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Change policy from keep forever to 7 years

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jackd

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This is my first thread and I'm not sure what I data I need to pass along for this question. I'm running TSM extended edition V 5.5.4 on z/OS MVS V 1.11. The DB is 115 GB.

I make monthly exchange backups the first weekend every month that we keep forever. Management decided to change this policy to only keep the last 7 years of data. I’m not that confident in my policy skills and would like someone to check over my thought process.

My current policy looks like:

Domain:
Policy Domain Name: EXCHANGE
Activated Policy Set: EXCHANGE
Activation Date/Time: 09/19/08 08:06:02
Days Since Activation: 927
Activated Default Mgmt Class: EXCHANGE
Number of Registered Nodes: 26
Description: Exchange Policy Domain
Backup Retention (Grace Period): 30
Archive Retention (Grace Period): 365
Last Update by (administrator): T2JPD
Last Update Date/Time: 09/19/08 08:06:02
Managing profile:
Changes Pending: No
Active Data Pool List:

Policy:
Policy Domain Name: EXCHANGE
Policy Set Name: EXCHANGE
Default Mgmt Class Name: EXCHANGE
Description: Exchange Backup Policy
Last Update by (administrator): T2SEM
Last Update Date/Time: 07/10/03 16:48:12
Managing profile:
Changes Pending: No

Management class:
Policy Domain Name: EXCHANGE
Policy Set Name: EXCHANGE
Mgmt Class Name: EXCHANGE_MONTHLY
Default Mgmt Class ?: No
Description: Policy to retain a monthly full backup forever.
Space Management Technique: None
Auto-Migrate on Non-Use: 0
Migration Requires Backup?: Yes
Migration Destination: T10KMONEXCH
Last Update by (administrator): T2JPD
Last Update Date/Time: 05/04/07 10:49:14
Managing profile:
Changes Pending: No

Copygroup:
Policy Domain Name: EXCHANGE
Policy Set Name: EXCHANGE
Mgmt Class Name: EXCHANGE_MONTHLY
Copy Group Name: STANDARD
Copy Group Type: Backup
Versions Data Exists: No Limit
Versions Data Deleted: No Limit
Retain Extra Versions: No Limit
Retain Only Version: No Limit
Copy Mode: Modified
Copy Serialization: Shared Static
Copy Frequency: 0
Copy Destination: T10KMONEXCH
Table of Contents (TOC) Destination:
Last Update by (administrator): T2JPD
Last Update Date/Time: 05/04/07 10:52:48
Managing profile:
Changes Pending: No

My thought process is this. The number of backups(84) would be 1 monthly backup for 7 years. 12x7=84
The same number for retain extra versions.
The versions data deleted and retain only versions would be 2555 days. 365 days x 7 years = 2555.
I think I would change the copygroup policy to
Versions Data Exists: 84
Versions Data Deleted: 2555
Retain Extra Versions: 84
Retain Only Version: 2555

I would activate this policy change just before making the first monthly weekend backup. After the backup completes, I would then run expiration and check to make sure I have only 7 years of monthly backups.

Sorry for the length of this thread.
 

Raakin

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Looking good!

Only gotcha is the days, you are not considering leap year; so you will need to add one day for every four years (add one day for the first year, skip three years and then add a second day on the fifth year, so for 7 years you need to add two days).

Versions Data Exists: 84
Versions Data Deleted: 2557
Retain Extra Versions: 84
Retain Only Version: 2557
 

jackd

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Raakin,

Thanks for the quick reply. You're right on with the leap year thoughts.
 
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The Spectrum Protect TLA (Three-Letter Acronym): ISP or something else?

  • Every product needs a TLA, Let's call it ISP (IBM Spectrum Protect).

    Votes: 18 18.2%
  • Keep using TSM for Spectrum Protect.

    Votes: 61 61.6%
  • Let's be formal and just say Spectrum Protect

    Votes: 12 12.1%
  • Other (please comement)

    Votes: 8 8.1%

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