Is it possible to do searching on two FESS instances?

(from github.com/seppjooo)
I have two instances of FESS running on two different ports.
FESS_cluster1: localhost:8085 (Indexed documents: 1)
FESS_cluster2: localhost:8086 (Indexed documents: 2)

By default, FESS searches on the index fess.YYYYMMDD, right?
Is it possible that FESS_cluster1 can also search at the same time on the indexed documents on the index fess.YYYYMMDD of FESS_cluster2?

See sample scenario below.

I want to know if I can display the search results based on the indexed documents of FESS_cluster1 and FESS_cluster2. Is this scenario possible?

(from github.com/marevol)

By default, FESS searches on the index fess.YYYYMMDD, right?

Fess uses fess.search for searching and fess.update for indexing.

Is it possible that FESS_cluster1 can also search at the same time on the indexed documents on the index fess.YYYYMMDD of FESS_cluster2?

Fess uses fess index on 1 elasticsearch cluster.

(from github.com/seppjooo)

Fess uses fess index on 1 elasticsearch cluster.

Is there a possibility to access the fess index of other elasticsearch cluster?

(from github.com/seppjooo)
I was able to perform search on multiple clusters using remote clusters with elasticsearch cross-cluster setup.

I also want to search multiple clusters with FESS. Is there a way on how to do this with FESS?

(from github.com/marevol)
I’m not sure if alias is available for cross cluster search.

(from github.com/seppjooo)

I’m not sure if alias is available for cross cluster search.

This is my cross-cluster setup.

I tried assigning alias on remote cluster index but it does not let me assign it.

Does this mean that multi cluster search is not possible with FESS?

(from github.com/marevol)
According to Search multiple remote clusters. it might work if changing index.document.search.index in fess_config.properties as below.

index.document.search.index=cluster2:fess.20190828

(from github.com/seppjooo)
@marevol It actually works. Thank you very much!