Does anyone know if there is an APAR for this? This just bit us in the
butt.... big time on a LAN-free Exchange restore.
Regards,
Matt Adams
Tivoli Storage Manager Team
Hermitage Site Tech
Deloitte and Touche USA LLP
Forum: ADSM.ORG - ADSM / TSM Mailing List Archive
Date: May 13, 02:25
From: Norback, Jan <Jan.Norback AT ATOSORIGIN DOT COM>
Sergey,
Yes, the LAN path isn't used! Thus the restore will fail when the object is
on disk. Even worse is that in our case it failed in the end of a large
restore after first having restored the online backups and in the end the
transaction logs that unfortunately were on a disk pool.
The following is part of the answer from IBM regarding this problem. There
is nothing in here about API/TDP but it gives you the idea about how
development seems to see this problem (feature). Of course we do not migrate
to disk in our case but the outcome is the same:
"Doc #1067224 - IBM Tivoli Storage Manager: Files not restorable in a
LAN-Free environment
Problem Desc: In a LAN-Free environment files that have migrated to storage
pools who's device classes are not SAN attached or accessible (such as
devclass DISK) can become un-retrievable to your LAN-Free enabled client
unless special actions are taken.
Solution: Files that are stored in storage pools that are not SAN attached
or accessible have to be moved over the LAN path. In most cases the
customer runs into a problem when attempting to restore a single active file
or and inactive copy of any number of files. The reason is that the
customer is not performing a 'no query restore'. A no query restore is
defined as any restore using an unrestricted wildcard source file
specification, and not using any of the options: INACTIVE, PICK, FROMDATE
or TODATE.
For example: dsmc restore /home/myfiles/*
A LAN-Free enabled client must use a 'non query restore' to enable a duel
session restore over LAN-Free. This duel session restore allows the client
to open more than one concurrent session. These 2 sessions allow the client
to retrieve data over the LAN-Free path and the LAN path on the same run.
In cases where a 'no query restore' is not possible then you will need to
retrieve files that are not LAN accessible by disabling 'enable lanfree'
from your dsm.sys (dsm.opt in windows) file.
Customers typically run into this problem for performance reasons. Small
files do not transfer efficiently over LAN-Free connections due to the meta
data overhead. Thus they set up policy so that small files are moved over
the LAN to a DISK storage pool. In order to reduce this problems impact TSM
administrators should migrate these DISK storage pools to a LAN-Free
accessible storage pool as soon as possible. "
Jan
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