The four drives used in the striping tests were reconfigured as a RAID-5 volume. The stripe unit size was configured at 16KB, the default for both products. This configuration was tested with both SDS and Volume Manager TM . Back to Top 3. Each series of test results is reported below in a pair of tables.
All graphs depict the throughput measurements.
The following test results compare raw disk performance to Volume Manager TM performance, measured against a single 1.05GB SSA disk. There were no significant differences in performance observed between raw disk partitions and encapsulated volumes. These tests measure performance of Volume Manager TM and SDS on mirrored devices, using disks on two separate SSA trays and SCSI ports. On random tests and sequential write tests, Volume Manager TM and SDS performance figures are similar. For sequential reads, however, a difference between Volume Manager TM and SDS round-robin algorithms yields higher Volume Manager TM performance.