Start Ssd Cache Performance Modeling - Dell PowerVault Manual

Parameter
Parameter
snapImage
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
Description
The name of the snapshot image. The name of a
snapshot image is comprised of two parts:
• The name of the snapshot group.
• An identifier for the snapshot image in the
snapshot group.
The identifier for the snapshot image can be one of
these:
• An integer value that is the sequence number
of the snapshot in the snapshot group.
• NEWEST - Use this option when you want to
show the latest snapshot image created in the
snapshot group.
• OLDEST - Use this option when you want to
show the earliest snapshot image created in the
snapshot group.
Enclose the snapshot image name in double
quotation marks (" ") inside square brackets ([ ]).
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