Storage device access system
A technology for storage devices and access systems, applied in memory systems, storage systems using special cache structures, instruments, etc., to achieve the effect of improving the writing and reading speed
Inactive Publication Date: 2014-08-20
IBM CORP
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- Abstract
- Description
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- Application Information
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Problems solved by technology
Therefore, in terms of compressing write data and expanding read data, it is only performed to facilitate the use of storage capacity and not to improve write and read data.
Method used
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[0038] The following part describes in detail the preferred embodiment for realizing the present invention based on the accompanying drawings, but the following implementation mode does not limit the present invention according to the scope of the claims, and also requires that the entire combination of the features described in this embodiment be present in the present invention There are no restrictions in terms of form within the solution section. The invention can be carried out in many different modes and it should not be construed as being limited to what is described in the recorded examples. Also, throughout the description of the embodiments, the same symbols are used for the same structural parts and structural elements.
[0039] figure 1 is a view showing a structural example of the storage device access system according to the first embodiment of the present invention. The access system 100 is arranged between an on-chip bus 110 such as a PLB (Processor Local Bus...
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The objective of the present invention is to achieve a storage device access system capable not only of effectively utilizing the storage capacity of a storage device, but of increasing write / read speed. This storage device access system (100) includes: an address search unit (10) which retains, for a plurality of frequently appearing data units, an address and a data index value which has been assigned to each address, and which acquires the address of a write or read data unit in order to search for the retained address using the acquired address; a frequently appearing data retaining unit (20) which retains a tag which has been associated with each of the plurality of frequently appearing data units and data index values, acquires the data index value for when the acquired address from the address search unit (10) matches the retained address in order to identify the frequently appearing data unit corresponding to the tag that has been associated with the acquired data index value; a data comparison unit (30) which acquires the frequently appearing data unit from the frequently appearing data retaining unit (20) so as to compare the same with the write data unit in order to identify the frequently appearing data unit that has matched the write data unit; and a compression / decompression unit (40) which acquires and compresses the write data unit and the frequently appearing data unit from the data comparison unit (30) and acquires and decompresses the read data unit from the storage device.
Description
technical field [0001] The present invention relates to a storage device access system for writing data into or reading data from a storage device, and more particularly to a storage device access system providing data compression-expansion functions. Background technique [0002] Previously, in order to efficiently store data in a memory device, systems compressed (encoded) data when writing data and expanded (decoded) data when reading data. [0003] For example, in Patent Documents 1 and 2, there is disclosed a semiconductor memory device configured to compress write data and expand read data by establishing a data compression-expansion function. [0004] In Patent Document 3, there is disclosed a file compression processing device capable of high-speed playback of files without performing file compression and capable of effectively utilizing files by selecting an appropriate compression method based on the type of file and the frequency of access. [0005] In Patent Doc...
Claims
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IPC IPC(8): G06F12/04G06F3/06G06F13/10
CPCG06F2212/401G06F17/30153G06F12/0871G06F16/901G06F3/0658G06F3/0683G06F2212/27G06F3/0611G06F3/0659G06F12/0893G06F16/1744
Inventor 松瀬秀作
Owner IBM CORP