PL reverse metadata storage method, system and device and storage medium
A storage system and metadata technology, applied in the storage field, can solve problems such as the need to improve flashing performance
Active Publication Date: 2020-11-03
北京浪潮数据技术有限公司
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Problems solved by technology
At present, there is no specially designed PL reverse metadata storage scheme, that is, the conventional storage scheme for cached data is adopted, for example, the PL reverse metadata is downloaded to the disk through a set thread, The flashing performance of such a scheme still needs to be improved
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[0037] The core of the present invention is to provide a storage method for PL reverse metadata, which is beneficial to improve the brushing efficiency and system performance.
[0038] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are only 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 making creative efforts belong to the protection scope of the present invention.
[0039] Please refer to figure 1 , figure 1 It is an implementation flowchart of a storage method for PL reverse metadata in the present invention, and the storage method for PL reverse metadata can be applied to an LSA-based all-flas...
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The invention discloses a PL reverse metadata storage method, which is applied to an LSA-based full flash storage system, and comprises the following steps: when generating PL reverse metadata and placing the PL reverse metadata into a cache, allocating a corresponding tree directory and a tree under the tree directory to the PL reverse metadata according to a preset allocation rule; for any tree,when the tree meets a set disk brushing condition, brushing all PL reverse metadata in the tree into a disk from a cache, wherein M tree directories are set in the allocation rule, N CPU cores are arranged in the full-flash storage system, each CPU core is used for being responsible for data processing of each tree directory corresponding to the CPU core, each CPU core at least corresponds to onetree directory, and M and N are positive integers not smaller than 2. By applying the scheme of the invention, the brushing-down efficiency is improved, and the system performance is improved. The invention further provides a storage system and device of the PL reverse metadata and a storage medium, and the corresponding effects are achieved.
Description
technical field [0001] The present invention relates to the field of storage technologies, in particular to a storage method, system, device and storage medium for PL reverse metadata. Background technique [0002] With the popularity of SSD hard drives, all-flash storage systems have become a trend. LSA is a key technology in the all-flash storage system. Through metadata, it can convert random small-block writes into continuous large-block writes, thereby improving storage system performance and SSD disk life. Metadata is the data describing the data. Among them, LP metadata is used to map the LBA ((Logical Block Address, logical block address) delivered by the client to PBA (Physics Block Address, physical block address), that is, the LP metadata L refers to LBA, P refers to PBA. PL refers to reverse metadata, which stores the mapping from PBA to LBA, and is usually used for garbage collection and so on. [0003] In a large-scale storage system, because the amount of me...
Claims
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IPC IPC(8): G06F12/0817G06F12/0884
CPCG06F12/0817G06F12/0884
Inventor 意刘如孙京本李佩
Owner 北京浪潮数据技术有限公司