On Tue, 2010-06-29 at 18:07 -0700, Aleksey Tsalolikhin wrote:
> Situation: two similar servers, both with CentOS 5.4 64-bit. Making
> an ext3 filesystem on one takes seconds, on the other minutes.
>
> Partition Size Server 1 Server 2
>
> 1 GB 0.7 sec 0.3 sec
>
> 4 GB 2.5 sec 1.2 sec
>
> 40 GB 15 sec 13 min
>
> WTF
>
> e2fsprogs RPM is e2fsprogs-1.39-23.el5 on both systems
> mkfs --version reports "util-linux 2.13-pre7" on both systems
> mkfs -V reports the same on both systems (mke2fs 1.3 (29-May-2006)
> Using EXT2FS Library version 1.39)
> file size on mkfs and mkfs.ext3 binaries is identical
>
> However, checksum on these binaries differs across servers, and "cmp"
> reports files are different
>
> I took "mkfs" and "mkfs.ext3" from server 1, put them on server 2, and
> got an improvement:
>
> 40 GB 15 sec 3 min
>
> Just out of curiousity, I ran "rpm -V e2fsprogs" to see if rpm would
> pick up the difference and sure enough, it complained mkfs.ext3
> changed.
>
> Both of these servers have CentOS 5.4; Server 1 was installed in Dec
> 2009, Server 2 in April 2010.
>
> I'd like to:
>
> (a) account for the difference in the binaries, and
> (b) see if something else is different that I can make the same to get
> the mkfs.ext3 time down to 15 sec on both systems.
>
> Solving (a) should shed light on (b). Any ideas?
----
I think the answer is in your original statement - 'two similar servers'
Similar says, not exactly and the hard drives, controller and RAID
configuration differences would be the first place to look for your
answer.
Craig
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