Dell 38XX, 34XX Start SSD Cache Performance Modeling, Start snapImage snapGroup112345 rollback

Parameter	Description
	Enclose the snapshot image name in double
	quotation marks (" ") inside square brackets ([ ]).

Notes

The name of a snapshot image has two parts separated by a colon (:):

•The identifier of the snapshot group

•The identifier of the snapshot image

For example, if you want to start a rollback operation for snapshot image 12345 in a snapshot group that has the name snapGroup1, you would use this command:

start snapImage ["snapGroup1:12345"] rollback;

To start a rollback operation for the most recent snapshot image in a snapshot group that has the name snapGroup1, you would use this command:

start snapImage ["snapGroup1:newest"]rollback;

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.

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