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Data truncation method and device based on erasure code

A technology of data truncation and erasure code, which is applied in the field of data truncation based on erasure code, can solve the problems of truncation operation amplification, affecting the performance of erasure code, and reducing the writing performance of distributed storage system, so as to solve the problem of write amplification, The effect of improving write performance

Active Publication Date: 2021-11-05
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the need to consider the impact of other write transactions on the truncation operation, it is necessary to do additional fault-tolerant processing on the truncation operation, resulting in the amplification of the truncation operation
The amplification of the truncation operation includes the backup and deletion of some data in the data to be truncated, which affects the performance of the erasure code and reduces the write performance of the distributed storage system

Method used

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  • Data truncation method and device based on erasure code
  • Data truncation method and device based on erasure code
  • Data truncation method and device based on erasure code

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0026]The distributed storage system stores the data that needs to be stored sent by the user through the client in a distributed manner on multiple storage nodes. In order to enhance the reliability of the distributed storage system and the ability to To migrate data from one storage node to another, in order to facilitate data migration between storage nodes, users need to organize, migrate and maintain the stored data in units of data maintenance units, including data maintenance after abnormal recovery of storage nodes Data recovery is also performed in units of data maintenance units. The data that users need to store will first be divided into several data maintenance units, and each data maintenance unit will be stored in different storage nodes. Therefore, the storage node is an indispensable component in the distributed storage system, and the data maintenance unit is also an indispensable concept in the distributed storage system. However, for different specific dis...

Embodiment approach

[0037] As an implementation manner, the method for executing the data truncation command may include:

[0038] First, the OSD node 10 generates a log version number according to preset rules. The log version number is the unique number of the operation log of the data truncation command, and each data truncation command corresponds to a log version number.

[0039] Secondly, the OSD node 10 obtains the slave OSD node list that stores the data to be truncated corresponding to the object according to the object ID, that is, the OSD node 30, OSD node 40, etc. slave OSD node lists, and the log version number, the object in the data truncation command The ID and the truncation position in the object are sent to the OSD node 30, OSD node 40 and other slave OSD nodes, so that the OSD node 30, OSD node 40 and other slave OSD nodes execute the data truncation command. At the same time, the OSD node 10 executes the data truncation command to truncate the data to be truncated correspond...

no. 2 example

[0056] Please refer to Figure 6 , Figure 6 A schematic block diagram of an erasure code-based data truncation device 200 provided by an embodiment of the present invention is shown. The data truncation device 200 based on erasure codes is applied to storage nodes in a distributed storage system, and includes a receiving module 201 , a judgment module 202 , a data truncation module 203 , a determination module 204 and a control module 205 .

[0057] The receiving module 201 is configured to receive a data truncation command sent by the client, wherein the data truncation command is generated by the client in response to the file truncation request to truncate the data to be truncated stored in the storage node.

[0058] In the embodiment of the present invention, the receiving module 201 may be used to execute step S101.

[0059] The judging module 202 is configured to judge whether there is a data writing transaction being processed on the data maintenance unit to which th...

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Abstract

The present invention relates to the field of distributed storage technology, and provides a data truncation method and device based on erasure codes. The method includes: receiving a data truncation command sent by a client, wherein the data truncation command is generated by the client in response to a file truncation request , to truncate the data to be truncated stored in the storage node; determine whether there is a data writing transaction being processed on the data maintenance unit to which the data to be truncated belongs, and if so, wait for the data writing transaction being processed to be processed before executing the data A truncation command; when there is no data writing transaction being processed on the data maintenance unit to which the data to be truncated belongs, the data truncation command is executed. By ensuring that there is no data writing transaction being executed before the truncation command is executed, the present invention avoids backup and deletion operations of part of the data to be truncated, solves the problem of write amplification during data truncation, and improves the writing performance of the distributed storage system.

Description

technical field [0001] The present invention relates to the technical field of distributed storage, in particular to a data truncation method and device based on erasure codes. Background technique [0002] In distributed storage systems, erasure codes have been applied to object storage, block storage, and file system storage. Erasure codes need to perform distributed fault-tolerant processing on all write operations (including truncation operations) during business processing to prevent node failures from destroying data. However, since the impact of other write transactions on the truncation operation needs to be considered, additional fault-tolerant processing must be performed on the truncation operation, resulting in the amplification of the truncation operation. The amplification of the truncation operation includes backup and deletion of some data in the data to be truncated, thus affecting the performance of the erasure code and reducing the writing performance of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/07G06F11/10
CPCG06F11/0727G06F11/1004
Inventor 王文锋
Owner NEW H3C TECH CO LTD
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