ADSM-L

Domino log rollforward recovery

2005-11-11 00:30:31
Subject: Domino log rollforward recovery
From: Steven Harris <steve AT STEVENHARRIS DOT INFO>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Fri, 11 Nov 2005 00:27:43 -0500
Hi all

I'm running Domino 654 on AIX 5.2 backing up using shared memory to TSM 5.3.1.4.
Domino Client is 5.1.5.1.  Backend is a 3584 with 6xLTO2 drives.

We've been cutting over our email users from their old product and so email 
volumes have
increased dramatically.

Currently we run a selective once per week, incrementals daily (about 5% of 
databases get
compressed on any given day) and archivelog backups every four hours.  Our 
busiest domino
instance produced over 2600 x 64MB transaction logs last week.

Now, when we had to do some serious roll forward recoveries a while back, it 
took about 2 to
3 minutes per log to do the restore and roll forward.  Thus we are looking at a 
worst case of
something like 18 hours to roll forward a full day's logs for 1 database, or a 
bit over 5 days
for a week's work.

So, yes, we will have to to selectives more frequently, probably half of the 
farm every night,
but we also need to speed up the log apply process.  I'm  thinking that 
increasing  the size of
the domino transaction logs will probably help with this, and I've got my 
Domino admins
researching their end, but would appreciate input from users on this list.

Thanks

Steve Harris
AIX and TSM Admin
Currently in Sydney, Soon back in Brisbane, Australia

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