Full text search - OpenSearch

Full Text Search - OpenSearch is an extension to the Full Text Search framework

It allows you to index your content into an OpenSearch instance.

Setup

To index files and documents, you need to install the ingest-attachment plugin before starting indexing.

The proper OpenSearch pipeline is automatically created when the local index is inited.

Configuration

There are many settings available; some are accessible through the web interface, others are intentionally accessible only by CLI.

php occ config:app:get fulltextsearch_opensearch CONFIG_NAME
php occ config:app:set --value NEW_VALUE fulltextsearch_opensearch CONFIG_NAME

Most of them are used while initing a new index on OpenSearch, so changing their value while using an existing collection has no effect.

fields_limit

Maximum number of fields in the index map.

https://docs.opensearch.org/latest/mappings/mapping-explosion/

Default: 10000

analyzer_filter

Comma-separated list of parameters for the analyzer's filter. To be used for fine tuning accordingly to the language of documents and data on the instance.

https://docs.opensearch.org/latest/analyzers/token-filters/index/

Default: "lowercase, stop, kstem"

max_token_length

To limit the length of accepted and indexed tokens, and skip hashes, encoded data or other informations not useful while searching.

https://docs.opensearch.org/latest/analyzers/token-filters/length/

Default: 40

index_codec

Can be used to adopt a compressed format for the index, in order to save some disk space.

https://docs.opensearch.org/latest/im-plugin/index-codecs/

Default: "default"