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
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