We are experiencing issues concerning the backup performance on some of our SLES+OES servers.
The affected machines are running virtualized on VMWare with 1 CPU and 2 GB RAM.
One of the servers is a SLES 1O SP3/OES 2 SP2a and the other are SLES 10SP3/OES 2 SP3.
The backup software we are currently using is Commvault's Simpana 9.
Here are some of the results:

a) Server 1 (SLES 10 SP3/OES2 SP3)
LINUX partition (EXT3)=> 7.97 GB with a throughput of 43 GB/h
OES partition (NSS) => 110.68 GB with a throughput of 3.45 GB/h => with this speed the full backup needs a backup windows of 31 hours.....
De TSAFS.conf, looks like:
cluster=enable
cachememroythreshold=15
readaheadthrottle=2
readbuffersize=65536
readthreadallocation=100
readthreadsperjob=10
tsamode=Dual
cachingmode=enable

b) Server 2 (SLES 10 SP3/OES2 SP3)
LINUX partition (EXT3)=> 5.75 GB with a throughput of 48 GB/h
OES partition (NSS) => 120.69 GB with a throughput of 9.34 GB/h => with this speed the full backup needs a backup windows of 13 hours.....
De TSAFS.conf, looks like:
cluster=enable
cachememroythreshold=1
readaheadthrottle=2
readbuffersize=65536
readthreadallocation=100
readthreadsperjob=4
tsamode=Dual
cachingmode=disable


c) Server 3 (SLES 10 SP3/OES2 SP2a)
LINUX partition (EXT3)=> 5.27 GB with a throughput of 5.63 GB/h
OES partition (NSS) => 98.27 GB with a throughput of 3.22 GB/h => with this speed the full backup needs a backup windows of 30,5 hours.....
De TSAFS.conf, looks like:
cluster=enable
cachememroythreshold=1
readaheadthrottle=2
readbuffersize=65536
readthreadallocation=100
readthreadsperjob=4
tsamode=Dual
cachingmode=disable


The most strange of all is that I have another 2 servers where the backup performance is acceptable both are SLES 10 SP3/OES 2SP2a
d) Server 4 (SLES 10 SP3/OES2 SP2a)
LINUX partition (EXT3)=> 7.88 GB with a throughput of 72.95 GB/h
OES partition (NSS) => 72.82 GB with a throughput of 21.47GB/h => it is not really fast, but at least it is acceptable on this environment (3.3 h)
De TSAFS.conf, looks like:
cluster=enable
cachememroythreshold=1
readaheadthrottle=2
readbuffersize=65536
readthreadallocation=100
readthreadsperjob=4
tsamode=Dual
cachingmode=disable

e) Server 5 (SLES 10 SP3/OES2 SP2a)
LINUX partition (EXT3)=> 8.96 GB with a throughput of 82.72 GB/h
OES partition (NSS) => 150 GB with a throughput of 27.13 GB/h => it is not really fast, but at least it is acceptable on this environment (5.5 h)
De TSAFS.conf, looks like:
cluster=enable
cachememroythreshold=10
readaheadthrottle=2
readbuffersize=65536
readthreadallocation=100
readthreadsperjob=4
tsamode=Linux
cachingmode=enable

As you can see the OES backup is really slow (in fact much slower than with Netware, and also than pure LX), so I was wondering if someone have been facing with this issue and how can it be fixed.
Any suggestions there?
Thanks in advance.

Ricard Malvesi