Seamlessly switch Lucene indexes to avoid search downtime during re-indexing

(For those of you who don’t already know, John West is the Sitecore person. He wrote the book on Sitecore development, and his blog in particular is a treasure trove of Sitecore knowledge. He’s also an all-around nice guy, which I suppose fits his role as a technological evangelist; he’s always lending a hand to someone.)

During our current Sitecore upgrade, I found this gem: using the Lucene subdirectory-switching feature, via Sitecore.ContentSearch.LuceneProvider.SwitchOnRebuildLuceneIndex , allows for zero downtime when re-indexing in a production environment. Note that due to the use of two indexes, it may be necessary to rebuild twice when implementing indexing changes.

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