Re: [Veritas-bu] Drive Multiplexing

I don't really know why you would be getting 5 streams per mount point. I have never seen this. But then, I haven't messed with include and exclude lists like you describe.

Why not just setup a policy with the five mount points you want to backup specified in it's selection list? With "allow multiple data streams" enabled, you *should* get one stream per mount point. If I remember correctly, you will need a NEW_STREAM directive before each mount point in the selection list. (it's been a while)

NEW_STREAM
/mount_point_1
NEW_STREAM
/mount_point_2
...
etc

Then you can throttle the amount of streams you actually want mlutiplexed to tape at one time at the schedule level or the storage unit level.

Symantec's advice seems wrong to me. I guess they misunderstood what you are trying to achieve. Turning off multi-streaming in the policy will mean the whole backup is a single stream, as you are seeing.

Cheers,
Dean

On Tue, Jul 29, 2008 at 10:03 PM, Jeremy Finn <jeremy.finn AT gmail DOT com> wrote:

Hello,

I am trying to achieve the streaming of five mount points on an HP-UX client to one LTO-1 tape drive. I have run into a strange issue though.

If I set multistreaming to five, and multiplexing to five, I see each stream as a job in the activity monitor. However, NBU is breaking up each mount point into five streams - not what I want. I want one stream for each mount point.

Symantec support has instructed me to turn off multistreaming in the policy, and leave multiplexing set to five. When I do this, there is only one job in the activity monitor for the client, and I cannot verify that I am multiplexing the mount points to the tape drive. Also performance is not what it should be for this backup, running at 13 hours instead of the five or six I would normally expect for roughly 420 gb of data.

My environment looks like this:

Master = SPARC / Solaris 10 / NBU 6.0 MP4
Media Server = PA-RISC / HP-UX 11.11 / NBU 6.0 MP 4
Client = PA-RISC / HP-UX 11.11 / NBU 6.0 MP 4

I am using the ALL_LOCAL_DRIVES directive, with an exclude_list of "/". I have an include_list that specifies the mount points I want to back up.

Does anyone have any suggestions that will help me to verify that I am in fact multiplexing the mount points to the tape drive during the backup?

Any suggestions and feedback are welcome. Thank you for your help.

Regards,
Jeremy

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