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Re: Sparc has slow disk access

[From memory]
The E250 has a 53c860 scsi controller an the main board. It has a six
slot scsi backplane for sca disks.


Karl Hammar                    Aspö Data           karl@kalle.csb.ki.se
Lilla Aspö 2340             +46  173 140 57                    Networks
S-742 94 Östhammar         +46  10 270 26 67                  Computers
Sweden                                                       Consulting

From: Andrew Sharp <andy@netfall.com>
Subject: Re: Sparc has slow disk access
Date: Fri, 24 Aug 2001 15:03:03 -0700

> Anton Blanchard wrote:
> > 
> > 
> > > Try the solaris test again, Binkey, and this time use a filesystem
> > > other than /tmp for the output.  Try setting up a ufs-log file
> > > system and see if the performance doesn't exceed that of linux.
> > 
> > I would think that Solaris tmpfs was faster than their filesystems since
> > it wont hit disk unless memory pressure pushes things out to swap.
> > 
> > btw last time I checked, Linux on ext2 beat Solaris on tmpfs at dbench (a
> > filesystem benchmark) by a large margin on a dual ultra 60.
> My point exactly: not only is tmpfs a notoriously slow filesystem to
> begin with, but in this case it almost surely had to go to disk,
> which is REALLY slow when it makes that switch.  The logging UFS
> file system should be faster than ext2, but if the PC is using a
> udma100 setup and the e250 is using a scsi disk at 20MB/s, then the
> faster filesystem might not make any difference.  I just don't
> remember what the default disk setup is on a 250, but I thought it
> was scsi.  What flavor of scsi, I don't remember.  And I misspelled
> Binky.  Dang nab it.
> a

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