Author: buildbot
Date: Tue Apr 29 21:38:26 2014
New Revision: 907380
Log:
Staging update by buildbot for accumulo
Modified:
websites/staging/accumulo/trunk/content/ (props changed)
websites/staging/accumulo/trunk/content/release_notes/1.6.0.html
Propchange: websites/staging/accumulo/trunk/content/
------------------------------------------------------------------------------
--- cms:source-revision (original)
+++ cms:source-revision Tue Apr 29 21:38:26 2014
@@ -1 +1 @@
-1591052
+1591115
Modified: websites/staging/accumulo/trunk/content/release_notes/1.6.0.html
==============================================================================
--- websites/staging/accumulo/trunk/content/release_notes/1.6.0.html (original)
+++ websites/staging/accumulo/trunk/content/release_notes/1.6.0.html Tue Apr 29
21:38:26 2014
@@ -109,7 +109,8 @@
</ol>
<p>The only built in test that conditional mutations support are equality and
isNull. However, iterators can be configured on a conditional mutation to run
before these test. This makes it possible to implement any number of test such
as less than, greater than, contains, etc.</p>
<h3 id="encryption">Encryption</h3>
-<p>Support for encrypting Accumulo's persistent and over the wire data was
added. <a href="https://issues.apache.org/jira/browse/ACCUMULO-998";
title="Support encryption at rest">ACCUMULO-998</a>, <a
href="https://issues.apache.org/jira/browse/ACCUMULO-958"; title="Support
pluggable encryption in walogs">ACCUMULO-958</a>, and <a
href="https://issues.apache.org/jira/browse/ACCUMULO-980"; title="Support
pluggable codecs for RFile">ACCUMULO-980</a> cover encrypting data at rest in
write ahead logs and rfiles. <a
href="https://issues.apache.org/jira/browse/ACCUMULO-1009"; title="Support
encryption over the wire">ACCUMULO-1009</a> covers encrypting data over the
wire using SSL. </p>
+<p>Encryption is still an experimental feature, but much progress has been
made since 1.5.0. Support for encrypting rfiles and write ahead logs were
added in <a href="https://issues.apache.org/jira/browse/ACCUMULO-958";
title="Support pluggable encryption in walogs">ACCUMULO-958</a> and <a
href="https://issues.apache.org/jira/browse/ACCUMULO-980"; title="Support
pluggable codecs for RFile">ACCUMULO-980</a>. Support for encrypting data over
the wire using SSL was added in <a
href="https://issues.apache.org/jira/browse/ACCUMULO-1009"; title="Support
encryption over the wire">ACCUMULO-1009</a>.</p>
+<p>When a tablet server fails, its write ahead logs are sorted and stored in
HDFS. In 1.6.0, encrypting these sorted write ahead logs is not supported. <a
href="https://issues.apache.org/jira/browse/ACCUMULO-981"; title="support
pluggable encryption when recovering write-ahead logs">ACCUMULO-981</a>
addresses this issue. </p>
<h3 id="pluggable-compaction-strategies">Pluggable compaction strategies</h3>
<p>One of the key elements of the <a
href="http://research.google.com/archive/bigtable.html";>BigTable</a> design is
use of the <a
href="http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.44.2782&rep=rep1&type=pdf";>Log
Structured Merge Tree</a>. This entails sorting data in memory, writing out
sorted files, and then later merging multiple sorted files into a single file.
These automatic merges happen in the background and Accumulo decides when to
merge files based comparing relative sizes of files to a compaction ratio.
Adjusting the compaction ratio is the only way a user can control this process.
<a href="https://issues.apache.org/jira/browse/ACCUMULO-1451"; title="Make
Compaction triggers extensible">ACCUMULO-1451</a> introduces pluggable
compaction strategies which allow users to choose when and what files to
compact. <a href="https://issues.apache.org/jira/browse/ACCUMULO-1808";
title="Create compaction strategy that has size limit">ACCUMULO-1808</a> adds a
com
paction strategy the prevents compaction of files over a configurable size.</p>
<h3 id="lexicoders">Lexicoders</h3>
@@ -202,6 +203,7 @@ for <code>org.apache.accumulo.tserver.Ho
If this is happening often a possible work around is to set
<code>general.rpc.timeout</code> to <code>240s</code>. </p>
<h3 id="other-known-issues">Other known issues</h3>
<ul>
+<li><a href="https://issues.apache.org/jira/browse/ACCUMULO-981";
title="support pluggable encryption when recovering write-ahead
logs">ACCUMULO-981</a> Sorted write ahead logs are not encrypted.</li>
<li><a href="https://issues.apache.org/jira/browse/ACCUMULO-1507";
title="Dynamic Classloader still can't keep proper track of
jars">ACCUMULO-1507</a> Dynamic Classloader still can't keep proper track of
jars</li>
<li><a href="https://issues.apache.org/jira/browse/ACCUMULO-1588";
title="Monitor XML and JSON differ">ACCUMULO-1588</a> Monitor XML and JSON
differ</li>
<li><a href="https://issues.apache.org/jira/browse/ACCUMULO-1628"; title="NPE
on deep copied dumped memory iterator">ACCUMULO-1628</a> NPE on deep copied
dumped memory iterator</li>
