On Mon, 2004-10-18 at 17:39, Daniel McNeil wrote:
> On Mon, 2004-10-18 at 14:38, Kevin Anderson wrote:
> [snip]
> >
> > Can you rerun the ext3 numbers to the same storage as GFS? Would also
> > be interesting to run from two nodes simultaneously to separate ext3
> > filesystems on the storage as well? Doing dd's of the logical
> > partitions would also be interesting to see what bandwidth the storage
> > is capable of providing, first single node then simultaneous from both
> > nodes.
> >
>
> Partial ext3 results:
>
> ext3 on 5 disk stripe
> =====================
> time tar xf /Views/linux-2.6.8.1.tar; time sync
> real 0m5.221s user 0m0.442s sys 0m4.238s
> real 0m8.214s user 0m0.000s sys 0m0.390s
>
> (1st time)time du -s linux-2.6.8.1/
> 226916 linux-2.6.8.1/
> real 0m2.888s user 0m0.035s sys 0m0.288s
>
> time rm -rf linux-2.6.8.1/
> real 0m2.131s user 0m0.022s sys 0m0.821s
>
> data=writeback
> --------------
> time tar xf /Views/linux-2.6.8.1.tar; time sync
> real 0m5.443s user 0m0.439s sys 0m4.056s
> real 0m8.774s user 0m0.001s sys 0m0.388s
>
> time rm -rf linux-2.6.8.1/; time sync
> real 0m1.127s user 0m0.035s sys 0m1.012s
>
> time du -s linux-2.6.8.1/
> 226916 linux-2.6.8.1/
> real 0m2.741s user 0m0.058s sys 0m0.281s
>
> data=log
> ========
> time rm -rf linux-2.6.8.1/; time sync
> real 0m2.106s user 0m0.024s sys 0m0.824s
>
> time du -s linux-2.6.8.1/
> 226916 linux-2.6.8.1/
> real 0m2.738s user 0m0.025s sys 0m0.312s
>
> time tar xf /Views/linux-2.6.8.1.tar; time sync
> real 0m22.784s user 0m0.445s sys 0m4.639s
> real 0m1.234s user 0m0.001s sys 0m0.248s
I partitioned my 5 disk stripe into 2 partitions and
ran the tar/du/rm test from 2 ext3 file systems from
2 nodes simultaneously.
2 ext3 file systems on separate partitions of a 5-disk stripe
=============================================================
time tar xf /Views/linux-2.6.8.1.tar; time sync
real 0m6.574s user 0m0.498s sys 0m4.097s
real 0m20.915s user 0m0.000s sys 0m0.480s
cl030]# time tar xf /Views/linux-2.6.8.1.tar; time sync
real 0m6.324s user 0m0.460s sys 0m4.179s
real 0m21.434s user 0m0.001s sys 0m0.459s
time du -s linux-2.6.8.1/
226916 linux-2.6.8.1/
real 0m3.207s user 0m0.054s sys 0m0.264s
cl031]# time du -s linux-2.6.8.1/
226916 linux-2.6.8.1/
real 0m2.890s user 0m0.037s sys 0m0.291s
time rm -rf linux-2.6.8.1/; time sync
real 0m2.265s user 0m0.029s sys 0m0.809s
real 0m0.194s user 0m0.000s sys 0m0.005s
time rm -rf linux-2.6.8.1/; time sync
real 0m2.441s user 0m0.025s sys 0m0.835s
real 0m0.176s user 0m0.001s sys 0m0.003s
It looks like the tar time from 2 ext3 file systems to
the same 5 disk stripe is taking twice as long. The
du and rm times are almost the same as 1 ext3 file system
on the 5 disk stripe alone.
Daniel
