ADSM-L

Directory path backed up again and again ...

2005-03-08 09:53:04
Subject: Directory path backed up again and again ...
From: PAC Brion Arnaud <Arnaud.Brion AT PANALPINA DOT COM>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Tue, 8 Mar 2005 15:52:37 +0100
Hi *SM'ers,

I recently found that one (surely others too) of our AIX clients was
getting part of it's directory structure backed up everyday although it
did not change, but can't find the reason why. 

As Andy says it in his excellent web page : A normal Incremental Backup
will *not* back up directories whose timestamp has changed since the
last backup.

We're performing incremental backups, copymode used for this client is
set to modified, so I can't understand what's happening ! The worse is
that the mgmt-class having the longest retention period (retonly 768) in
this domain is used for storing that data, so I end up with thousands
(probably more if other servers are affected !) entries in TSM DB which
are worthless.

This in an example of what I get, using "show version" (snippet of it)
on this server:

/export/mksysb : / (MC: BACKUP_2_YEARS)
Inactive, Inserted 01/07/05 20:51:51, Deactivated 01/10/05 20:37:15
ObjId: 0.539953678, GroupMap 00000000, objType 0x01

/export/mksysb : / (MC: BACKUP_2_YEARS)
Inactive, Inserted 01/10/05 20:37:15, Deactivated 01/12/05 20:37:32
ObjId: 0.541340571, GroupMap 00000000, objType 0x01

/export/mksysb : / (MC: BACKUP_2_YEARS)
Inactive, Inserted 01/12/05 20:37:32, Deactivated 01/14/05 20:37:16
ObjId: 0.542636928, GroupMap 00000000, objType 0x01

/export/mksysb : / (MC: BACKUP_2_YEARS)
Inactive, Inserted 01/14/05 20:37:16, Deactivated 01/15/05 20:38:31
ObjId: 0.544018035, GroupMap 00000000, objType 0x01

/export/mksysb : / (MC: BACKUP_2_YEARS)
Inactive, Inserted 01/15/05 20:38:31, Deactivated 01/16/05 20:38:29
ObjId: 0.544640259, GroupMap 00000000, objType 0x01

/export/mksysb : / (MC: BACKUP_2_YEARS)
Inactive, Inserted 01/16/05 20:38:29, Deactivated 01/17/05 20:38:53
ObjId: 0.545097616, GroupMap 00000000, objType 0x01

This is a NIM server, where "MKSYSB" files from other servers are stored
everyday, so the content of the directory is changing, but not it's
structure.

TSM server is at 5.2.2.1 on AIX 5.2, client is 5.2.3.1,on AIX  5.3

Could someone tell me what is happening here, and how to avoid this ?
TIA.


Arnaud 

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