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Dell PowerFlex 4.6.x Technical Overview

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Cache

PowerFlex supports RAM Read Cache (using DRAM server memory), to enhance system performance.

The caching modes provided by the system are the following:

  • Mode: RAM Read Cache (RMcache).
  • Description: Read-only caching performed by server RAM.
  • Considerations: RAM Read cache, the fastest type of caching, uses RAM that is allocated for caching. Its size is limited to the amount of allocated RAM.
    NOTE: The amount that may be allocated is limited, and can never be the maximum available RAM.
  • Default setting: Disabled, except when storage-only nodes are deployed.

The following table illustrates the caching support matrix:

Table 1. Caching support matrixThis table illustrates the caching support matrix.
System RMcache
PowerFlex Yes
VxFlex Ready Node with Dell PowerEdge 640, Dell PowerEdge R740xd, Dell PowerEdge 840 Yes

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