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How to Migrate Transaction Logs to a Backup Machine

To migrate a transaction log to a BACKUP machine, complete the following procedure.

  1. Start a tmadmin session by entering the following command: 
    tmadmin

  2. Shut down the servers in all the groups that write to the log, to prevent them from writing further entries.

  3. Dump the TLOG into a text file by running the following command: 
    dumptlog [-z config] [-o offset] [-n filename] [-g groupname]

    Note: The TLOG is specified by the config and offset arguments. The value of offset defaults to 0; name defaults to TLOG. If the -g option is chosen, only those records coordinated by the TMS from groupname are dumped.

  4. Copy filename to the BACKUP machine.

  5. Read the file into the existing TLOG for the specified machine by entering the following command: 
    loadtlog -m machine filename

  6. Force a warm start of the TLOG by entering the following command: 
    logstart machine

    The system reads the information in the TLOG and uses it to create an entry in the transaction table in shared memory.

  7. Migrate the servers to the BACKUP machine.

 

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