Author: stack
Date: Mon Oct 5 22:47:51 2009
New Revision: 822070
URL: http://svn.apache.org/viewvc?rev=822070&view=rev
Log:
HBASE-1506 [performance] Make splits faster
Modified:
hadoop/hbase/branches/0.20/CHANGES.txt
hadoop/hbase/branches/0.20/src/java/overview.html
Modified: hadoop/hbase/branches/0.20/CHANGES.txt
URL:
http://svn.apache.org/viewvc/hadoop/hbase/branches/0.20/CHANGES.txt?rev=822070&r1=822069&r2=822070&view=diff
==============================================================================
--- hadoop/hbase/branches/0.20/CHANGES.txt (original)
+++ hadoop/hbase/branches/0.20/CHANGES.txt Mon Oct 5 22:47:51 2009
@@ -68,6 +68,7 @@
HBASE-1875 Compression test utility (elsif via Stack)
HBASE-1832 Faster enable/disable/delete
HBASE-1481 Add fast row key only scanning
+ HBASE-1506 [performance] Make splits faster
Release 0.20.0 - Tue Sep 8 12:48:41 PDT 2009
Modified: hadoop/hbase/branches/0.20/src/java/overview.html
URL:
http://svn.apache.org/viewvc/hadoop/hbase/branches/0.20/src/java/overview.html?rev=822070&r1=822069&r2=822070&view=diff
==============================================================================
--- hadoop/hbase/branches/0.20/src/java/overview.html (original)
+++ hadoop/hbase/branches/0.20/src/java/overview.html Mon Oct 5 22:47:51 2009
@@ -69,12 +69,18 @@
in your hbase-site.xml.</li>
<li>This is a list of patches we recommend you apply to your running
Hadoop cluster:
<ul>
- <li><a
hef="https://issues.apache.org/jira/browse/HADOOP-4681";>HADOOP-4681
<i>"DFSClient block read failures cause open DFSInputStream to become
unusable"</i></a>. This patch will help with the ever-popular, "No live nodes
contain current block".
+ <li><a
hef="https://issues.apache.org/jira/browse/HADOOP-4681";>HADOOP-4681/HDFS-127
<i>"DFSClient block read failures cause open DFSInputStream to become
unusable"</i></a>. This patch will help with the ever-popular, "No live nodes
contain current block".
The hadoop version bundled with hbase has this patch applied. Its an
HDFS client
fix so this should do for usual usage but if your cluster is missing the
patch,
and in particular if calling hbase from a mapreduce job, you may run
into this
issue.
</li>
+ <li><a hef="https://issues.apache.org/jira/browse/HDFS-630";>HDFS-630 <i>
"In DFSOutputStream.nextBlockOutputStream(), the client can exclude specific
datanodes when locating the next block"</i></a>. Dead datanodes take ten
minutes to timeout at namenode.
+ Meantime the namenode can still send DFSClients to the dead datanode as
host for
+ a replicated block. DFSClient can get stuck on trying to get block from
a
+ dead node. This patch allows DFSClients pass namenode lists of known
+ dead datanodes.
+</li>
</ul>
</li>
</ul>
