Collecting required Logs for Performance Analysis on CLARiiON or VNX.

                              Performance Service Requests will not be fully investigated until both the SPCollects and NAR (or NAZ) files are available and a detailed description of the symptoms has been provided.  The SPCollects have the configuration and fault information for the CLARiiON and the NAR files have the performance data.  The detail of the performance issue symptoms is also needed so that the engineer will know which period needs to be analyzed in detail and the LUNs that had the noticeable performance impact.  Without this detail, only the general performance statistics will be analyzed to look at issues affecting all LUNs.

Customer Support Services investigate performance cases to identify issues that are affecting customer sites.  Performance tuning (to achieve peak performance for a host or application) and reconfiguration is a task for a Storage Administrator or a Solutions Architect so this will not be handled in the Service Request. Performance issues can have a number of causes including hardware faults, forced flushing (caused by write cache being 100% full), head contention (several busy LUNs sharing the same drives), or the storage array being at its maximum utilization.

Please refer to Primus article “emc161922” for more information on Performance analysis on VNX and CLARiiON array.