IBM E16RMLL-I Implementation Guide - Page 432
Draining system activity before stopping the server
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Note: The QUIESCE option with the halt command is recommended only if you plan to do a database dump by using the dsmserv dumpdb command immediately after halting. Because Tivoli Storage Manager supports online database backup (backup db command), the dsmserv dumpdb command should rarely, if ever, be needed. Draining system activity before stopping the server To shut down the server without severely impacting administrative and client node activity with the server, we recommend taking some steps before actually issuing the halt command to the server: 1. Disable the server: Prevents new client node sessions from starting. Disabling new client sessions prevents users from establishing client node sessions with the server. This command does not affect current client sessions in progress or system processes like migration and reclamation. To disable client node access to the server, use the disable sessions command, as shown in Example 13-5. Example 13-5 Disable sessions tsm: ATLANTIC> disable sessions When you disable client sessions from the server, administrators can still access it, and current client node activity completes unless the user logs off or you cancel the client node session. You can issue the query status command to determine if the server is enabled or disabled. 2. Query for session information: Identify any existing administrative and client node sessions. When an administrator or client accesses Tivoli Storage Manager, either an administrative or client node session is established with the server. Each session is assigned a unique session number. You can see that because of the multi-threading features of the Tivoli Storage Manager client, node ATLANTIC has many active sessions with the server. To request information about client sessions, enter the query session command, as in Example 13-6. Example 13-6 Query session tsm: ATLANTIC> query session Sess Comm. Sess Platform Client Name Number Method State Wait Time ------ Bytes Bytes Sess Sent Recvd Type 402 IBM Tivoli Storage Manager Implementation Guide