Re: Does \"32.1% non-contigunous\" mean severely fragmented?

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Fri, Oct 19, 2007 at 10:49:03AM +0900, Tetsuo Handa wrote:

> /data/VMware: 349/19546112 files (32.1% non-contiguous), 31019203/39072080 blocks
> 
> Does non-contiguous mean fragmented?
> If so, where is ext3defrag?

Not necessarily; it just means that 32% of your files have at least
one discontinuity.  Given the ext3 layout, by definition every 128
megs there will be a discontinuity because of the metadata at the
beginning of every single block group.  You have a small number of
files on your system (349) occupying an average of 348 megabytes.  So
it's not at all surprising that the contiguous percentage is 32%.

The recent Flex BG feature that was recently pulled into 2.6.23-git14
for ext4 is desgined to avoid this issue, but a seek every 128 megs is
for most workloads not a big deal and will hopefully not cause you any
problems.

							- Ted
-
To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html

[Index of Archives]     [Linux Ext4 Filesystem]     [Union Filesystem]     [Filesystem Testing]     [Ceph Users]     [Ecryptfs]     [AutoFS]     [Kernel Newbies]     [Share Photos]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux Cachefs]     [Reiser Filesystem]     [Linux RAID]     [Samba]     [Device Mapper]     [CEPH Development]
  Powered by Linux