0 - unrelated to RedLock algorithm, since RedLock has its own replication in the protocol.
1 - I replied in a blog post refusing most of the arguments, and then there was maybe another reply. You may want to read the full thing to form an idea about the safety of RedLock.
1 - I replied in a blog post refusing most of the arguments, and then there was maybe another reply. You may want to read the full thing to form an idea about the safety of RedLock.