[Checkins] SVN: Products.QueueCatalog/trunk/Products/QueueCatalog/README.txt added

[Andreas Jung]

Log message for revision 86697:
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  A   Products.QueueCatalog/trunk/Products/QueueCatalog/README.txt

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Added: Products.QueueCatalog/trunk/Products/QueueCatalog/README.txt
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--- Products.QueueCatalog/trunk/Products/QueueCatalog/README.txt	                        (rev 0)
+++ Products.QueueCatalog/trunk/Products/QueueCatalog/README.txt	2008-05-13 10:54:25 UTC (rev 86697)
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+A QueueCatalog delegates most requests to a ZCatalog that is named as part of the QueueCatalog configuration.
+
+Requests to catalog or uncatalog objects are queued. They must be processed by a separate process (or thread).
+
+The queuing provides benefits:
+
+* Content-management operations, performed by humans, complete much faster, this making the content-management system more effiecient for it's users.
+* Catalog updates are batched, which makes indexing much more efficient.
+* Indexing is performed by a single thread, allowing more effecient catalog document generation and avoiding conflict errors from occuring during indexing.
+* When used with ZEO, indexing might e performed on the same machine as the storage server, making updates faster.
+
+