SDAEMDEV parameter
IODEV number for SDaemons
Summary
- Default value
- 0
- Parameter type
- System
- Where set
- User 0 CCAIN parameters
- Related products
- All
- Introduced
- Before Sirius Mods 6.7
Description
This parameter specifies the IODEV number to be used for SDAEMON (pronounced ess-demon) threads. These are special background threads (analogous to IODEV=3 threads) that operate without terminals and perform a variety of tasks, from running requests on behalf of users via $comm functions (see the Sirius Functions Reference Manual) or Daemon class requests, to Janus Web Server and other Janus server requests, to running as Janus Debugger or SirFact worker threads.
The value of the SDAEMDEV parameter must be an odd number between 1 and 53, and it must be different from the TNDEV parameter.
Note: Any IODEV number selected for SDAEMDEV will be unavailable for its normal function. The recommended setting for SDAEMDEV is 15 unless a site is using BTAM TTY terminals, which is exceedingly unlikely these days.
Once an SDAEMDEV value is defined, IODEV cards must be added for the threads that will run as SDAEMONs, just as IODEV cards are added for any other thread type supported by Model 204.
The correct number of IODEV cards depends on too many factors to provide any simple rules, but most sites should have at least 10, and then as many more as the maximum expected number of simultaneous Janus connections.
For more information about setting up SDAEMON threads, see the Sirius Mods Installation Guide.