Solid state disk garbage collection task management method, controller and solid state disk
A technology of solid-state hard disk and management method, applied in the field of storage
Active Publication Date: 2021-01-29
HUAWEI TECH CO LTD
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[0003] When the SSD has many input and output tasks, if the storage space of the SSD is small, the input and output tasks will frequently trigger GC tasks, and the SSD will execute the input and output tasks after executing the GC tasks, resulting in a delay in executing the input and output tasks
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[0043] The technical solution in this application will be described below with reference to the accompanying drawings.
[0044] Such as figure 1 As shown, the storage system includes at least one controller 11 and at least one solid state disk 44 .
[0045] The controller 11 is connected to a host (not shown in the figure) through a storage area network (storage area network, SAN). The controller 11 may be a computing device, such as a server, a desktop computer, and the like. A writing system and application programs are installed on the controller 11 . The controller 11 may receive input output (I / O) requests from a host. The controller 11 can also store the data carried in the I / O request, and write the data into the solid state disk 44 . The controller 11 belongs to the system controller, and the system controller 11 is an independent device, which is different from the control chip in the solid state disk 44 . In this embodiment, the control chip of the solid-state har...
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The present application provides a management method, a controller and a solid-state disk for garbage collection tasks of a solid-state disk. The method includes: confirming whether the solid-state hard disk is in an idle state; when the solid-state hard disk is in an idle state, obtaining a garbage collection task weight, the garbage collection task weight representing the number of garbage collection tasks processed by the solid-state hard disk per unit time; updating the garbage The weight of the recycling task is obtained by obtaining the updated weight of the first target garbage collection task. The updated weight of the first target garbage collection task is greater than the weight of the garbage collection task before the update; and sending a garbage collection task weight update command to the solid state disk. By updating the weight of the first target garbage collection task that is greater than the weight of the current garbage collection task when the solid state disk is in the idle state, the number of garbage collections performed by the solid state disk in the idle state is increased, and the input and output tasks are avoided. For a long time, solid-state drives frequently trigger garbage collection tasks.
Description
technical field [0001] The present application relates to the field of storage, and more specifically, relates to a management method, a controller, and a solid-state disk for garbage collection tasks of a solid-state disk. Background technique [0002] A solid state drive (Solid State Drives, SSD) is a high-performance memory. The SSD includes a controller and a flash memory array, and the flash memory array includes multiple flash memory particles. Each flash memory particle is composed of thousands of physical blocks of the same size. The size of the physical block is generally between hundreds of KB and several MB. Inside each physical block, it is divided into several pages of the same size. The page size is generally 4KB or 8KB. Before writing data, the controller clears the data in the physical block at the granularity of the physical block. When writing data, the controller writes data to the flash memory array at the granularity of pages. The flash memory array ...
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IPC IPC(8): G06F12/02
Inventor 龚陈继杨荣玉冯犇
Owner HUAWEI TECH CO LTD