484 Implementing the IBM Storwize V5000 Gen2 with IBM Spectrum Virtualize V8.1
This command can be canceled by running analyzevdisk <volume ID> -cancel.
The lsvdiskanalysis command provides a list and the status of the volumes. Some of
them can be analyzed already, some of them not yet. The command can either be used for
all volumes on the system or per volume, similar to lsvdisk (Example 9-11).
Example 9-11 Example of the command run over one volume with ID 0
IBM_2078:ITSO Gen2:superuser>lsvdiskanalysis 0
id 0
name SQL_Data0
state estimated
started_time 151012104343
analysis_time 151012104353
capacity 300.00GB
thin_size 290.85GB
thin_savings 9.15GB
thin_savings_ratio 3.05
compressed_size 141.58GB
compression_savings 149.26GB
compression_savings_ratio 51.32
total_savings 158.42GB
total_savings_ratio 52.80
accuracy 4.97
The state parameter can have the following values:
– idle. Was never estimated and not currently scheduled.
– scheduled. Volume is queued for estimation, and will be processed based on lowest
volume ID first.
– active. Volume is being analyzed.
– canceling. Volume was requested to cancel an active analysis, but the analysis was
not canceled yet.
– estimated. Volume was analyzed and results show the expected savings of thin
provisioning and compression.
– sparse. Volume was analyzed but Comprestimator could not find enough nonzero
samples to establish a good estimation.
– compression_savings_ratio. The compression saving ratio is the estimated amount of
space that can be saved on the storage in the frame of this specific volume expressed
as a percentage.
The analyzevdiskbysystem command provides an option to run Comprestimator on all
volumes within the system. The analyzing process is nondisruptive and should not affect
the system significantly. Analysis speed might vary due to the fullness of the volume, but
should not take more than a few minutes per volume. This command can be canceled by
running the analyzevdiskbysystem -cancel command.
The lsvdiskanalysisprogress command shows the progress of the Comprestimator
analysis, as shown in Example 9-12.
Example 9-12 Comprestimator progress
id vdisk_count pending_analysis estimated_completion_time
0 45 12 151012154400
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