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CHANGELOG.md

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v3.2 (TBD)

Dragonboat v3.2 is a minor release with new features and improvements. All v3.1.x users are recommended to upgrade.

New features

  • Added snappy compression support for Raft entires and snapshots.
  • C++ binding has been updated to cover all v3.x features. Thanks JasonYuchen for working on that.

Improvements

  • Removed the restriction on max proposal payload size.

Breaking changes

There is no breanking change for regular users. However,

  • If you have built customized transport module implementing the raftio.IRaftRPC interface, there is minor change to the config.RaftRPCFactoryFunc type. See github.com/lni/dragoboat/config/config.go for details.
  • The internal transport module has been updated, it is no longer compatible with earlier versions of dragonboat.

v3.1 (2019-07-04)

Dragonboat v3.1 is a maintenance release with breaking change. All v3.0.x users are recommended to upgrade. Please make sure to carefully read the CHANGELOG below before upgrading.

Bug fixes

  • Fixed ImportSnapshot.

New features

  • Added NodeHostConfig.RaftEventListener to allow user applications to be notified for certain Raft events.

Improvements

  • Made restarting an existing node faster.
  • Immediately return ErrClusterNotReady when requests are dropped for not having a leader.

Breaking changes

  • When upgrading to v3.1.x from v3.0.x, dragonboat requires all streamed or imported snapshots to have been applied. github.com/lni/dragonboat/tools/upgrade310 is provided to check that. See the godoc in github.com/lni/dragonboat/tools/upgrade310 for more details. For users who use NodeHost.RequestSnapshot to export snapshots for backup purposes, we recommend to re-generate all exported snapshots once upgraded to v3.1.

v3.0 (2019-06-21)

Dragonboat v3.0 is a major release with breaking changes. Please make sure to carefully read the CHANGELOG below before upgrading.

New features

  • Added on disk state machine (statemachine.IOnDiskStateMachine) support. The on disk state machine is close to the concept described in the section 5.2 of Diego Ongaro's Raft thesis.
  • Added new API for requesting a snapshot to be created or exported.
  • Added the ability to use exported snapshot to repair permanently damaged cluster that no longer has majority quorum.
  • Added new API for cleaning up data and release disk spaces after a node is removed from its Raft cluster.
  • Added the ability to limit peak memory usage when disk or network is slow.
  • Added Go module support. Go 1.12 is required.

Improvements

  • Further improved self checking on configurations.
  • Added snapshot binary format version 2 with block base checksum.
  • Synchronous variants have been provided for all asynchronous user request APIs in NodeHost.

Breaking changes

  • The Drummer package has been made invisible from user applications.
  • The statemachine.IStateMachine interface has been upgraded to reflect the fact that not all state machine data is stored in memory (#46).

v2.1 (2019-02-20)

New features

  • Added support to store Raft Logs in LevelDB.

v2.0 (2019-01-04)

Initial open source release.