This is the 20th release of Apache BookKeeper!

The 4.10.0 release incorporates hundreds of bug fixes, improvements, and features since previous major release, 4.9.0.

Apache BookKeeper/DistributedLog users are encouraged to upgrade to 4.10.0. The technical details of this release are summarized below.

News and noteworthy

  • [https://github.com/apache/bookkeeper/pull/2069] Use pure python implementation of MurmurHash
  • [https://github.com/apache/bookkeeper/pull/1934] Bump Netty and GRPC version
  • [https://github.com/apache/bookkeeper/pull/1907] Add new bkctl shell tool
  • [https://github.com/apache/bookkeeper/issues/1602] Cluster Metadata Checker
  • [https://github.com/apache/bookkeeper/pull/2154] Auto refresh TLS certificate at bookie-server
  • [https://github.com/apache/bookkeeper/pull/2150] Improve journal throughput when journalSyncData is disabled.
  • [https://github.com/apache/bookkeeper/pull/2147] Journal should respect to flushWhenQueueEmpty setting
  • [https://github.com/apache/bookkeeper/pull/2132] Make default Bookie scripts work on JDK11+
  • [https://github.com/apache/bookkeeper/pull/2128] Allow to override default SASL service name ‘bookkeeper’
  • [https://github.com/apache/bookkeeper/pull/2117] BookKeeper Admin API: Implement a method to get all the Bookies
  • [https://github.com/apache/bookkeeper/pull/2111] Ensure getStickyReadBookieIndex returns valid bookie index

Full list of changes

Apache BookKeeper 4.10.0 Release Notes

An entry is a sequence of bytes (plus some metadata) written to a BookKeeper ledger. Entries are also known as records.

A ledger is a sequence of entries written to BookKeeper. Entries are written sequentially to ledgers and at most once, giving ledgers append-only semantics.

A bookie is an individual BookKeeper storage server.

Bookies store the content of ledgers and act as a distributed ensemble.

A subsystem that runs in the background on bookies to ensure that ledgers are fully replicated even if one bookie from the ensemble is down.

Striping is the process of distributing BookKeeper ledgers to sub-groups of bookies rather than to all bookies in a BookKeeper ensemble.

Striping is essential to ensuring fast performance.

Striping is the process of distributing BookKeeper ledgers to sub-groups of bookies rather than to all bookies in a BookKeeper ensemble.

Striping is essential to ensuring fast performance.

A journal file stores BookKeeper transaction logs.

When a reader forces a ledger to close, preventing any further entries from being written to the ledger.

A record is a sequence of bytes (plus some metadata) written to a BookKeeper ledger. Records are also known as entries.