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Write data method and computing node and distributed storage system

A distributed storage and computing node technology, applied in the storage field, can solve problems such as complex operation and strong limitations

Active Publication Date: 2020-08-25
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that this scheme is complex to operate, and the fault domain must be forcibly removed, which has strong limitations

Method used

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  • Write data method and computing node and distributed storage system
  • Write data method and computing node and distributed storage system
  • Write data method and computing node and distributed storage system

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Embodiment Construction

[0029] In a distributed storage system, the same data is repeatedly stored on different storage servers, and the data on each storage server is called a copy. This method of protecting data is called multi-copy. , also known as a mirror. The data here are, for example, data blocks or objects. Data block is the data unit of block storage, such as storage area network (storage area network, SAN); object is the data unit of object storage, such as cloud object storage (cloud object storage) or key-value (key-value, KV) storage.

[0030] See attached figure 1 , the host 11 communicates with the distributed storage system, the distributed storage system includes a storage server 12, a storage server 13, a storage server 14 and a storage server 15, and also includes a computing server 16, a computing server 17 and a metadata server 18, the number of each server There can be more (not shown). Wherein, the calculation server is used to receive the data sent from the host 11, and c...

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Abstract

In the distributed storage system, after the computing node receives the write command which carries the target data, the target partition corresponding to the write command is queried according to the tag of the write command; Querying a plurality of hard disk IDs corresponding to the target partition, the plurality of hard disks corresponding to the target partition including a hard disk havinga selected state and a hard disk having an alternate state; the first data is stored to a hard disk in a selected state, but the target data is not stored to a hard disk in an alternate state.

Description

technical field [0001] The invention relates to the field of storage, in particular to distributed storage technology. Background technique [0002] In the prior art, a distributed storage system is divided into multiple fault domains (generally at the granularity of servers or cabinets). Only one copy will be stored in the same fault domain to prevent multiple copies from being inaccessible due to the failure of a single fault domain. Therefore, the system requires that the number of fault domains must be greater than or equal to the number of copies. For example, in a three-replica scenario, at least three or more fault domains are required to ensure that no two replicas are placed in the same fault domain. When a fault domain fails, the data in this fault domain will be rebuilt on other fault domains to ensure the integrity of the number of replicas. [0003] Under the existing technical solution, once the storage pool is created, it is difficult to adjust the copy of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/06
CPCG06F3/0614G06F3/0631G06F3/067G06F3/0674
Inventor 何春雄
Owner HUAWEI TECH CO LTD