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RE: [linux-lvm] LVM System



Well, thats possible. The best thing to do is run
benchmarks (I like iozone) on the proposed
system and see what works best.
The tests I did were just on small filesystems (1G volumes,
64M, 128M and 196M RAM). Filesizes I tested were only
up to 500M or so.
I found that while most tested filesystems (reiser, XFS,
ext3 and vfat) did drop off in performance as filesize
increased, XFS dropped off the most rapidly in that
dimension. ext3 was the most stable (in performance as filesize
increased), though its small filesize performance was the worst.
XFS looked like kinda the opposite!
:)
Reiser had the worst write performance of all of them,
but admirable read.

YMMV.



> -----Original Message-----
> From: linux-lvm-admin sistina com [mailto:linux-lvm-admin sistina com]On
> Behalf Of Anthony W. Marino
> Sent: Tuesday, 5 March 2002 12:50 p.m.
> To: linux-lvm sistina com; Steve Wray
> Subject: Re: [linux-lvm] LVM System
> 
> 
> On Monday 04 March 2002 06:39 pm, Steve Wray wrote:
> > I'd recommend ext3 with data journalling for sensitive
> > filesystems. Its slower than XFS but (seems to) scale better with
> > striping and large files. XFS performance (seems to) fall off
> > very rapidly as file size exceeds buffer size.
> >
> > XFS only journals metadata. So on event of a crash,
> > the filesystem structure will (likely) be sound, but theres
> > no guarantee that the data blocks will be uncorrupted!!!
> >
> > XFS is very nice tho, in that volumes and filesystems can
> > be grown with no downtime at all (without even unmounting).
> >
> > You might want to do some benchmarking before committing
> > to a build (thats recently saved my butt actually).
> 
> It was recommended to me that all large file systems have best 
> performance 
> with XFS.
> 
> > > -----Original Message-----
> > > From: linux-lvm-admin sistina com 
> [mailto:linux-lvm-admin sistina com]On
> > > Behalf Of Anthony W. Marino
> > > Sent: Tuesday, 5 March 2002 10:39 a.m.
> > > To: linux-lvm sistina com
> > > Subject: [linux-lvm] LVM System
> > >
> > >
> > > Any thoughts or articles that would be usefull in determining 
> the quality
> > > on the following combination would be greatly appreciated:
> > >
> > > LVM 1.x
> > > 3Ware 7800 Raid Controller
> > > Maxtor 40GB harddrives
> > > XFS Journalling FS
> > > SuSE 2.4.18+ Linux
> > >
> > >
> > > Thank You,
> > > Anthony
> > >
> > > _______________________________________________
> > > linux-lvm mailing list
> > > linux-lvm sistina com
> > > http://lists.sistina.com/mailman/listinfo/linux-lvm
> > > read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html
> >
> > _______________________________________________
> > linux-lvm mailing list
> > linux-lvm sistina com
> > http://lists.sistina.com/mailman/listinfo/linux-lvm
> > read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html
> 
> _______________________________________________
> linux-lvm mailing list
> linux-lvm sistina com
> http://lists.sistina.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html
> 



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