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Each disk shelf in the platform used for deep shelf testing was configured in the same manner

as described in “Benchmark Platform” (page 63). The arrangement of the shelves and controllers

was modified as shown in Figure A-10.

A.7.2 Single Stream Throughput

For a single stream, striping improves performance immediately when applied across the available

OSSs, but additional striping does not provide further benefit as shown in Figure A-11. Tests

performed with a single process (on a single client) are limited by the throughput capabilities of

the process and the client connection.

Figure A-11 Stripe Count Versus Total Throughput (MB/s)

When single striped files are used in the deep shelf system, overall system throughput improves

with the number of clients in a scalable manner. Configuring files with more than one stripe

tends to increase interference when simultaneously accessing those files. The more files accessed,

the greater the interference.

With single striped files, performance scales well for at least a number of clients up to and

including the number of available OSTs. See Figure A-12.

A.7 DDR InfiniBand Performance Using MSA2312 with Three Attached JBODs 71

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Hp StorageWorks Scalable File Share Manuale Utente Pagina 71