Codec Factory
A codecFactory
can be specified in solrconfig.xml
to determine which Lucene Codec
is used when writing the index to disk.
If not specified, Lucene’s default codec is implicitly used.
Alternatives to the Default Codec
There are two alternatives to Lucene’s default codec.
solr.SchemaCodecFactory
The solr.SchemaCodecFactory
supports 2 key features:
Schema based per-fieldtype configuration for
docValuesFormat
andpostingsFormat
- see the Field Type Properties section for more details.A
compressionMode
option:BEST_SPEED
(default) is optimized for search speed performanceBEST_COMPRESSION
is optimized for disk space usage
Example:
<codecFactory class="solr.SchemaCodecFactory">
<str name="compressionMode">BEST_COMPRESSION</str>
</codecFactory>
solr.SimpleTextCodecFactory
This factory for Lucene’s SimpleTextCodecFactory
produces a plain text human-readable index format.
FOR RECREATIONAL USE ONLY. This codec should never be used in production. SimpleTextCodec is relatively slow and takes up a large amount of disk space. Its use should be limited to educational and debugging purposes.
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Example:
<codecFactory class="solr.SimpleTextCodecFactory"/>