Subject: Re: Terrible tar performance on RAID 0 filesystem
To: Jared D. McNeill <>
From: Greg Oster <>
List: current-users
Date: 03/12/2001 17:00:36
"Jared D. McNeill" writes:
> I don't know, this just doesn't look right to me. I downloaded pkgsrc/mk
> as a tarball from, and I noticed some strange tar behavior.
> /export is a RAID 0 filesystem, / is a normal filesystem. Both are using
> softdeps and the kernel is relatively new (1.5S).

What does your disklabel for the RAID set look like?  I'm wondering 
if this could be the "sucky performance due to bad default disklabel values" 
problem reported in PR#11989... 

> blackhole:~# time tar -xpf /export/pkgsrc/mk.tar
> real    0m0.253s
> user    0m0.001s
> sys     0m0.039s
> blackhole:~# cd /export
> blackhole:/export# time tar -xpf /export/pkgsrc/mk.tar
> real    3m39.159s
> user    0m0.020s
> sys     0m6.811s
> blackhole:/export# uname -a
> NetBSD 1.5S NetBSD 1.5S (BLACKHOLE) #0: Sun Mar  4
> 01:43:31 AST 2001
> i386
> Has this been fixed in the last few days?

No, likely not. (unless it's not related to RAID at all... in which case
someone else will have to speak up :) )


Greg Oster