xfs
[Top] [All Lists]
<prev [Date] next>
[Advanced]
 <prev [Thread] next>

Re: Fastest Chunk Size w/XFS For MD Software RAID = 1024k

from [Justin Piszcz] [Permanent Link][Original]
To: Peter Rabbitson <rabbit@xxxxxxxxx>
Subject: Re: Fastest Chunk Size w/XFS For MD Software RAID = 1024k
From: Justin Piszcz <jpiszcz@xxxxxxxxxxxxxxx>
Date: Thu, 28 Jun 2007 04:27:15 -0400 (EDT)
Cc: linux-raid@xxxxxxxxxxxxxxx, xfs@xxxxxxxxxxx, Alan Piszcz <ap@xxxxxxxxxxxxx>
In-reply-to: <46837056.4050306@rabbit.us>
References: <Pine.LNX.4.64.0706271918010.29111@p34.internal.lan> <46832E60.9000006@rabbit.us> <Pine.LNX.4.64.0706280406520.1406@p34.internal.lan> <46837056.4050306@rabbit.us>
Sender: xfs-bounce@xxxxxxxxxxx 


On Thu, 28 Jun 2007, Peter Rabbitson wrote:

Justin Piszcz wrote: 
mdadm --create \
      --verbose /dev/md3 \
      --level=5 \
      --raid-devices=10 \
      --chunk=1024 \
      --force \
      --run
      /dev/sd[cdefghijkl]1

Justin.

Interesting, I came up with the same results (1M chunk being superior) with a completely different raid set with XFS on top:

mdadm   --create \
        --level=10 \
        --chunk=1024 \
        --raid-devices=4 \
        --layout=f3 \
        ...

Could it be attributed to XFS itself?

Peter


Good question, by the way how much cache do the drives have that you are testing with?

Justin.


[More with this subject...]
<Prev in Thread] Current Thread [Next in Thread>
Previous by Date:  PARTIAL TAKE 966972 - make sure the library link respects LDFLAGS, Barry Naujok
Next by Date:  TAKE 965902 - Add filestreams support to xfs_io, Barry Naujok
Previous by Thread:  Re: Fastest Chunk Size w/XFS For MD Software RAID = 1024k, Justin Piszcz
Next by Thread:  Re: Fastest Chunk Size w/XFS For MD Software RAID = 1024k, David Chinner
Indexes:  [Date] [Thread] [Top] [All Lists]