[CentOS] 3Ware 9550SX and latency/system responsiveness
feizhou at graffiti.net
Fri Sep 14 09:34:21 UTC 2007
Simon Banton wrote:
>> Hmm, how are you creating your ext3 filesystem(s) that you test on?
>> Try creating it with a large journal (maybe 256MB) and run it in full
>> journal mode.
> The filesystem was created during the initial CentOS installation, and
> I've tried it with ext2 which made no difference.
The journal size was probably 32MB then. A 128MB or larger journal in
full journal mode on a 3ware card with a BBU write cache should make a
big difference because fsync calls will now return OK as soon as it hits
the write cache....oh....do you have a BBU for your write cache on your
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