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Thanks, Laurie! Exactly what I wanted to know!
Dave - K1DJE
JTAlert will only consider deleted entries from
your Log during the Rebuild process if the "Crystal Ball" plugin
is installed and enabled ;)
Seriously, the "Rebuild Alert Database" is just that a "Rebuild"
not an update. The existing database is cleared, all entries
removed, and rebuilt from scratch using the result from your
physical Log (which now doesn't contain those deleted entries).
The Alert Database is independent of your B4 checks, it is only
used to determine if a decoded Callsign will generate one or
more Alerts based on your needs. All B4 checks are done against
your Log so any deleted Log entries will not generate B4's.
Except if you delete the Log entries while JTAlert is running
than there is a chance that JTAlert may be using a cached B4
check result rather than an explicit Log B4 lookup result.
JTAlert caches B4 checks for performance reasons. A cache
(memory) lookup is orders of magnitude faster than a slow
disk-based Log lookup.
de Laurie VK3AMA