User`s guide

ISR654606-00 A 6-1
6 Performance
This chapter discusses the factors affecting DMS performance and offers
suggestions for obtaining maximum performance.
Performance Factors
DMS provides maximum throughput of 1TB (one terabyte) per hour. The migration
performance depends upon several factors, including:
 Number of concurrent migration jobs running on the MPX200
 I/O size used for data transfer
 I/O traffic serviced by the array from other applications active during data
migration
 Fibre Channel link speed
 RAID configuration of LUNs
Maximizing Performance
Suggestions for maximizing performance include the following:
 Use the Array Bandwidth feature (see “Setting Array Properties” on
page 3-2) to make sure that the MPX200 is not using all available
bandwidth, because bandwidth is needed for other LUNs still servicing
applications.
 Use Serial Scheduling of migration jobs (see “Using the Data Migration
Wizard” on page 3-7) instead of simultaneously starting all jobs.
 The MPX200 is capable of simultaneously configuring a maximum of 256
jobs. However, QLogic recommends that you simultaneously run only four
and eights jobs. The remaining jobs can be scheduled using Serial
Scheduling or Delayed Scheduling.
 LUNs belonging to different RAID groups (set of physical drives) or on a
different array controller on the storage array should be scheduled to run
simultaneously.