I'm doing "go-live" planning for prod-ELK, and i stumble upon few nice calculations formulas form official elastic webinar on "capacity planing and sizing".
I have few confusions in shards calcs based upon formula below:-
Total shards=number of index patterns x number of primaries x (number of replicas +1) x total interval of retention In my environment I have number of index patterns = 20 number of primaries = 5 number of replicas=5+1 total retention period =30
no of shards=18000
If I have two nodes, this will come down (20 index total) as 9000 shards per node to 450 shards per index.
I'm not sure about best practice but there is a performance limit on # of shards per index, if that will increasing the # of primaries help me manage it.