Jepsen: YugaByte DB 1.1.9

BRANK

BackgroundYugaByte DB is an open-source, multi-model, distributed database. It includes a sharded, transactional document store wrapped by multiple interfaces supporting YCQL (a query language derived from Cassandra’s CQL), and SQL (presently in beta) APIs. Intended for high-performance systems of record, YugaByte DB is specifically designed for replication across datacenters worldwide.There are two classes of nodes in YugaByte DB: masters, and tablet servers. A small number of masters control overall cluster topology, shard assignment, system metadata, and so on. Tablet servers store the actual data records, which are grouped into shards, which YugaByte DB calls tablets. Both masters and tablet servers use the Raft consensus algorithm to replicate their state: masters form a single Raft group, and each shard is backed by its own Raft group running on a subset of tablet servers.In geographically replicated deployments, nodes in each Raft group are spread across datacenters to provide…