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Date: Tue, 06 Sep 2011 22:55:24 +0400
From: Permjacov Evgeniy <permeakra@gmail.com>
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Subject: Re: [gentoo-user] Filesystem with lowest CPU load, acceptable emerge
 performance, and stable?
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On 09/06/2011 09:26 PM, Pandu Poluan wrote:
> So, can anyone recommend me a filesystem that fulfills my following needs:
>
> Scenario: vFirewall (virtual Firewall) that is going to be deployed at
> my IaaS Cloud Provider.
>
> Disk I/O Characteristic: Occasional writes during 'normal' usage,
> once-a-week eix-sync + emerge -avuD
>
> Priority: Stable (i.e., less chance of corruption), least CPU usage.
>
> My Google-Fu seems to indicate either XFS or JFS; what do you think?
>
> Rgds,
>
>
The best fs for emerge is tmpfs on TMP_PORTDIR. I run box with tmpfs on
both /var/tmp and /tmp and happy with it -)

For fs CPU usage is nothing, IO usage is a real problem and weak point.
Thus, you are free to choose any fs with full journaling. ext3 allows
full journaling as option, as well as ext4 and ext4 is little faster if
tuned properly. JFS/XFS journals metadata only. Remember that journaling
makes writes (i.e. emerge) a bit slower.