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OSD (object-based storage device) Selection method, data writing method and device and storage system

A technology for writing data and writing data, which is applied in the computer field, can solve problems affecting the data read/write rate, etc., and achieve the effect of increasing the data writing rate and improving the overall delay

Inactive Publication Date: 2018-06-05
XINHUASAN INFORMATION TECH CO LTD
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Problems solved by technology

[0006] It can be seen from this that for the client to know whether the write operation is completed or not, the above three OSDs need to actually complete the write operation. If the read and write rate of an OSD is poor, the client will In order to know that the write operation is completed, the subsequent read / write data tasks can be performed, which will affect the overall data read / write rate

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[0032]In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of them. implementation. Based on the implementation manners in the present disclosure, all other implementation manners obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present disclosure.

[0033] see figure 2 A schematic diagram of a Ceph-based addressing process is shown, showing the mapping from files to objects, from objects to PGs, and from PGs to OSDs. Among them, an object is a complex of data and data attribute sets, which can manage itself. PG is a logical collection of several objects. To ensure data reliability, objects will be c...

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Abstract

The disclosure provides an OSD (object-based storage device) selection method, a data writing method and device and a storage system. The OSD selection method comprises: in PG (placement group) addressing mapping phase in Ceph, determining from a first available OSD list, an OSD group corresponding to the current PG according to CRUSH algorithm; setting an OSD, having highest reading-writing speed, in the OSD group as a master OSD, and determining the other OSDs in the OSD group expect for the master OSD as slave OSDs; determining from a second available OSD list, a temporary OSD correspondingto the current PG according to the CRUSH algorithm, wherein the temporary OSD is one OSD having highest reading-writing speed in the second available OSD list and is different from those in the OSD group, and the first available OSD list is a subset to the second available OSD list. By using the OSD (object-based storage device) selection method, the data writing method and device and the storagesystem, data reading-writing rate can be increased.

Description

technical field [0001] The present disclosure relates to the field of computer technology, in particular to an OSD selection method, a data writing method, a device and a storage system. Background technique [0002] Ceph is an open source project that provides a software-defined, unified storage solution for block storage, object storage, and file storage. As a distributed storage system with large-scale scalability, high performance, and no single point of failure (if the storage system runs the Ceph protocol, the storage system can also be called a Ceph cluster), it can provide massive, indiscriminate and Unified distributed storage service. [0003] The addressing process of Ceph when reading and writing involves three mappings: mapping from file (file) to object (object), mapping from object to PG (Placement Group, placement group), and mapping from PG to OSD (Object-based Storage Device, based on object's storage device). Among them, the mapping from file to object ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06
CPCG06F3/0611G06F3/0631G06F3/0643G06F3/067
Inventor 祝晓兴顾雷雷
Owner XINHUASAN INFORMATION TECH CO LTD
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