Mike Jakubik wrote:
Mark Kirkwood wrote:
Mark Kirkwood wrote:
I recently upgraded my FreeBSD machines from 6.0R to 6.1-STABLE
I noticed a pleasant surprise - improved disk IO!
In 6.0R best sequential throughput I ever saw was 170 MB/s (32k block
size reads on an 4G file). In 6.1-STABLE I'm seeing 190 Mb/s (32k
block size reads on an 4G file).
Would have been even better if I'd spelled "sequential" correctly in
the subject :-(...
I'm also seeing sequential write speed increasing from 120Mb/s to
140Mb/s.
I did wonder if this increased IO throughput is what is triggering the
posts about data corruption in 6.1 - i.e. more throughput means more
heat to dissipate!
Or, maybe the file was in a different location on the disk. Outer and
inner tracks perform differently. Did you test with the same exact file
and the same file system?
Good point, but yes - I made sure that a pre-existing file was used for
the *read* test.
About the *write* test - I am mistaken unfortunately, as I found some
old test results showing 137Mb/s, I conclude that 140Mb/s is not
significantly different from that!
Cheers
Mark
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