apache/bookkeeper

Health v2 · maintenance only

Adoption not part of the score

2009 stars · 973 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Apache BookKeeper is a scalable, fault-tolerant, low-latency distributed storage service optimized for append-only workloads, offering replication, durability, and strong consistency. It serves as the underlying log storage for systems like Apache Pulsar, HDFS NameNode WAL, and Pravega.

Use cases

• store write-ahead logs for distributed systems like HDFS NameNode
• persist message streams for a pub-sub messaging system
• store offsets and cursors for message consumers
• replicate state machine snapshots and blobs
• build a scalable distributed log with strong consistency guarantees

When to choose

• you need durable, replicated append-only log storage with low latency
• you are running Apache Pulsar or Pravega and need its storage layer
• you need a write-ahead log for a distributed database or state machine

When to avoid

• you need general-purpose SQL queries or rich secondary indexes
• your workload is read-heavy with random access patterns rather than append-only
• you want a simple single-node embedded database

Facets

service · maturity stable

database message-queue logging streaming databases microservices big-data jvm self-hosted append-only-storage write-ahead-logging replication distributed-log apache pulsar-storage low-latency messaging linux docker

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markdown · JSON · MCP: product_card(name="apache/bookkeeper")