Guralp Systems CD1.1 - Manual (Page 57)

Operator's Guide
•
cd11-timedb-tool - used to summarise or display
headers from the frames database maintained by the
CD1.1 multiplexer, data-mux-cd11.
•
cd11-frame-analyser-tool - used to dump and
decode a CD1.1 frame (or multiple frames), either as
they are received or selected by time-stamp.
•
cd11-management-tool - used to change the logging
level of any of the CD1.1 modules without restarting
them, and/or to change the authentication key ID.
All of these tools have detailed usage messages which are
accessible by invoking the tool with, as an argument, either -h
or --help.
9.2.1 cd11-backfilldb-tool
The CD1.1 sender, data-out-cd11, maintains a database of un-
transmitted or unacknowledged frames, which it uses to
perform back-fill. In normal operation with good network links,
this database is quite likely to be empty.
The command-line program cd11-backfilldb-tool allows the
listing, addition or removal of frames for which back-fill is to be
performed.
The back-fill database file for the first sender instance is
normally /var/lib/data-out-cd11.0/backfilldb - other
instances use similar path-names with the “0” incremented for
each instance. The tool should be invoked with the path to the
back-fill database as the last argument.
If no other arguments are given, the tool reports the most
recent frame time-stamp and the number of gaps (contiguous
sequences of missing frames) in the database:
eam999 # cd11-backfilldb-tool /var/lib/data-out-
cd11.0/backfilldb
Most recent timestamp : 2009-12-06T23:40:40Z
Number of missing ranges: 2
This is the same behaviour as when the -s (or --summary)
argument is given.
Giving the -d (or --detail) argument displays a table showing
the start and end time-stamps for each gap:
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