I've noticed that Hadoop MapReduce 1.0.4 was released in 12 October 2012,
and Hadoop 0.23.4 was released in 15 October 2012. I thought that with
Hadoop 1.0, the Hadoop 0.2X had become discontinued. If I want to start to
use Hadoop MapReduce, which version should I use?
What's the difference between Hadoop MapReduce 0.2X and Hadoop MapReduce
1.0?
--
Best regards,

There are two major release lines: 1.x and 2.x.

1.x is deemed stable and 2.x is considered alpha quality.

0.23.* is the last of 0.2X line. 0.23.* is used mostly by Yahoo! to stabilize the last code minus some features present in 2.x like some HDFS HA work, PB use in RPC layer etc.

Thanks,
+Vinod

On Oct 31, 2012, at 10:25 AM, Pedro Sá da Costa wrote:

> I've noticed that Hadoop MapReduce 1.0.4 was released in 12 October 2012, and Hadoop 0.23.4 was released in 15 October 2012. I thought that with Hadoop 1.0, the Hadoop 0.2X had become discontinued. If I want to start to use Hadoop MapReduce, which version should I use?
>
>
> What's the difference between Hadoop MapReduce 0.2X and Hadoop MapReduce 1.0?
>
>
> --
> Best regards,
>