Networker

Re: [Networker] Forwarding files -- what's really happening?

2003-01-16 17:01:34
Subject: Re: [Networker] Forwarding files -- what's really happening?
From: Byron Servies <bservies AT PACANG DOT COM>
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Date: Thu, 16 Jan 2003 14:01:25 -0800
On January 16, 2003 at 15:07, George Sinclair wrote:
> Does anyone know what NetWorker is really doing when it says forwarding
> x file(s) during a recover? I've noticed sometimes, it might forward 25
> files and then suddenly forward another x number of files and then start
> the recovery. I've even seen it do this three times before the actual
> recovery of the data itself starts. Why not just forward all the numbers
> at one time? The forwarding of files seems pretty quick, but I'm
> wondering if there's some relationship to the number of files that it
> must forward and the number of savesets on the tape? In this case, what
> does the term 'file' refer to: a single save stream that was written to
> the tape, something else?

NetWorker is referring to marks written on the tape, not a
file on the file system.  The special markers, called
file marks for historical reasons, are generally written
at regular intervals, but I do not know what that interval
is.  When NetWorker says it is skipping some number of
files, that means it is positioning the tape to the place
where the next block in the recover stream is located.  Or,
to where the next save stream may be written.

Fast forward on the VCR, you might say.

HTH,

Byron

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