Binary metadata format

This patch adds a binary metadata format and bumps the metadata format
version to 3. The contents of the binary metadata is the same as the
contents of the text format for now. The difference is that the binary
is more compact, and the fields can be added to the metadata when
using the binary format, which isn't possible with the text
format. With the text format, parsing with a client that didn't
recognise the new field would fail.

For now, the text format (version 2) is still used by default. We will
provide a tool to allow administrators to bump to version 3.

Some tests have been modified to provide digest and password to the
builder. All protobuf metadata in released versions has had digest and
password (first protobuf metadata was in release-4.2.0). So if new
metadata is created or read with version 2, it will have this two
fields set.

Master issue: #723


Reviewers: Enrico Olivelli <eolivelli@gmail.com>, Matteo Merli <mmerli@apache.org>, Sijie Guo <sijie@apache.org>

This closes #1866 from ivankelly/binary-metadata
15 files changed
tree: ca6b9a04ea6ce5361e96a70edb9e5f17d86e95f3
  1. .github/
  2. .test-infra/
  3. .travis_scripts/
  4. bin/
  5. bookkeeper-benchmark/
  6. bookkeeper-common/
  7. bookkeeper-common-allocator/
  8. bookkeeper-dist/
  9. bookkeeper-http/
  10. bookkeeper-proto/
  11. bookkeeper-server/
  12. bookkeeper-stats/
  13. bookkeeper-stats-providers/
  14. buildtools/
  15. circe-checksum/
  16. conf/
  17. cpu-affinity/
  18. deploy/
  19. dev/
  20. docker/
  21. metadata-drivers/
  22. microbenchmarks/
  23. shaded/
  24. site/
  25. stats/
  26. stream/
  27. tests/
  28. tools/
  29. .gitignore
  30. .travis.yml
  31. LICENSE
  32. NOTICE
  33. pom.xml
  34. README.md
README.md

Build Status Build Status Coverage Status Maven Central

Apache BookKeeper

Apache BookKeeper is a scalable, fault tolerant and low latency storage service optimized for append-only workloads.

It is suitable for being used in following scenarios:

  • WAL (Write-Ahead-Logging), e.g. HDFS NameNode.
  • Message Store, e.g. Apache Pulsar.
  • Offset/Cursor Store, e.g. Apache Pulsar.
  • Object/Blob Store, e.g. storing state machine snapshots.

Get Started

  • Concepts: Start with the basic concepts of Apache BookKeeper. This will help you to fully understand the other parts of the documentation.
  • Getting Started to setup BookKeeper to write logs.

Documentation

Developers

You can also read Turning Ledgers into Logs to learn how to turn ledgers into continuous log streams. If you are looking for a high level log stream API, you can checkout DistributedLog.

Administrators

Contributors

Get In Touch

Report a Bug

For filing bugs, suggesting improvements, or requesting new features, help us out by opening a Github issue or opening an Apache jira.

Need Help?

Subscribe or mail the user@bookkeeper.apache.org list - Ask questions, find answers, and also help other users.

Subscribe or mail the dev@bookkeeper.apache.org list - Join development discussions, propose new ideas and connect with contributors.

Join us on Slack - This is the most immediate way to connect with Apache BookKeeper committers and contributors.

Contributing

We feel that a welcoming open community is important and welcome contributions.

Contributing Code

  1. See Developer Setup to get your local environment setup.

  2. Take a look at our open issues: JIRA Issues Github Issues.

  3. Review our coding style and follow our pull requests to learn about our conventions.

  4. Make your changes according to our contribution guide.

Improving Website and Documentation

  1. See Building the website and documentation on how to build the website and documentation.