Each UNIX shared memory segment and semaphore is identified by a key. GT.M builds a unique key using a hash value generated by UNIX called an "ftok." The GT.M distribution includes a utility program called ftok, which is invoked by the command line ftok <filenames>. For each filename, ftok reports the corresponding key used by GT.M.
For database files, the keys will start with 0x43, and are reported by ftok for each database file.
For Journal Pools, the keys will start with 0x43, and are reported by ftok for the Global Directory that defines each instance.
For Receive Pools, the keys will start with 0x44, and are reported by ftok for the Global Directory that defines each instance (with the leading 0x43 replaced by 0x44).