2730/2730T/5730 Performance Comparison 20 May 2008. NDA Notification.
20 May 2008
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RAID 5 & 6 Sequential Write with 48 drives
5730’s storage controller processor accounts for the higher sequential write transaction performance both Active/Active and failed over. 5730 sustains between 150% and 220% higher write transaction performance than 2730T at deeper queued small block host request sizes.
RAID 5 & 6 Sequential READ with 48 drives
5730 controller read bandwidth is 800MB/s per controller versus 2730T peaking at 570MB/s. 5730 sustains 40% higher read throughput then 2730T at large block sizes.
The Active/Active 5730 read performance in the curve is limited by the four port FC host. 5730 Active/Active read performance can sustain 1600MB/s with multiple host systems accessing.
Active/Active Controller Random Read/Write
Drive numbers have a much larger affect on random performance. For reads there is almost a direct correlation between the total number of drives accessed and the total random transaction IOPS. The drive random access performance is the limiting factor for reads in general.
Writes top out at 48 drives. Additional drives won’t improve random write numbers. The limit becomes the controller processing and cache algorithm.
Sequential Reads/Writes for Active/Active (Throughput & IOPS)
The RAID50 VDisk in this configuration is 27-drives, with 3 sub-arrays of 9-drive RAID5.
In this test configuration two dual port host systems are connected through the switch to 5730. Each host accesses the 4 LUNs presented by the 5730 Active/Active RAID system. Each host issues a queue depth / LUN, therefore each LUN sees 2x the total queue depth of each host.