Journaling UFS with gjournal.
scottl at samsco.org
Tue Jun 20 20:33:11 UTC 2006
Mike Jakubik wrote:
> Xin LI wrote:
>> 在 2006-06-20二的 21:36 +0200，Pawel Jakub Dawidek写道：
>>> The performance impact is big for large files, because in theory we have
>>> to write the data twice.
>>> Yes, it eliminates need for SU, but there are reasons, that you still
>>> want to use SU, eg. for snapshots.
>> Em... IIRC SU and snapshots are independent, no?
> What about mounting the filesystem async though? It was my understanding
> that the Linux filesystems were much faster in benchmarks because they
> were mounted async by default, however the presence of journaling
> allowed this safely. Is this the case here too?
Yes, async mounting is much faster that sync mounting, and slightly
faster than SU, except when SU is dealing with huge data sets. Then
async is significantly faster.
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