1. Encapsulate topology access in a dedicated function.
2. Remove obsolete CachedCell

Georgy Moshkin authored 2 years ago and Georgy Moshkin committed 2 years ago

replication_factor now goes into cluster_state

Georgy Moshkin authored 2 years ago and Georgy Moshkin committed 2 years ago

It prints the raft log in a concise and readable way

Initially, JoinResponse was supplied with every single peer in cluster.
If the cluster is big enough, it results in the "max tuple size limit
reached" error. In fact, only voters are needed for the raft to
operate normally.

Previously the discovery algorithm would try to reach each known peer
sequentially requiring each consequent request to succeed until the next
one can be attempted. This would not work in some cases (see test in
previous commit).

So the new algorithm instead makes a single attempt to reach each peer
within a round, and if some failed they're retried in the next round of
requests. This allows overall discovery to succeed in cases when some
of the initial peers never respond.

Closes #54