linux-ext4 - Re: Default size of journal?

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Message-ID: <4B4B0D8C.4030209@att.net>
Date:	Mon, 11 Jan 2010 06:37:48 -0500
From:	Jeff Layton <laytonjb@....net>
To:	Andreas Dilger <adilger@....com>
CC:	linux-ext4@...r.kernel.org
Subject: Re: Default size of journal?

Andreas Dilger wrote:
> On 2010-01-10, at 15:12, Jeff Layton wrote:
>> I'm sorry if this is a repeat, but I was wondering what the
>> default journal size is for ext4  when it's built on a single
>> partition? Or does it vary in size as needed?
>
> It varies with the size of the filesystem.  I believe the largest 
> default size is 128MB, but I don't know offhand what the cutoff size is.

Is there a simple formula for how the journal size varies with the
file system size? Perhaps linear?

Thanks!

Jeff

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