Networker

Re: [Networker] multiplexing questions

2004-11-04 15:00:58
Subject: Re: [Networker] multiplexing questions
From: Matt Cowger <mcowger AT PLU DOT EDU>
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Date: Thu, 4 Nov 2004 08:40:13 -0800
Responses below

George Sinclair wrote:
Okay, I need a refresher here and just want to make sure I understand
this correctly.

o If I'm using nsrclone to clone savesets like: 'nsrclone -b clone_pool
-S ssid1 ssid2 ...'

then NetWorker will preserve the multi-plexing on the clone volume.
However, if none of these savesets was multi-plexed on the original
volume(s) then NetWorker will not now multi-plex them on the clone(s)
volumes, so it preserves multi-plexing where it existed before but
doesn't create it where it didn't, correct?

My understanding of this is you are correct, and it is somewhat born out
when I look at my cloning speeds on the various clones that I run.

o If you instead run 'nsrclone -b clone_pool -S ssid' for each ssid, one
at a time, then it doesn't matter if the original savesets were
multi-plexed or not. The ones that end up on the clone volumes will not
be. They will have been de-multiplexed as need be, yes?

Correct - it will demux all the savesets.

o If you clone a volume as 'nsrclone -b clone_pool -V volid' then
multiplexing will be preserved on clone(s) wherever it existed before?

Correct - you basically end up with a duplicate tape.

o use of '-S file' or '-V file' will do same as above, yes?

I would guess so, but I'll lave that to better informed others :).

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