MOMI has the ability to store many of its statistics for later review. This feature is activated by enabling it in the CONFMOMI file. By defining a history file, MOMI will automatically create and begin recording predetermined statistical information. If a file fills up, either for lack of disk space or maximum extents, the oldest data is automatically deleted to make room for newest data.
Up to four history files may be created. These are referred to as HST01DB -> HST04DB. History is initially written to HST01DB and then consolidated into the other files at different intervals. This gives the User the ability to maintain high resolution history for a short period of time and lower resolution history for a longer period of time.
The line to define each history file name (HSTnnDB) is the only line required. Other history attributes all have default values.
History is configured on the NonStop as follows:
1. Determine the disk volume(s) where the history files are to reside.
2. Edit CONFMOMI and un-comment out or add the following lines (HST01DB is required, others optional):
== MOMI History Files
HST01DB $vol.subvol.HST01DB
HST02DB $vol.subvol.HST02DB
HST03DB $vol.subvol.HST03DB
HST04DB $vol.subvol.HST04DB
3. Optional - add keyword(s) : HSTnnDB-DELETE-TIME
4. Optional - add keyword(s) : HSTnnDB-HISTORY-DUMP
5. Start (or restart) MOMI via the TACL obey file OBYMOMI.
History files are created automatically. If a file fills up, its oldest data in the file is automatically deleted to make room for newest data.