HP StorageWorks Scalable File Share - Manual (Page 166)

Verifying, diagnosing, and maintaining the system 6–36
2. On the second node in the test, enter the command shown in the following example:
# perf_main -a192.168.xx.xx
where
192.168.xx.xx
is the InfiniBand IP address of the first node in the test.
The output should be as follows:
********************************************
********* perf_main version 9.6 *********
********* CPU is: 3600.00 Mcps *********
********************************************
Using SL = 0
************* RC RDMA-Write BW Unidirectional Test started for port 1
*********************
************* RC RDMA-Write BW Unidirectional Test Finished for port 1
*********************
The first node in the test then resumes testing. The output should be as follows:
Using SL = 0
************* RC RDMA-Write BW Unidirectional Test started for port 1
*********************
BW: 771.0 MBytes/sec [size: 262144 bytes, iter: 1000, total 262144000]
************* RC RDMA-Write BW Unidirectional Test Finished for port 1
*********************
The raw bandwidth should be close to 770 megabytes per second with PCI-X 133MHz. If this is not
the case, see Section 9.25 for information on troubleshooting the Voltaire InfiniBand interconnect.
6.1.9 Client performance diagnostics
Several tools are provided in the HP SFS client packages to help you to diagnose performance problems.
You can verify individual components of the system sequentially and in parallel, and you can test the overall
performance of the system.
This section is organized as follows:
• Sequential OST service tests (Section 6.1.9.1)
• Parallel OST service tests (Section 6.1.9.2)
• Overall file system performance tests (Section 6.1.9.3)
6.1.9.1 Sequential OST service tests
The sequential interconnect test measures the read and write speeds to each OST service individually, to
ensure that each service is running at the expected speed. This test uses the
ost_perf_check.bash
command from the
hpls-diags-client
RPM file. (For full details of the
ost_perf_check.bash
command, see
the ost_perf_check
(8) manpage.)
The sequential test is run on one client node only. Before running the test, make sure that the file system is
correctly mounted and is mounted only on the single client node that will be used for the test. To ensure that
the test is reliable, unmount the file system from all client nodes that are not involved in the test so that they
are not able to use the file system in any way.