Re: Collocation Levels
1997-02-07 13:49:49
Subject: |
Re: Collocation Levels |
From: |
"Dwight E. Cook" <decook AT AMOCO DOT COM> |
Date: |
Fri, 7 Feb 1997 12:49:49 -0600 |
There are apars that address this. I'm slow and on ptf9 but have 10,
11, & 12 here but can't remember which one includes some enhancements
to reduce the number of partially filled tapes with collocation being
turned on.... Grab ptf-12 and scan for collocation... If the right
combination of events occur older adsm servers would grab scratch
tapes to write to ending in multiple partially filled tapes.
NOTE : the number of tape mounts will basically boil down to how much
data is on a client, how many copies you are keeping, and what data
you want back...
REMEMBER : without collocation, over time, you stand a good chance of
haveing a file from a given node on each and every tape in your
library sooooo many tape mounts is a relative term here... is it many
when compared to mounting every tape in your library?
later
Dwight
______________________________ Reply Separator _________________________________
Subject: Collocation Levels
Author: ADSM-L at unix,mime/DD.RFC-822=ADSM-L AT VM.MARIST DOT EDU
Date: 2/7/97 11:29 AM
Does anyone know of an easy way to see how well collocation is working
for a given node? I have had complaints on restores, that many tapes
were being used. The only way I can see to check it, is by a
'Q CONTENT NODE='xxxx' ...' for each volume. Seems like alot of work.
Bob
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Bob Booth - Manager of Systems Administative Services/CCSO
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