filesystem: 12h to delete 32GB of data
benjamin at seattlefenix.net
Wed May 6 17:16:21 UTC 2009
Wojciech Puchar wrote:
>> means you had 6 million files. df -i would have been more useful in
>> the output above.
>> This brings a number of questions up:
>> * Are you _sure_ softupdates is enabled on that partition? That's
> he showed mount output - he has softdeps on.
>> * Are these 7200RPM disks or 15,000? Again, going to make a big
> on 7200 RPM ordinary SATA disk i deleted 15 million files taking 300GB
> (squid cache) in less than 30 minutes.
> for sure it's because of his "hardware raid".
> i've NEVER seen "hardware raid" that is actually faster than non-raid
> config, or gmirror/gstripe config.
> usually it's far much slower
Sorry, but my experience with that very server using a P400 controller
with 256MB write cache is very different. My benchmarks showed that
controller using Raid5 (with only 4 disks) is significantly faster than
The days when hardware controllers could automatically be considered
slow are long gone. The hardware does get faster over time. Don't make
any assumptions without doing benchmarks.
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