Ok, Veritas in their infinite wisdom, always makes these recommendations:

/opt/ais/openv/netbackup/db/config/SIZE_DATA_BUFFERS      262144
(1024x256)
/opt/ais/openv/netbackup/NET_BUFFER_SZ                    131078  (1024x128)
default is 32    

/opt/ais/openv/netbackup/NUMBER_DATA_BUFFERS             32


The proposed formula is like this:
  size_of_shared_memory = (number of clients that backup in 1 window  x
max_jobs_per_client) 
                              * (number_of_data_buffers  x
size_of_data_buffer

Ok, for each backup job: 32 data buffers (NUMBER_DATA_BUFFERS) @ 256kb in
size (SIZE_DATA_BUFFERS)is 8mb of memory per process.

Now check your Max_jobs_per_client in your xbpadm/File/Netbackup
Configuration menu tab. Its probably at 2 or 4. Default is 2 I think, most
people have it at 4 or more. Then look at your client list. How many clients
does it say you have?

If you have 100 clients, and 4 jobs per client, then you're looking at (100
* 4 * 8MB) = 3200MB as the amount of memory you will need to support
backups...for those of you who didn't catch that, that's 3.2 gigabytes!

To sum up everything here, Netbackup is trying to malloc more memory to use
for backups and you just ran out because these recommendations are telling
it that you have several gigabytes of memory to use for backups on a machine
that is configured with 1GB of RAM.  ;)

The bright side is that your day can only get better from here. ;)


Kevin Trotman
Storage Management Group
Phone: 817-317-8048
Cell: 817-307-0451
email: Kevin_Trotman AT afcc DOT com
            (Trotman, Kevin)



-----Original Message-----
From: mander47 AT sca.csc DOT com [mailto:mander47 AT sca.csc DOT com]
Sent: Tuesday, September 18, 2001 2:55 AM
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] shared memory settings for FC99840 drives




Hi All

We have an envoriment with two SUN E450  with 1 GB ram each as media servers
with 6 FC9840 drives in SSO.
We tried to set SIZE_DATA_BUFFERS and NUMBER_DATA_BUFFERS to 32 and 262144
as
recomended by Veritas.
We also set kernel as minium recomended by Veritas.

The trouble is  we still get:
exited with status 11 (system call failed)
on the all clients that uses these media servers.

We have calculated that we need

192MB of shared memory. (MPX*NUMBER OF DRIVES*SIZE_DATA_BUFFERS*
NUMBER_DATA_BUFFERS)

Does anyone have something like this by shared memory settings,
or do we have to put more memory in the media servers.

Thanks in Advance.
Michael
Total Storage Administrator


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