Amanda-Users

Re: large dumps - 2.4.2

2007-03-21 18:04:11
Subject: Re: large dumps - 2.4.2
From: Gene Heskett <gene.heskett AT verizon DOT net>
To: amanda-users AT amanda DOT org
Date: Wed, 21 Mar 2007 17:50:52 -0400
On Wednesday 21 March 2007, Jurgen Pletinckx wrote:
>I'm trying to revive an installation of amanda 2.4.2 which has
>been left unattended for quite a while. I've flushed whatever
>was in the holding disks to tape, cleaned up the remaining
>cruft, and, very tentatively, started amdump.
>
>Rather to my surprise, that seems to work. Several disks
>from several hosts have been written to tape, and more are
>waiting. I will verify what is actually on tape, but it sure
>looks good.
>
>Except for the following types of failures, that is:
>deepskyblue:/dev/xlv/xlv1                0 [dumps too big, but cannot
>incremental dump skip-incr disk]
>deepskyblue:/dev/xlv/xlv2                0 [dump larger than tape, but
>cannot incremental dump skip-incr disk]
>
>Now, the current state of these disks is
>Filesystem             Type  kbytes     use     avail  %use Mounted on
>/dev/xlv/xlv2           xfs 71124192 57681676 13442516  82  /xlv2
>/dev/xlv/xlv1           xfs 71124160 57826144 13298016  82  /xlv1
>
>but they were larger at the time I started amdump. (Yes, I'm doing
>a bit of spring-cleaning on the disks, while waiting for amdump to
>continue). However, they were well under 65G. I would therefore expect
>
>them to fit on the 70G tapes I'm using.
>
>Is this a problem that will disappear after a few more amdump runs?
>I.e., the planner just gets the other partitions out of the way first.
>
>Or should I expect to have to alter the disklist, in order to split
>the contents of these large disks over different dumps?

I think I would work out a way to split those big boys up into smaller 
pieces of the pie.

Amanda's scheduler likes to try and equalize the amount of tape used to a 
fairly consistent percentage from run to run, and you'll make that job a 
whole lot easier if no one disklist entry is more than 10-20% of a tape.

I might also add that 2.4.2 is very dusty these days, and it might not 
hurt to bring it up to one of the 2.5.x versions.  2.4.2 has had many 
years for bit rot to set in now, and it might be doing something a wee 
bit differently than the current versions are.

-- 
Cheers, Gene
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
And they shall beat their swords into plowshares, for if you hit a man
with a plowshare, he's going to know he's been hit.

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