Networker

Re: [Networker] Backup Pools

2006-09-25 12:36:32
Subject: Re: [Networker] Backup Pools
From: Darren Dunham <ddunham AT TAOS DOT COM>
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Date: Mon, 25 Sep 2006 09:20:40 -0700
> 
> Saveset chunks are written to the tape when a reasonable sized chunk is ready 
> to go (I'm sure there's a better technical explanation for how this is 
> handled, but that works).  What this results in is a tape which has savesets 
> like:
>  
> |     A    |  B  |        C        |   A   |               B              |A| 
>  C  |
>  
> To recover that data, you'd need to read chunks, position the tape, read more 
> chunks, etc.  When you clone those savesets to another tape, what you end up 
> with is more like:
>  
> |            A            |                    B                  |          
> C        |
>  

While it is possible (and slower) to do that, a Multiplexed tape may
clone to another tape with the multiplex intact.  Cloning is not a
guarantee that the savesets are not multiplexed.

-- 
Darren Dunham                                           ddunham AT taos DOT com
Senior Technical Consultant         TAOS            http://www.taos.com/
Got some Dr Pepper?                           San Francisco, CA bay area
         < This line left intentionally blank to confuse you. >

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