NDMP Backup Catalog Writing

[OHWS]

Just started backing up NDMP client and have a question regarding the NDMP catalog entries. The tape drive is directly connected so the thoughput is around 15000KBps. This is great except for the fact that the backup I am performing is very large (470gig) and has tons of small data files (Millions). The backup stalled last night and I've seen many of the following msgs in the bptm log:

15:09:00.732 [7445] <2> write_data_ndmp: dir info came in, 2572879 total dirs
15:09:00.732 [7445] <2> write_data_ndmp: node info came in, 2525996 total nodes
15:09:02.295 [7445] <2> write_data_ndmp: dir info came in, 2573881 total dirs
15:09:02.295 [7445] <2> write_data_ndmp: node info came in, 2526997 total nodes

Is this my catalog attempting to catch up with the backup. These messages are constant while the backup is running and then all of a sudden they stopped and my backup's throughput dropped to around 681KBps (Ugly).
I may just try and attempt to break the backup out into smaller backups. It started slowing down at around 300gig. Thanks in advance for any input regarding this matter!

 

[hpuxrules]

What kind of filer are you backing up? Netapp? CLARiiON?

How many network shares are being backed up?

How many tape drives do you have available to your NDMP backups?

 

[OHWS]

I am backing up a CLARiiON device with one directly attached IBM LTO gen1 tape drive (switch in between).

To give you an idea of what I am doing. There are four different directories on the NAS device that all have a large amount of image files. The one particular /dir1 is giving me the problems. The strange part about this issue is that I backed up one of the other directories which was around 750gig without any problems at all. The only issue that I could think of was the DAR maximum directory level 1024 default setting. I was thinking of doubling that number??

 

[hpuxrules]

Is this a NAS (NS series) or a CLARiiON (CX series)

I'm not sure if doubling your DAR setting will help.

I think the real answer is another tape drive.

Has Symantec shed any light on it?