p.heinlein at heinlein-support.de
Tue Nov 8 15:50:25 EET 2011
I have > 11 TB hard used Mailstorage, saved als maildir in ext3 on HP EVA.
I always wanted to make some mesurements about several influences to the
performance (switch to ext4, switch to mdbox), but I never had enough time
to do that.
At the moment I *need* more speed, we have too much waitI/O on the system
and I already used all other performance and tuning-tricks (separated cache,
noatime, fsync and all that stuff).
I have to change my setup, maybe somebody else here have hard facts:
*) Is ext4 faster? How much faster?
*) Is it faster because of the ext4 kernel-module (which can be used on ext3
to) or because of the ext4 filesystem layout?
*) Is mdbox really faster? I'd like to have mdbox to have better performance
in running my backup-processes. But does it bring some performance boosts
Thanks for any hints an tricks,
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