MACROMEDIA COLDFUSION 5-ADVANCED ADMINISTRATION Manual page 168

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-refresh
Used for updating a collection, specifies that Verity Spider process only those
documents which qualify as follows:
When you re-run an existing indexing job, Verity Spider will automatically refresh the
collection. If you add or remove any of the starting points, however, you must
manually specify -refresh in order to refresh existing documents.
Note
You can also use -start to provide a starting point for Verity Spider. If you do not use
-start, then you should use at least one of -host, -domain, or -nofollow. For further
control, also see -refreshtime. If you do not use any constraint criteria, Verity Spider
will operate without limits and will likely index far more than you intended.
They are new documents in the repository, and they qualify for indexing under
the criteria.
They exist in the collection and are recorded in the Verity Spider persistent store
with a status of done. If Verity Spider determines that these indexed documents
have been updated in the repository, then they are retrieved again to be reparsed
and reindexed. Note that the document VdkVgwKey values do not change.
They are deleted in the collection. If Verity Spider determines that documents
have been deleted from the repository, then they are also deleted from the
persistent store and the collection. The exception to this rule is when you use
-nooptimize with -refresh. In this case, any document deleted from the
repository is marked for deletion in the collection. It will be removed from the
collection and the persistent store when the next indexing task is run for the
collection.
Chapter 8 Verity Spider