Igniters, After spending some time on baseline topology review, it came to my mind that we can return stateful affinity functions for persistent caches. Since now we will have a topology which is persisted to the cluster metastore, why not save the partition affinity distribution together with it?
If we have this distribution saved, we can use it after cluster restart, so the scenario which was broken with fair affinity is no longer valid. We will always have an old partition distribution and we will be able to consistently restore it after the cluster restart. As for the old colocation issue, we only need to define a way to 'compare' affinity functions for equality, then we can simply choose another cache's distribution. Do you think this makes sense and worth adding it to Ignite? If so, I will extends the baseline topology IEP with another phase. -- AG
