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Tivoli Space Manager for UNIX Using the Hierarchical Storage Management Clients

dsmwatchd

Valid on AIX GPFS file systems only. You must have root user authority to use this command.

Note:
Do not use this command from the console. During installation, it is added to /etc/inittab. The dsmwatchd command requires a living SP Group Services, and read/write access to shared HSM files within the SDR.

The dsmwatchd command manages failover activities for your local node. If failover is active on your local node, it checks the status of both the dsmrecalld command and the dsmmonitord command. If either of these daemons end, or becomes corrupted, dsmwatchd automatically recovers the failed daemon.

If two or more nodes within a GPFS node set participate actively in a failover environment, the dsmwatchd command either will take over the filesystems of a failed HSM node actively (remote is the same as within the local nodeset), or start the failover if the HSM client no longer can perform its operations locally. A node crash also can start failover. Unmounting a managed filesystem will not result in a failover. The failover environment is active by default. Use dsmmigfs enableFailover or dsmmigfs disableFailover to change the status.

In an active environment, the dsm.opt and dsm.sys files are shared between all nodes to guarantee that all nodes access the same TSM server. Even with a disabled failover envrionment, there is some communication between the different dsmwatchd commands to ensure that a GPFS filesystem is managed at least once. The dsm.opt and dsm.sys files can be different in this instance. Nodes with a different configuration no longer can participate in the failover environment. Starting failover will result in a configuration synchronization. The local dsm.opt and dsm.sys files are replaced with the corresponding SDR versions that are valid for failover.

Attention: The synchronization operations within the failover group creates backup copies with a timestamp of the configuration files. These copies are stored in the backup directory located in the DSM_DIR path and in /etc/adsm/SpaceMan/config.

Syntax

>>-dsmwatchd---------------------------------------------------><
 
 


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