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For the support of Watchdog/SNS, it might be better to check in their
notesfile. It's at NOTED::SNS. From what I've seen, patches are still
being generated. Not sure if actual new versions of the product are in
the plan.
Now, the GENERAL concept of PCM and SNS are SIMILAR. They differ in
that PCM is intended to primarily monitor the CONSOLE interface of a
system being monitored. The data that flows from this interface can
be checked against event entries in the scan profiles and alarms are
generated to alert humans that something has happened that they need to
check. It doesn't seem that PCM is intended to do as much as
Watchdog/SNS, nor in the same way.
Watchdog/SNS differs in that monitored nodes (clients) have a process
running (SNS$WATCHDOG). The monitoring node (consolidator) checks
"items" that you want to "watch" by communicating with that process.
The consolidator can (at least):
1) check for the presence of some particular process(es)
2) monitor disk space
3) monitor error rates
Watchdog doesn't seem to be as robust in some of these as is AMDS, but
for the most part it does it's job well. Both PCM and SNS have several
ways to customize. We're using PCM, SNS and AMDS to monitor our
production systems. Each product seems to have a pretty clear purpose
that it's designed for, and there are some overlaps in those designs.
Sorry if the descriptions are rather general...
bob
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