Release Notes

37 Analyzing Dell PS Series Storage with SAN Headquarters | TR1050
3.1.4 Example 1: After merging pools
Merging the two pools simply allows the PS Series to virtualize all of the volumes across the aggregate spindles. The PS
Series will move data appropriately based on capacity between the resulting members. Typically, this is the simplest
method.
Notice the results are similar to moving the volumes to separate pools.
Figure 24 Results after merging the two pools. Latency is below 20ms and IOPS increased to over 7000.
3.1.4.1 Example 1 - Over utilized pool analysis: Conclusion
This example touched on several key concepts for performance analysis and resolution. First we analyzed the array and
determined the disks in the pool are over utilized. Then we used some common techniques to help alleviate the
problem. The first method involved moving volumes while the second method simply takes advantage of the PS
architecture by simply merging two separate pools together.
Manually moving the volumes to a new pool is a more deliberate method which allows the administrator to control
where the volumes are placed. This method may be appropriate to meet business objectives. For instance, a marketing
department that funded the additional array wants the isolation guaranteed. The second method of merging members