Enabling the RAID Controller Card Cache

Purpose

Optimize the cache settings of the RAID controller card to improve the RWTD performance.

Procedure

Use the Storage Command Line Tool (StorCLI) to modify the cache settings of the RAID array. Set Read Policy to Read Ahead and use the cache of the RAID controller card for pre-reading. Set Write Policy to Write Through. Set IO Policy to Direct IO.

1. Configure the cache of the RAID controller card. In the command, vx indicates the volume group number (v0, v1, and v2, etc.). Set vx based on the environment requirements.

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   ./storcli64_arm /c0/vx set rdcache=RA ./storcli64_arm /c0/vx set wrcache=WT ./storcli64_arm /c0/vx set iopolicy=Direct

   

   Replace c0 with the actual controller ID and vx with the actual virtual drive ID.

2. Check whether the configuration has taken effect.

   1	./storcli64_arm /c0 show