[Lustre-discuss] Performance parameters

Enrico Morelli
Fri, 06 Jun 2008 14:45:44 -0000

Dear all,

which are the parameters that I can set to improve the
lustre performance?

Because I have very worse performance using lustre 1.6.4.3.
An ''ls'' on a directory containing 1000 files gets 30s (on a
NFS
filesystem the same ''ls'' gets 0.3s)

The same for a file creation/copy.
On lustre:
# time dd if=/dev/zero of=test.txt bs=1k count=1024000
1024000+0 records in
1024000+0 records out

real    1m39.423s
user    0m0.510s
sys     0m10.940s

# time cp test.txt test.out

real    1m2.526s
user    0m0.000s
sys     0m3.550s

On NFS:
# time dd if=/dev/zero of=test.txt bs=1k count=1024000
1024000+0 records in
1024000+0 records out

real    0m11.920s
user    0m0.438s
sys     0m9.864s

# time cp test.txt test.out

real    0m15.012s
user    0m0.012s
sys     0m2.444s


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