accumulo-commits mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
Subject svn commit: r905501 - in /websites/staging/accumulo/trunk/content: ./ release_notes/1.6.0.html
Date Tue, 08 Apr 2014 21:49:17 GMT
Author: buildbot
Date: Tue Apr  8 21:49:17 2014
New Revision: 905501

Staging update by buildbot for accumulo

    websites/staging/accumulo/trunk/content/   (props changed)

Propchange: websites/staging/accumulo/trunk/content/
--- cms:source-revision (original)
+++ cms:source-revision Tue Apr  8 21:49:17 2014
@@ -1 +1 @@

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  8 21:49:17 2014
@@ -94,6 +94,7 @@
     <p><strong>DRAFT 1.6.0 RELEASE NOTES</strong></p>
 <p>Apache Accumulo 1.6.0</p>
 <p>This document is a work in progress.</p>
+<p>TODO recommend hadoop 2</p>
 <h2 id="notable-improvements">Notable Improvements</h2>
 <h3 id="multiple-namenode-support">Multiple namenode support</h3>
 <p><a href="">BigTable's</a>
design allows for its internal metadata to automatically spread across multiple nodes.  Accumulo
has followed this design and scales very well as a result.  There is one impediment to scaling
though, and this is the HDFS namenode.  There are two problems with the namenode when it comes
to scaling.  First, the namenode stores all of its filesystem metadata in memory on a single
machine.  This introduces an upper bound on the number of files Accumulo can have.  Second,
there is an upper bound on the number of file operations per second that a single namenode
can support.  For example, a namenode can only support a few thousand delete or create file
request per second.  </p>
@@ -130,6 +131,7 @@
 <h3 id="service-ip-addresses">Service IP addresses</h3>
 <p>Previous versions of Accumulo always used IP addresses internally.  This could be
problematic in virtual machine environments where IP addresses change.  In <a href=""
title="Use FQDN/verbatim data from config files">ACCUMULO-1585</a> this was changed,
now the accumulo uses the exact hostnames from its config files for internal addressing. 
 <p>All Accumulo processes running on a cluster are locatable via zookeeper.  Therefore
using well known ports is not really required.  <a href=""
title="Make all processes able to use random ports">ACCUMULO-1664</a> makes it possible
to for all Accumulo processes to use random ports.  This makes it easier to run multiple Accumulo
instances on a single node.   </p>
+<p>While Hadoop <a href="">does not support
IPv6 networks</a>, attempting to run on a system that does not have IPv6 completely
disabled can cause strange failures. <a href=""
title="Include in process startup">ACCUMULO-2262</a>
invokes the JVM-provided configuration parameter at process startup to prefer IPv4 over IPv6.</p>
 <h3 id="viewfs">ViewFS</h3>
 <p>Multiple bug-fixes were made to support running Accumulo over multiple HDFS instances
using ViewFS. <a href="" title="Failures
using viewfs with multiple namenodes">ACCUMULO-2047</a> is the parent
 ticket that contains numerous fixes to enable this support.</p>
@@ -139,7 +141,10 @@ ticket that contains numerous fixes to e
 <li><a href="" title="Root tablet
in its own table">ACCUMULO-1481</a> The root tablet is now the root table.</li>
 <li><a href="" title="Add ability
for client to start Scanner readahead immediately">ACCUMULO-1566</a> When read-ahead
starts in the scanner is now configurable.</li>
 <li><a href="" title="Allow On/Offline
Command To Execute Synchronously">ACCUMULO-1667</a> Added a synchronous version of
online and offline table</li>
+<li><a href="" title="MultiTableBatchWriterImpl.getBatchWriter()
is not performant for multiple threads">ACCUMULO-1833</a> Multitable batch writer
is faster now when used by multiple threads</li>
+<li><a href="" title="Make unit
on memory parameters case-insensitive">ACCUMULO-1933</a> Lower case can be given
for memory units now.</li>
 <li><a href="" title="Provide
resource cleanup via static utility rather than Instance.close">ACCUMULO-2128</a>
Provide resource cleanup via static utility</li>
+<li><a href="" title="Need a
way to configure TNonblockingServer.maxReadBufferBytes to prevent OOMs">ACCUMULO-2360</a>
Allow configuration of the maximum thrift message size a server will read.</li>
 <h2 id="notable-bug-fixes">Notable Bug Fixes</h2>
 <p>TODO kturner looked at bugs w/ fix version of 1.6.0 and a non-empty affects version
and selected ones he thought were relevant to users.... need others devs to do this
@@ -155,8 +160,8 @@ TODO some bugs may be unintelligible to 
 <li><a href="" title="AccumuloInputFormat
cannot fetch empty column family">ACCUMULO-1661</a> AccumuloInputFormat cannot fetch
empty column family</li>
 <li><a href="" title="Deep copy
in the compaction scope iterators can throw off the stats">ACCUMULO-1696</a> Deep
copy in the compaction scope iterators can throw off the stats</li>
 <li><a href="" title="stop-here
doesn't consider system hostname">ACCUMULO-1698</a> stop-here doesn't consider system
-<li><a href="" title="MultiTableBatchWriterImpl.getBatchWriter()
is not performant for multiple threads">ACCUMULO-1833</a> MultiTableBatchWriterImpl.getBatchWriter()
is not performant for multiple threads</li>
 <li><a href="" title="
starts only one GC process even if more are defined">ACCUMULO-1901</a>
starts only one GC process even if more are defined</li>
+<li><a href="" title="monitor
not seeing zookeeper updates">ACCUMULO-1920</a> Monitor was not seeing zookeeper
updates for tables</li>
 <li><a href="" title="NPE in
tablet assignment">ACCUMULO-1921</a> NPE in tablet assignment</li>
 <li><a href="" title="Proxy does
not handle Key timestamps correctly">ACCUMULO-1994</a> Proxy does not handle Key
timestamps correctly</li>
 <li><a href="" title="VFS Classloader
has potential to collide localized resources">ACCUMULO-2174</a> VFS Classloader has
potential to collide localized resources</li>

View raw message