Method and system for improving backup efficiency based on multiple snapshots in COW mode

An efficiency and mode technology, applied in the field of improving backup efficiency based on multiple snapshots in COW mode, can solve problems affecting business performance, complex data reading and writing, and low efficiency of data backup, so as to improve backup efficiency and reduce the cost of reading and writing , the effect of reducing the impact

Inactive Publication Date: 2020-06-26
INFORMATION2 SOFTWARE SHANGHAI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, no matter which method is mentioned above, if too many snapshots are created, the performance of the business will be greatly affected, and the various links of the snapshots will make the reading and writing of data very complicated, resulting in low efficiency of data backup

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  • Method and system for improving backup efficiency based on multiple snapshots in COW mode
  • Method and system for improving backup efficiency based on multiple snapshots in COW mode
  • Method and system for improving backup efficiency based on multiple snapshots in COW mode

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Embodiment

[0060] In this embodiment, the steps of the method for improving backup efficiency based on multiple snapshots in the COW mode are as follows:

[0061] Step 1, first create the first snapshot, the process is as follows Figure 3a , Figure 3b As shown in the principle of the traditional COW mode, when creating the first snapshot, there are no other snapshots on the source data volume at this time, and the source data pointer table (source volume pointer) of the source data volume can be directly copied as the snapshot data pointer of the snapshot volume table (snapshot pointer), if there is any data change after the first snapshot is created, such as Figure 3a To change the data block E of the source data volume to H, you need to read the original data from the data block of the source data volume first, and then write the original data into the snapshot volume, such as Figure 3b , and rewrite the snapshot data pointer table of the snapshot volume to point to the new addre...

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Abstract

The invention discloses a method and system for improving data backup efficiency based on multiple snapshots in a COW mode. The method comprises the steps: S1, building a first snapshot for a source data volume, building a snapshot volume at the same time, and building a snapshot data pointer table according to a source data pointer table of the source data volume; step S2, creating a plurality ofsnapshots and a plurality of snapshot volumes, checking whether a pointer pointing to a source data volume data block has snapshot pointers of other snapshot volumes except a source volume pointer ornot when a snapshot data pointer table of each snapshot volume is established, and if so, pointing the snapshot pointer of the snapshot volume to be currently established to the snapshot pointer pointing to the source data volume data block; and S3, when writing operation is carried out on the source data volume and a snapshot pointer points to a source volume data block to be written, reading out the original data of the data block, writing the original data into the corresponding snapshot volume data block, updating the corresponding snapshot pointer point to a new address, and finally writing the new data to be written into the source data volume to cover the original data.

Description

technical field [0001] The invention relates to the technical field of computer data disaster recovery backup, in particular to a method and system for improving backup efficiency based on multiple snapshots in COW mode. Background technique [0002] In recent years, although computer technology has made great progress, data backup technology has not made great progress. The cost and cost of data backup operations are still relatively high, and consume a lot of time and system resources, and the recovery time objective and recovery point objective of data backup are relatively long. [0003] Under traditional technology, people have been using technologies such as data replication, backup, and recovery to protect important data information, and regularly back up or replicate data. Since the data backup process will affect application performance and is very time-consuming, data backup is usually scheduled to be performed when the system load is light (such as at night). In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/14
CPCG06F11/1489G06F11/1448
Inventor 秦文航胡军擎江俊陈勇铨严崇文汪俊
Owner INFORMATION2 SOFTWARE SHANGHAI
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