Raidframe performances (was: Re: NFS performances)

[Emmanuel Dreyfus <manu%netbsd.org@localhost>]

> > Done on the NFS server itself:
> >    5.31s real 0.00s user 0.39s system
(...)
> I find the server quite slow on the local test. Does it have enough CPU
> to process NFS traffic at this speed ?

Right, this is not a NFS performance problem, but a RAIDframe performance
problem. Here is what I get on a non RAID partition:
# time dd if=/dev/zero of=/var/crash/z bs=1024k count=100
    1.63s real     0.00s user     0.34s system

And here is on a RAID backed partition:
# time dd if=/dev/zero of=/nc-boot/z bs=1024k count=100 ;         
    5.77s real     0.00s user     0.37s system

Here is the RAID setup, note that it uses the same disk where
performance are decent:
# mount
/dev/ld1e on /var/crash type ffs (log, local)
/dev/raid1b on /nc-boot type ffs (log, nodev, nosuid, NFS exported, local)
# raidctl -s raid1        
Components:
           /dev/ld1a: optimal
           /dev/ld2a: optimal
No spares.
Component label for /dev/ld1a:
   Row: 0, Column: 0, Num Rows: 1, Num Columns: 2
   Version: 2, Serial Number: 2147483647, Mod Counter: 6677
   Clean: No, Status: 0
   sectPerSU: 128, SUsPerPU: 1, SUsPerRU: 1
   Queue size: 100, blocksize: 512, numBlocks: 488259200
   RAID Level: 1
   Autoconfig: Yes
   Root partition: No
   Last configured as: raid1
Component label for /dev/ld2a:
   Row: 0, Column: 1, Num Rows: 1, Num Columns: 2
   Version: 2, Serial Number: 2147483647, Mod Counter: 6677
   Clean: No, Status: 0
   sectPerSU: 128, SUsPerPU: 1, SUsPerRU: 1
   Queue size: 100, blocksize: 512, numBlocks: 488259200
   RAID Level: 1
   Autoconfig: Yes
   Root partition: No
   Last configured as: raid1
Parity status: clean
Reconstruction is 100% complete.
Parity Re-write is 100% complete.
Copyback is 100% complete.


-- 
Emmanuel Dreyfus
manu%netbsd.org@localhost