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Date: Fri, 03 Aug 2007 17:15:52 +0800 From: Coly Li <colyli@...il.com> To: Andreas Dilger <adilger@...sterfs.com> CC: linux-ext4@...r.kernel.org Subject: Re: What is fragment in ext3/4 ? -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 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. > -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (GNU/Linux) Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org iD8DBQFGsvJIuTp8cyZ5lTERAltpAJ9BhpdjoKQUx001KSQP2oR8HNaXsQCZAbyJ ASnxX0wXDEaU8q5Syvp83yk= =IYRx -----END PGP SIGNATURE----- - To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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