[ANNOUNCE] Apache HBase 2.1.0 is now available for download

[Duo Zhang <zh...@apache.org>]

Resend since the first one is rejected by the announce@apache.org...

The HBase team is happy to announce the immediate availability of HBase
2.1.0.

Apache HBase™ is an open-source, distributed, versioned, non-relational
database.
Apache HBase gives you low latency random access to billions of rows with
millions of columns atop non-specialized hardware. To learn more about
HBase,
see https://hbase.apache.org/.

To download 2.1.0, visit our download page:

 http://hbase.apache.org/downloads.html

HBase 2.1.0 is the second minor release in the HBase 2.x line, which aims to
improve the stability and reliability of HBase. This release includes
roughly
240+ resolved issues since 2.0.0.

Notable new features include:
- Procedure v2 based replication peer modification. The advantage here is
that all the replication peer modification will be synchronous, which means
after the you come back from the call, you can make sure that all the
region servers have loaded the changes. Please see HBASE-19397 for more
details.
- Serial Replication. Now in replication we can make sure the order of
pushing logs is same as the order of requests from client. Please see
HBASE-20046 and HBASE-9465 for more details.

For other important changes:
- The minimum hadoop version has been changed to 2.7.1.
- We have successfully done a rolling upgrade from 1.4.3 to 2.1.0 which
shows that rolling upgrade from 1.x to 2.x is possible. Notice that this is
only an experimental feature, as there are likely uncovered corner cases in
our limited test. See
http://hbase.apache.org/book.html#upgrade2.0.rolling.upgrades for more
details.

For instructions on verifying ASF release downloads, please see

    https://www.apache.org/dyn/closer.cgi#verify

Project member signature keys can be found at

    https://www.apache.org/dist/hbase/KEYS

The list of 240+ changes made since 2.0.0 can be found here:

  https://apache.org/dist/hbase/2.1.0/CHANGES.md

The compatibility report vs 2.0.0:

 https://apache.org/dist/hbase/2.1.0/compatibility_report_2.0.0vs2.1.0.html

Question, comments, and problems are always welcome at: dev@hbase.apache.org
.

Thanks to all who contributed and made this release possible.

Cheers,
The HBase Dev Team