Veritas-bu

Re: [Veritas-bu] Drive Multiplexing

2008-07-29 12:00:10
Subject: Re: [Veritas-bu] Drive Multiplexing
From: Justin Piszcz <jpiszcz AT lucidpixels DOT com>
To: Dean <dean.deano AT gmail DOT com>
Date: Tue, 29 Jul 2008 11:30:42 -0400 (EDT)

On Tue, 29 Jul 2008, Dean wrote:

> 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
With >= 5.1 I do not think this is required anymore.
(e.g. the NEW_STREAM directive is not needed)

With <= 4.5_FPX I think it was required.

But agree with the concept, yup!

>
> 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
>

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