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From Bikas Saha <bi...@hortonworks.com>
Subject [ANNOUNCE] Apache Tez 0.5.0
Date Fri, 05 Sep 2014 05:20:35 GMT
The Apache Tez team is proud to announce the release of Apache Tez version

The Apache Tez project is aimed at creating a framework to build efficient
and scalable data processing applications that can be modelled as data flow

Tez 0.5.0 is a developer focused release that stabilizes the APIs and
improves the debugging experience for Tez applications. The following items
outline the important features of this release

1)      Stable APIs - The core DAG and Runtime APIs have been marked stable
and will be compatibly supported going forward. So developers can take a
dependency on these APIs. The convention is that classes,  methods
configuration that have been explicitly annotated as @Public and @Stable
are going to be compatible. Classes, methods and configurations that have
been marked @Evolving and @Unstable may continue to change going forward.
Classes, methods and configurations that have been marked @Private are not
to be used.

2)      Documentation - This release produced the first javadocs for Tez
and a number of tutorial like examples have been added to learn the APIs

3)      Local mode execution - Tez applications can be run without running
a cluster. This mode is to be used for debugging the application locally.

4)      Performance debugging tools - New tools like swimlanes analysis
have been added to help in debugging the performance of Tez applications

5)      Support for ACLs - Tez now supports ACLs for fine grained access
control to view and modify DAGs.

6)      New intermediate data format - Initial support for a new data
format for intermediate Key Value data for better performance.

7)      Added UnorderedPartitionedOutput - This new output was added to
write key value data into partitions with the data being unordered in these

In addition there have been a number of performance and stability
improvements made. For full details please look at CHANGES.txt in the
release artifacts.

There are a number of incompatible changes in this release. For a full
list, please look at CHANGES.txt in the release artifacts. Important
incompatible configuration changes have been outlined the release notes

The release bits are at: http://www.apache.org/dyn/closer.cgi/tez.

We would like to thank all the contributors who made the release possible.


The Tez Team

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