An index optimization operation allows you to reduce the number of segments in an index, thereby increasing search performance in the index.
To perform this operation, there is an overload that takes the MergeOptions instance as a parameter. In the MergeOptions class, there is a method for specifying a cancellation object and a method for specifying whether to perform the operation asynchronously. By default, the operation is performed synchronously.
The following example demonstrates how to perform the index optimization.
String indexFolder = "c:\\MyIndex\\"; String documentsFolder1 = "c:\\MyDocuments1\\"; String documentsFolder2 = "c:\\MyDocuments2\\"; String documentsFolder3 = "c:\\MyDocuments3\\"; // Creating an index in the specified folder Index index = new Index(indexFolder); index.add(documentsFolder1); // Indexing documents from the specified folder index.add(documentsFolder2); // Each call to Add creates at least one new segment in the index index.add(documentsFolder3); MergeOptions options = new MergeOptions(); options.setCancellation(new Cancellation()); // Creating cancellation object to be able to cancel the operation options.getCancellation().cancelAfter(100000); // Setting maximum duration of the operation to 100 seconds // Merging segments of the index index.optimize(options);
You may easily run the code from documentation articles and see the features in action in our GitHub examples:
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