[Lustre-discuss] Performance for Lustre 1.6.5

[Johnlya]

ext3 Filesystem test:
#!/bin/bash
for ((i=0; $i<1000000; i++))
do
                fileid="/home/test/testm/$i";
                touch $fileid
done

time ./fileid.sh
real    16m44.438s
user    3m0.860s
sys     12m35.920s

time ls
real    1m54.691s
user    0m13.770s
sys     1m0.220s

touch:1000000/(16*60+44.438)=995.58
ls:1000000/(1*60+54.691)=8719.08

Lustre 1.6.5 slower than normal file system?

Add:
    The network of Lustre Filesystem is Giga network.

On Thu, 2008-07-17, at 03:50 PM, Johnlya <john... at gmail.com> wrote:
> I test touch and ls command of Lustre on Linux 2.6.9-67.0.7.EL_lustre.
> 1.6.5smp (x86, 64bit, mem:4G,two CPU).
> Lustre Filesystem:
> one MDS
> one OSS(one OST)
> I found it some problems:
> With the increase in the number of files, Lustre system performance
> decrease too much.
> 1. fileid.sh
> #!/bin/bash
> for ((i=0; $i<10000; i++))
> do
>                 fileid="/mnt/webfile/test/$i";
>                 touch $fileid
> done
> time ./fileid.sh
> eal    0m20.493s
> user    0m1.930s
> sys     0m9.340s
>
> time ls
> real    0m2.748s
> user    0m0.050s
> sys     0m0.610s
> touch:10000/20.493=487.97
> ls:10000/2.748=3639.01
> 2.
> #!/bin/bash
> for ((i=0; $i<1000000; i++))
> do
>                 fileid="/mnt/webfile/test/testm/$i";
>                 touch $fileid
> done
> time ./fileid.sh
> real    60m56.666s
> user    3m11.690s
> sys     20m37.190s
>
> real    15m48.615s
> user    0m14.530s
> sys     3m52.960s
>
> touch:1000000/(60*60+56.666)=273.47
> ls:1000000/(15*60+48.615)=1054.16
>
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