[hibernate-dev] Hibernate Search connecting to multiple Elasticsearch clusters

[Gunnar Morling]

Hi,

Good question, I have been wondering the same.

I think we could even support this 5.6, essentially it's just a matter
of structuring the properties and how we read them. I basically
started with a single cluster to get to something working more
quickly, but it shouldn't take long to change that now.

Only in the docs we need to make clear that index sharing / queries do
not work across cluster boundaries.

If we don't do it now, at least let's change the prop name into
"hibernate.search.default.elasticsearch.host" so it's not breaking if
we add support for index-specific overrides down the road.


--Gunnar

2016-03-08 12:55 GMT+01:00 Sanne Grinovero <sanne at hibernate.org>:
> Today our experiments are assuming we're connecting to a single
> Elasticsearch cluster: one hostname to configure, etc..
>
> I think this is an acceptable limitation for version 5.6 (our first
> stable milestone to support this integration) but I'm wondering if we
> should document it as a temporary limitation or as an intentional
> design.
>
> I think that eventually we should allow having different entities
> (indexes) to be stored on different ES clusters; this shouldn't be too
> hard to manage as the codebase is already structured around this
> capability of having different types in different "indexes"; so while
> a single Elasticsearch cluster can manage multiple indexes (that's a
> bit of a novel concept) I see no reason to not allow different indexes
> to be mapped on different clusters.
>
> = Am I missing some strong reason to not allow this?
>
> = While this will (likely) not be supported in 5.6, should the public
> API and configuration properties allow for this to be configured
> per-index already? (Changing it later would be a breaking change)
>
> See also:
>  - https://hibernate.atlassian.net/browse/HSEARCH-2164
>
> Thanks,
> Sanne
> _______________________________________________
> hibernate-dev mailing list
> hibernate-dev at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/hibernate-dev