ADSM-L

Re: Retention of backup versions

2006-07-14 13:40:33
Subject: Re: Retention of backup versions
From: "Prather, Wanda" <Wanda.Prather AT JHUAPL DOT EDU>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Fri, 14 Jul 2006 13:39:12 -0400
OK, I"ll bite.  
As I read it we have:

VERDATAEXISTS=5
RETEXTRA=30

Everybody take a shot at this:

Day 1:  File is backed up
Day 2:  File is backed up.  Backup from Day 1 is marked Inactive.
Day 3:  File is backed up.  Backup from Day 2 is marked inactive.
Day 4:  File is backed up.  Backup from Day 3 is marked inactive.
Day 5:  File is backed up.  Backup from Day 4 is marked inactive.
Day 6.  Nothing happens.  You have 5 backups of the file, 1 active, 4
inactive.
Day 7.  Nothing happens.  You have 5 backups of the file, 1 active, 4
inactive.
Day 8.  Etc.

Day 32 File from Day 1 has been inactive for 30 days, becomes
unavailable.
            When expiration runs, it is purged from the data base.
Day 33 File from Day 2 has been inactive for 30 days, becomes
unavailable.
            When expiration runs, it is purged from the data base.
Day 34 Ditto for Day 3 file
Day 35 Ditto for Day 4 file
Day 36 Nothing happens.  You have 1 backup remaining, from Day 5.
Day 37 Nothing happens.
Day 38 etc.
.
Day 91 File is changed/backed up again.  Backup from Day 5 is marked
inactive.
Day 92 Nothing happens.  You have 2 backups.
Day 93 Nothing happens.  You still have 2 backups.

Day122 Backup from Day 5 has been inactive for 30 days, becomes
unavailable.
             When expiration runs, it is purged from the data base.  You
have 1 backup.






                       

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Yiannakis Vakis
Sent: Friday, July 14, 2006 6:16 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Retention of backup versions

I'm sure this question has been asked many times but I want to be sure
what
is going on:

A mgnt class has been defined so that 5 versions of a file are kept,
with a
retention of 30 days.
A file that is changed daily is backed up for 5 consecutive days. The
next
backup is taken 3 months later.
What happens to the inactive files?
Thanks
Yiannakis


Yiannakis Vakis
Storage and Database Administration
Systems Support Group, I.T.Division
Tel. +357-22-848523
Mob. +357-99-414788
Fax. +357-22-337770

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