We are attempting to build a system that gets a list of task to execute from a Cassandra database and then through some kind of group consensus creates an execution plan (preferably on one node) which is then agreed on and executed by the entire cluster of servers. We really do not want to add any additional pieces of software such as Redis or a AMPQ system, rather have the consensus built directly into all of the servers running the jobs. So far we have found Skiff, an implementation of the Raft algorithm that looks like it could accomplish the task, but I was wondering if anyone has found an elegant solution to this problem in a pure Node.js way not involving external messaging systems.
Distributing scheduled tasks across multi-datacenter environment in Node.js with Cassandra
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Cassandra supports lightweight transactions, which is basically Paxos implementation that offers linearizable consistency and CAS operation (consensus). So you can use Cassandra itself to serialize the execution plan.