read benchmarks: ufs/zfs/ext3 raidz/raid5

[peterjeremy at optushome.com.au]

On 2009-Jun-24 23:27:31 +0300, Dan Naumov <dan.naumov at gmail.com> wrote:
>Random Access reads, 5MB chunks:
>http://virtual.tehinterweb.net/livejournal/2009-06-22_zfs_diskperf/zfs-diskperf-untuned-5mb.png
>Random Access reads, 1MB chunks:
>http://virtual.tehinterweb.net/livejournal/2009-06-22_zfs_diskperf/zfs-diskperf-untuned-1mb.png
>Random Access reads, 5MB chunks (big list):
>http://virtual.tehinterweb.net/livejournal/raid_performance/raid-diskperf-5mb-all.png

These benchmarks are all fairly meaningless.  As a first order
approximation, all I/O to a Unix FS should be writes or you don't have
enough RAM for your application.  A more meaningful benchmark would
check writes or a read/write mix with ~90% writes.

-- 
Peter Jeremy
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