Ingesting data twice isn't a good option for us either so a store and forward configuration on a HF is now out of the question. I could see the individual IDX (non-clustered search peer) at the remote site working. If the main site SH goes down we can perform local searches on the remote standalone IDX. This site also has separate AD, DNS, etc. so it is a completely isolated environment. Maybe a single-stack non-distributed instance would work best here and if we decide we need HA we can stand up a distributed instance.
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