On Tue, Oct 21, 2003 at 08:45:09AM -0600, Ryan Kirkpatrick wrote:
> ...
> I have seen some posts to this list that expanding the on disk
> usage of a sparse file can be time consuming. But the strange part of this
> problem is that on one machine, these lockups are less than a second (a
> few hundred milliseconds), and on the other machine they are several
> seconds (10-40 seconds). The former machine is a P2-400 w/256MB RAM, and
> 30GB IDE HD. The latter machine is a Athlon 1.4GHz w/1GB RAM, and 3x36GB
> Ultra160 RAID5 (software) SCSI array. So, yes, the far faster machine is
> showing these lockups much worse than the slower machine. :(
I've seen on many other lists reports about IDE disks seeming to be much
faster than SCSI ones. It seems that they report success back to the
OS as soon as the write is in their buffer, instead of waiting till
it's in the disk. That may explain the difference in speed.
--
Rodrigo Gallardo
PGP Key ID: ADC9BC28
Fingerprint: 7C81 E60C 442E 8FBC D975 2F49 0199 8318 ADC9 BC28
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