CN102841758B - High-effect virtual disk management system - Google Patents
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- CN102841758B CN102841758B CN201110165547.3A CN201110165547A CN102841758B CN 102841758 B CN102841758 B CN 102841758B CN 201110165547 A CN201110165547 A CN 201110165547A CN 102841758 B CN102841758 B CN 102841758B
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Abstract
The present invention discloses a kind of High-effect virtual disk management system, be provided with user computer, user computer is connected with storage servomechanism by network, store servomechanism is connected with block level Storage Media by virtual disk management system, and virtual disk management system is used to virtual disk Storage Media being set up and accesses multiple tool dynamic space allocative effect, and virtual disk management system uses the information of management and control to be surrounded by entity Sector Index table, Storage Media group records table, virtual disk entity section takies table and difference disk relation table, entity and Virtual Space address is allowed to change one-time calculation, to promote the usefulness of virtual disk access.
Description
Technical field
The present invention relates to a kind of High-effect virtual disk management system, entity and Virtual Space address espespecially can be allowed to change one-time calculation, to promote the usefulness of virtual disk access, and allow the High-effect virtual disk management system of the effectiveness Storage Media of block level realizing the dynamic space configuration as virtual disk.
Background technology
US patent number US 7,107,385B2 proposes Storage Virtualization by LayeringVirtual Disk Objects on a File System invention, its content is the extensive support ability of archives economy for Storage Media of application job system, by different kenel Storage Media, as extended disk or network storage media, assemble the volume section (Volume) of archives economy for depositing virtual disk.
Tw Taiwan patent number I307026, for proposing storage management System and method for, its invention use one archives economy servomechanism, a file information (Metadata) servomechanism and object storage device reach the order ground that virtual dividing district carries out the access of archives.By management and the index information of file information servomechanism save File, then by object storage device accessing file content-data.Because the management of archives and index information and real archive content is separated is stored in two and deposits and take on device, as long as make the storage element increasing object storage device, this virtual dividing district Spatial distributions can be made to grow up.
Existing virtual magnetic disc is all for the correspondence of the entity disk space and virtual disk space that provide elastification above, and by using the method for the archives economy managerial ability of operating system or separation file administration and index information and real archive content to reach, but these technology all need extra computation consumption to a certain degree just can reach, namely the access of archives through the conversion of at least two-layer address, can cause the usefulness bottleneck needing virtual disk access application at a high speed.
Summary of the invention
Fundamental purpose of the present invention is be to provide a kind of High-effect virtual disk management system, the Storage Media of block level becomes the entity section set with dynamic size to utilize virtual disk management system to plan, then virtual disk segmentation is write direct in multiple entity section, change to avoid the address needed for the archives economy of operating system in prior art, and then become entity and Virtual Space address conversion one-time calculation, to promote the usefulness of virtual disk access, and Storage Media is allowed to realize the effectiveness of the dynamic space configuration as virtual disk.
For reaching above-mentioned purpose; the present invention is connected with virtual disk management system between storage servomechanism and Storage Media; and storage servomechanism connects user computer by network; and virtual disk management system is provided with disk section planner, management and control segmentation processor, disk access and scheduler, virtual disk drive, disk section distributes and recover, virtual disk storage area segment table working storage, virtual disk write protection turn location device, virtual disk memory access and virtual disk data cache and impact damper, wherein:
This disk section planner, in order to plan that Storage Media becomes the entity section of multiple prior given fixed size, an entity section is minimum applying unit, when after disk section planner planning Storage Media, deposit the entity section of this Storage Media by the state used for an entity Sector Index table can be produced, be not configured to 0 expression; Otherwise be configured to 1 expression, in an initial condition, the value in this concordance list is all 0; Moreover, if when virtual disk management system is connected with multiple Storage Media, then disk section planner can adopt consistent planning mode to each physical storage media, and use a Storage Media group records table deposit all can by the Storage Media information used, each Storage Media can be assigned with unique identifier.
This management and control segmentation processor can in each Storage Media respectively selected multiple entity section do not configured be management and control section as management purposes, a Storage Media can deposit multiple management and control section, but only have one to be main, other is redundant and checks use, to increase the security of significant data, and management and control segmentation processor can by the management and control section in entity Sector Index table and Storage Media group records table write Storage Media.
This disk access and scheduler are the driving element of access and scheduling Storage Media, make the data command of access management purposes have more preferential execution sequence than the data access command of virtual disk.
This virtual disk drive is the controller of the virtual disk on generation, deletion and carry Storage Media, when user computer to store servomechanism send newly-built, delete or the order of mount virtual disk time, store servomechanism this instruction to be forwarded and give virtual disk drive, virtual disk drive is then distributed by disk section and recover obtains new entity section, reclaims the entity section shared by certain virtual disk or inquires all entity sections that this virtual disk takies.
This disk section distributes and recover, it is for execution and complete the entity section increased newly, delete and inquire about shared by certain virtual disk that virtual disk drive sends, when disk section distributes and recover performs instruction, first can obtain up-to-date entity Sector Index table by management and control segmentation processor, to have learnt which entity section can be assigned with, or occupied, moreover, for the instruction of newly-increased virtual disk or the request of requirement configuration entity section, this disk section distributes and recover can by assignable entity section, select entity section with optimization access usefulness for principle to distribute, the entity section that this optimization access usefulness can be close to by prioritizing selection is reached, and produce a virtual disk entity section and take table, the index that this virtual disk entity section takies table is the unique identifier of virtual disk in virtual disk management system, value corresponding to this identification code is binary tandem, in tandem, the component of each group data is made up of the identification code of Storage Media group records table and the entity Sector Index of entity Sector Index table, if and the distribution of disk section and recover are because performing instruction that is newly-built and deletion virtual disk, virtual disk entity section is caused to take the unusual fluctuation of table or entity Sector Index table, the related virtual disk entity section by renewal of meeting takies table or entity Sector Index table is sent to the record that management and control segmentation processor upgrades management and control section.
This virtual disk storage area segment table working storage, it is for accelerating addressing virtual disk in the cache working storage of Storage Media position, under the situation that space is enough, its virtual disk entity section of virtual disk just in use can be taken table content deposit in one can in the working storage of zero access (for disk access).Make virtual disk write protection turn location device can complete fast when calculating the entity section that this virtual disk can actually access; when any virtual disk entity section takies the event generation of table unusual fluctuation; the plan disk entity section that management and control segmentation processor can upgrade in virtual disk storage area segment table working storage takies table, to keep data consistent.
It is that responsible virtual disk can the address conversion of entity section of actual access and two kinds of evaluation works checking that this virtual disk write protection turns location device, user computer carries out the instruction of data access to a certain virtual disk, can pass on and give virtual disk write protection and turn location device to calculate the entity address that Storage Media deposited in by this virtual disk, just carry out the data access of virtual disk afterwards, but the entity section that any access instruction for certain virtual disk should not exceed this virtual disk takies entity section scope that table record this virtual disks all can access to protect the data of multiple virtual disk, avoid mutually reading and write data, if but exception condition is when virtual disk will be about to obtain the new data of the upper write of legal disk virtual location (not exceeding the range of capacity of virtual disk) in the physical storage space of configuration in a certain not yet configuration, new entity section can be configured to the distribution of disk section and recover request, after adding novel entities section, the instruction of former access can be made to meet protective condition, and can normally perform, moreover, if in reading disk during the legal virtual location in a certain physical storage space do not configured, namely this reading command reads the address not write data, as long as then reply clear data, do not need to configure new entity section.In addition, discontinuous entity section configuration may cause access instruction to operate multiple entity section, one Command Resolution is become the instruction of multiple access single entities sector data by this kind of action need across entity section, after this little instruction completes, has just calculated former instruction; Further, the similar snapshot disk of traditional virtual magnetic disc definition or the function of difference disk (Snapshot or DifferentialDisks) also turn location device by virtual disk write protection and are responsible for, unification is referred to as with difference disk, difference disk is in fact also considered as a virtual disk, suppose in system, there is a certain virtual disk first and user sets up a difference disk second to virtual disk first, now, to virtual disk first write data, can by unloading to difference disk second; If to virtual disk first sense data, have two kinds of possibilities: the first, if read the data being once written into difference disk second, then can be read by difference disk second; The second, if read the data being never written into difference disk second, then directly can be read by virtual disk first, therefore, the state that difference disk can make the virtual disk of its correspondence become read-only; In order to reach above-mentioned functions; virtual disk write protection turns location device can set up difference disk relation table; the index field of difference disk relation table is the unique number of certain difference disk; the virtual disk numbering that its respective value links for this difference disk; if there is the record of the identical virtual disk numbering of complex, then represent a certain virtual disk and set up multiple difference disk.To delete a certain difference disk, as long as then delete the record in difference disk relation table, then reseting entity Sector Index table opposite position to discharge the entity section shared by it, finally upgrading the content of management and control section again.If a certain virtual disk is deleted, then all necessary synchronization removal of difference magnetic disc storage building on this virtual disk in difference disk relation table, and the content of synchronized update management and control section; Finally, if multi-level difference disk connection, as long as the virtual disk field in difference disk relation table inserts a certain difference disk number.
This virtual disk memory access, it is the implementation element of traditional virtual magnetic disc, is responsible for (virtual) disk of being obtained by user side with traditional virtual disc format, as VMDK, VHD and VDI write Storage Media.When calculating the actual accessing stored media address of traditional virtual disc format, need to add that turning location device by virtual disk write protection tables look-up the side-play amount of the entity section obtained, namely the access of data only needs disposable calculating to complete.
This virtual disk data cache and impact damper, in order to accelerate cache and the impact damper of virtual disk data access, to reduce the reading times to Storage Media, and allow the action of write data asynchronously complete, reduce the response time of write instruction, this virtual disk data cache and impact damper and traditional data cache and impact damper difference are, virtual disk write protection turns location device provides difference disk function, the difference disk of a virtual disk and one or more connection thereof is caused to have different frequencies of access, suppose that the difference disk being connected in a certain virtual disk to multiple pass reads certain identical address, if most difference disk had not write this address, reading address real after then turning location will return in reading certain the identical address on virtual disk, based on this characteristic, cache is by the virtual disk that the correlates data than its difference disk of cache, in the space availability ratio of cache and hit in rate more efficient, similar, with data access tool region and the centrality of time (locality), the data be just written into, may be cited immediately, therefore, write virtual disk data cache and impact damper, except completing write instruction as conventional practice with non-synchronized manner, reduce outside the response time, also the cache chance that the data tool of just write is higher is allowed, particularly to the data of difference disk write, briefly, virtual disk data cache and impact damper, for reading command, can be strengthened by the virtual disk data cache correlated, and for write instruction, can strengthen the data quick of difference disk.
Accompanying drawing explanation
Fig. 1 is that the present invention connects the schematic diagram storing servomechanism.
Fig. 2 is calcspar of the present invention.
Fig. 3 is management and control section content of the present invention.
Fig. 4 is that the present invention is in the initialized operation workflow figure of Storage Media.
Fig. 5 is the present invention in setting up, deleting and the operation workflow figure of mount virtual disk.
Fig. 6 is that the present invention is in the operation workflow figure of process access instruction.
Description of reference numerals: 1, user computer; 2, network; 3, servomechanism is stored; 4, virtual disk management system; 41, disk section planner; 42, management and control segmentation processor; 43, disk access and scheduler; 44, virtual disk drive; 45, disk section distributes and recover; 46, virtual disk storage area segment table working storage; 47, virtual disk write protection turns location device; 48, virtual disk memory access; 49, virtual disk data cache and impact damper; 5, Storage Media; 51, the first Storage Media; 511, entity section; 512, management and control section; 5121, Storage Media group records table; 5122, first instance Sector Index table; 5123, second instance Sector Index table; 5124, difference disk relation table; 5125, virtual disk entity section takies table; 52, the second Storage Media; 521, entity section.
Embodiment
Refer to shown in Fig. 1 and Fig. 2, find out by knowing in figure, the use-pattern of High-effect virtual disk management system of the present invention is that user computer 1 connects one or more storage servomechanism 3 by network 2, and store servomechanism 3 by virtual disk management system 4 and be connected with a Storage Media 5 to multiple stage, and virtual disk management system 4 is provided with disk section planner 41, management and control segmentation processor 42, disk access and scheduler 43, virtual disk drive 44, disk section distributes and recover 45, virtual disk storage area segment table working storage 46, virtual disk write protection turns location device 47, virtual disk memory access 48 and virtual disk data cache and impact damper 49.
Refer to shown in Fig. 1 to Fig. 4, when Storage Media 5 is when carrying out initialization process flow process, accomplished by joint efforts by disk section planner 41, management and control segmentation processor 42 and disk access and scheduler 43, now disk access and scheduler 43 first detect the Storage Media 5 that High-effect virtual disk management system connects, and the quantity of Storage Media 5 is sent to disk section planner 41; For to be described with two groups of Storage Medias 5 in this embodiment, disk access and scheduler 43 are detected and connects spendable all Storage Medias 5, be the first Storage Media 51 and the second Storage Media 52 totally two groups, represent with numbering 0 and 1 respectively.Now, Storage Media 5 quantity that disk section planner 41 is detected according to disk access and scheduler 43, set up out Storage Media group records table 5121 (as shown in Figure 3), and this Storage Media group records table 5121 is transferred to management and control segmentation processor 42, and after disk section planner 41 learns Storage Media 5 quantity, disk section planner 41 can with a fixing section capability value given in advance, by the first Storage Media 51 with the second Storage Media 52 with consistent planning mode, planning becomes multiple entity section 511, 512, and respectively first instance Sector Index table 5122 and second instance Sector Index table 5123 are produced to the first Storage Media 51 and the second Storage Media 52, with the present embodiment, when the first Storage Media 51 amount of capacity is 1Terabyte, for programming becomes the entity section 511 of 1024 prior given 1Gigabyte (GB) fixed capacities, each entity section 511 is minimum applying unit, utilize Sector Index value can fast a certain section of addressing at the actual address of the first Storage Media 51, such as: i-th section originates in the address of i x 1GB, end at the address of (i+1) x 1 GB 1, after having determined the capacity of entity section 51, disk section planner 41 then produces a first instance Sector Index table 5122 and deposits entity section 511 by the state used, and is not configured to 0 expression, otherwise be configured to 1 expression.In an initial condition, the value in this concordance list is all 0.Make disk section planner 41 that first instance Sector Index table 5122 and second instance Sector Index table 5123 are transferred to management and control segmentation processor 42 again, and management and control segmentation processor 42 for each Storage Media 5 can select multiple (this example be the first Storage Media 51 the 0th and last) entity section 511 become main and backup management and control section 512, and by first instance Sector Index table 5122 the 0th and last entity Sector Index on insert 1, representative is assigned with use, and allow disk section planner 41 by first instance Sector Index table 5122, second instance Sector Index table 5123 and Storage Media group records table 5121 write management and control section 512.
Refer to shown in Fig. 1 to Fig. 3 Yu 5 figure, after the work of initialization Storage Media 5 completes, virtual disk management system 4 can process the operational order performing the foundation of virtual disk, deletion and carry from user computer 1 by storing servomechanism 3, as shown in Figure 5, the operation of this type is become by carry on archives economy as traditional network hard disc can be identical by the action of the storage area operated, such as, store servomechanism 3 and can be iSCSITarget end, user computer 1 can be iSCSI Initiator and holds.Perform the foundation of virtual disk, the operational order work of deletion and carry is distributed by the virtual disk drive 44 of virtual disk management system 4, disk section and recover 45, management and control segmentation processor 42 and disk access and scheduler 43 have been pulled together.When user computer 1 sends operational order by storing servomechanism 3, store servomechanism 3 for operational order being sent to virtual disk management system 4, now virtual disk drive 44 first differentiates operational order type, if the instruction of newly-built virtual disk, then can ask the new entity section 511 of configuration or entity section 521 to the distribution of disk section and recover 45, this embodiment illustrates with No. 1 of the first Storage Media 51 and No. 52 entity sections 51, and by given for a newly-established virtual disk unique serial code, be assumed to be numbering 0, and its entity section 511 index value just distributed is recorded in virtual disk entity section takies table 5125, and insert the sizes values of newly-built disk in instruction, namely (this example is 2GB to the effective addressing space of this disk maximum, as shown in Figure 3), and the capacity of virtual disk can exceed actual allocated capacity, as long as before re-using, complete the quantity expanding actual entities section 511.Then, it is seizure condition that management and control segmentation processor 42 can upgrade first instance Sector Index table 5122 relative position, is namely updated to 1.Moreover, if the instruction of newly-built difference disk, suppose newly to set up the difference disk that virtual disk 1 is virtual disk 0, then need to increase this new disk and be recorded in difference disk relation table 5124 (as shown in Figure 3) with the connection of the virtual disk 0 of being specified by parameter, the difference disk set up, the capability value of its disk equals the virtual disk of its connection, and difference disk relation table 5124 can write management and control section 512 by management and control segmentation processor 42 and disk access and scheduler 43 after upgrading, it is consistent that its process and above-mentioned initialization Storage Media 5 write management and control section 512, therefore repeat no more backward.If virtual disk drive 44 receives the instruction of deleting virtual disk, the target disk of deletion must be specified in instruction to be numbered parameter, first the entity section 511 shared by it or entity section 521 is discharged, and upgrade relevant first instance Sector Index table 5122 or second instance Sector Index table 5123 is non-configuration status, then, only need take in table 5125 in virtual disk entity section and find and delete this record, this virtual disk can be eliminated; If the object deleted is difference disk, the record of this difference disk separately need be deleted by difference disk relation table 5124; If once set up the virtual disk of difference disk, all differences disk of its associated also needed to delete in the lump.Again, for the instruction of mount virtual disk, as long as by management and control segmentation processor 42, virtual disk drive 44 checks whether target virtual disk has been present in virtual disk entity section and has taken table 5125, and check in difference disk relation table 5124, whether it has the difference disk of associated, then, entity section 511,521 loading system taken.If the instruction that virtual disk drive 44 receives not is above-mentioned several types, may be such as the status poll instruction of Storage Media 5, these instructions by consistent with the element work flow of traditional standard, therefore not be emphasized in the present invention.Some functions needed because of management purposes, such as, enumerate all registered virtual disks or difference disk, add or delete the functions such as new Storage Media 5, though do not describe in detail, can be analogized easily by foregoing, also do not emphasize in the present invention.
Refer to shown in Fig. 1 to Fig. 3 Yu Fig. 6, after virtual disk is by user computer 1 carry, then get final product the access instruction of Service Virtual disk.This workflow turns location device 47 by management and control segmentation processor 42, disk access and scheduler 43, the distribution of disk section and recover 45, virtual disk storage area segment table working storage 46 and virtual disk write protection and completes.When virtual disk drive 44 receives after virtual disk gets the instruction of deposit data, deliver and turn location device 47 by virtual disk write protection and process (as shown in Figure 5), virtual disk write protection turn location device 47 can be distributed by virtual disk storage area segment table working storage 46 (faster) or disk section and recover 45 (more at a slow speed, because need by the reading of 512 sections, the management and control district on Storage Media 5) learn that virtual disk entity section takies table 5125, obtain the entity section 511 of the Storage Media 5 that this virtual disks all can access, 521, then the inspection of legitimacy can first be done, any access instruction for this virtual disk should not exceed these scopes, otherwise this instruction should not be performed, when virtual disk is by data new for upper for the legal virtual location (not exceeding the range of capacity of virtual disk) in a certain physical storage space do not configured write, can first to the entity section 511 that disk section distributes and recover 45 asks configuration new, 521, and the data upgraded in management and control section 512, the instruction of former access is made still to meet protective condition and normally perform.Above-mentioned action can calculate the entity address that Storage Media 5 deposited in by this virtual disk, after carry out real data access by virtual disk memory access 48 on Storage Media 5 according to virtual disk form; This virtual disk form is consistent with conventional practice, therefore does not find expression in process flow diagram.Moreover, whether access instruction is that difference disk has different processing modes by target disk, and after a certain virtual disk is established a difference disk, this virtual disk presents a read states, be subject to the protection avoiding writing data, the data of write can by unloading to its difference disk; But sense data then has and has two kinds of possibilities: if read the data being once written into difference disk, then can be read by difference disk; If read the data being never written into difference disk, then directly can be read by virtual disk.
Finally, the part that virtual disk data cache and impact damper 49 duplicate at access operation principles and traditional fetching-rapidly method of virtual disk is not described in detail, and virtual disk data cache and its operational characteristics of impact damper 49 are the instruction for reading, the preferential cache of meeting was once established the virtual disk data of difference disk; For write instruction, the data of meeting preferential cache write difference disk, if cache insufficient space, the high priority data obtained by reading command is in the data be just written into.
In sum, High-effect virtual disk management system of the present invention under the support of the archives economy without the need to operating system, the Storage Media 5 of multiple block level can realize the effectiveness of dynamic space configuration, in order to deposit and to manage multiple virtual disk.And the calculating loss of efficacy of running job system and archives economy thereof can be avoided because of the present invention, reduce the calculating consumption of the archives economy address conversion of one deck costliness, therefore possess access usefulness at a high speed.Therefore, utilize technology of the present invention, the storage area utilization factor of conventional storage media 5 technology can be promoted, and therefore do not cause and significantly access loss of efficacy.
More than illustrate just illustrative for the purpose of the present invention, and nonrestrictive, and those of ordinary skill in the art understand; when not departing from the spirit and scope that following claims limit, many amendments can be made, change; or equivalence, but all will fall within the scope of protection of the present invention.
Claims (2)
1. a High-effect virtual disk management system, it is characterized in that, be provided with user computer, user computer is connected with storage servomechanism by network, store servomechanism is connected with block level Storage Media by virtual disk management system, and virtual disk management system is set up on Storage Media and access multiple virtual disk with dynamic space allocative effect, and virtual disk management system uses the information bag of management and control, entity Sector Index table drawn together by this information handbag, Storage Media group records table, virtual disk entity section takies table and difference disk relation table, wherein:
This entity Sector Index table be virtual disk management system with a fixing section capability value given in advance, by each Storage Media with consistent planning mode, planning becomes multiple entity section, and then produces entity Sector Index table;
To be virtual disk management system allly in virtual disk management system connected and after spendable Storage Media quantity, can distribute unique identifier to each Storage Media detecting this Storage Media group records table, thus set up Storage Media group records table;
This virtual disk entity section takies table and includes virtual disk numbering, entity Sector Index, virtual disk is numbered virtual disk management system in process from user computer, by store servomechanism perform virtual disk set up operational order time, given for the virtual disk of a foundation unique serial code produced by virtual disk management system, and entity Sector Index to be record virtual disk management system configure new entity sector sequence;
This difference disk relation table is that virtual disk management system is in processing from user computer, by store servomechanism perform difference disk set up operational order time, the given unique serial code of difference disk that virtual disk management system will be set up, and the serial code of the serial code of the virtual disk associated with it and difference disk is recorded in difference disk relation table;
This virtual disk management system selected main and multiple secondary entity section on Storage Media is used as management and control section, deposits entity Sector Index table, Storage Media group records table, virtual disk entity section take table and difference disk relation table,
This virtual disk management system obtains entity Sector Index table by management and control section, to have learnt which entity section can be assigned with or occupied, when virtual disk management system perform newly-built, delete and the instruction of mount virtual disk time, can allocation entity section to virtual disk, reclaim the entity section shared by virtual disk or inquire the entity section that this virtual disk takies.
2. a High-effect virtual disk management system, it is characterized in that, be provided with user computer, user computer is connected with storage servomechanism by network, store servomechanism is connected with block level Storage Media by virtual disk management system, and virtual disk management system is set up on Storage Media and access multiple virtual disk with dynamic space allocative effect, and virtual disk management system uses the information bag of management and control, entity Sector Index table drawn together by this information handbag, Storage Media group records table, virtual disk entity section takies table and difference disk relation table, wherein:
This entity Sector Index table be virtual disk management system with a fixing section capability value given in advance, by each Storage Media with consistent planning mode, planning becomes multiple entity section, and then produces entity Sector Index table;
To be virtual disk management system allly in virtual disk management system connected and after spendable Storage Media quantity, can distribute unique identifier to each Storage Media detecting this Storage Media group records table, thus set up Storage Media group records table;
This virtual disk entity section takies table and includes virtual disk numbering, entity Sector Index, virtual disk is numbered virtual disk management system in process from user computer, by store servomechanism perform virtual disk set up operational order time, given for the virtual disk of a foundation unique serial code produced by virtual disk management system, and entity Sector Index to be record virtual disk management system configure new entity sector sequence;
This difference disk relation table is that virtual disk management system is in processing from user computer, by store servomechanism perform difference disk set up operational order time, the given unique serial code of difference disk that virtual disk management system will be set up, and the serial code of the serial code of the virtual disk associated with it and difference disk is recorded in difference disk relation table;
This virtual disk management system selected main and multiple secondary entity section on Storage Media is used as management and control section, deposits entity Sector Index table, Storage Media group records table, virtual disk entity section take table and difference disk relation table,
The record content that the virtual disk entity section of the virtual disk in use can be taken table by this virtual disk management system is deposited in the working storage of zero access, and the event that any virtual disk entity section takies table unusual fluctuation is when occurring, table can be taken by the virtual disk entity section upgraded in management and control section and working storage simultaneously.
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| CN101008886A (en) * | 2006-01-26 | 2007-08-01 | 普安科技股份有限公司 | Storage virtual computer system and management data snapshot image method in storage system |
| CN100403277C (en) * | 2002-08-09 | 2008-07-16 | 网络装置公司 | Storage virtualization by layering virtual disk objects on a file system |
| CN101788890A (en) * | 2009-01-23 | 2010-07-28 | 普安科技股份有限公司 | Method for generating virtual volume in storage system architecture and data access method |
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| US6779094B2 (en) * | 2000-06-19 | 2004-08-17 | Storage Technology Corporation | Apparatus and method for instant copy of data by writing new data to an additional physical storage area |
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| CN100403277C (en) * | 2002-08-09 | 2008-07-16 | 网络装置公司 | Storage virtualization by layering virtual disk objects on a file system |
| CN101008886A (en) * | 2006-01-26 | 2007-08-01 | 普安科技股份有限公司 | Storage virtual computer system and management data snapshot image method in storage system |
| CN101788890A (en) * | 2009-01-23 | 2010-07-28 | 普安科技股份有限公司 | Method for generating virtual volume in storage system architecture and data access method |
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