[jhugg]

Re VoltDB:

>In VoltDB, all replicas for a given shard are updated synchronously by the client application. This is where VoltDB pays a significant performance penalty for write operations when compared with Raft/Paxos-powered distributed SQL databases. Distributed consensus protocols like Raft and Paxos require writes to be sent to all replicas but commit as soon as a majority of replicas have acknowledged the request. Waiting for all replicas to respond is not necessary since the consensus can be established with a majority. Additionally, VoltDB does not detect network partitions by default and requires a special network-fault-protection mode to be configured. When a node of the cluster gets partitioned, the network-fault-protection mode comes into play. It negatively impacts cluster performance by increasing cluster recovery time for not only accepting writes on the shards whose replica was lost in the node partition but also for repopulating the data on the partitioned node when it joins back the cluster.

Wow. Basically none of that is true.

[colanderman]

Ya. The stuff on NuoDB is basically all untrue or misleading as well (source: I work there). I wouldn't put too much stock in this self-promotion article.