What is Apache BookKeeper?

Apache BookKeeper is the distributed, replicated log storage system Pulsar uses to durably persist every message; it's a separate Apache project that predates Pulsar and provides low-latency, append-only storage.

Storage is organized into ledgers, split into entries; a ledger's entries are striped across multiple storage nodes called bookies according to configurable ensemble, write-quorum, and ack-quorum settings for durability.

Because BookKeeper - not the broker - owns durability, a broker can be replaced without any data movement, and bookies can be added or removed to scale storage independently of the compute layer.

Invest now in Acorns!!! 🚀
Join Acorns and get your $5 bonus!

Acorns is a micro-investing app that automatically invests your "spare change" from daily purchases into diversified, expert-built portfolios of ETFs. It is designed for beginners, allowing you to start investing with as little as $5. The service automates saving and investing. Disclosure: I may receive a referral bonus.

Invest now!!! Get Free equity stock (US, UK only)!

Use Robinhood app to invest in stocks. It is safe and secure. Use the Referral link to claim your free stock when you sign up!.

The Robinhood app makes it easy to trade stocks, crypto and more.

Webull! Receive free stock by signing up using the link: Webull signup.