Method and device for lock management of distributed storage system
A distributed storage and storage technology, applied in the information field, can solve problems such as inability to acquire lock resources, inability to write backup dirty data to disk, and inability to guarantee data consistency, to achieve the effect of ensuring consistency and improving reliability.
Active Publication Date: 2018-09-21
HUAWEI TECH CO LTD
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Problems solved by technology
The problem with this is that the backup node that applies for the lock later cannot obtain the lock resource, and the backup dirty data it owns cannot be written to the disk, and it cannot be accessed by other nodes that first obtained the lock, that is, the data consistency cannot be guaranteed
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[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0052] figure 1 A schematic diagram of the basic architecture of the distributed storage system is shown. A distributed storage system may include multiple hosts, a storage subsystem (that is, a memory), and a distributed lock management server (Distributed Lock Management Server, “DLMS” for short). The host, which may also be called a cache node, may include a local cache, a client agent (Client Agent, referred to as "CA"), and a distributed lock cli...
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The embodiment of the invention provides a lock management method and device for a distributed storage system. The distributed storage system comprises a lock server and at least two cache nodes. The method comprises the steps that the fault of the first cache node is determined; a first lock request message sent by the second cache node is received, dirty data backed up by the first cache node and not written into a memory are cached on the second cache node, the first lock request message carries first indication information, and the first indication information is used for indicating that the second cache node is the standby node of the first cache node; a first lock response message is sent to the second cache node according to the first lock request information. According to the lock management method for the distributed storage system, by adding the first indication information, the data consistency can be ensured when fault is produced on the main node, and reliability is improved.
Description
technical field [0001] The invention relates to the field of information technology, and in particular, to a lock management method and device for a distributed storage system. Background technique [0002] The distributed storage system uses distributed cache (Cache) technology to improve system performance, especially to reduce system delay. The distributed cache system uses power-saving memory as the storage medium to provide power-failure protection capabilities. At the same time, the mirror mirror mechanism is used to realize redundant backup of cache nodes. When the cache master node fails, the backup node will be promoted to the master node, and , the backup dirty data on the backup node can be accessed. Dirty data is the data saved in the local cache but not written to the disk. In addition, when the cache node reads and writes data, it must first obtain a distributed lock before performing subsequent operations. [0003] In the prior art, if the master node fails ...
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IPC IPC(8): G06F11/14
CPCG06F11/1425G06F2201/82G06F2201/885
Inventor 胡毅
Owner HUAWEI TECH CO LTD