what are the option to free up the log?
1. kill spid filling up log.
2. backup the tran log - to disk or truncate only or no_log.
3. change the database to simple recovery mode, delete ldf file and then revert back to full recovery mode.
4. detach database, delete log file and reattach mdf again.
I am especially interested to know if the last two are commonly used in case dba is not able to free up log using other ways.
thanks.