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PaxosStore

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PaxosStore is a distributed-database initially inspired by Google MegaStore. It's the second generation of storage system developed to support current WeChat sevice and applications. PaxosStore has been deployed in WeChat production for more than four years, providing storage services for the core businesses of WeChat backend including user account management, user relationship management (i.e., contacts), instant messaging, social networking (i.e., Moments), and online payment (i.e., WeChat Pay).

Now PaxosStore is running on thousands of machines, and is able to afford billions of peak TPS.

Prior to PaxosStore, we have been using a QuorumKV storage system to support various WeChat services with strongly consistent read/write since 2011. As the number of storage servers rises to tens of thousand, the operational mantenance and development of a NWR-based system in such a large scale become painful. That's why we come up with PaxosStore: a new generation of distributed database, built on top of the leaseless Paxos consensus layer, providing

The PaxosStore Architecture

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Please refer to the following publications for the technical details of PaxosStore.

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License

PaxosStore is under the BSD 3-Clause License. See the LICENSE.txt file for details.