• Majordodo: Distributed Resource Manager uses Apache ZooKeeper and BookKeeper. http://majordodo.org/
  • Huawei: Uses BookKeeper as shared storage in Namenode HA.
  • HubSpot: Uses Bookkeeper in production at the core of its (custom) write-ahead-log service.
  • Twitter: Uses Bookkeeper as the core storage backend for replicated log service serving use cases like search ingestion, self-serve pub/sub system and strong consistent operations on distributed database.
  • Yahoo! Cloud Messaging: Uses BookKeeper to persist messages for guaranteed delivery.
  • Yahoo! Push Notifications: Hedwig is used to serve push notifications to mobile devices.
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