[ANNOUNCE] Apache DistributedLog 0.4.0-incubating Release

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[ANNOUNCE] Apache DistributedLog 0.4.0-incubating Release

Sijie Guo-2
The Apache DistributedLog team would like to announce the release of Apache
DistributedLog 0.4.0-incubating.

Apache DistributedLog (incubating) is a high performance replicated log
store. It provides replicated-log as the storage primitive for building
real-time services. Its serves as a fundamental building block for
distributed applications that requires durability, replication and strong

The highlights of 0.4.0-incubating are:

- Refactor the codebase to abstract the core metadata and data operations
for the log store into interfaces. So developers can easily integrate
DistributedLog with other metadata stores like etcd, and integrate
DistributedLog with other cold data stores like HDFS, S3.
- A new read ahead implementation for the log reader to better handle slow
storage nodes.
- Provide the log stream placement policy on the proxy service, to develop
and experiment with different placement policies and integrate with
different auto-scaling mechanisms.

The release artifacts can be downloaded here:

All JIRAs completed for this release are tagged with 'FixVersion =
0.4.0-incubating'; the JIRA release notes can be found here:


Release notes are available at:


More details regarding Apache DistributedLog (incubating) can be found here:

We thank everyone who made this release possible.

The Apache DistributedLog Team



Apache DistributedLog is an effort undergoing incubation at The Apache
Software Foundation (ASF),
sponsored by the Apache Incubator PMC. Incubation is required of all newly
accepted projects until
a further review indicates that the infrastructure, communications, and
decision making process have
stabilized in a manner consistent with other successful ASF projects. While
incubation status is not
necessarily a reflection of the completeness or stability of the code, it
does indicate that the
project has yet to be fully endorsed by the ASF.