DRAM-less solid state disk mapping table management method and device, computer equipment and storage medium
A technology of solid-state hard drives and management methods, applied in computing, memory systems, electrical digital data processing, etc., can solve problems such as unsatisfactory, limited RAM space, and occupying a large amount of RAM space, so as to meet needs, reduce demands, and avoid randomness. The effect of disk capacity increase
Pending Publication Date: 2021-02-23
SHENZHEN YILIAN INFORMATION SYST CO LTD
View PDF0 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0002] The SSD user space mapping table (L2P table) is relatively large, and two-level tables are usually used to manage it: the L2P table is addressed in the order of fixed unit size (MP) to form a first-level mapping table (M2P table), and the L2P table is called Second-level mapping table, because the RAM space provided by the DRAM-less (high-speed non-volatile) SSD system is extremely limited, the M2P resident RAM will occupy more RAM space, and the RAM capacity provided by the system may not meet this demand
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0042] 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 making creative efforts belong to the protection scope of the present invention.
[0043] It should be understood that when used in this specification and the appended claims, the terms "comprising" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude one or Presence or addition of multiple other features, integers, steps, operations, elements, components and / or collections thereof.
[0044] It should also be understood that the terminology used ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a DRAMless solid state disk mapping table management method and device, computer equipment and a storage medium. The method comprises the following steps: converting a logic page number into a mapping table data page number; judging whether a page corresponding to the mapping table data page number is loaded into a memory or not; judging whether mapping corresponding to the mapping table data page number is in a primary mapping table or not; loading mapping corresponding to the mapping table data page number to form mapping of the mapping table data page number; setting a current to-be-scanned secondary mapping table updating log page as a latest secondary mapping table updating log page; reading the latest secondary mapping table to update the log page; judging whether the mapping of the mapping table data page number is in a mapping directory of the mapping table data page number of the latest secondary mapping table updating log page or not; loading a page corresponding to the mapping table data page number into a second-level mapping table cache; and querying a secondary mapping table cache to obtain an NAND address corresponding to the logic page number. According to the invention, the requirement on the system RAM can be reduced, and the cost is reduced.
Description
technical field [0001] The present invention relates to the technical field of DRAM-less solid-state hard disk mapping table management, and more specifically refers to a DRAM-less solid-state hard disk mapping table management method, device, computer equipment and storage medium. Background technique [0002] The SSD user space mapping table (L2P table) is relatively large, and two-level tables are usually used to manage it: the L2P table is addressed in the order of fixed unit size (MP) to form a first-level mapping table (M2P table), and the L2P table is called For the secondary mapping table, because the RAM space provided by the DRAM-less (high-speed non-volatile) SSD system is extremely limited, the M2P resident RAM will occupy more RAM space, and the RAM capacity provided by the system may not be able to meet this demand. Contents of the invention [0003] The purpose of the present invention is to overcome the defects of the prior art, and provide a DRAM-less soli...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): G06F12/02G06F12/0871G06F12/1009
CPCG06F12/0292G06F12/0871G06F12/1009G06F2212/1016G06F2212/1044G06F2212/214Y02D10/00
Inventor 李建华荣杨禹
Owner SHENZHEN YILIAN INFORMATION SYST CO LTD