Friday, September 02, 2005

benchmark with 'time mkfile 650M testfile'

Hi,

we use an old E450 (2 X UltraSPARC-II 400MHz) with Sun Solaris 8
installed - mainly as fileserver.

The two internal disk are mirrored with SDS and used for /, /usr, /var,
/local, /opt...

Attached to the E450 is a StorEDGE A1000 set up as RAID5 and used as
separate mount point /projekte.

I use UFS logging for all disks.

A quick benchmark with 'time mkfile 650M testfile' showed the following
results.

* RAID5 device /projekte
$ time mkfile 650M testfile

real 0m31.310s
user 0m0.230s
sys 0m10.710s

15MB/s might be ok for RAID5.

* mirrored device /local
$ time mkfile 650M testfile

real 4m49.407s
user 0m0.180s
sys 0m11.940s

That's only ~2MB/s!

How can I debug the problem further? Any hints?

Thanks, Ralf

hi

i don't have an answer, but's really poor.
here the result of my old e450 - not mirrored fs.
as a value to compare.

# time mkfile 650M testfile

real 0m20.32s
user 0m0.23s
sys 0m10.33s

and this is the result of a mirrored fs on v880
but the volume manager is from veritas.

real 0m16.82s
user 0m0.13s
sys 0m5.77s

best regards
hans

0 Comments:

Post a Comment

<< Home