Adds or removes DocValues to or from existing fields in a Lucene/Solr index, without full re-index.
Fields in Lucene/Solr can be indexed, stored and DocValued. DocValued fields are used for functions requiring fast bulk access to field content. Faceting and sorting are examples. DocValues is enabled on a per-field basis. Normally a full re-index of the Lucene/Solr index is required if one want to enable DocValues for a field.
- JDK 1.7
- Maven 3 (Maven 1 or 2 might also work)
- A Lucene 4.8-readable index
The current implementation is highly experimental!
All DocValues-types are now supported, and a test on a 900GB index appears to be successful. Only fields with stored values can currently be converted to DocValues. The conversion requires all unique values of DV-needing String fields to be stored in-memory in a TreeSet, which is fairly memory-intensive.
Clone the repository and build a dependency including JAR with
mvn install assembly:assembly
To start the GUI, run
java -Xmx512m -jar target/dvenabler-1.0-SNAPSHOT-jar-with-dependencies.jar
To use the command line interface, call
java -Xmx512m -cp target/dvenabler-1.0-SNAPSHOT-jar-with-dependencies.jar dk.statsbiblioteket.netark.dvenabler.Command -h
Developed by Thomas Egense (teg@statsbiblioteket.dk) and Toke Eskildsen (te@statsbiblioteket.dk) 2014. Feel free to send emails with comments and questions.