Re: [Networker] Multiplexing and demultiplexing on clones?
2003-05-02 13:36:58
Yet more reasons to migrate to a 'backup to disk, archive to tape' paradigm
Signed
The Guy Who Just Happens To Work For A Storage Company :)
-----Original Message-----
From: Wes Ono [mailto:wono AT legato DOT com]
Sent: Friday, May 02, 2003 1:16 PM
To: 'Legato NetWorker discussion'; 'lemons_terry AT EMC DOT COM'
Subject: RE: [Networker] Multiplexing and demultiplexing on clones?
To add to Terry Clayton's response:
On a file-type device, savesets are stored in a non-multiplexed way, even if
multiple savesets are concurrently written to the device. So when you clone
from a file-type device, the output will be non-multiplexed, regardless of
whether you issue a single nsrclone with multiple SSIDs or multiple
nsrclones each having a single SSID.
Or, for those who are more visually oriented:
If data is written to a file-type device as if it were being multiplexed:
SSID1 SSID2 SSID1 SSID3 SSID2 SSID3 SSID1
It is actually stored as separate savesets:
SSID1
SSID2
SSID3
So when you clone these savesets to tape using EITHER
nsrclone SSID1 SSID2 SSID3
or
nsrclone SSID1
nsrclone SSID2
nsrclone SSID3
The output tape will be non-multiplexed:
SSID1 SSID2 SSID3
Staging behaves the same way as cloning.
Wes
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