If your logs are spread out on multiple tapes, I would concider
implementing collocation to have as much data as possible from the node on
the same tape.
Also, normally, you dont do log backups to minize the amount of data per
day, but to be able to do PIT restores. Therefore, I normally run full
backups at night, and then hourly logs every hour. This way, I have one
full backup and 23 transaction logs, stored on the same tape. In this
case, I dont have to do multiple mounts.
Best Regards
Daniel Sparrman
-----------------------------------
Daniel Sparrman
Exist i Stockholm AB
Propellervägen 6B
183 62 HÄGERNÄS
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Mark Stapleton <[EMAIL PROTECTED]>
Sent by: "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]>
2002-11-25 15:35
Please respond to "ADSM: Dist Stor Manager"
To: [EMAIL PROTECTED]
cc:
Subject: Re: TDP Restoration Process.
On Mon, 2002-11-25 at 06:12, Del Hoobler wrote:
> I am not sure I understand how your solution
> of backing up the log less often will help.
> The same amount of data will need to be backed up
> whether you queue them up or not.
Think about it, Del. It's not the amount of data that I was trying to
work around; it's the number of restores I was trying to reduce.
If you're backing up Domino logs thrice a day, instead of 24 times a
day, you have 1/8th the number of tape mounts, spin-forwards, restores,
log replays, rewinds, and dismounts. Since log restores are a
single-threaded process, and if each log restore requires 4 minutes
(which is pretty conservative), and you're restoring 5 days' worth of
logs, my scheme would require an hour for log restoration, versus 8
hours if you're backing them up every hour.
--
--
Mark Stapleton ([EMAIL PROTECTED])
Certified TSM consultant
Certified AIX system engineer
MCSE
