Enterprise Search engine software-Lexst-SEA, this is a java based multi-node search engine software, which can be used as internet and intranet search engine software. Table data stores in data nodes, users can expand the cluster by adding more and more data nodes. Replication Lexst Database Cluster uses asynchronous replication, node would duplicate the data automatically in "suitable time". Scalability The cluster can expand to 20,000 nodes. Horizontal Partitioning partitions table across nodes by user's scheme Fault Tolerance With standby nodes watching. High availability Variable-width columns For 'char' type columns, allow users input unlimited length of characters.

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