Dell PowerVault MD 34XX/38XX Series Storage Arrays CLI Guide

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Stop SSD Cache Performance Modeling

Description

This command stops the performance modeling operation and displays the performance modeling data for the SSD cache. Before running this command, you must start the performance modeling operation with the start ssdCache performanceModeling command. Optionally, you can save the data to a file.

Syntax

stop ssdCache [
                                 ssdCacheName] performanceModeling [file="
                                 filename"]

Parameters

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.
`file`	The file path and the file name to which you want to save the performance modeling data. Enclose the file name in double quotation marks (" "). For example: file="C:\Program Files\CLI\logs \performance.csv" . The default name of the file that contains the performance modeling data is readLinkStatus.csv. You can use any file name, but you must use the .csv extension.

Notes

This command returns the performance modeling information similar to this example. The size of your monitor determines how the information wraps and will affect how the information appears.

SSD Cache Name: my_cache
                                    Start time: 4/18/12 2:38:26 PM IST
                                    Stop time: 4/18/12 2:38:45 PM IST
                                    Duration : 00:00:19

`SSD Cache Performance Modeling Data (Response Time):`
		`SSD Reads`		`HDD Reads`		`HDD Writes`
`Cache Capacity`	`Overall Response Time`	`Avg. Response Time`	`% of I/Os`	`Avg. Response Time`	`% of I/Os`	`Avg. Response Time`	`% of I/Os`
`186 GB`	`0 ms`	`0 ms`	`0.0 %`	`0 ms`	`0.0 %`	`0 ms`	`0.0 %`
`372 GB`	`0 ms`	`0 ms`	`0.0 %`	`0 ms`	`0.0 %`	`0 ms`	`0.0 %`
`557 GB *`	`0 ms`	`0 ms`	`0.0 %`	`0 ms`	`0.0 %`	`0 ms`	`0.0 %`
`558 GB`	`0 ms`	`0 ms`	`0.0 %`	`0 ms`	`0.0 %`	`0 ms`	`0.0 %`
`744 GB`	`0 ms`	`0 ms`	`0.0 %`	`0 ms`	`0.0 %`	`0 ms`	`0.0 %`
`931 GB`	`0 ms`	`0 ms`	`0.0 %`	`0 ms`	`0.0 %`	`0 ms`	`0.0 %`
`1117 GB`	`0 ms`	`0 ms`	`0.0 %`	`0 ms`	`0.0 %`	`0 ms`	`0.0 %`
`1303 GB`	`0 ms`	`0 ms`	`0.0 %`	`0 ms`	`0.0 %`	`0 ms`	`0.0 %`
`1489 GB`	`0 ms`	`0 ms`	`0.0 %`	`0 ms`	`0.0 %`	`0 ms`	`0.0 %`
`1675 GB`	`0 ms`	`0 ms`	`0.0 %`	`0 ms`	`0.0 %`	`0 ms`	`0.0 %`
`1862 GB`	`0 ms`	`0 ms`	`0.0 %`	`0 ms`	`0.0 %`	`0 ms`	`0.0 %`
`*` = Current SSD cache physical capacity.

`SSD Cache Performance Modeling Data (Cache Hit %):`
`Cache Capacity`	`Cache Hit %`
`186 GB`	`0 %`
`372 GB`	`0 %`
`557 GB *`	`0 %`
`558 GB`	`0 %`
`744 GB`	`0 %`
`931 GB`	`0 %`
`1117 GB`	`0 %`
`1303 GB`	`0 %`
`1489 GB`	`0 %`
`1675 GB`	`0 %`
`1862 GB`	`0 %`
`*` = Current SSD cache physical capacity.