Github user johnament commented on the issue:
https://github.com/apache/incubator-ponymail/issues/313
Not sure what you mean. Updating index settings w/ number of replicas has
always been configurable on the fly
https://www.elastic.co/guide/en/elasticsearch/guide/current/replica-shards.html
. Its purposely dynamic since a cluster is meant to grow/shrink. So yes, it
probably makes sense that the number of replicas defaults to 0.
Number of shards though is based on your data size, not a "test system" vs
"production system." See
https://www.elastic.co/guide/en/elasticsearch/guide/current/_index_settings.html
for info on setting the value. When you create an index, you can specify the
shard count -
https://www.elastic.co/guide/en/elasticsearch/reference/2.4/indices-create-index.html
- the way it was being done in the module isn't quite right, it's setting a
default for the entire node, but each index may need different shard counts.
E.g. a single shard may make sense for a single mailing list, or 6 months of
history, but when it comes to importing test data sets that span larger amounts
multiple shards may make sense (may make sense to use the standard
`ceil(doc_count/1000000)` function
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