We present Centiman, a system for high performance, elas-
\ntic transaction processing in the cloud. Centiman provides
\nserializability on top of a key-value store with a lightweight
\nprotocol based on optimistic concurrency control (OCC).
\nCentiman is designed for the cloud setting, with an archi-
\ntecture that is loosely coupled and avoids synchronization
\nwherever possible. Centiman supports sharded transaction
\nvalidation; validators can be added or removed on-the-fly in
\nan elastic manner. Processors and validators scale indepen-
\ndently of each other and recover from failure transparently to
\neach other. Centiman\u2019s loosely coupled design creates some
\nchallenges: it can cause spurious aborts and it makes it dif-
\nficult to implement common performance optimizations for
\nread-only transactions. To deal with these issues, Centiman
\nuses a watermark abstraction to asynchronously propagate
\ninformation about transaction commits through the system.
\nIn an extensive evaluation we show that Centiman pro-
\nvides fast elastic scaling, low-overhead serializability for
\nread-heavy workloads, and scales to millions of operations
\nper second.<\/p>\n","protected":false},"excerpt":{"rendered":"
We present Centiman, a system for high performance, elas- tic transaction processing in the cloud. Centiman provides serializability on top of a key-value store with a lightweight protocol based on optimistic concurrency control (OCC). Centiman is designed for the cloud setting, with an archi- tecture that is loosely coupled and avoids synchronization wherever possible. Centiman 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