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Rose is a database storage engine for high-throughput replication. It targets seek-limited, write-intensive transaction processing workloads that perform near real-time decision support and analytical processing queries. Rose uses Log Structured Merge (LSM) trees to create full database replicas using purely sequential I/O, allowing it to provide orders of magnitude more write throughput than B-tree based replicas. Also, LSM-trees cannot become fragmented and provide fast, predictable index scans. Rose's write performance relies on replicas' ability to perform writes without looking up old values. LSM-tree lookups have performance comparable to B-tree lookups.
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