oops, accidentally sent this directly to Robert rather than to the list.
---------------
Chris Hoogendyk
-
O__ ---- Systems Administrator
c/ /'_ --- Biology & Geology Departments
(*) \(*) -- 140 Morrill Science Center
~~~~~~~~~~ - University of Massachusetts, Amherst
<hoogendyk AT bio.umass DOT edu>
---------------
Erdös 4
-------- Original Message --------
Subject: Re: amadmin daily tape question
Date: Mon, 04 Aug 2008 14:39:34 -0400
From: Chris Hoogendyk <hoogendyk AT bio.umass DOT edu>
To: McGraw, Robert P <rmcgraw AT purdue DOT edu>
References: <BFE8BDBA75FE9949B836E36C3FBF334F0409DFA6 AT EXCH02.purdue DOT
lcl>
McGraw, Robert P wrote:
I have a tape library that had 36 slots. I was using slots 1-28 for my daily
run.
When tapecycle was equal to 28 tapes, I got the following:
zorn->[44] > amadmin daily tape
The next Amanda run should go onto tape D00006 or a new tape.
tape D00007 or a new tape.
tape D00008 or a new tape.
tape D00009 or a new tape.
I have decided to add two new tapes to slot 29 & 30. I changed tapecycle
from 28 tapes to 30 tapes. My runtapes is still equal to 4.
Now when I run now "amadmin daily tape" I get
host->[42] > amadmin daily tape
The next Amanda run should go onto 4 new tapes.
The next 2 new tapes already labeled are: D00030, D00029.
QUESTION: Is this going to require that I have 4 new tapes? Why do I not get
some of my older tapes listed when I changed to 30?
Typically, you want more tapes than your tapecycle. When you had
runtapes 4 and tapecycle 28, it was an even multiple, and seemed to have
worked. With runtapes 4 and tapecycle 30, you are using the 2 new tapes
and then asking for 2 tapes from the oldest set of 4. That may be
causing trouble with the selection of tapes for re-use. When your number
of tapes is equal to your tapecycle, Amanda will take the oldest tape,
or in this case the oldest set. But now you are putting it into a mode
where it will be taking the oldest 2 and then breaking the next oldest
set to get 2 more.
If I were doing it, I would add 4 new tapes rather than 2. I might also
leave the tapecycle at 28. You aren't really gaining much, if anything,
by adding only 2 tapes, because you will only have 7 complete sets of 4.
The remaining 2 tapes will represent an incomplete set that would be
difficult to recover anything from.
---------------
Chris Hoogendyk
-
O__ ---- Systems Administrator
c/ /'_ --- Biology & Geology Departments
(*) \(*) -- 140 Morrill Science Center
~~~~~~~~~~ - University of Massachusetts, Amherst
<hoogendyk AT bio.umass DOT edu>
---------------
Erdös 4
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