xfs
[Top] [All Lists]

Re: Problem repairing filesystem

To: Steve Lord <lord@xxxxxxx>
Subject: Re: Problem repairing filesystem
From: Simon Matter <simon.matter@xxxxxxxxxxxxxxxx>
Date: Thu, 15 Aug 2002 09:13:24 +0200
>received: from mobile.sauter-bc.com (unknown [10.1.6.21]) by basel1.sauter-bc.com (Postfix) with ESMTP id 50FFC57306; Thu, 15 Aug 2002 09:13:25 +0200 (CEST)
Cc: Paul Schutte <paul@xxxxxxxx>, Seth Mos <knuffie@xxxxxxxxx>, XFS mailing list <linux-xfs@xxxxxxxxxxx>
Organization: Sauter AG, Basel
References: <4.3.2.7.2.20020814140949.03bba840@pop.xs4all.nl> <3D5A5D5D.AEE17BD8@up.ac.za> <3D5A736B.99998201@ch.sauter-bc.com> <1029339359.18361.36.camel@jen.americas.sgi.com>
Sender: owner-linux-xfs@xxxxxxxxxxx
Steve Lord schrieb:
> 
> On Wed, 2002-08-14 at 10:12, Simon Matter wrote:
> > Paul Schutte schrieb:
> > >
> > > Seth Mos wrote:
> > >
> > > > At 12:31 14-8-2002 +0200, Paul Schutte wrote:
> > > > >Background:
> > > > >----------------
> > > > >
> > > > >I ran a ftp server on a pentium II 333Mhz with 256M RAM, using the
> > > > >2.4.9-31-xfs kernel.
> > > > >Used 4 x 120 Gb IDE drives in a RAID 5 array on an Adaptec 2400 
> > > > >hardware
> > > > >raid controller.
> > > > >There is a 4Gb root partition and a +/- 320Gb data partition.
> > > > >
> > > > >One of the drives failed and the machine crashed.
> > > >
> > > > Adaptec is not known for there quality of the raid drivers. aacraid 
> > > > comes
> > > > to mind. I suggest using software raid instead. I like software raid.
> > > >
> > >
> > > software RAID5 with internal log using  postmark v1.5
> > > Time:
> > >         6186 seconds total
> > >         5840 seconds of transactions (17 per second)
> > >
> > > Files:
> > >         60125 created (9 per second)
> > >                 Creation alone: 10000 files (121 per second)
> > >                 Mixed with transactions: 50125 files (8 per second)
> > >         50110 read (8 per second)
> > >         49822 appended (8 per second)
> > >         60125 deleted (9 per second)
> > >                 Deletion alone: 10250 files (38 per second)
> > >                 Mixed with transactions: 49875 files (8 per second)
> > >
> > > Data:
> > >         3113.25 megabytes read (515.35 kilobytes per second)
> > >         3731.11 megabytes written (617.63 kilobytes per second)
> > >
> > > hardware raid5 using postmark v1.5:
> > > Time:
> > >         749 seconds total
> > >         709 seconds of transactions (141 per second)
> > >
> > > Files:
> > >         60125 created (80 per second)
> > >                 Creation alone: 10000 files (416 per second)
> > >                 Mixed with transactions: 50125 files (70 per second)
> > >         50110 read (70 per second)
> > >         49822 appended (70 per second)
> > >         60125 deleted (80 per second)
> > >                 Deletion alone: 10250 files (640 per second)
> > >                 Mixed with transactions: 49875 files (70 per second)
> > >
> > > Data:
> > >         3113.25 megabytes read (4.16 megabytes per second)
> > >         3731.11 megabytes written (4.98 megabytes per second)
> >
> > Hmm, tell me if I'm wrong but I'm quite sure you were using software
> > RAID5 with internal log. Use external log with this kernel
> > (2.4.9-31-xfs) and you'll see a big difference! I'm running 2.4.9-34-xfs
> > on software RAID5 on a DELL server with hardware RAID.
> >
> > Simon
> >
> 
> So have any of you folks tried V2 logs with striping on a software raid,
> it should fix the performance there.

Not yet, sorry, I don't have much ressources (hardware/time) to test
these days.

Simon

> 
> Steve
> 
> --
> 
> Steve Lord                                      voice: +1-651-683-3511
> Principal Engineer, Filesystem Software         email: lord@xxxxxxx



<Prev in Thread] Current Thread [Next in Thread>