Thread (6 messages) 6 messages, 3 authors, 2007-08-03

Re: What is fragment in ext3/4 ?

From: Coly Li <hidden>
Date: 2007-08-03 09:21:29

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I read from manual and source code, it seems fragment size should be
same to filesystem block size. Therefore, can I say current ext3/4
filesystem still do not support fragment ?

Thanks.

Coly


Andreas Dilger wrote:
On Aug 02, 2007  17:55 +0800, Coly Li wrote:
quoted
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.

Cheers, Andreas
--
Andreas Dilger
Principal Software Engineer
Cluster File Systems, Inc.
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