Amanda-Users

Re: Holding disks and the disk output driver

2003-06-10 14:21:38
Subject: Re: Holding disks and the disk output driver
From: "Steven M. Wilson" <stevew AT purdue DOT edu>
To: Brian Cuttler <brian AT wadsworth DOT org>
Date: Tue, 10 Jun 2003 13:17:16 -0500
Brian,

I don't know much about the rait driver.  Hopefully someone more knowledgeable on the list will respond.  I was unclear what you meant about moving to "diskless backups"...

Steve

Brian Cuttler wrote:
Ted,
Steve,
Amanda users,

Stupid question, how smart is the rait driver for disk ?

If you put the spool area on the output disk will it juggle
the space ok ? Will it know to move the file from one directory
to another (move the file pointer # mv perhaps) rather than 
having to copy all the bits and then remove the original ?

I only ask because someone at my site is looking to move to
diskless backups...

						thanks,

						Brian

  
Ted,

I've been using a 2 TB disk array for the past month or so and it's been 
working great for me without a holding disk.  Using a holding disk will 
require more free disk space plus the additional time to transfer from 
the holding disk to the backup disk.

I recommend getting a patch from Jean-Louis Martineau 
(martinea AT IRO.UMontreal DOT CA) which prevents a client error from forcing 
Amanda to go into degraded mode.  When Amanda operates in degraded mode, 
it will only write to the holding disk, which in my case doesn't exist. 
 But the patch prevents client-side errors from putting Amanda into 
degraded mode which allows my backups to continue being written to the 
backup disks.

Steve

Ted Cabeen wrote:

    
If you're using the disk output driver to run backups to a large disk
array, is there any reason to use a holding disk?

 

      
-- 
Steven M. Wilson, Systems and Network Manager
Markey Center for Structural Biology
Purdue University
stevew AT purdue DOT edu    765.496.1946



    
  

-- 
Steven M. Wilson, Systems and Network Manager
Markey Center for Structural Biology
Purdue University
stevew AT purdue DOT edu    765.496.1946