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I/O performance B–3
SFS20 storage — 250GB disks
Table B-2 provides details of expected performance figures for one Object Storage Server in systems using
SFS20 storage. These figures are based on the following configuration:
SFS20 array firmware at Version 1.92.
One 2TB LUN per disk group (per array).
Infiniband interconnect for Lustre figures.
For ADG (also called RAID6) redundancy configurations:
One disk group consisting of eleven 250GB disks and a single spare disk.
For RAID5 redundancy configurations:
One disk group consisting of ten 250GB disks and a single spare disk.
In Table B-2, the second set of figures (2 LUNs) for each entry provides the data for a scenario where two
SFS20 arrays are simultaneously accessed.
Performance in systems using SFS20 storage may vary depending on the size of disk used in the array.
SFS20 storage — 5000GB disks
Table B-3 shows the Lustre performance of multiple clients to one Object Storage Server using a single
SFS20 array with 500GB disks.
These figures are based on the following configuration:
One disk group of eleven 500GB disks and one spare disk.
Two 2TB LUNs per disk group (that is, two 2TB LUNs per array).
This is the recommended configuration for 500GB disks, as described in Chapter 5 of the
HP StorageWorks Scalable File Share System Installation and Upgrade Guide.
Table B-2 Performance figures — SFS20 storage
Number of
arrays
Number of
LUNs accessed
Write (MB/sec) Read (MB/sec)
ADG RAID5 ADG RAID5
Raw Performance 1 1 90 130 200 200
22
1
1. One LUN per array.
200 250 390 390
Single-client Lustre
performance
(one client,
ost_perf_check
command)
1 1 90 130 240 240
22
1
190 250 380 370
Multi-client Lustre
performance
(eight clients, IOR utility)
1 1 90 125 200 190
22
1
185 250 380 370
Table B-3 Multi-client Lustre performance of 500GB disks
Number of arrays Number of LUNs
accessed
Number of clients Write (MB/sec) Read (MB/sec)
12860145
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