Dell PowerVault MD 32XX/36XX Series Storage Arrays CLI Guide

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Start SSD Cache Performance Modeling

Description

This command starts performance modeling for the SSD cache. Performance modeling monitors and measures I/O activity for a period of time and estimates performance for various SSD cache sizes. Performance is estimated using two metrics: cache hit percentage and average response time. The performance modeling data is not available until you stop the operation using the stop ssdCache performanceModeling command.

Syntax

start ssdCache [
                                 ssdCacheName] performanceModeling

Parameter

Parameter	Description
`ssdCache`	The alphanumeric identifier (including - and _) of the SSD cache that you want to locate. Enclose the identifier in square brackets ([ ]). If the SSD cache name contains special characters or consists only of numbers, you also must enclose the identifier in double quotation marks (" ") inside square brackets.

Notes

Performance modeling ends and the performance modeling data is available when one of the following conditions occurs:

Run the stop ssdCache performanceModeling command.
Retrieve the performance modeling data using PowerVault MD Storage Manager.

Performance modeling ends, but no data is available when one of the following conditions occurs:

You reboot the RAID controller module.
You make any changes to the SSD cache configuration.
The state of the SSD cache changes.