In Unisphere for PowerMax 9.0 and PowerMax O/S 5978 we introduced a new feature called Storage Group Real Time which allows customers a more granular view of their performance data on the array.
Traditionally we offer the ability to view System wide performance data at the director level at 5 seconds but this new ability refers to the SG level whereby we can now see data at 30 second intervals rather than 5 minutes. This enhanced ability gives you the ability to more easily identify performance spikes as they occur.
There are certain caveats in order to use SG Real Time:
Unisphere for PowerMax 9.0 Required
PowerMax O/S 5978
1 Array at a time can be monitored per Unisphere Instance.
Maximum of 5 SG’s at a time
Limited set of KPI Metrics (Host I/O’s/Sec, Host MB’s/Sec, Host Reads/Sec, Host Writes/Sec, Read RT (ms), Response Time (ms), Write RT (ms).
To begin let’s see how we register an array for SG Real Time, we go to Settings:
To register the array select Performance>System Registrations. You can see in the 4th column we have SG Real Time enabled on array 0156 as it is running the level of code required. By selecting the icon “Real Time Storage Groups” we can make our selection of what 5 SG’s we wish to monitor.
Presently we are monitoring 2 SG’s and if required we can 3 more if required.
Now let’s go to the charting section to see how it works in practice:
In the new chart section you can see we have called our chart RT1 and specified the last hour. In terms of objects we have selected Storage Groups and then we select the SG we can to chart on. Finally we have 7 KPI metrics of which we have chosen 3 here to draw our chart on.
Here on the X axis you can see how the time values are reduced down to minutes and we can get finer granularity as required if we are in troubleshooting mode.