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Message-Id: <1179770459.23003.7.camel@localhost.localdomain> Date: Mon, 21 May 2007 11:00:59 -0700 From: Mingming Cao <cmm@...ibm.com> To: Eric <erpo41@...il.com> Cc: linux-ext4 <linux-ext4@...r.kernel.org> Subject: Re: files mapped funny? (related to online defragmentation) On Mon, 2007-05-21 at 06:49 -0700, Eric wrote: > Hi, > > I'm getting strange results when I map out the blocks used in files > larger than a several thousand KB. I never seem to get any more than > 1024 contiguous data blocks in a row. > > Here's a portion of the output of my script when I run it on a 176MB > file in my home directory: > ... > Contiguous chunk 67: 2385568 - 2385591 (24 blocks) > Contiguous chunk 68: 2385608 - 2386448 (841 blocks) > Contiguous chunk 69: 2386450 - 2387473 (1024 blocks) > Contiguous chunk 70: 2387475 - 2388498 (1024 blocks) > Contiguous chunk 71: 2388500 - 2389523 (1024 blocks) > ... > > Maybe this is a bug in my script? Can anyone explain why this would > happen? > filefrag command comes with e2fsprogs will print the file fragmentation info. I guess you can try filefrag -v command and see if that matches what your scripts reported. Mingming > I'm attaching my script in case other ext2/3/4 newbies can get any use > out of it, and in case anyone needs to see it in order to answer my > question. It's pretty self-explanatory, though. > > Cheers, > > Eric > - 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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