CN109062735A - A kind of disaster recovery method of storage system, storage system and relevant apparatus - Google Patents
A kind of disaster recovery method of storage system, storage system and relevant apparatus Download PDFInfo
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- CN109062735A CN109062735A CN201810872084.6A CN201810872084A CN109062735A CN 109062735 A CN109062735 A CN 109062735A CN 201810872084 A CN201810872084 A CN 201810872084A CN 109062735 A CN109062735 A CN 109062735A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
Abstract
The application provides a kind of disaster recovery method of storage system, and storage system includes production website, the first disaster tolerance website and the second disaster tolerance website, and disaster recovery method includes: the data of the first disaster tolerance website duplication production website；When producing website or incremental data occurs in the first disaster tolerance website, incremental snapshot recording increment data are utilized；Second disaster tolerance website updates incremental data；When production website is unavailable, the first disaster tolerance website substitution production website；When producing website and unavailable the first disaster tolerance website, the second disaster tolerance website substitution production website.By the data protection for realizing three websites to storage system; incremental data update is only carried out using the second disaster tolerance website; it reduces remote copy and does not support cascade influence, maximize the efficiency that data are synchronous between improving website, effectively increase the redundancy ability of entire storage system.The application also provides a kind of storage system and a kind of computer readable storage medium, has above-mentioned beneficial effect, details are not described herein again.
Description
Technical field
This application involves field of storage, in particular to a kind of disaster recovery method of storage system, a kind of storage system and one kind
Computer readable storage medium.
Background technique
With the rapid development of informationization technology, information system plays increasingly heavier in the key business of various industries
The role wanted.In fields such as communication, finance, medical treatment, e-commerce, logistics, governments, information system service disconnection will lead to huge
Economic loss influences brand image and may cause loss of vital data.Thus it is guaranteed that business continuance is Information System configuration
Key.
In recent years, a wide range of natural calamity occurs often, is guaranteeing business continuity, combines strange land calamity with city Disaster Preparation Center
Standby center " three " center " disaster recovery solution of two places is increasingly paid attention to and is approved by industry.
And existing " in three " center " disaster recovery solution of two places, MCS software I nMetro dual-active is real based on synchronous duplication
Existing, and MCS remote copy is not supported to cascade, i.e., it can only be in only one remote copy relationship, so that existing with a roll
Disaster recovery method realizes that synchronous efficiency is low when polycentric data are synchronous, and it is poor to directly result in redundancy ability.
Therefore the problem of redundancy ability of storage system is those skilled in the art's urgent need to resolve how is improved.
Apply for content
The purpose of the application is to provide a kind of disaster recovery method of storage system, and a kind of storage system and one kind are computer-readable
Storage medium, solves that existing Disaster Tolerant Scheme data synchronization efficiency is low, the problem of redundancy ability difference.
In order to solve the above technical problems, the application provides a kind of disaster recovery method of storage system, the storage system includes
It is as follows to produce website, the first disaster tolerance website and the second disaster tolerance website, specific technical solution:
The first disaster tolerance website replicates the data of the production website, to save two parts of latest datas simultaneously；
When incremental data occur in the production website or the first disaster tolerance website, the increasing is recorded using incremental snapshot
Measure data；
The incremental snapshot volume of the incremental snapshot is sent to the second disaster tolerance website, so that the second disaster tolerance website
Update the incremental data；
When the production website is unavailable, the first disaster tolerance website substitutes the production website；When the production stations
When point and the first disaster tolerance website are unavailable, the second disaster tolerance website substitutes the production website.
Wherein, the second disaster tolerance website updates the incremental data, comprising:
The second disaster tolerance website updates the incremental data according to preset strategy；Wherein, the preset strategy specifically:
It is generated according to the incremental data of the production volume of the production website or the first disaster tolerance volume of the first disaster tolerance website
Incremental snapshot, while generating protection snapshot；
Incremental snapshot described in remote copy；
Judge whether incremental snapshot described in remote copy succeeds；
If so, stopping generating the incremental snapshot and the protection snapshot；
If it is not, executing rolling back action using second disaster tolerance volume of the protection snapshot to the second disaster tolerance website.
Wherein, the second disaster tolerance website updates the incremental data according to preset strategy, comprising:
The second disaster tolerance website periodically updates the incremental data according to preset strategy.
Wherein, when the production website and unavailable the first disaster tolerance website, further includes:
Judge whether remote copy unanimously stops；
If so, stopping the preset strategy, and delete the preset strategy, the incremental snapshot, the protection snapshot
With the data of remote copy；
If it is not, judging whether that remote copy is needed to complete；
If not need remote copy to complete, stop the preset strategy, stop remote copy and deletes remote copy
The second disaster tolerance website is rolled back to consistency protection snapshot by data.
Wherein, when the production website and any unavailable the first disaster tolerance website, further includes:
When remote copy is not synchronous and unanimously stops, snapshot is beaten to second disaster tolerance volume；
When remote copy is synchronizing and withouting waiting for remote copy completion or remote copy not in synchronous and remote copy
When not stopping unanimously, snapshot is beaten to the change volume of the second disaster tolerance volume.
Wherein, the first disaster tolerance website replicate it is described production website data include:
The data of website are produced described in the first disaster tolerance Site synch duplication or asynchronous replication.
The application also provides a kind of storage system, comprising:
Produce website, the first disaster tolerance website and the second disaster tolerance website；
The first disaster tolerance website is used to replicate the data of the production website, and when the production website is unavailable,
Substitute the production website；
The second disaster tolerance website is used to update the incremental data of the production website or the first disaster tolerance website, and works as
When the production website and unavailable the first disaster tolerance website, the production website is substituted.
The application also provides a kind of computer readable storage medium, is stored thereon with computer program, the computer journey
The step of disaster recovery method as described above is realized when sequence is executed by processor.
A kind of disaster recovery method of storage system provided herein, the storage system include production website, the first appearance
Calamity website and the second disaster tolerance website, the disaster recovery method include: the data that the first disaster tolerance website replicates the production website,
To save two parts of latest datas simultaneously；When incremental data occur in the production website or the first disaster tolerance website, increasing is utilized
Amount snapshot records the incremental data；The incremental snapshot volume of the incremental snapshot is sent to the second disaster tolerance website, so that
The second disaster tolerance website updates the incremental data；When the production website is unavailable, the first disaster tolerance website substitution
The production website；When the production website and unavailable the first disaster tolerance website, the second disaster tolerance website substitution
The production website.
The application only carries out production stations using the second disaster tolerance website by the data protection to storage system three websites of realization
The incremental data of point or the first disaster tolerance website updates, without " first standing in three " center " disaster recovery solution of two places as existing
Comparing between point, then the data carried out between website are synchronous.It reduces remote copy and does not support cascade influence, maximize and improve station
The synchronous efficiency of data, effectively increases the redundancy ability of entire storage system between point.The application also provides a kind of storage system
With a kind of computer readable storage medium, there is above-mentioned beneficial effect, details are not described herein again.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of application for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of flow chart of the disaster recovery method of storage system provided by the embodiment of the present application；
Fig. 2 be the first production website, the first disaster tolerance website and second disaster tolerance website provided by the embodiment of the present application it
Between relation schematic diagram；
Fig. 3 be the embodiment of the present application provided by second of production website, the first disaster tolerance website and the second disaster tolerance website it
Between relation schematic diagram；
Fig. 4 is preset strategy flow chart provided by the embodiments of the present application；
Fig. 5 is the flow chart of starting triplicate provided by the embodiment of the present application；
Fig. 6 is the flow chart of creation triplicate snapshot provided by the embodiment of the present application.
Specific embodiment
To keep the purposes, technical schemes and advantages of the embodiment of the present application clearer, below in conjunction with the embodiment of the present application
In attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is
Some embodiments of the present application, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall in the protection scope of this application.
Referring to FIG. 1, Fig. 1 is a kind of flow chart of the disaster recovery method of storage system provided by the embodiment of the present application, deposit
Storage system includes that production website, the first disaster tolerance website and the second disaster tolerance website, the disaster recovery method include:
S101: the first disaster tolerance website replicates the data of the production website, to save two parts of latest datas simultaneously；
In the application, which further includes two disaster tolerance websites in addition to producing website.A typically at least disaster tolerance station
Point needs the relationship synchronous with production website holding data, i.e. production website and a disaster tolerance website remains with newest in real time simultaneously
Data guarantee there are two parts of latest datas at any time in this way, once accident occurs for production website, including as caused by natural calamity
Unexpected or device fails can be substituted production website by disaster tolerance website, guarantee the business continuity of entire storage system
Property.In addition, usually keeping the disaster tolerance website of data synchronized relation and production stations point to be located at same city with production website, but once occur
When natural calamity, the storage equipment in whole piece region is often paralysed simultaneously, needs to utilize the second disaster tolerance positioned at strange land at this time
Website guarantees that service disconnection does not occur for the storage system of production website region.
It is not construed as limiting herein for how the first disaster tolerance website replicates production station data, can be synchronous replicate or different
Step duplication, can also be for period asynchronous replication or using the method etc. of dual-active data center.Certain the application does not limit life
Produce website and the whether same city of the first disaster tolerance website, the relationship for only the two being needed to keep data synchronous.
The corresponding data of production website, which can be referred to as to produce, rolls up Prod_disk, and the corresponding data of the first disaster tolerance website
It is properly termed as the first disaster tolerance volume Primary_DR_disk, is rolled up for saving the production that RPO is 0, is referred to as the pair of production volume
This.The corresponding data of second disaster tolerance website are that the second disaster tolerance rolls up Secondary_DR_disk, namely the triplicate of production volume.
Result in formation of the Disaster Tolerant Schemes that the application proposes " three websites, three copy ".It should be noted that hereafter production website and production
Volume, the first disaster tolerance website and the first disaster tolerance volume and the second disaster tolerance website and the second disaster tolerance volume are generally applicable in meaning.What RPO referred to
It is the grade of recovery point, briefly, RPO 0, it is meant that production volume Prod_disk and the first disaster tolerance roll up Primary_DR_
Difference is not present in disk.And if RPO is not 0, illustrates that production volume Prod_disk and the first disaster tolerance volume Primary_DR_disk are deposited
In difference, difference grade is the value of RPO.
S102: it when incremental data occur in the production website or the first disaster tolerance website, is recorded using incremental snapshot
The incremental data；
This step is intended to pass through incremental snapshot recording increment when producing website or incremental data occurs in the first disaster tolerance website
Data.It should be noted that, although what the data of production website and the first disaster tolerance website synchronized under normal circumstances, but second
Disaster tolerance website can only be connected with one in the two, as long as therefore there is incremental data, that is, need using incremental snapshot record increase
Measure data.Website or the first disaster tolerance website are either produced, using incremental snapshot recording increment data.But it needs to illustrate
, the website being only connected with the second disaster tolerance website just needs using incremental snapshot recording increment data.
S103: the incremental snapshot volume of the incremental snapshot is sent to the second disaster tolerance website, so that described second holds
Calamity website updates the incremental data；
Why the second disaster tolerance website can only update the increment for producing website or the first disaster tolerance website, be because of the second disaster tolerance
Website can only be connected with one in the two.Referring to figs. 2 and 3, Fig. 2 is the first production stations provided by the embodiment of the present application
Relation schematic diagram between point, the first disaster tolerance website and the second disaster tolerance website；Fig. 3 is second provided by the embodiment of the present application
Produce the relation schematic diagram between website, the first disaster tolerance website and the second disaster tolerance website, in Fig. 2 and Fig. 3, ellipse represents each website
Volume, i.e., production website production volume, the first disaster tolerance website the first disaster tolerance volume and the second disaster tolerance website the second disaster tolerance volume, tool
Body, there are two kinds of connection types:
1+2 in parallel: as its name suggests, the first disaster tolerance website and the second disaster tolerance website are connected with production website, i.e., as schemed institute
Show, the first disaster tolerance volume, the second disaster tolerance volume are connected with production volume respectively.
Connect 1+1+1: in this connection type, production website, the first disaster tolerance website, the second disaster tolerance website are sequentially connected.
That is, the second disaster tolerance website can appoint under the premise of producing website and the first disaster tolerance website keeps connection
Select in the two any one be connected.Because the data produced between website and the first disaster tolerance website are all the same, second holds
There is no the variations in data when calamity website update incremental data.But it should be noted that if the second disaster tolerance website and production stations
Point is connected, then the corresponding incremental snapshot of incremental data exists and produces on website.If the second disaster tolerance website and the first disaster tolerance website
Be connected, then the corresponding incremental snapshot of incremental data exist on the first disaster tolerance website.
This step is only updated the incremental data on production website or the first disaster tolerance website, implies that and refers to and need not generate
The snapshot for producing website or first all data of disaster tolerance website at this time, only generates incremental snapshot.It will of course be understood that
It is that, for the consistency for guaranteeing the second disaster tolerance volume, the second disaster tolerance website before receiving incremental snapshot, protect by the consistency for generating itself
Protect snapshot.
S104: when the production website is unavailable, the first disaster tolerance website substitutes the production website；When the life
When producing website and unavailable the first disaster tolerance website, the second disaster tolerance website substitutes the production website.
The application for cause produce the not available concrete reason of website be not construed as limiting, such as can be natural calamity or
The reasons such as equipment fault substitute production website first with the first disaster tolerance website at this time.
If produce website and unavailable the first disaster tolerance website, start the second disaster tolerance website substitution production website at this time.
The present embodiment is by realizing three websites (production website, the first disaster tolerance website and the second disaster tolerance website) to storage system
Data protection, using the second disaster tolerance website only carry out production website or the first disaster tolerance website incremental data update, be not necessarily to picture
It is existing " first to carry out comparing between website in three " center " disaster recovery solution of two places, then the data carried out between website are synchronous.
It reduces remote copy and does not support cascade influence, maximize the efficiency that data are synchronous between improving website, effectively increase and entirely deposit
The redundancy ability of storage system.
Based on the above embodiment, as preferred embodiment, the second disaster tolerance website updates production website or the first disaster tolerance station
The incremental data of point, can be with specifically:
Second disaster tolerance website updates the incremental data of production website or the first disaster tolerance website according to preset strategy；Wherein, in advance
If tactful specifically:
Incremental snapshot is generated according to the incremental data of the production volume of production website or the disaster tolerance volume of the first disaster tolerance website, together
Shi Shengcheng protects snapshot；
Remote copy incremental snapshot；
Judge whether remote copy incremental snapshot succeeds；
If so, stopping generating incremental snapshot and protection snapshot；
If it is not, executing rolling back action using second disaster tolerance volume of the protection snapshot to the second disaster tolerance website.
Incremental snapshot is indicated with LCx, and LCy indicates that protection snapshot, RCy indicate remote copy process, then the above process can be with
Referring to fig. 4, Fig. 4 is preset strategy flow chart provided by the embodiments of the present application.
There is the inspection for judging whether production volume is in coherency state before the second disaster tolerance website updates in the present embodiment default
Survey, and only coherency state detect by when carry out incremental snapshot remote copy namely the second disaster tolerance website it is more newly-increased
Measure the process of data.Why it is remote copy, is to use remote copy because usually apart from each other between each website.
The coherency state detection of production volume refers to that production volume and the copy (i.e. the first disaster tolerance volume) of production volume keep the consistent of data
Property.And under normal conditions, this condition is to meet.When being unsatisfactory for the consistency of production volume, the second disaster tolerance website can not be more
New increment data.
When meeting the consistency of production volume, successively start incremental snapshot LCx, protection snapshot LCy, remote copy RCy.It protects
The data consistency that shield snapshot LCy is used to that the second disaster tolerance to be protected to roll up.
When incremental snapshot LCx and remote copy RCy are completed, stops protection snapshot LCy, also stops remote copy RCy,
It represents the second disaster tolerance volume at this time and has been updated incremental snapshot.
Certainly, as shown in figure 4, the above process can be cyclic process, i.e. the second disaster tolerance website is periodically according to default
Policy update produces the incremental data of website or the first disaster tolerance website.In other words, when there are incremental data and production be rolled up foot
When coherency state, constantly incremental data remote copy can be rolled up to the second disaster tolerance.At this point, the value of RPO can be by user
It is determined by the setting period, for example, if updating once daily, the RPO of a unit is represented one day.Usual RPO is less than
Twice of reasonable period, and the lower limit in period is determined by the link bandwidth between each website.Reasonable period is those skilled in the art
Unsteadiness numerical value well known to member.
Once and remote copy procedure failure, remote copy can be restarted, if remote copy can not be carried out really, at this time may be used
By protecting snapshot LCy by the second disaster tolerance volume rollback supreme consistency time point.
The present embodiment is based on incremental snapshot and remote copy combines, and realizes the data protection of three websites, three copy, utilizes
Remote copy avoids MCS that cascade bring data is not supported to synchronize inefficient influence.
It based on the above embodiment, is starting provided by the embodiment of the present application referring to Fig. 5, Fig. 5 as preferred embodiment
The flow chart of triplicate, when producing website and unavailable the first disaster tolerance website, further includes:
Judge whether remote copy unanimously stops；
If so, stopping preset strategy, and delete preset strategy, incremental snapshot, the data for protecting snapshot and remote copy；
If it is not, judging whether that remote copy is needed to complete；
If not need remote copy to complete, stop preset strategy, stop remote copy and delete the data of remote copy,
Second disaster tolerance website is rolled back to consistency protection snapshot.
Once producing website and when unavailable the first disaster tolerance website, the second disaster tolerance website will be started at this time, that is, open the
The access limit of two disaster tolerance websites.
When starting the second disaster tolerance website, first judge whether remote copy process unanimously stops, namely is necessary to determine whether
All remote copy processes have stopped.If remote copy unanimously stops, stopping preset strategy, and deletes preset strategy, increases
The data measured snapshot LCx, protect snapshot LCy and remote copy, in addition to this it is possible to including LCy2, LC_target, wherein
LCy2 is the rollback snapshot relationship namely consistency protection snapshot of LCy；LC_target is the incremental snapshot volume of production volume, is used for
Variation to Secondary_DR_disk namely the second disaster tolerance volume transmission production volume increment；Change_disk is the second disaster tolerance volume
Change volume, in protection period asynchronous replication process the second disaster tolerance roll up data consistency.
If remote copy does not stop unanimously, and completes without remote copy, preset strategy is terminated at this time, and directly terminate
The data of remote copy are deleted in remote copy, and it is fast that the second disaster tolerance volume Secondary_DR_disk is rolled back to consistency protection
According to.Incremental snapshot LCx, LC_target is finally deleted (to need to wait if remote copy is asynchronous replication and be rolled back to LCy2 completion
Afterwards, LCy, LCy2, change_disk are deleted then).
The purpose for deleting incremental snapshot LCx, protection snapshot LCy and preset strategy etc. is using the second disaster tolerance website as life
Website is produced in use, needing to reconfigure strategy.Because the second disaster tolerance website can not be by its subsequent incremental data reverse sync
To original production website or the first disaster tolerance website.
It is the flow chart of creation triplicate snapshot provided by the embodiment of the present application referring to Fig. 6, Fig. 6, is based on above-mentioned reality
Example is applied, as preferred embodiment, when producing website and any unavailable the first disaster tolerance website, further includes:
When remote copy is not synchronous and unanimously stops, snapshot is beaten to the second disaster tolerance volume；
When remote copy is synchronous and when withouting waiting for remote copy and completing, the change volume of the second disaster tolerance volume is beaten fastly
According to.
Wherein, the data of the first disaster tolerance website duplication production website include:
The data of the duplication of first disaster tolerance Site synch or asynchronous replication production website.
The present embodiment is intended to when producing website and any unavailable the first disaster tolerance website, at this time without starting the second disaster tolerance
Volume (refers to opening access limit), need to only roll up to the second disaster tolerance and carry out observation verification operation, therefore need to only create third at this time
The snapshot of copy.Specifically, beating snapshot to the second disaster tolerance volume when remote copy is not synchronous and unanimously stops.It implies that
Refer to, the data to entire second disaster tolerance website is needed to beat snapshot at this time.It should be noted that beating snapshot is to check for convenience
The data of disaster tolerance volume.
When remote copy is synchronizing and withouting waiting for remote copy completion or remote copy not in synchronous and remote copy
When not stopping unanimously, snapshot is beaten to the change volume of the second disaster tolerance volume, namely snapshot is beaten to change_disk.
Referring to figs. 2 and 3, the application also provides a kind of storage system, comprising:
Produce website, the first disaster tolerance website and the second disaster tolerance website；
First disaster tolerance website is used to replicate the data of production website, and when production website is unavailable, substitution production website；
Second disaster tolerance website is used to update the incremental data of production website or the first disaster tolerance website, and when producing website and the
When one disaster tolerance website is unavailable, substitution production website.
Certainly, producing website and the first disaster tolerance website can also be used to record when there is incremental data using incremental snapshot
Data, and the incremental snapshot of incremental snapshot volume is sent to the second disaster tolerance website.
The corresponding production website of production volume in Fig. 2 and Fig. 3, the first disaster tolerance roll up corresponding first disaster tolerance website, the second disaster tolerance volume pair
Answer the second disaster tolerance website.Fig. 2 and Fig. 3 is two different connection types included by storage system provided by the present application.
Present invention also provides a kind of computer readable storage mediums, have computer program thereon, the computer program
It is performed and step provided by above-described embodiment may be implemented.The storage medium may include: USB flash disk, mobile hard disk, read-only deposit
Reservoir (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or
The various media that can store program code such as CD.
Each embodiment is described in a progressive manner in specification, the highlights of each of the examples are with other realities
The difference of example is applied, the same or similar parts in each embodiment may refer to each other.For embodiment provide system and
Speech, since it is corresponding with the method that embodiment provides, so being described relatively simple, related place is referring to method part illustration
?.
Specific examples are used herein to illustrate the principle and implementation manner of the present application, and above embodiments are said
It is bright to be merely used to help understand the present processes and its core concept.It should be pointed out that for the ordinary skill of the art
For personnel, under the premise of not departing from the application principle, can also to the application, some improvement and modification can also be carried out, these improvement
It is also fallen into the protection scope of the claim of this application with modification.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
Claims (8)
1. a kind of disaster recovery method of storage system, which is characterized in that the storage system includes production website, the first disaster tolerance website
With the second disaster tolerance website, the disaster recovery method includes:
The first disaster tolerance website replicates the data of the production website, to save two parts of latest datas simultaneously；
When incremental data occur in the production website or the first disaster tolerance website, the incremental number is recorded using incremental snapshot
According to；
The incremental snapshot volume of the incremental snapshot is sent to the second disaster tolerance website, so that the second disaster tolerance website updates
The incremental data；
When the production website is unavailable, the first disaster tolerance website substitutes the production website；When the production website and
When the first disaster tolerance website is unavailable, the second disaster tolerance website substitutes the production website.
2. disaster recovery method according to claim 1, which is characterized in that the second disaster tolerance website updates the incremental number
According to, comprising:
The second disaster tolerance website updates the incremental data according to preset strategy；Wherein, the preset strategy specifically:
Increment is generated according to the incremental data of the production volume of the production website or the first disaster tolerance volume of the first disaster tolerance website
Snapshot, while generating protection snapshot；
Incremental snapshot described in remote copy；
Judge whether incremental snapshot described in remote copy succeeds；
If so, stopping generating the incremental snapshot and the protection snapshot；
If it is not, executing rolling back action using second disaster tolerance volume of the protection snapshot to the second disaster tolerance website.
3. disaster recovery method according to claim 2, which is characterized in that the second disaster tolerance website is updated according to preset strategy
The incremental data, comprising:
The second disaster tolerance website periodically updates the incremental data according to preset strategy.
4. disaster recovery method according to claim 2, which is characterized in that when the production website and the first disaster tolerance website
When unavailable, further includes:
Judge whether remote copy unanimously stops；
If so, stop the preset strategy, and delete the preset strategy, the incremental snapshot, the protection snapshot and remote
The data of journey duplication；
If it is not, judging whether that remote copy is needed to complete；
If not need remote copy to complete, stop the preset strategy, stop remote copy and delete the data of remote copy,
The second disaster tolerance website is rolled back to consistency protection snapshot.
5. disaster recovery method according to claim 2, which is characterized in that when the production website and the first disaster tolerance website
When any unavailable, further includes:
When remote copy is not synchronous and unanimously stops, snapshot is beaten to second disaster tolerance volume；
When remote copy is synchronous and without waiting for that remote copy is completed or remote copy does not have in synchronous and remote copy
When consistent stopping, snapshot is beaten to the change volume of the second disaster tolerance volume.
6. disaster recovery method according to claim 1, which is characterized in that the first disaster tolerance website replicates the production website
Data include:
The data of website are produced described in the first disaster tolerance Site synch duplication or asynchronous replication.
7. a kind of storage system characterized by comprising
Produce website, the first disaster tolerance website and the second disaster tolerance website；
The first disaster tolerance website is used to replicate the data of the production website, and when the production website is unavailable, substitution
The production website；
The second disaster tolerance website is used to update the incremental data of the production website or the first disaster tolerance website, and when described
When producing website and unavailable the first disaster tolerance website, the production website is substituted.
8. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer program quilt
The step of processor realizes disaster recovery method as claimed in any one of claims 1 to 6 when executing.
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| CN110351386A (en) * | 2019-07-23 | 2019-10-18 | 无锡华云数据技术服务有限公司 | It is a kind of difference copy between increment synchronization method and device |
| CN110825546A (en) * | 2019-09-12 | 2020-02-21 | 烽火通信科技股份有限公司 | Recovery method, system and equipment terminal for high-availability database cluster |
| US20240012718A1 (en) * | 2022-07-07 | 2024-01-11 | Dell Products L.P. | Recovery aware data migration in distributed systems |
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