Investigating a degradation in the performance of a storage pool

You can use the Compare Performance of One Pool over Time Ranges report to analyze a change in the performance of a storage pool. You can also use this scenario to compare the performance metrics of storage systems, switches, and switch ports over two periods of time.

In the previous three days, the performance of a storage pool has significantly degraded. You want to investigate the reasons for the degradation. To do this, use the Compare Performance of One Pool over Time Ranges report to compare the recent poor performance of the pool with a period when the performance was normal.

  1. Go to the URL for your Cognos® Analytics server. The format of the URL is similar to this URL: http://myhostname:9300/bi
  2. In the Welcome portal, click Team Content.
  3. Click IBM Spectrum Control Predefined Reports.
  4. Click Storage Systems, and then click Pools.
  5. Click Compare Performance of One Pool over Time Ranges.
  6. Specify the storage system and the pool whose performance has degraded.
  7. Specify the performance metric that you want to analyze, for example Overall Response Time (ms/op).
  8. Specify an interval.
  9. Specify two custom date ranges for the two reporting periods. Specify the previous three days as one reporting period. For the other reporting period, specify a period when the performance of the pool was normal.
  10. Click Finish.
To investigate other possible reasons for the degradation, run the report again, and select another metric.