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Memory subsystem, management method thereof and computer system containing memory subsystem

A computer system and storage technology, applied in storage systems, computing, instruments, etc., can solve the problems of difficult storage, difficult storage installation, server storage capacity limitations, etc., and achieve the effect of increasing storage capacity and high cost performance.

Inactive Publication Date: 2009-11-04
IBM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, due to cost considerations, it is difficult to provide a large memory capacity while ensuring a high memory access rate
[0004] In addition, in a computer system as a server system, it is difficult to mount a large amount of memory in a server while maintaining a very high memory access rate due to problems such as the complexity of electronic design automation (EDA) design.
Therefore, the memory capacity of the server is limited

Method used

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  • Memory subsystem, management method thereof and computer system containing memory subsystem
  • Memory subsystem, management method thereof and computer system containing memory subsystem
  • Memory subsystem, management method thereof and computer system containing memory subsystem

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Embodiment Construction

[0017] Embodiments of the present invention will be described below with reference to the drawings. It should be noted that representation and description of components and processes that are not related to the present invention and known to those of ordinary skill in the art are omitted from the drawings and descriptions for the purpose of clarity.

[0018] figure 1 is a schematic diagram showing a computer system and a memory subsystem therein according to an embodiment of the present invention. Such as figure 1 As shown, CPU 100 accesses memory subsystem 120 via system bus 110 . The memory subsystem 120 includes a first memory 130 connected to the system bus 110 , a second memory 140 connected to the system bus 110 and a switch 150 connected to the system bus 110 . The access rate of the second memory 140 is lower than that of the first memory 130 .

[0019] The system bus 110 can be any bus used to connect a main processor (such as a CPU), memory and other devices (suc...

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Abstract

The invention discloses a memory subsystem, a management method thereof and a computer system containing the memory subsystem. The memory subsystem comprises a first memory and a second memory which are connected to a system bus, and an exchanger independent from the system bus, wherein the performance of the first memory is superior to that of the second memory, and the exchanger is arranged for responding to an exchange command from the outside of the memory subsystem and performing content exchange of at least one designated physical storage block of the second memory and one corresponding physical storage block of the first memory.

Description

technical field [0001] The present invention relates to computer memory technology, and more particularly to memory subsystems, methods of managing memory subsystems, and computer systems including memory subsystems. Background technique [0002] In computer systems, when running eg very large database applications or large system simulation applications, larger memories are increasingly required to avoid frequent I / O accesses to external storage devices. I / O accesses are much slower than memory accesses due to much larger access latencies and addressing overhead, resulting in a large performance penalty. [0003] The memory access rate is different, and its price is also different. Generally, the unit price of fast memory is higher than the unit price of slow memory. Therefore, due to cost considerations, it is difficult to provide a memory with a large capacity while ensuring a high memory access rate. [0004] Also, in a computer system as a server system, it is diffic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F12/00
Inventor 杨诚郑凯沈文博
Owner IBM CORP