Re: Linux 2.6.29
From: Eric Sandeen
Date: Tue Mar 24 2009 - 14:44:30 EST
Mark Lord wrote:
> Theodore Tso wrote:
>> So the question is how quickly can you *dirty* 1.6GB of memory?
> ..
>
> MythTV: rm /some/really/huge/video/file ; sync
> ## disk light stays on for several minutes..
>
> Note quite the same thing, I suppose, but it does break
> the shutdown scripts of every major Linux distribution.
It is indeed a different issue. ext3 does a fair bit of IO on a (here
60G file) delete:
http://people.redhat.com/~esandeen/rm_test/ext3_rm.png
ext4 is much better:
http://people.redhat.com/~esandeen/rm_test/ext4_rm.png
> Simple solution for MythTV is what people already do: use xfs instead.
and yes, xfs does it very quickly:
http://people.redhat.com/~esandeen/rm_test/xfs_rm.png
-Eric
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