Re: What is fragment in ext3/4 ?

[Coly Li <colyli@gmail.com>]

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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:
>> 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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