From: Helge Hafting <helge.hafting@aitel.hist.no>
To: Kyle Moffett <mrmacman_g4@mac.com>
Cc: Xin Zhao <uszhaoxin@gmail.com>, linux-kernel@vger.kernel.org
Subject: Re: Ext3+ramdisk journaling problem
Date: Wed, 27 Apr 2005 11:18:58 +0200 [thread overview]
Message-ID: <426F5902.6060901@aitel.hist.no> (raw)
In-Reply-To: <cba141443b50f44069d7a92093a0d270@mac.com>
Kyle Moffett wrote:
> On Apr 24, 2005, at 21:22, Xin Zhao wrote:
>
>> hi,
>>
>> I used ramdisk as an ext3 journal and mount ext3 file system with
>> option data=journal. It worked fine and speedup the ext3 file system.
>
>
> Uhh, the whole point of a journal is that when the computer goes down
> hard and doesn't have a chance to clean up. If you put the journal on
> a ramdisk, you might as well just mount it as an ext2 filesystem and
> be done with it. Without the journal _on_disk_ you get no data or
> filesystem reliability advantages. If you're after speed, just forgo
> the reliability or buy better disks.
>
Alternative: Buy a real ramdisk with battery-backup instead of using
a "ramdisk" in system ram. Such a thing will last across a reboot,
offering both nice speed and all the comforts of a journal.
Helge Hafting
prev parent reply other threads:[~2005-04-27 9:14 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-25 1:22 Ext3+ramdisk journaling problem Xin Zhao
2005-04-25 2:30 ` Kyle Moffett
2005-04-27 9:18 ` Helge Hafting [this message]
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