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Disable journaling

To: xfs@xxxxxxxxxxx
Subject: Disable journaling
From: Iuri Diniz <iuridiniz@xxxxxxxxx>
Date: Mon, 26 Jan 2009 23:23:23 -0200
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BACKGOUND:
I'm looking for a filesystem for linux with these features:

* Fast Sequential Read (FSR)
* Optional: copy on write support (COW)

I think that Ext4 and XFS are the best options. (ZFS too, but current ZFS
implementation is not GPL, maybe brtfs when ready).

why do I want this? because I have a SSD.FSQ will reduce the boot time and
COW will reduce writes on the same sector while allowing snapshots

I've found that XFS has a FSQ support (good job)[1], so I it will be very
fast on SSD (random read == sequential read).

FAIK xfs doesn't support COW, it's ok because ext4 doesn't too.

MY PROBLEM:

I know that my SSD drive supports wearing level on hardware, but anyway I
want to reduce unnecessary writes on my device, so I want to disable
journaling on my filesytem.

Maybe, the ext4 (like ext3 does) will support it by doing this:

tune2fs -O ^has_journal /dev/sda1

Is possible to disable journaling on XFS too?

Thanks in advance

[1] http://www.phoronix.com/scan.php?page=article&item=ext4_benchmarks&num=4

-- 
Iuri Diniz
http://iuridiniz.com [Sou um agitador, não um advogado]
http://blog.igdium.com [Linux on Limbo]


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