Aleksey Charapko

Raft

  • Reading Group. Fault-Tolerant Replication with Pull-Based Consensus in MongoDB

    Aleksey Charapko

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    In the last reading group meeting, we discussed MongoDB‘s replication protocol, as described in the “Fault-Tolerant Replication with Pull-Based Consensus in MongoDB” NSDI’21 paper. Our reading group has a few regular members from MongoDB, and this time around, Siyuan Zhou, one of the paper authors, attended the discussion, so we had a perfect opportunity to…

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  • Reading Group. Protocol-Aware Recovery for Consensus-Based Storage

    Aleksey Charapko

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    Our last reading group meeting was about storage faults in state machine replications. We looked at the “Protocol-Aware Recovery for Consensus-Based Storage” paper from FAST’18.  The paper explores an interesting omission in most of the state machine replication (SMR) protocols. These protocols, such as (multi)-Paxos and Raft, are specified with the assumption of having a…

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  • Reading Group. Paxos vs Raft: Have we reached consensus on distributed consensus?

    Aleksey Charapko

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    In our 54th reading group meeting, we were looking for an answer to an important question in the distributed systems community: “What about Raft?” We looked at the “Paxos vs Raft: Have we reached consensus on distributed consensus?” paper to try to find the answer. As always, we had an excellent presentation, this time by…

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  • Consensus with Raft Algorithm

    Aleksey Charapko

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    When we talk about consensus in a distributed system, we talk about a system consisting of multiple machines that act as one state machine yet capable of surviving failures of some of the system nodes. Consensus algorithms are designed to enforce all distributed nodes have the same state so that the distributed system can tolerate…

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