Hi Jan,

Comments inline:

On Tue, Jun 12, 2018 at 2:19 AM Jan Høydahl <[EMAIL PROTECTED]> wrote:

Today, inactive slices also count towards the number of cores -- though
technically correct, it is probably an oversight.

The /autoscaling/suggestions end point only suggests if there are policy
violations. Preferences such as minimize:cores are more of a sorting order
so they aren't really being violated. After you add the rule, the framework
still cannot give a suggestion that satisfies your rule. This is because
even if shard1_1 is moved to node2, node1 still has shard1 and shard1_0. So
the system ends up not suggesting anything. You should get a suggestion if
you add a third node to the cluster though.

Also see SOLR-11997 <https://issues.apache.org/jira/browse/SOLR-11997> which
will tell users that a suggestion could not be returned because we cannot
satisfy the policy. There are a slew of other improvements to suggestions
planned that will return suggestions even when there are no policy

Shalin Shekhar Mangar.