Date: Tue, 14 Apr 1998 12:49:03 -0700 From: Brandon Huey <brandon@epigram.com> To: freebsd-questions@FreeBSD.ORG Subject: RAID performance/benchmarking Message-ID: <3533BDAF.A8588F53@epigram.com>
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**cross-posted in freebsd-scsi
Dell PowerEdge 4200/300, 96MB RAM, 3 9GB Seagate Barracuda SCA drives
DPT PM3334UW w/64MB cache
FreeBSD 2.2.6
DPT kernel options: DPTOPT
DPT_MEASURE_PERFORMANCE
DPT_FREELIST_IS_STACK
i created an array group with the dos util 'dptmgr' from default
settings.
using IOZONE and Bonnie, i create a 128MB file for read/write
benchmarking.
i am aware of the performance implications of RAID-5, but I am getting
about 2MByte/sec max write transfer rate compared with 19MByte/sec on
reads.
For a pci ultrawide controller, are these figures suspect? What kind of
write performance hit should one expect w/RAID-5 ?
Thanks,
-bh
--
Brandon Huey Epigram, Inc.
bh@epigram.com +1 408 720 3027
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