ADSM backing up the same data twice
1998-06-18 00:40:10
There was a thread a while back where the Solaris ADSM v3 client was
skipping directories during incremental backups.
The problem is described in APAR IC20712 and APAR IC20907. A new version of
the client code (IP21297T2) was made available for download from the IBM
FTP server.
I have installed the new code and it does fix the problem of ADSM skipping
directories, however I have found a significant change in the way the V3
client works compared with the way the V2 client works.
In summary the ADSM v3 client can backup the same data TWICE.
For example.... we are using the automounter to mount home directories onto
the /home mount point.
I am seeing ADSM backup the /export/home1/x directory AND the /home/x
directory.
I was expecting ADSM to backup only /export/home1/ not the mount point
/home/x
This is the response from IBM......quote
-----FS-------+dir++-file-
/export/home1/uXXXX/fileXX
.
-----FS-----+file+
/home/uXXXX/fileXX
.
/home/uXXXX is pointing to /export/home1/uXXXX similar to a symbolic
link (without the option FOLLOWSYMBOLIC=NO) as a filesystem of type
LOFS. Now when ADSM is doing it's incremental it doesn't detect the
LOFS filesystem type and thus is backing up the files from both
filesystems it finds. This is a known restriction with this situation
(since version 2 already) and there are plans by another customer to
open a DCR on that.
.....unquote
I do not know if this problem is a SUN solaris problem only or if it works
in this way on other unix platforms. IBM are saying that it is working as
designed and to open a data change request (DCR)
Our environment is
ADSM server O/S: OS/390 2.4
ADSM server: ADSM for MVS 2.1.0.13
ADSM client O/S: Sun Solaris 2.5.1
ADSM client: 3.1.0.3
Regards
Gavin
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