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RE: blocksize question

To: "'Eyal Lebedinsky'" <eyal@xxxxxxxxxxxxxx>, "'linux-xfs list'" <linux-xfs@xxxxxxxxxxx>
Subject: RE: blocksize question
From: "Mike Young" <myoung@xxxxxxxxxxxxxxxxxxx>
Date: Wed, 31 Dec 2003 07:57:58 -0800
In-reply-to: <3FF2C9D8.A96CA7CD@eyal.emu.id.au>
Sender: linux-xfs-bounce@xxxxxxxxxxx
Thread-index: AcPPnvw6PjEmBPK/TnytLLTCfaojCgAF7Wkw
Hi Eyal,

I'm currently doing some performance testing with 3Ware and some other RAID
options on SuSE 9.0 and using XFS.  What kind of performance are you seeing?
And what tests are you using?

-Mike

-----Original Message-----
From: linux-xfs-bounce@xxxxxxxxxxx [mailto:linux-xfs-bounce@xxxxxxxxxxx] On
Behalf Of Eyal Lebedinsky
Sent: Wednesday, December 31, 2003 5:07 AM
To: linux-xfs list
Subject: blocksize question

We have an 8 disk RAID-5 on 3ware setup at the office. The whole
disk (/dev/sda) is xfs.

We notice that the performance is not that hot, and one thing
we are looking at is the block size. XFS says it is 4096:

=======================================
[root@ssa18 ~]# xfs_info /backup
meta-data=/backup                isize=256    agcount=268,
agsize=1048576 blks
         =                       sectsz=512
data     =                       bsize=4096   blocks=280149632,
imaxpct=25
         =                       sunit=0      swidth=0 blks, unwritten=1
naming   =version 2              bsize=4096
log      =internal               bsize=4096   blocks=32768, version=1
         =                       sectsz=512   sunit=0 blks
realtime =none                   extsz=65536  blocks=0, rtextents=0
=======================================

At the same time we see:

=======================================
[root@ssa18 ~]# blockdev --getbsz /dev/sda
512
=======================================

Is this how it is supposed to be?

--
Eyal Lebedinsky (eyal@xxxxxxxxxxxxxx) <http://samba.org/eyal/>





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