Hi there
I got hold of tiotest 0.25 and ran some standard tests and various others..
The results really confirm the poor performance..
17.2Mb/sec average Read
2.5Mb/sec average Write (sequential & random)
The logical device is configured as follows:
Size: 52095
Stripes: 4
Stripe Size: 64Kb
Write Policy: WriteThru
Read Policy: Adaptive
Cache Policy: DirectIO
the file system was made with mke2fs -b 4096 -i 8192
(I now have v1.07 of the megaraid.. no performance fixes tho)
Matthew
>
> [ Tuesday, March 7, 2000 ] Matthew Clark wrote:
> > Hey guys.. I just installed and ran iozone.. neat tool..
> >
> > When the file size reaches 32Mb, I see a huge drop from around 129Mb/sec
> > (obviously caching effects) right down to 10Mb/sec... then at
> 64Mb it drops
> > to between 2.5 and 6.7 Mb/sec depending on record/block size...
>
> Could you try bonnie (textuality.com/bonnie) or tiotest (mirror available
> at sublogic.com/tio that includes the mmap code as 0.25)? The second
> opinions they offer would be interesting to see.
>
> > I have a Dual Intel PIII 500 system with 256Mb of main
> Memory... It has a
> > Hardware RAID 5 system on 5 18 Gb Seagate Barracuda drives
> spread over 3 LVD
> > SCSI channels on a Megaraid controller. I have the latest
> megaraid source
> > (1.05) from ami.com.
>
> what parameters did you use making the h/w array? (write-through vs
> write-back, stripe size, etc)
>
> James
>
