources effective rate of utilization.
To achieve the above object, the present invention proposes a kind of residual quantity fast photographic system, for storage resource of distributing according to need, its feature
It is that the system includes：
Snapshot module, dependence, snapshot policy semanteme, management snapshot metadata for safeguarding source book and snapped volume；
Simplify configuration module, the simplify configuration module has resource management submodule, for realizing the resource pipe to snapshot
Reason function, the function includes resource allocation, resource impact, resource reclaim；
The logical volume underlying device of the snapshot module is the logical volume of the simplify configuration module, by the simplify configuration module
Distribution according to need storage resource is realized in resource management to the logical volume, and the snapshot module passes through generic block with the simplify configuration module
Layer interface communicates, and the snapshot module sends request of data or resource management commands realization communication by the simplify configuration module.
Residual quantity fast photographic system of the invention, it is characterised in that in the snapshot module, when the snapping technique for being used is to write
Redirected when copying or writing, in the simplify configuration module, using distribution technique when writing, it is semantic that snapshot is write in support everywhere.
Residual quantity fast photographic system of the invention, it is characterised in that the simplify configuration module also includes：
Resource pool, for carrying out unified virtual management to physical memory resources, externally providing can use snapshot logical block；
Physical storage device, for storing snapshot data block；
Wherein, the resource in the logical volume that the snapshot logical block passes through the simplify configuration module management with the snapshot data block
Mapping table is corresponding；
Idling-resource table, available physical resource number of blocks and information in record Current resource pond.
The invention further relates to a kind of application method of residual quantity fast photographic system as described above, it is characterised in that the method bag
Snapshot module step and simplify configuration module step are included, wherein,
The snapshot module step, including：
User's request process step, during for the snapshot data block write request that user is received when the snapshot module, according to
The snapshot policy that the logical volume that the write request is accessed is applied, re-orientation processes when carrying out Copy on write treatment or writing, and to
Simplify configuration layer sends and remaps order or write request, when the snapshot module receives the read request of user, please according to reading
Address and snapshot logic is asked to determine logical volume where requested data block, to simplify configuration layer forwarding read request, write request or reading please
After asking return, returned to user,
Data combining step, for corresponding snapshot data block to be carried out in different snapped volumes to same snapshot logical address
Merge, and order or resource reclaim order are remapped to simplify configuration layer transmission；
The simplify configuration module step, including：
Write request step, the write request for receiving the snapshot data block that snapshot module sends when the simplify configuration module
When, whether needed to distribute resource for the snapshot data block and set up the snapshot data block with Physical Resource Block according to policy selection
Mapping relations, then to bottom physical memory module forwarding request write data into physical storage device, after writing complete successively to
Upper return,
Read request step, the read request for receiving the snapshot data block that snapshot module sends when the simplify configuration module
When, position of the data block in physical storage device is redirected requests to, physical storage device is forwarded to, set from physical store
Standby middle reading data return to user,
Step is remapped, for receiving remapping for the snapshot data block that snapshot module sends when the simplify configuration module
During order, remapping operation is carried out to the snapshot data block,
Resource reclaim step is right during for the resource reclaim order that snapshot data block is received when the simplify configuration module
The snapshot data block carries out physical resource recovery.
The application method of residual quantity fast photographic system of the invention, it is characterised in that the Copy on write treatment includes following step
Suddenly：
Step 11, source book receives user to snapshot logical block write request, during inquiry depends on the recent snapshot of the source book to roll up
Metadata, whether judge that this is write according to this is writing first to the snapshot logical block, if in the metadata of the snapped volume identify
The snapshot logical block, then to write first, performs step 12 without effective snapshot data block, otherwise, performs step 13,
Step 12, the snapshot source book sends to the logical volume that underlying device is the simplify configuration system and remaps order, will
The corresponding legacy version snapshot data block of the snapshot logical block is remapped to snapped volume logical space from source book logical space, and updating should
Snapped volume metadata, and notify that the mathematical logic unit of the source book has completed to patrol snapshot logical block correspondence snapshot data block
Collect copy,
The snapshot data write request of user is transmitted to underlying device, i.e. simplify configuration logical volume by step 13, the source book,
The snapshot write request returns to rear line layer and returns；
Re-orientation processes comprise the following steps when this is write：
Step 21, source book receives user to snapshot logical block write request, and inquiry depends on the recent snapshot of the source book to roll up, will
Write request is redirected to the snapped volume logical space,
Step 22, the snapped volume receives the snapshot logical block write request of user, and is transmitted to underlying device,
Step 23, the write request updates snapped volume metadata after returning, and returns to client layer.
The application method of residual quantity fast photographic system of the invention, it is characterised in that the data combining step is specially：If will be
The corresponding snapshot data blocks of snapshot logical block B that there is effective snapshot data block in snapshot logical volume LV2 are merged into snapshot logic
Volume LV1, wherein LV1, LV2 be same source book in snapped volume not in the same time, or source book and snapped volume,
If the new data set in snapshot logical volume LV2 of data set in snapshot logical volume LV1, is walked as follows
Suddenly：
Step 41, for the snapshot logical block B in snapshot logical volume LV2, checks the unit in snapshot logical volume LV1
Whether data, judge there is the redaction snapshot data block of snapshot logical block in the volume, and step 42 is performed if having, and otherwise perform step
Rapid 43,
Step 42, the snapshot module gives the resource of the snapshot logical block to return to snapshot logical volume LV2 Lower level logicals curly hair
Order is received, after the order is successfully returned, the metadata of snapshot logical volume LV2 is updated, is that nothing has by the snapshot logical block identification
Effect snapshot data block, then complete the versions merging to the corresponding snapshot data block of snapshot logical block,
Step 43, the snapshot module gives remapping for the snapshot logical block to snapshot logical volume LV2 Lower level logicals curly hair
Order, the snapshot is remapped to by the corresponding snapshot data block of snapshot logical block from snapshot logical volume LV2 Lower level logicals volume
Logical volume LV1 Lower level logicals are rolled up, wherein, this remaps order including following parameters, the logical block number (LBN) of the snapshot logical block, and source is reflected
Jet device, target mapped device,
Step 44, this is remapped after order successfully returns, and the snapshot logical volume LV1 and the snapshot logical volume are updated respectively
The metadata of LV2, is designated metadata in the snapshot logical volume LV1 snapshot logical block and there is effective snapshot data block, will
The metadata of snapshot logical volume LV2 is designated the snapshot logical block in the absence of effective snapshot data block, then complete to the snapshot
The versions merging of the corresponding snapshot data block of logical block；
If the data set in snapshot logical volume LV1 is walked as follows older than the data set in snapshot logical volume LV2
Suddenly：
Step 51, for the snapshot logical block B in snapshot logical volume LV2, sends this fast to the simplify configuration system
Order is remapped according to logical block, the corresponding snapshot data blocks of snapshot logical block B are patrolled from the bottom of snapshot logical volume LV2
The Lower level logical volume that volume is remapped to snapshot logical volume LV1 is collected, this remaps order includes following parameters, the snapshot logical block
Logical block number (LBN), source mapped device, target mapped device,
Step 52, this is remapped after order successfully returns, and merges the snapshot logical block in the snapshot logical volume LV1 and this is fast
According to the metadata in logical volume LV2, and the metadata of snapshot logical volume LV1 is updated accordingly, and update snapshot logical volume LV2
Metadata, be that without effective snapshot data block, the now merging to the snapshot data block is completed by the snapshot logical block identification,
Wherein, this remaps source mapped device and target the mapped device respectively snapshot logical volume LV2 in command parameter
With the underlying device of LV1, and when in snapshot logical volume LV2 the corresponding effective snapshot data block of all snapshot logical blocks merge
Data union operation to snapshot logical volume LV1, the snapshot logical volume LV2 and snapshot logical volume LV1 is completed.
The application method of residual quantity fast photographic system of the invention, it is characterised in that described to write in simplify configuration module step
Request step specifically,
Step 61, the logical volume of the simplify configuration module receives upper strata write request, in the logical volume resource mapping table
The mapping of recent snapshot logical block is searched, if the snapshot logical block does not associate corresponding Physical Resource Block in map information,
It is then writing first to the snapshot logical block, performs step 62；Otherwise perform step 64；
Step 62, for the snapshot logical block distributes resource from the resource pool of the resource management module, in renewal resource pool
Idling-resource record；
Step 63, sets up the mapping relations of the snapshot logical block and Physical Resource Block, in the mapping of the snapshot logical block
The middle information for adding the Physical Resource Block, the information includes the physical storage device where the Physical Resource Block and address；
Step 64, physical memory module is transmitted to by write request；
Step 65, after the physical memory module writes return, successively returns up.
The application method of residual quantity fast photographic system of the invention, it is characterised in that in simplify configuration module step, the reading
Request step specifically,
Step 71, the logical volume of the simplify configuration module receives upper strata read request, in the resource mapping table of the logical volume
It is middle to search the corresponding resource impact of snapshot logical block that the read request is accessed, obtain snapshot corresponding with the snapshot logical block
Address of the data block in physical storage device；
Step 72, storage location of the snapshot data block in physical storage device is redirected to by read request, is forwarded to
Physical memory module；
Step 73, after underlying device is returned, successively returns up.
The application method of residual quantity fast photographic system of the invention, it is characterised in that in simplify configuration module step, it is described heavy
Mapping step specifically,
Step 81, the simplify configuration module is received and remaps order, parses remapping operation parameter, that is, obtain the replay
Logical block number (LBN) needed for penetrating operation, source mapping logic volume, target mapping logic volume, if mapping logic volume in source is LV3, target mapping
Logical volume is LV4, and snapshot logical block to be remapped is B；
Step 82, the corresponding mappings of snapshot logical block B are searched in the resource mapping table that the source mapping logic rolls up LV3
, if snapshot logical block B is associated with Physical Resource Block in the mapping, its corresponding Physical Resource Block P is obtained, perform step
83, otherwise perform step 87；
Step 83, the target mapping logic volume LV4 resource mapping table in search to should snapshot logical block B mapping
, if finding corresponding mapping item, its corresponding Physical Resource Block Q is obtained, and step 84 is performed, otherwise perform step 85；
Step 84, cancellation snapshot logical block is associated with Physical Resource Block Q's, and discharging should during the target mapping logic rolls up LV4
The Physical Resource Block Q that snapshot logical block B takes, and update idle resource record in shared resource pond；
Step 85, by the snapshot logical block B and Physical Resource Block in the resource mapping table of target mapping logic volume LV4
P is associated, and changes the corresponding mapping items of snapshot logical block B, writes the Physical Resource Block P information of snapshot logical block association,
The information includes physical equipment where Physical Resource Block, and the address in the physical equipment；
Step 86, the snapshot logical block B and the physical resource are cancelled in the resource mapping table that the source mapping logic rolls up LV3
The association of block P, remapping operation is completed；
Step 87, returns to upper strata.
The application method of residual quantity fast photographic system of the invention, it is characterised in that in simplify configuration module step, the money
Source recycling step specifically,
Step 91, the simplify configuration module receives resource reclaim order, and analytic parameter obtains logical volume, logical block
Information；
Step 92, searches the mapping of counterlogic block, if this reflects in the parameter specifies the resource mapping table of logical volume
Penetrate in item and be associated with corresponding Physical Resource Block, then perform step 93, otherwise perform step 95；
Step 93, cancels the logical block and Physical Resource Block mapping relations, and discharge the physical resource being mapped；
Step 94, updates resource pool idling-resource record；
Step 95, returns to upper strata.
The positive effect of the present invention is：
First, the combination of simplify configuration system and snapping technique, on the one hand, divide physical resource management from fast photographic system
From snapshot layer only needs to safeguard that snapshot is semantic, the resource management without carrying out complexity；On the other hand, global resource is realized to move
State is configured, and snapshot implementation and resource management mode are decoupled, i.e., Copy on write, redirect semanteme when writing and need not pre-allocate soon
According to space.
Second, simplify configuration system is realized writing mechanism everywhere, and semanteme is redirected when snapshot layer is safeguarded Copy on write and write, real
Redirected when having showed Copy on write, having write nested with writing technology everywhere.
Brief description of the drawings
Fig. 1 is the principle schematic of the Copy on write in residual quantity snapshot implementation；
Fig. 2 is the principle schematic redirected when writing in residual quantity snapshot implementation；
Fig. 3 is the principle schematic write everywhere in residual quantity snapshot implementation；
Fig. 4 is the logical construction schematic diagram of residual quantity fast photographic system of the invention；
Fig. 5 is the illustrative view of functional configuration of residual quantity fast photographic system of the invention；
Fig. 6 is the semantic nesting schematic diagram of snapshot of residual quantity fast photographic system of the invention；
Fig. 7 is the flow chart of the Copy on write process step of residual quantity fast photographic system of the invention.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with accompanying drawing to of the invention
Residual quantity fast photographic system and its application method are further elaborated.It should be appreciated that specific embodiment described herein
Only it is used to explain the present invention, is not intended to limit the present invention.
The present invention provides a user with source book and the logic of class of snapped volume two volume, and wherein snapped volume depends on source book.Snapshot module
Logical volume underlying device be logical volume derived from simplify configuration module.Synthesis Copy on write of the invention, redirect when writing, everywhere
Write three kinds for the treatment of logics of implementation, the logic function to snapshot has carried out abstract division, its hierarchical structure as shown in Fig. 2
Functional structure as shown in figure 3, realize that resource is configured on demand to the management that this module logic is rolled up by simplify configuration system, snapshot mould
Block need to only safeguard that snapshot is semantic, realize Copy on write or redirect logic when writing.
Snapshot module is communicated with simplify configuration module by interface module, and snapshot module please by being sent out to simplify configuration module
Ask or resource management commands realize communication, be related to user's request to process and data two processes of merging.General steps are according to being
System structure is divided into snapshot module step and simplify configuration module step.To be below right with snapshot module snapshot data block
As describing the step.
First, snapshot module step
The step specifically includes user's write request process step, user's read request process step, data combining step, below
These steps are further described successively.
1st, user's write request process step
When user's write request is received, if carrying out Copy on write, the following steps are performed：
Step 11, source book receives user to snapshot logical block write request, during inquiry depends on the recent snapshot of the source book to roll up
Metadata, whether judge that this is write accordingly is writing first to the snapshot data block, if in the metadata of the snapped volume identify
The snapshot logical block then to write first, then performs step 12 without effective snapshot data block, otherwise, performs step 13,
Step 12, the snapshot source book sends to the logical volume that underlying device is the simplify configuration system and remaps order, will
Old data block is remapped to snapped volume logical space from source book logical space, updates the snapped volume metadata, and notify the source book
The mathematical logic unit logical copy that has completed to the snapshot data block,
The snapshot data write request of user is transmitted to underlying device by step 13, the source book, after write request is returned, is returned
Client layer；
If entering re-orientation processes during row write, the following steps are performed：
Step 21, source book receives user to snapshot logical block write request, and inquiry depends on the recent snapshot of the source book to roll up, should
Write request is redirected to the snapped volume logical space,
Step 22, the snapped volume receives the snapshot logical block write request of user, and is transmitted to underlying device,
Step 23, the write request updates snapped volume metadata after returning, and returns to client layer.
2nd, user's read request process step
User's read request is identical with the treatment logic that SNIA is defined, and is divided into reading snapshot source book and reads snapped volume.
Step 31, user reads snapshot source book, comprises the following steps that：
Step 311, if Copy on write mode, then perform following steps：
A () read request is redirected the Lower level logical volume of the snapshot source book, and be transmitted to the bottom simplify configuration mould of source book
Block logical volume；
B () simplify configuration module logic cigarette receives read request and performs reads flow, and the data that will be read return to upper strata；
C () snapshot source book receives the return of Lower level logical volume, directly returned to user.
Step 312, if redirecting mode when writing, then performs following steps：
A () the snapshot source book receives user's read request, lookup depends on the recent snapshot of the snapshot source book to roll up；
B () checks the corresponding metadata of logical block asked in recent snapshot volume, it is determined whether there is the logical block
Valid data, if execution step (c) without if；Otherwise perform step (d)；
C () obtains forerunner's snapshot logical volume of recent snapshot volume, and rolled up forerunner's snapshot logical volume as recent snapshot, holds
Row (b)；
D () read request is redirected to the current snapped volume, snapped volume receives the essence that read request is directly forwarded to its bottom
The logical volume of simple configuration module；
E () simplify configuration module logic cigarette receives read request after, perform this layer and read flow, forward requests to bottom thing
Reason storage device, and the data of reading are successively returned up.
Step 32, user reads snapped volume, then perform following steps：
Step 321, if Copy on write mode, then perform following steps：
A () recent snapshot cigarette receives user's read request, the data whether metadata of this volume has asked are checked, if not having
There is then execution (b)；Otherwise perform (c)；
B () obtains forerunner's logical volume of recent snapshot volume, and perform (a) using the logical volume as recent snapshot volume；
C () recent snapshot volume forwards a request to the simplify configuration module logic volume of bottom；
D () Lower level logical cigarette receives read request and performs this layer of reading flow；
E data that () will read successively are returned up.
Step 322, if redirecting mode when writing, then performs following steps：
A () snapped volume receives read request, obtain forerunner's logical volume of the snapped volume, and read request is redirected into this snapshot
Forerunner's logical volume of volume；
B () forerunner's logical volume receives read request, check the metadata in this volume, judges whether the number asked
According to, if not existing asked data in the logical volume, perform (c), otherwise perform (d)；
C forerunner's logical volume as current request logical volume is obtained forerunner's logical volume of the current request logical volume by (),
Read request is redirected to forerunner's logical volume, is performed (b);
D () forwards a request to the logical volume of the simplify configuration module of bottom；
E the logical volume of () simplify configuration module receives read request, perform this layer and read flow；
F data that () will read successively are returned up.
3rd, data combining step
When needing for the snapshot data in two snapped volumes to carry out versions merging, following steps are carried out,
Data merge does versions merging with the data in LV1 volumes one by one to the valid data in LV2 volumes.Patrolled with snapshot below
It is illustrated as a example by the valid data versions merging operation for collecting block B.
If corresponding effective snapshot data block is merged into logical volume LV1 in logical volume LV2 by snapshot logical block B, wherein
LV1, LV2 be same source book in snapped volume not in the same time, if data set in logical volume LV1 is new in logical volume LV2
Data set, then carry out following steps：
Step 41, for the snapshot logical block B that there is effective snapshot data block in logical volume LV2, checks the logic
Whether metadata in volume LV1, judges there is the redaction snapshot data block of the snapshot logical block in logical volume LV1, if having
Step 42 is performed, step 43 is otherwise performed,
Step 42, logical volume LV2 is ordered to the resource reclaim that the simplify configuration logical volume of bottom sends snapshot logical block B
Order, after the order is successfully returned, updates the metadata of logical volume LV2, is without effective snapshot number by the snapshot logical block identification
According to block, then the versions merging to the corresponding snapshot data blocks of snapshot logical block B is completed,
Step 43, logical volume LV2 remaps life to what the simplify configuration logical volume of bottom sent snapshot logical block B
Order, logical volume LV1 bottoms are remapped to by the corresponding snapshot data block of snapshot logical block from logical volume LV2 Lower level logicals volume
Layer logical volume, wherein, this remaps order includes following parameters, the logical block number (LBN) of the snapshot logical block, source mapping logic volume, mesh
Mark mapping logic volume,
Step 44, this is remapped after order successfully returns, and first number of logical volume LV1 and logical volume LV2 is updated respectively
According to metadata in logical volume LV1 being designated into the snapshot logical block and there is effective snapshot data block, by logical volume LV2's
Metadata is designated the snapshot logical block in the absence of effective snapshot data block, then complete snapshot corresponding to snapshot logical block B
The versions merging of data block；
If the data set in logical volume LV1 carries out following steps older than the data set in logical volume LV2：
Step 51, for the snapshot logical block B in logical volume LV2, sends the snapshot and patrols to the simplify configuration system
That collects block B remaps order, and the corresponding snapshot data blocks of snapshot logical block B are rolled up into replay from logical volume LV2 Lower level logicals
Logical volume LV1 Lower level logicals volume is mapped to, this remaps order includes following parameters, the logical block number (LBN) of the snapshot logical block, source
Mapping logic is rolled up, target mapping logic volume,
Step 52, this is remapped after order successfully returns, and merges metadata of the snapshot logical block B in LV1 and LV2,
And the metadata of the LV1 is updated accordingly, and the metadata of LV2 is updated, it is without effective snapshot data by the snapshot logical block identification
Block, now the versions merging to the snapshot data block of snapshot logical block B complete,
Wherein, the source mapping logic volume and target mapping logic volume remapped in command parameter is respectively logical volume LV2
Lower level logical with LV1 is rolled up, when the corresponding effective snapshot data block of all snapshot logical blocks is merged into this in logical volume LV2
Logical volume LV1, logical volume LV2 are completed with the data union operation of logical volume LV1.
2nd, simplify configuration module step
In simplify configuration module step, including write request step, read request step, remap step, resource reclaim step
It is rapid etc..
1st, write request step
The step is specially：
Step 61, the logical volume of the simplify configuration module receives upper strata write request, is looked into this resource mapping table rolled up
The map information of recent snapshot logical block is looked for, if not finding the map information that the snapshot logical block is associated with Physical Resource Block,
It is then writing first to the snapshot logical block, performs step 62；Otherwise perform step 64；
Step 62, for the snapshot logical block distributes resource from the resource pool of the resource management module, in renewal resource pool
Idling-resource record；
Step 63, sets up the mapping relations of the snapshot logical block and Physical Resource Block, in the resource mapping table of the logical volume
In increase the information of the Physical Resource Block in the corresponding mapping of snapshot logical block, the information is included where the Physical Resource Block
Physical storage device and address；
Step 64, physical memory module is transmitted to by write request；
Step 65, after the physical memory module writes return, returns to upper strata.
2nd, read request step
The step is specially：
Step 71, the logical volume of the simplify configuration module receives upper strata read request, is searched in resource mapping table corresponding
Resource impact, obtain the physical equipment and physical address for storing data block needed for the read request；
Step 72, storage location of the snapshot data block in physical storage device is redirected to by read request, is forwarded to
Physical memory module；
Step 73, after underlying device is returned to this module, successively returns up.
3rd, step is remapped
The source book of snapshot layer or the semanteme of snapped volume are transparent to simplify configuration module, and simplify configuration module is not differentiated between fast simultaneously
The source book or snapped volume of lighting module, only distinguish the source device and target device of remapping operation, i.e. source logical volume is patrolled with target
Collect volume.The step of below with a snapshot logical block as object factory remapping operation.
The step is specially：
Step 81, the simplify configuration module is received and remaps order, parses remapping operation parameter, i.e. source mapping logic
Volume, logical block number (LBN), target mapping logic volume information, it is assumed that mapping logic volume in source is LV3, and target mapping logic volume is LV4, treats weight
Mapping snapshot logical block is B；
Step 82, the corresponding mappings of snapshot logical block B are searched in the resource mapping table that the source mapping logic rolls up LV3
, if snapshot logical block B is associated with Physical Resource Block in the mapping, its corresponding Physical Resource Block P is obtained, perform step
83, otherwise perform step 87；
Step 83, the target mapping logic volume LV4 resource mapping table in search to should snapshot logical block B mapping
, if being associated with corresponding Physical Resource Block in the mapping of snapshot logical block B, Physical Resource Block Q is obtained, and perform step
Rapid 84, otherwise perform step 85；
Step 84, cancellation snapshot logical block is associated with Physical Resource Block Q's, discharges the snapshot in target logic volume LV4
The Physical Resource Block Q that logical block B takes, and update idle resource record in shared resource pond；
Step 85, closes the snapshot logical block B and Physical Resource Block P in the resource mapping table of target logic volume LV4
Connection, changes the mapping of snapshot logical block B, writes the information of Physical Resource Block P, and the information includes the Physical Resource Block institute
Physical storage device and physical address；
Step 86, the snapshot logical block B and the physical resource are cancelled in the resource mapping table that the source mapping logic rolls up LV3
The association of block P, remapping operation is completed；
Step 87, returns to upper strata.
4th, resource reclaim step
The step is specially：
Step 91, the simplify configuration module receives resource reclaim order, and analytic parameter obtains logical volume, logical block
Information；
Step 92, searches the mapping of counterlogic block, if finding phase in parameter specifies the resource mapping table of logical volume
The mapping item answered then performs step 93, otherwise performs step 95；
Step 93, cancels logical block and Physical Resource Block mapping relations, and discharge the physical resource being mapped；
Step 94, updates resource pool idling-resource record；
Step 95, returns to upper strata.
The present invention has advantages below：
First, snapshot is semantic decoupling with physical resource management, and resource management is transparent to snapshot layer.Simplify configuration system is made
For basic-level support technology realizes resource management function, its Core Feature includes resource allocation, resource impact, resource reclaim etc.；Hurry up
Include safeguarding that snapshot is semantic according to layer Core Feature, that is, safeguard dependence, the management snapshot layer metadata between snapped volume（Mark number
Whether there is valid data in snapped volume logical space according to block）, realize Copy on write or redirect logic when writing.
Second, simplify configuration system writes semanteme everywhere according to distribution according to need principle, allocation strategy when execution is write, realization, and
And random write can be optimized for sequential write, improve write performance.
3rd, resource management resets when being separated with snapshot semanteme and both solve Copy on write, write and is distributed according to need with resource
With reference to problem, while when realizing Copy on write, writing redirect and write the nested of mechanism everywhere, as shown in Figure 4.
Claims (10)
1. a kind of residual quantity fast photographic system, for storage resource of distributing according to need, it is characterised in that the system includes：
Snapshot module, dependence, snapshot policy semanteme, management snapshot metadata for safeguarding source book and snapped volume；
Simplify configuration module, the simplify configuration module has resource management submodule, for realizing the resource management work(to snapshot
Can, the function includes resource allocation, resource impact, resource reclaim；
The logical volume underlying device of the snapshot module is the logical volume of the simplify configuration module, by the simplify configuration module to this
Distribution according to need storage resource is realized in the management of logical volume, and the snapshot module is logical by generic block layer interface with the simplify configuration module
Letter, the snapshot module sends request of data or resource management commands realization communication by the simplify configuration module；
Wherein the snapshot module, during for the snapshot data block write request that user is received when the snapshot module, writes according to this and asks
The snapshot policy for asking accessed logical volume to be applied, re-orientation processes when carrying out Copy on write treatment or writing, and simplified to this
Configuration module sends and remaps order or write request, when the snapshot module receives the read request of user, according to read request ground
Location and snapshot logic determine logical volume where requested data block, to simplify configuration module forwards read request, write request or read request
After return, returned to user；It is additionally operable to same snapshot logical address that corresponding snapshot data block is carried out in different snapped volumes
Merge, and order or resource reclaim order are remapped to simplify configuration module transmission.
2. residual quantity fast photographic system as claimed in claim 1, it is characterised in that in the snapshot module, the snapshot skill for being used
Art is Copy on write or redirects when writing, and in the simplify configuration module, using distribution technique when writing, snapshot language is write in support everywhere
Justice.
3. residual quantity fast photographic system as claimed in claim 1, it is characterised in that the simplify configuration module also includes：
Resource pool, for carrying out unified virtual management to physical memory resources, externally providing can use snapshot logical block；
Physical storage device, for storing snapshot data block；
Wherein, the resource impact in the logical volume that the snapshot logical block passes through the simplify configuration module management with the snapshot data block
Table is corresponding；
Idling-resource table, available physical resource number of blocks and information in record Current resource pond.
4. a kind of application method of residual quantity fast photographic system to described in claim 1-3 any one, it is characterised in that the method
Including snapshot module step and simplify configuration module step, wherein,
The snapshot module step, including：
User's request process step, during for the snapshot data block write request that user is received when the snapshot module, writes according to this
The snapshot policy that the accessed logical volume of request is applied, re-orientation processes when carrying out Copy on write treatment or writing, and to the essence
Simple configuration module sends and remaps order or write request, when the snapshot module receives the read request of user, according to read request
Address and snapshot logic determine logical volume where requested data block, and to simplify configuration module forwards read request, write request or reading please
After asking return, returned to user；
Data combining step, for corresponding snapshot data block to be closed in different snapped volumes to same snapshot logical address
And, and remap order or resource reclaim order to simplify configuration module transmission；
The simplify configuration module step, including：
Write request step, for when the simplify configuration module receives the write request of the snapshot data block that snapshot module sends,
Whether needed to distribute resource for the snapshot data block and set up reflecting for the snapshot data block and Physical Resource Block according to policy selection
Relation is penetrated, then physical storage device is write data into the forwarding request of bottom physical memory module, it is successively upward after writing complete
Return,
Read request step, for when the simplify configuration module receives the read request of the snapshot data block that snapshot module sends,
Position of the data block in physical storage device is redirected requests to, physical storage device is forwarded to, from physical storage device
Middle reading data return to user,
Step is remapped, order is remapped for receive the snapshot data block that snapshot module sends when the simplify configuration module
When, remapping operation is carried out to the snapshot data block,
Resource reclaim step, it is fast to this during for the resource reclaim order that snapshot data block is received when the simplify configuration module
Physical resource recovery is carried out according to data block.
5. the application method of residual quantity fast photographic system as claimed in claim 4, it is characterised in that the Copy on write treatment includes
The following steps：
Step 11, source book receives user to snapshot logical block write request, and inquiry depends on the unit in the recent snapshot volume of the source book
Data, whether be first writing to the snapshot logical block, if it is fast that this is identified in the metadata of the snapped volume if judging that this is write according to this
According to logical block without effective snapshot data block, then to write first, step 12 is performed, otherwise, performs step 13,
Step 12, the source book is sent to the logical volume that underlying device is the simplify configuration module and remaps order, and the snapshot is patrolled
Collect the corresponding legacy version snapshot data block of block and be remapped to snapped volume logical space from source book logical space, update snapped volume unit
Data, and notify that the mathematical logic unit of the source book has completed the logical copy to snapshot logical block correspondence snapshot data block,
The snapshot data write request of user is transmitted to underlying device, i.e. simplify configuration logical volume by step 13, the source book, and this is fast
Rear line layer is returned to according to data write request to return；
Re-orientation processes comprise the following steps when this is write：
Step 21, source book receives user to snapshot logical block write request, and inquiry depends on the recent snapshot of the source book to roll up, and will write please
Ask and be redirected to the snapped volume logical space,
Step 22, the snapped volume receives the snapshot logical block write request of user, and is transmitted to underlying device,
Step 23, the write request updates snapped volume metadata after returning, and returns to client layer.
6. the application method of residual quantity fast photographic system as claimed in claim 4, it is characterised in that the data combining step is specific
For：
If by the corresponding snapshot data merged blocks of snapshot logical block B that there is effective snapshot data block in snapshot logical volume LV2
To snapshot logical volume LV1, wherein LV1, LV2 be same source book in snapped volume not in the same time, or source book and snapped volume,
If the new data set in snapshot logical volume LV2 of data set in snapshot logical volume LV1, carries out following steps：
Step 41, for the snapshot logical block B in snapshot logical volume LV2, checks the first number in snapshot logical volume LV1
According to, judge whether there is the redaction snapshot data block of snapshot logical block in the volume, step 42 is performed if having, otherwise perform step
43,
Step 42, the snapshot module gives the resource reclaim of the snapshot logical block to order to snapshot logical volume LV2 Lower level logicals curly hair
Order, after the order is successfully returned, updates the metadata of snapshot logical volume LV2, is without effectively fast by the snapshot logical block identification
According to data block, then the versions merging to the corresponding snapshot data block of snapshot logical block is completed,
Step 43, the snapshot module remaps order to what snapshot logical volume LV2 Lower level logicals curly hair gave the snapshot logical block,
The corresponding snapshot data block of snapshot logical block is remapped to the snapshot logical volume from snapshot logical volume LV2 Lower level logicals volume
LV1 Lower level logicals are rolled up, wherein, this remaps order includes following parameters, and the logical block number (LBN) of the snapshot logical block, source mapping sets
It is standby, target mapped device,
Step 44, this is remapped after order successfully returns, and updates the snapshot logical volume LV1 and snapshot logical volume LV2's respectively
Metadata, is designated metadata in the snapshot logical volume LV1 snapshot logical block and there is effective snapshot data block, by the snapshot
The metadata of logical volume LV2 is designated the snapshot logical block in the absence of effective snapshot data block, then complete to the snapshot logical block
The versions merging of corresponding snapshot data block；
If the data set in snapshot logical volume LV1 carries out following steps older than the data set in snapshot logical volume LV2：
Step 51, for the snapshot logical block B in snapshot logical volume LV2, sends the snapshot and patrols to the simplify configuration module
That collects block remaps order, and the corresponding snapshot data blocks of snapshot logical block B are rolled up from the Lower level logical of snapshot logical volume LV2
The Lower level logical volume of snapshot logical volume LV1 is remapped to, this remaps order including following parameters, the snapshot logical block is patrolled
Volume block number, source mapped device, target mapped device,
Step 52, this remaps after order successfully returns, merges the snapshot logical block and patrolled in the snapshot logical volume LV1 and the snapshot
The metadata in volume LV2 is collected, and updates the metadata of snapshot logical volume LV1 accordingly, and update the unit of snapshot logical volume LV2
Data, are that, without effective snapshot data block, the now merging to the snapshot data block is completed by the snapshot logical block identification,
Wherein, this remaps source mapped device and target the mapped device respectively snapshot logical volume LV2 and LV1 in command parameter
Underlying device, and when in snapshot logical volume LV2 the corresponding effective snapshot data block of all snapshot logical blocks be merged into this
Snapshot logical volume LV1, the snapshot logical volume LV2 are completed with the data union operation of snapshot logical volume LV1.
7. the application method of residual quantity fast photographic system as claimed in claim 4, it is characterised in that in simplify configuration module step
In, the write request step specifically,
Step 61, the logical volume of the simplify configuration module receives upper strata write request, is searched in the logical volume resource mapping table
The mapping of recent snapshot logical block, if the snapshot logical block does not associate corresponding Physical Resource Block in map information, be
To writing first for the snapshot logical block, step 62 is performed；Otherwise perform step 64；
Step 62, for the snapshot logical block distributes resource from the resource pool of the resource management submodule, in renewal resource pool
Idling-resource is recorded；
Step 63, sets up the mapping relations of the snapshot logical block and Physical Resource Block, in the mapping Xiang Zhongtian of the snapshot logical block
Plus the information of the Physical Resource Block, the information include the Physical Resource Block where physical storage device and address；
Step 64, physical memory module is transmitted to by write request；
Step 65, after the physical memory module writes return, successively returns up.
8. the application method of residual quantity fast photographic system as claimed in claim 4, it is characterised in that in simplify configuration module step
In, the read request step specifically,
Step 71, the logical volume of the simplify configuration module receives upper strata read request, is looked into the resource mapping table of the logical volume
Look for the read request to access the corresponding resource impact of snapshot logical block, obtain snapshot data block corresponding with the snapshot logical block
The address in physical storage device；
Step 72, storage location of the snapshot data block in physical storage device is redirected to by read request, is forwarded to physics
Memory module；
Step 73, after underlying device is returned to this module, successively returns up.
9. the application method of residual quantity fast photographic system as claimed in claim 4, it is characterised in that in simplify configuration module step
In, it is described remap step specifically,
Step 81, the simplify configuration module is received and remaps order, parses remapping operation parameter, that is, obtain this and remap behaviour
Logical block number (LBN) needed for making, source mapping logic volume, target mapping logic volume, if mapping logic volume in source is LV3, target mapping logic
It is LV4 to roll up, and snapshot logical block to be remapped is B；
Step 82, the corresponding mapping items of snapshot logical block B are searched in the resource mapping table that the source mapping logic rolls up LV3, if
Snapshot logical block B is associated with Physical Resource Block in the mapping, obtains its corresponding Physical Resource Block P, performs step 83, no
Then perform step 87；
Step 83, searched in the resource mapping table of target mapping logic volume LV4 to should snapshot logical block B mapping,
If snapshot logical block B is associated with Physical Resource Block in the mapping, Physical Resource Block Q is obtained, and perform step 84, otherwise
Perform step 85；
Step 84, cancellation snapshot logical block is associated with Physical Resource Block Q's, discharges the snapshot in target mapping logic volume LV4
The Physical Resource Block Q that logical block B takes, and update idle resource record in shared resource pond；
Step 85, closes the snapshot logical block B and Physical Resource Block P in the resource mapping table of target mapping logic volume LV4
Connection, changes the corresponding mapping items of snapshot logical block B, writes the Physical Resource Block P information of snapshot logical block association, should
Information at least includes physical equipment where Physical Resource Block, and the address in the physical equipment；
Step 86, the snapshot logical block B and Physical Resource Block P is cancelled in the resource mapping table that the source mapping logic rolls up LV3
Association, remapping operation complete；
Step 87, returns to upper strata.
10. the application method of residual quantity fast photographic system as claimed in claim 4, it is characterised in that in simplify configuration module step
In, the resource reclaim step specifically,
Step 91, the simplify configuration module receives resource reclaim order, and analytic parameter obtains logical volume, logical block information；
Step 92, searches the mapping of counterlogic block in the parameter specifies the resource mapping table of logical volume, if the mapping
In be associated with corresponding Physical Resource Block, then perform step 93, otherwise perform step 95；
Step 93, cancels the logical block and Physical Resource Block mapping relations, and discharge the physical resource being mapped；
Step 94, updates resource pool idling-resource record；
Step 95, returns to upper strata.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410077212.XA CN103942011B (en) | 2014-03-04 | 2014-03-04 | A kind of residual quantity fast photographic system and its application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410077212.XA CN103942011B (en) | 2014-03-04 | 2014-03-04 | A kind of residual quantity fast photographic system and its application method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103942011A CN103942011A (en) | 2014-07-23 |
| CN103942011B true CN103942011B (en) | 2017-06-09 |
Family
ID=51189692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410077212.XA Expired - Fee Related CN103942011B (en) | 2014-03-04 | 2014-03-04 | A kind of residual quantity fast photographic system and its application method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103942011B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104407935B (en) * | 2014-11-07 | 2018-05-18 | 华为数字技术（成都）有限公司 | Snapshot rollback method and storage device |
| CN105808449B (en) * | 2014-12-31 | 2018-11-27 | 中国电信股份有限公司 | A kind of virtual memory image method for edition management and system for virtual machine |
| CN105988895B (en) * | 2015-02-10 | 2020-11-03 | 中兴通讯股份有限公司 | Snapshot processing method and device |
| CN105278878B (en) * | 2015-09-30 | 2018-09-21 | 成都华为技术有限公司 | A kind of disk space distribution method and device |
| CN107357928B (en) * | 2017-07-26 | 2020-09-18 | 苏州浪潮智能科技有限公司 | Method and system for realizing snapshot storage |
| CN107491363A (en) * | 2017-08-24 | 2017-12-19 | 郑州云海信息技术有限公司 | A kind of Snapshot Method and device of the storage volume based on linux kernel |
| CN109598156B (en) * | 2018-11-19 | 2023-04-11 | 杭州信核数据科技股份有限公司 | Method for redirecting engine snapshot stream during writing |
| CN109739688B (en) * | 2018-12-18 | 2021-01-26 | 杭州宏杉科技股份有限公司 | Snapshot resource space management method and device and electronic equipment |
| CN110502187B (en) * | 2019-07-09 | 2020-12-04 | 华为技术有限公司 | Snapshot rollback method and device |
| CN110941511B (en) * | 2019-11-21 | 2023-03-21 | 深信服科技股份有限公司 | Snapshot merging method, device, equipment and storage medium |
| CN113157199A (en) * | 2020-01-22 | 2021-07-23 | 阿里巴巴集团控股有限公司 | Snapshot occupation space calculation method and device, electronic equipment and storage medium |
| CN111552437B (en) * | 2020-04-22 | 2024-03-15 | 上海天玑科技股份有限公司 | Snapshot method and snapshot device applied to distributed storage system |
| CN114816250B (en) * | 2022-04-15 | 2022-10-25 | 北京志凌海纳科技有限公司 | Continuous data protection method under distributed storage system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102163177A (en) * | 2010-02-24 | 2011-08-24 | 株式会社日立制作所 | Reduction of i/o latency for writable copy-on-write snapshot function |
| CN102915275A (en) * | 2012-09-13 | 2013-02-06 | 曙光信息产业(北京)有限公司 | Thin provisioning system |
| CN103080894A (en) * | 2010-12-28 | 2013-05-01 | 株式会社日立制作所 | Storage system, management method of the storage system, and program |
| CN103561098A (en) * | 2013-11-05 | 2014-02-05 | 华为技术有限公司 | Method, device and system for selecting storage resources |
-
2014
- 2014-03-04 CN CN201410077212.XA patent/CN103942011B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102163177A (en) * | 2010-02-24 | 2011-08-24 | 株式会社日立制作所 | Reduction of i/o latency for writable copy-on-write snapshot function |
| CN103080894A (en) * | 2010-12-28 | 2013-05-01 | 株式会社日立制作所 | Storage system, management method of the storage system, and program |
| CN102915275A (en) * | 2012-09-13 | 2013-02-06 | 曙光信息产业(北京)有限公司 | Thin provisioning system |
| CN103561098A (en) * | 2013-11-05 | 2014-02-05 | 华为技术有限公司 | Method, device and system for selecting storage resources |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103942011A (en) | 2014-07-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103942011B (en) | A kind of residual quantity fast photographic system and its application method | |
| CN106255967B (en) | NameSpace management in distributed memory system | |
| CN105593828B (en) | Manage method, distributed memory system and the management node of file | |
| US10242050B2 (en) | Database caching in a database system | |
| CN103761190B (en) | Data processing method and apparatus | |
| CN110058822B (en) | Transverse expansion method for disk array | |
| CN104407935B (en) | Snapshot rollback method and storage device | |
| CN109947363A (en) | A kind of data cache method of distributed memory system | |
| CN101840308A (en) | Hierarchical memory system and logical volume management method thereof | |
| CN102136003A (en) | Large-scale distributed storage system | |
| CN103106047A (en) | Storage system based on object and storage method thereof | |
| CN104317736B (en) | A kind of distributed file system multi-level buffer implementation method | |
| CN105701219B (en) | A kind of implementation method of distributed caching | |
| CN104035887B (en) | A kind of block device buffer storage and its method based on simplify configuration system | |
| CN110321301A (en) | A kind of method and device of data processing | |
| CN107256196A (en) | The caching system and method for support zero-copy based on flash array | |
| CN109697016A (en) | Method and apparatus for improving the storage performance of container | |
| WO2004055675A1 (en) | File management apparatus, file management program, file management method, and file system | |
| CN101976181A (en) | Management method and device of storage resources | |
| CN107943719A (en) | A kind of flash translation layer (FTL) control method based on requests classification | |
| CN112162846B (en) | Transaction processing method, device and computer readable storage medium | |
| CN107329704A (en) | One kind caching mirror method and controller | |
| CN103942301B (en) | Distributed file system oriented to access and application of multiple data types | |
| CN116737363A (en) | Data set cache acceleration method, system, equipment and medium of deep learning platform | |
| CN109669621A (en) | A kind of file management method, file management system, electronic equipment and storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170609 |