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Writing the events out to (tape/disk) medium is done through data
streams (dp0's). A stream is defined by:
- the stream name
- the output device (disk file or tape drive)
- which triggers are written out
It is important to remember that the stream name and the tape device
can overlap in the following sense: Every disk/tape drive that is in
use will be controlled by a process. This process is attached to the
DD system over its FIFO, which it creates as it is born. The FIFO name
will be the same as the stream name. This means that e.g. two tape
drives with the same stream name will have their dp0 processes attached
to the same FIFO and therefore will share the events.
Three standard ways to write the events out are predefined: all events
to one tape, all events to one disk file, and the standard pass 0
setup. These configurations can be obtained using the default
``configure streams'' on the dp0 menu (see section basics).
Online software development
Sun Apr 23 22:04:26 EDT 1995