Rainer Holzinger wrote:
>
> Hi all,
>
> I'm running an ADSM Server for AIX 3.1.0.5 with a AIX Client 3.1.0.5 on
> the same machine (wide node in a SP2 Frame, 512 MB, two way cpu).
>
> I'm about trying to find out the performance values for running backups
> via LAN, SP switch or shared memory. What I can see sor far is, that the
> values for data transfer time (237,66 sec. for LAN, 120,01 sec. for SP
> switch and 116,78 sec. for SHRMem) and network data transfer rate
> (7.552,98 KB/s for LAN, 13.166,70 KB/s for Sp switch and 13.254,57 KB/s)
> form the client statistics differ. But the elapsed processing times are
> close together (11:58 LAN, 11:49 SP switch and 12:18).
>
> I'm backing up 8 files (mksysb images of the other SP2 nodes, located
> within a filesystem at the ADSM machine) with about 1,5 GB. Every file
> is about 250 MB. The LAN connection is a fddi 100 Mbit/s connection .The
> ADSM Server is still in a testing state and the AIX client is the only
> cleint so far.
>
> Any idea, why the processing times are so close together? Is there a way
> from where I can see that SHRMem is being used for backup?

Remember that there are other possible bottlenecks.  What is the source
disk configuration (are you using AIX software RAID 0?)?  Are you going
to a disk storage pool or tape?  What kind of tape, if tape?

If you are going to a disk storage pool, try using dd to copy a file
from the source filesystem to the destination filesystem (assuming you
are using JFS files for storage pool volumes).  What rates do you get?

Cheers...
Bruce