From: Daniel Keisling (daniel.keisling@austin.ppdi.com)
Date: Fri Jan 25 2008 - 12:37:21 EST
Hello,
Is the default block size of 8192 on HP-UX vxfs filesystems connected to
a SAN (specifically an EVA5000) okay for performance reasons? My
rp4440's can't seem to read more than 14MB/s and I'm having trouble
finding the cause. This has a dual-pathed 2GB fibre on two HBA cards
using SecurePath (latest version) with the LST load balanced policy
running HP-UX 11i. CPU, memory, and SCSI queue depth seem fine. I/O
throughput just seems slow. Other machines (Windows) can read up to
40MB/sec and seem to have great performance.
Is there something I'm missing or is this inline with what other people
see? From attending multiple StorageWorks events, I hear HP touting way
higher I/O throughput numbers that what I can get.
TIA,
Daniel
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