Networker

Re: [Networker] How NW cloning & multiplexing REALLY works

2007-01-23 12:22:55
Subject: Re: [Networker] How NW cloning & multiplexing REALLY works
From: Dag Nygren <dag AT NEWTECH DOT FI>
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Date: Tue, 23 Jan 2007 18:41:16 +0200
> 
> >>mark wragge wrote:

> >>No they don't. Save sets on disk devices are not multiplexed. Cloning or 
> >>staging from disk will read save sets sequentially - there is no other 
> >>way it could be done.
> >>    
> >>
> >
> >Why couldn't you do parallel reads from the disk?
> >  
> >
> In theory this is possible, but in current versions it is not written 
> that way. You can only read one stream from a disk device at a time.

According to the release notes for 7.3.2 Networker can now read multiple
concurrent streams from an advanced file type device, but only write one
at the time. I actually tested this some time ago and it does work.

Best
Dag

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