Enable multiple-server support for each Tivoli® Storage Manager for Space Management client in the GPFS™ node, then add Tivoli Storage Manager servers to manage
the file system.
In a multiple-server environment, the
Tivoli Storage
Manager server to
which a file is backed up must be the server to which a file is migrated.
Before the upgrade, each file system on a GPFS cluster that is managed by a
Tivoli Storage Manager for Space Management client must be managed
by a single
Tivoli Storage
Manager server. That means that files on a file system must be
backed up and migrated to the same
Tivoli Storage
Manager server.
A
file system that is managed by multiple Tivoli Storage
Manager servers
must be GPFS version 3.4 or
later and must be enabled for Data Management Application Programming
Interface (DMAPI).
A single Tivoli Storage Manager for Space Management client can use only HSM daemons
(dsmmonitord and dsmscoutd)
or GPFS policy to manage automatic
migration. A Tivoli Storage
Manager for Space Management client cannot use both HSM daemons and GPFS policy to manage automatic
migration.
Multiple-server
support requires that automatic migration is driven by the GPFS policy engine. Before you upgrade
to multiple-server support, you must configure GPFS appropriately.
For information about configuring GPFS integration with the Tivoli Storage Manager for Space Management
client, see the Tivoli field
guide TSM for Space Management for UNIX-GPFS Integration Part
I: Policy-driven Threshold Migration at https://www.ibm.com/support/docview.wss?uid=swg27018848.
For information
about using the GPFS backup
command mmbackup with a file system that is space-managed
by multiple Tivoli Storage Manager servers, see the GPFS FAQs
topic in the IBM® Cluster Products
information center: http://publib.boulder.ibm.com/infocenter/clresctr/vxrx/topic/com.ibm.cluster.gpfs.doc/gpfs_faqs/gpfsclustersfaq.html.
The following steps enable a file system to be managed by
multiple servers.
- Set option hsmdisableautomigdaemons=YES for each Tivoli Storage Manager for Space Management clientin the GPFS cluster. Setting hsmdisableautomigdaemons=YES disables
the automatic migration daemons dsmmonitord and dsmscoutd. The dsmmonitord and dsmscoutd daemons do not drive automatic migration in a
multiple-server environment. If you do not disable the dsmmonitord and dsmscoutd daemons, they continue to run and
use system resources.
- Set option hsmmultiserver=YES for each Tivoli Storage Manager for Space Management clientin the GPFS cluster.
- Add to the list of servers the Tivoli Storage Manager server that currently
manages the file system by issuing the following command: dsmmigfs addmultiserver -server=server_name file_system_name. You can determine the Tivoli Storage Manager server that currently
manages the file system with the following command: dsmmigfs query -detail.
- Run the dsmMultiServerUpgrade.pl script.
The script couples all files on a file
system with the Tivoli Storage
Manager server that manages the migration copies and backup versions.
The script calls the dsmreconcile command to run
a special reconciliation that couples the files with the server.
- Optional: Add additional servers to manage
a file system. For each additional server, issue the following command: dsmmigfs addmultiserver -server=server_name file_system_name.
To query status of the multiple-server environment, issue
the following command: dsmmigfs querymultiserver file_system_name. You can add more Tivoli Storage Manager servers to the
list of servers that manage a file system.