BookKeeper has run in production at Yahoo, Twitter and Salesforce at scale for over 3 years, with petabytes of data stored

Seamlessly expand capacity to hundreds of nodes

Persistent message storage based on Apache BookKeeper. Provides IO-level isolation between write and read operations

Designed for low publish latency (< 5ms) at scale with strong durabilty guarantees

Designed for configurable replication between data centers across multiple geographic regions

Built from the ground up as a multi-tenant system. Supports Isolation, Authentication, Authorization and Quotas