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#1 2006-09-27 13:05:04

mmccaskill
Member
From: NC
Registered: 2005-02-21
Posts: 163

JFS performance tips?

I recently reinstalled Arch on my work laptop (was using Debian since all the other Linux boxes are Debian) but I got tired of the compliated stuff. I just wanted pacman back.

Anyway I reinstalled with JFS and I've noticed it is much slower than ext3. Aside from reinstalling again but with ext3, are there any tips for making JFS any faster?

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#2 2006-09-27 16:31:18

test1000
Member
Registered: 2005-04-03
Posts: 834

Re: JFS performance tips?

Maybe pacman is slow with JFS; just like it is slow with xfs. But I don't think the whole system is slow with JFS. You could make just the /var/lib/pacman/ dir into a ext3 dir. There's even a script to do it in user contributions forumsection.


KISS = "It can scarcely be denied that the supreme goal of all theory is to make the irreducible basic elements as simple and as few as possible without having to surrender the adequate representation of a single datum of experience." - Albert Einstein

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#3 2006-09-29 01:45:32

Gullible Jones
Member
Registered: 2004-12-29
Posts: 4,863

Re: JFS performance tips?

Pacman is significantly slower with ext3 than with JFS due to different management of small files, in my experience. Not sure about performance with other stuff, it seems about the same to me but I am using a desktop with a fast (7200 RPM, UDMA 133) hard drive, so there could be performance issues that don't show. At any rate, JFS doesn't seem very tweakable.

One question though... Are you mounting your partitions with the noatime option?

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#4 2006-10-10 02:09:30

mmccaskill
Member
From: NC
Registered: 2005-02-21
Posts: 163

Re: JFS performance tips?

Sorry for the delay. Yes I am mounting them with noatime. I also read about how it is faster to mount them with data=journal so I've been doing that as well.

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#5 2006-10-10 06:46:19

byte
Member
From: Düsseldorf (DE)
Registered: 2006-05-01
Posts: 2,046

Re: JFS performance tips?

Ext3 has some funny cases where data=journal shines, but it's obvious from its description that this is the slowest of the three modes.
I'm using JFS as my main filesystem (Ext2 on /boot, Ext3 on external hdd) since I started using Linux, mostly because it's 'modern' compared to Ext3 and not so self-obsessed as Reiser or XFS with dozens of utilities and tweaking options. I also heard it should provide for lower cpu usage than others.


1000

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