Examples of org.apache.solr.update.DirectUpdateHandler2

org.apache.solr.update.DirectUpdateHandler2

DirectUpdateHandler2 implements an UpdateHandler where documents are added directly to the main Lucene index as opposed to adding to a separate smaller index. For this reason, not all combinations to/from pending and committed are supported. This version supports efficient removal of duplicates on a commit. It works by maintaining a related count for every document being added or deleted. At commit time, for every id with a count, all but the last "count" docs with that id are deleted.

Supported add command parameters:

allowDups	overwritePending	overwriteCommitted	efficiency
false	false	true	fast
true or false	true	true	fast
true	false	false	fastest

Supported delete commands:

command	fromPending	fromCommitted	efficiency
delete	true	true	fast
deleteByQuery	true	true	very slow*

* deleteByQuery causes a commit to happen (close current index writer, open new index reader) before it can be processed. If deleteByQuery functionality is needed, it's best if they can be batched and executed together so they may share the same index reader. @version $Id: DirectUpdateHandler2.java 1203770 2011-11-18 17:55:52Z mikemccand $ @since solr 0.9

    cmd.waitFlush = true;
    cmd.waitSearcher = true;
    solrCore.getUpdateHandler().commit(cmd);
    if (solrCore.getUpdateHandler() instanceof DirectUpdateHandler2) {
      LOG.info("Force open index writer to make sure older index files get deleted");
      DirectUpdateHandler2 handler = (DirectUpdateHandler2) solrCore.getUpdateHandler();
      handler.forceOpenWriter();
      replicationHandler.refreshCommitpoint();
    } else  {
      LOG.warn("The update handler is not an instance or sub-class of DirectUpdateHandler2. " +
              "ReplicationHandler may not be able to cleanup un-used index files.");
    }

    cmd.waitFlush = true;
    cmd.waitSearcher = true;
    solrCore.getUpdateHandler().commit(cmd);
    if (solrCore.getUpdateHandler() instanceof DirectUpdateHandler2) {
      LOG.info("Force open index writer to make sure older index files get deleted");
      DirectUpdateHandler2 handler = (DirectUpdateHandler2) solrCore.getUpdateHandler();
      handler.forceOpenWriter();
      replicationHandler.refreshCommitpoint();
    } else  {
      LOG.warn("The update handler is not an instance or sub-class of DirectUpdateHandler2. " +
              "ReplicationHandler may not be able to cleanup un-used index files.");
    }

Examples of org.apache.solr.update.DirectUpdateHandler2

Related Classes of org.apache.solr.update.DirectUpdateHandler2