Nbduplicate errors

[Abnamro00]

Hi,

We are running Netbackup 4.5GA using a Library including 2 SDLT drives.

After each backup , we perform a Duplication on ONE single tape; We do it via A script ; here is the command:

bpduplicate -v -L D:\Veritas\netbackup\Logs\nbduplicate\Daily-Copy-Backup-2.log -dstunit MCDC0001-MSL5026 -dp Daily-Copy -sl Full-Daily-Backup-2 -hoursago 20 -rl 3 -cn 1 -mpx.

But for a few months we have this error :
13:37:05 INF - Could not open MsgPendingEvent, The system cannot find the file specified.
13:37:05 INF - Waiting for mount of media id AAB002 on server mcdc0001.
13:37:15 INF - Duplicating policy Daily-Backup-2, schedule Full-Daily-Backup-2 created 09/02/2006 00:00:43, source media id DAY023.
13:37:16 INF - Could not open MsgPendingEvent, The system cannot find the file specified.
13:37:16 INF - Could not open MsgPendingEvent, The system cannot find the file specified.
13:37:16 INF - Could not open MsgPendingEvent, The system cannot find the file specified.
13:37:16 INF - host mcdc0001 backupid XXXXXXXXXXXXXX write failed, socket write failed (24).

The only solution we found was removing the multiplexing option , wich make my duplications last about 15 h ,( not acceptable )

If somebody know how to fix that ....


Thanks in advance

 

[Estoragetechie]

I'd check out windows tuning. Are you using the same storage unit that created the first copy. Have you contemplated using inline tape copy?

This could be shared memory issue and / or tcpip sockets issue.Try experimenting with SMALLER tape buffer sizes/number of buffers
Also worth testing to make sure you have TCPIP tuned as you may be running out of sockets due to TIMED_WAIT delay - usually set to 240 on windows - drop it to 30 and test ( you might want to increase other things too). Also check that you specify the duplicating storage unit read drives to NO MORE than half of the drives available!

As usual back up reg first - I'm not responsible for breaking your systems anyway!

MS tuning manual for 2003:

http://download.microsoft.com/download/2/8/0/2800a518-7ac6-4aac-bd85-74d2c52e1ec6/tuning.doc