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From Apache Wiki <wikidi...@apache.org>
Subject [Hadoop Wiki] Trivial Update of "Hbase/FAQ" by stack
Date Mon, 14 Apr 2008 20:38:43 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Hadoop Wiki" for change notification.

The following page has been changed by stack:
http://wiki.apache.org/hadoop/Hbase/FAQ

The comment on the change is:
Add faq 12

------------------------------------------------------------------------------
   1. [#9 How do I create a table with a column family named "count" (or some other HQL reserved
word)?]
   1. [#10 How do cell deletes work?]
   1. [#11 What ports does HBase use?]
+  1. [#12 Why is HBase ignoring HDFS client configuration such as dfs.replication?]
  
  == Answers ==
  
@@ -109, +110 @@

  
  '''11. [[Anchor(11)]] What ports does HBase use?'''
  
- Not counting the ports used by hadoop -- hdfs and mapreduce -- by default, hbase runs the
master and its informational http server at 60000 and 60010 respectively and regionservers
at 60020 and their informational http server at 60030.  ''${HBASE_HOME}/conf/hbase-default.xml''
lists the default values of all ports used.  Also check ''${HBASE_HOME}/conf/hbase-site.xml''
for site-specific overrides. 
+ Not counting the ports used by hadoop -- hdfs and mapreduce -- by default, hbase runs the
master and its informational http server at 60000 and 60010 respectively and regionservers
at 60020 and their informational http server at 60030.  ''${HBASE_HOME}/conf/hbase-default.xml''
lists the default values of all ports used.  Also check ''${HBASE_HOME}/conf/hbase-site.xml''
for site-specific overrides.
  
+ 
+ '''12. [[Anchor(11)]] Why is HBase ignoring HDFS client configuration such as dfs.replication?'''
+ 
+ If you have made HDFS client configuration on your hadoop cluster, HBase will not see this
configuration unless you do one of the following:
+ 
+  * Add a pointer to your ''HADOOP_CONF_DIR'' to ''CLASSPATH'' in ''hbase-env.sh''
+  * Add a copy of ''hadoop-site.xml'' to ''${HBASE_HOME}/conf'', or
+  * If only a small set of HDFS client configurations, add them to ''hbase-site.xml''
+ 
+ The first option is the better of the three since it avoids duplication.
+ 

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