Does anyone happen to know if Multisite search head clustering is suppported in ES 6.x? The validated architectures document says not, but it was written in 2018. Reading the release notes of 6.0, 6.0.1 and 6.1 it sounds like there have been ajustments to the way it handles SHC knowledge objects but I don't know if this changes the advice from the validated design docs.
"a single dedicated search head cluster contained within a siteis required to deploy the app . ES requires a consistent set of runtime artifacts to be available and this cannot be guaranteed in a stretched SHC when a site outage occurs. To be able to recover an ES SH environment from a site failure, 3rd party technology can be used to perform a failover ofthe search head instances, or a "warm standby" ES SH can be provisioned and kept in synch with the primary ES environment.