Lucene.Net - IndexWriter.SetMergedSegmentWarmer [c

Question

Anyone have an example of how to use IndexWriter.SetMergedSegmentWarmer in Lucene.Net?

When I try something like...

IndexWriter.IndexReaderWarmer warmer = new IndexWriter.IndexReaderWarmer();
indexWriter.SetMergedSegmentWarmer(warmer);

I get

Cannot create an instance of the abstract class or interface 'Lucene.Net.Index.IndexWriter.IndexReaderWarmer'

Answer 1

Well, you should write your own. IndexWriter.IndexReaderWarmer is abstract class, so it doesn't provide warm up implementation. The purpose of this class is to define contract between IndexReader and IndexReaderWarmer so they can communicate appropriately.

Writing your own implementation is not easy task. You should decide how exactly you will warm the reader up. Several ideas:

• perform recently executed queries over new reader;
• perform static bunch of queries;
• perform FieldCache preload only.