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Overwrite/Append Settings

Posted on 2008-10-20
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Last Modified: 2013-12-01
I just want to make sure I have the correct handle on Overwriting and Appending media (Backup Exec 12).  

I want to have 2 weeks worth of backups at a time, and then the 3rd week would overwrite the first week...and so on.  There will be 2 full backups each week paired with incremental backups.  I believe I need 3 jobs and 3 media sets scheduled as follows:

 

MEDIA SETS
Ovr13d_App0h
Overwrite = 13 days
Append = 0 hours

 

Ovr13d_App3d
Overwrite = 13 days
Append = 3 days

 

Ovr13d_App2d
Overwrite = 13 days
Append = 2 days

 

FULL BACKUPS
Tue, Fri
Overwrite
media set Ovr13d_App0h

 

INCREMENTAL BACKUP 1
Sat, Sun, Mon
Append, Overwrite if no appendable media
media set Ovr13d_App3d



INCREMENTAL BACKUP 2
Wed, Thu
Append, Overwrite if no appendable media
media set Ovr13d_App2d

 

Would the above method be the ideal way to do this, or is there a better way? Because the only other thing I can think to do is create 2 media sets (Ovr13d_App2d and Ovr13d_App3d) and schedule 4 jobs (2 full jobs and 2 incremental jobs).  I'm not sure if that would have any advantage though...
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Question by:deadite
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10 Comments
 
LVL 23

Expert Comment

by:Rahul Misra
ID: 22762709
An Incremental is always in respect to a FULL JOB
so if you have 2 FULLS you should create respective incrementals

Also the strategy that u have formed will not work the way you expect .
for a better understanding please read the following documents carefully

THE Device and Media Management in BEWS is a little tricky to understand

An explanation of the "Overwrite Protection Period" and the "Append Period"
http://support.veritas.com/docs/237374 

The basics of Advanced Device and Media Management (ADAMM) for Backup Exec for  Windows Servers
http://support.veritas.com/docs/192265 


Media overwrite protection
http://support.veritas.com/docs/298982 


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LVL 8

Author Comment

by:deadite
ID: 22767518
Ok,

I broke out Excel and counted the days for my Full and Inc (based on my jobs starting at 6pm, 10-12 hr estimate for full, 2-4hr estimate for inc, and started counting when the job ends).  I think I have a backup plan that should work using 2 media sets, and 2 jobs.  The sheet is attached, and here is my outline:

Full Backup Media Set:
Opp = 11 days (Could even be 13, but 11 is all I need)
App = 0 hours

Inc Backup Media Set:
Opp = 13 days
App = 0 hours

My Full and Inc backup jobs are all set to "Overwrite".  Then select "Use over writable media before scratch media".

This will give me the 2 week retention I want before overwriting.  One the Third week, Tue overwrites the Tue from week 1.  Then Wed overwrites wed from week1.

If someone can confirm this, or point out what is wrong with my logic, I'll give out some points... I might even increase them.

Calc.jpg
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LVL 23

Expert Comment

by:Rahul Misra
ID: 22768756
Well the objective here is to help not to get the points increased
now  that u mention the points i guess the trouble is not worth 125 points
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LVL 23

Expert Comment

by:Rahul Misra
ID: 22770076
The main point that u have not mentioned here is the number of tapes being used and what jobs are appending to which tape?
0
 
LVL 23

Expert Comment

by:Rahul Misra
ID: 22770083
The reason I ask is when you append to a TAPE or a media the OPP is reset
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LVL 8

Author Comment

by:deadite
ID: 22772144
Thanks for the replies.  This is a backup-to-disk job.
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LVL 23

Expert Comment

by:Rahul Misra
ID: 22772190
that makes your task a lot easier.
How much space do you have for the B2D ????
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LVL 8

Author Comment

by:deadite
ID: 22772200
several terabytes....

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LVL 23

Accepted Solution

by:
Rahul Misra earned 300 total points
ID: 22779694
To keep things simple this is how i would do it.

2 Jobs 1 media set
Media set properties
OPP 2 Weeks
AAP 0 hours

B2D Properties
Ensure that no threshold is set
Ensure that the Max Size for B2D file is left at default
No preallocation

1 Full and 1 Incremental
Both backup associated with the same media set.

Both the FULL and the INCREMENTAL to use the SAME SELECTION LIST and have the same media set specified
The type of Backup will differ from FULL to Incremental

That is all to get the desired result
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LVL 23

Expert Comment

by:Rahul Misra
ID: 22779923
Sorry
Forgot to mention
The MEDIA OVERWRITE PROTECTION LEVEL should be set to PARTIAL
Set the Jobs to OVERWRITE MEDIA when the job begins




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