linux-ext4 - Re: What is fragment in ext3/4 ?

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Message-ID: <46B35260.9000900@redhat.com>
Date:	Fri, 03 Aug 2007 11:05:52 -0500
From:	Eric Sandeen <sandeen@...hat.com>
To:	Andreas Dilger <adilger@...sterfs.com>
CC:	Coly Li <colyli@...il.com>, linux-ext4@...r.kernel.org
Subject: Re: What is fragment in ext3/4 ?

Andreas Dilger wrote:
> On Aug 02, 2007  17:55 +0800, Coly Li wrote:
>> These days, when I read the source code of mke2fs, I found an option -f
>> to set the fragment size.
>>
>> But I can not find any explaining for ext3/4 framgment from google,
>> excepting someone saying ext2/3 does not support this feature.
>>
>> Can anyone tell me what is the function or purpose of fragment of ext
>> file system ?
> 
> This is an obsolete concept from BSD that was never used by ext[234].
> Consider a "fragment" in this context to be the same as a "tail" for
> reiserfs.  A very small file, or the end of a file that is less than
> a block.

There's a fair amount of code around this never-implemented concept;
should it be removed?  :)

-Eric
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