RE: Backup performance issue.

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All excellent ideas.

The number of objects stays pretty consistent.  We do not find ourselves
creating/deleting large numbers of Notes databases.

It is not a save changed objects.  A bulk of these objects would get
changed.

I wondered about that pattern with conflicting jobs.  I will attempt to
log these occurrences better.  However, when I first submitted this email
I put in a lot of performance data and none of it seemed to indicate such.

Yes we have BRMS installed.  I wouldn't exactly say we use it.  I am not
sure that it would fit in with out current backup strategy.  And I don't
see how adapting to the BRMS strategy would help us.

Yes we also have Tivoli.

I am not sure if any of these might be the culprit.  I would hope that
they would appear in the mentioned performance data though.

Rob Berendt
--
"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety."
Benjamin Franklin




Evan Harris <spanner@ihug.co.nz>
Sent by: midrange-l-admin@midrange.com
12/10/2002 08:56 PM
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        Subject:        RE: Backup performance issue.


Rob

Do the numbers of objects saved change significantly ? My experience is
that fewer, larger objects will always save and restore relatively faster
than the same storage size when there are more objects. I understand this
to be caused by the objects etc information that is saved to tape as
distinct from just "streaming data".

I guess you have knocked out the obvious things like saving changed
objects
which versus full saves ?

Are there any patterns to the changes that marry up with weekly or
whatever
procedures ? I once had a save that did weird things the Monday after
month
end. It turned out a couple of guys were running queries and then deleting
the output once they had run some summary queries over the rather large
summary files they created.

Is the start time consistent each night on the first save ?

I seem to recall that you use BRMS: is there some BRMS maintenance that
might makes a difference for example databases getting cleared down ? Do
you use Tivoli as well ?

Hope this helps

Regards
Evan Harris

>We do not do any save-while-active.  We bring down all Domino servers
>prior to the backup.  Yes, we get growth.  Actually about a gig a day.
>However, the growth is consistent, but the backup times do not seem to be
>inline with the growth.  For example on a Tuesday it might take less time
>than on a Monday, even though Tuesday had more information.
>
>We have a program which adds up the size of all of our IFS root
>directories, compares it to the previous day, and lists both the days,
and
>the growth.
>
>Rob Berendt
>--
>"They that can give up essential liberty to obtain a little temporary
>safety deserve neither liberty nor safety."
>Benjamin Franklin

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