https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=43142

David Nind <[email protected]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Text to go in the|This enhancement adds a new |This enhancement adds a new
      release notes|local use system            |Elasticsearch related
                   |preference,                 |system preference,
                   |ElasticsearchReplicas, with |ElasticsearchReplicas, with
                   |the default value set to 0. |the default value set to 0.
                   |
                           |
                   |Technical details:
         |For Koha instances with
                   |
                           |single-node deployments of
                   |This overrides the          |Elasticsearch (the majority
                   |index.number_of_replicas    |of Koha installations), no
                   |value from                  |changes should be required.
                   |index_config.yaml
          |
                   |when creating indexes.
     |This setting should be
                   |
                           |reviewed where a more
                   |The previous hardcoded      |complex Elasticsearch
                   |default of 1 replica caused |configuration is in place.
                   |permanently yellow
         |
                   |cluster health on           |Technical details:
                   |single-node deployments     |
                   |(the majority of Koha
      |This overrides the
                   |installations) because      |index.number_of_replicas
                   |replica shards cannot be    |value from
                   |assigned without
           |index_config.yaml when
                   |additional nodes.
          |creating indexes.
                   |
                           |
                   |With the default of 0,      |The previous hardcoded
                   |single-node clusters get    |default of 1 replica caused
                   |green health status
        |permanently yellow cluster
                   |immediately after           |health on single-node
                   |reindexing. Multi-node      |deployments (the majority
                   |deployments can set the
    |of Koha installations)
                   |preference to 1 or higher   |because replica shards
                   |as needed.
                 |cannot be assigned without
                   |
                           |additional nodes.
                   |Changes take effect on the  |
                   |next reindex.
              |With the default of 0,
                   |
                           |single-node clusters get
                   |The index_config.yaml       |green health status
                   |default could also be       |immediately after
                   |changed to 0, with the      |reindexing. Multi-node
                   |system preference allowing  |deployments can set the
                   |organizations to increase   |preference to 1 or higher
                   |it. Either approach works,  |as needed.
                   |but the system preference   |
                   |is the important part for   |Changes take effect on the
                   |operational control.        |next reindex.
                   |                            |
                   |                            |The index_config.yaml
                   |                            |default could also be
                   |                            |changed to 0, with the
                   |                            |system preference allowing
                   |                            |organizations to increase
                   |                            |it. Either approach works,
                   |                            |but the system preference
                   |                            |is the important part for
                   |                            |operational control.

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