Deleting A Collection; Optimization Keywords; About Squeezing Deleted Documents - MACROMEDIA COLDFUSION MX 61 - CONFIGURING AND ADMINISTERING COLDFUSION MX Manual

Deleting a collection

The option deletes all documents in a collection, but does not delete the collection itself.
-purge
To delete a collection, use operating system commands, such as the rm command on UNIX, to
remove the collection directory structure and control files.

Optimization keywords

The following table describes the optimization keywords for the
Keyword Description
maxclean Performs the most comprehensive housekeeping possible, and removes out-of-date
collection files. Macromedia recommends this optimization only when you are
preparing an isolated collection for publication. When using this type, if the collection
is being searched, files sometimes get deleted too early, which can affect search
results.
maxmerge Performs maximal merging on the partitions to create partitions that are as large as
possible. This creates partitions that can have up to 64000 documents in them.
readonly Marks the collection as read-only and unchanged after the function call is done. This
is appropriate for CD-ROM collections.
spanword Creates a spanning word list across all the collection's partitions. A collection consists
of numerous smaller units, called partitions, each of which includes a word list.
Optionally, a spanning word list can be built with an ngram index.
ngramindex Builds an ngram index for the collection. An ngram index is designed to improve the
search performance for queries with the <TYPO> and <WILDCARD> operators. An
ngram index cannot be built without a spanning word list. You can build a spanning
word list and ngram index in the same command, for example:
mkvdk -collection collname -optimize spanword -ngramindex
squeeze Squeezes deleted documents from the collection. Squeezing deleted documents
recovers space in a collection, and improves search performance. (For more
information about squeeze, see
Using this option invalidates the search results.
vdbopt Configures the collection's Verity databases (VDBs). Each collection consists of
smaller units called VDBs. This keyword has the effect of linearizing the data in a
VDB, and making the collection metadata contained in the VDB more streamlined. It
also lets the VDB grow to a much larger size.
tuneup Performs the same as combining the maxmerge, vdbopt, and spanword keywords.
publish Performs the same as all of the optimization types combined. Use this keyword to
optimize the collection for the best possible retrieval performance, such as for
publication to a network on a server or on a CD-ROM.

About squeezing deleted documents

When a document is deleted from a collection, its space is not recovered. It is merely marked as
deleted and not available for subsequent searches. Squeezing actually removes deleted documents
from the collection's internal documents table and word indexes, thus creating a smaller collection
and reducing the collection's disk space. A smaller collection has a more efficient structure that
makes searching slightly faster and uses slightly less memory.
-optimize
"About squeezing deleted documents" on page
Getting started with the Verity mkvdk utility
option:
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