534 IBM Midrange System Storage Hardware Guide
Throughput performance
The second set of results show the throughput comparison. The arrays were set up in the
following configurations:
SSD: 4 x (4+1) volumes in a RAID 5 configuration
FC: 16 x (8+1) volumes in a RAID 5 configuration
SATA: 16 x (8+1) volumes in a RAID 5 configuration
Figure C-5 Throughput performance comparison
SDD summary
From the comparisons given in Figure C-4 on page 533 and Figure C-5, SSD offers a greatly
improved performance over HDDs, but SSD costs more. With such a performance, SDD
usage can be increasingly justified for use in high performance tiered storage on a DS5000
storage subsystem. Also, SDD usage will be cost driven, and as the cost for SDD diminishes
to only two to three times the price of high-performance HDDs, it will drive a significant
substitution rate of low-capacity/high-performance HDDs.
DS5000 – Comparison of Throuput Performance
RAID 5
512K sequential reads
SSD Measured
6000
FC Measured SATA Measured
4000
2000
2000
512K sequential writes – write
cache enabled, mirroring disabled
512K sequential writes – write
cache enabled, mirroring enabled
To Next Page
Loading...
Need help?
General