Data backup and recovery

When you bring down the server normally, TM1® renames the log file by appending a time stamp to it, using the following naming convention: tm1s yyyymmddhhmmss.log. The tm1s.log file remains open while a TM1 server is running.

The time stamp, yyyymmddhhmmss, represents the current Greenwich Mean Time at the time the server was brought down. For example, if the server came down on January 2, 2002, at 2:30 PM, the name of the log file is tm1s20020102143000.log.

TM1 recovers the data automatically in the event that a server comes down abnormally, and leaves the tm1s.log file on the disk. The next time you bring up the server, TM1 recovers the changes in either of two ways:

Automatically recovers the changes -- when you are running the TM1 server as a Microsoft Windows service.
Prompts you to recover the changes -- when you are running the TM1 server as an application

If you intentionally shut down a TM1 server without saving the data, TM1 saves the transaction log with a time stamp and changes the file extension to .rej. For example, tm1s20020102143000.rej. The .rej log file ensures that you always have a record of the data transactions, even if you shut down the server without saving the data. If you accidentally shut down the server without saving the changes, you can process the .rej file through TurboIntegrator to recover the data.