That’s
the same method I’ve used. I think there is a little fluff in the
2% and you can also obviously cut this down by compressing the catalog after 30
days or whatever. The only thing I noticed is you are calculating 30
incrementals per month, I’m assuming you actually do 6 incrementals per
week (no incremental on same day as full) so it would be 24 not 30. Also,
just out of my own curiosity, why are your monthly fulls less than your weekly
fulls? I would expect them to be equal or possibly the monthly would be
larger if you are including more data.
Date: Fri, 13 Mar
2009 11:40:35 -0400
From: Todd Jackxon
<netbackup.info@gmail.com>
Subject:
[Veritas-bu] How to properly calculate the Catalog
To: veritas-bu AT mailman.eng.auburn DOT edu
Message-ID:
<f7e0214e0903130840o1300e963l20b9c06bd88e9c9 AT mail.gmail DOT com>
Content-Type:
text/plain; charset="windows-1252"
Hello All,
I am trying to use
the formula for calculating the catalog and not sure about the results. Has
anyone Calculated the catalog using the formula in the Performance Tuning guide?
Can you please
explain how to properly do this?
1 ? "When the
formula states total backups" ... is this for one Full backup of all data
for one day?
Schedule
Incremental - daily
- retention 5 weeks
Weekend Full -
retention 6 weeks (only first 3 weekends) Month-End - retention 1 year (last
Saturday of the month)
Below is my attempt
to calculate this. Any clarification would be appreciated.
-----------------
614GB data back
up * 3 Full Backups (1842GB) * 2 months retention (3684GB)
= 3.5 TB
Full
447GB data back
up * 1 Full Monthly Backup (447GB) * 12 months retention
(5364GB) = 5.2 TB
Month End Full
122GB
incremental * 30
incr backups monthly (3660GB) * 5 week retention (1.25
months) 4605GB =
3.5 TB
--------------
3.5 TB incr
3.5 TB Weekly Full
5.2 TB Month-End
Full
= 12.2 TB =
Netbackup catalog size (2%) = 240GB Catalog space
This does not seem
right???
Thanks
Jack