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Subject: Many Standby NameNodes for QJM HA
From: lei liu <liulei412@gmail.com>
To: user@hadoop.apache.org
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--20cf3071c8863525c904e2deab25
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I use hadoop-2.0.5 version, and I use QJM for HA.

I want to there are two Standby NameNodes and one Active NameNode in  HDFS
cluster,

I think I need to config below content:
<property>
  <name>dfs.ha.namenodes.mycluster</name>
  <value>nn1,nn2,nn3</value>
</property>
<property>
  <name>dfs.namenode.rpc-address.mycluster.nn1</name>
  <value>10.232.98.77:20020</value>
</property>
<property>
  <name>dfs.namenode.rpc-address.mycluster.nn2</name>
  <value>10.232.98.78:20020</value>
</property>
<property>
  <name>dfs.namenode.rpc-address.mycluster.nn3</name>
  <value>10.232.98.79:20020</value>
</property>
<property>
  <name>dfs.client.failover.proxy.provider.mycluster</name>

<value>org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider</value>
</property>

Can I do that?

Thanks,

LiuLei

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<div dir=3D"ltr"><div><div>I use hadoop-2.0.5 version, and I use QJM for HA=
.<br><br></div>I want to there are two Standby NameNodes and one Active Nam=
eNode in=A0 HDFS cluster,<br><br></div><div>I think I need to config below =
content:<br>
&lt;property&gt;<br>=A0 &lt;name&gt;dfs.ha.namenodes.mycluster&lt;/name&gt;=
<br>=A0 &lt;value&gt;nn1,nn2,nn3&lt;/value&gt;<br>&lt;/property&gt;<br>&lt;=
property&gt;<br>=A0 &lt;name&gt;dfs.namenode.rpc-address.mycluster.nn1&lt;/=
name&gt;<br>
=A0 &lt;value&gt;<a href=3D"http://10.232.98.77:20020">10.232.98.77:20020</=
a>&lt;/value&gt;<br>&lt;/property&gt;<br>&lt;property&gt;<br>=A0 &lt;name&g=
t;dfs.namenode.rpc-address.mycluster.nn2&lt;/name&gt;<br>=A0 &lt;value&gt;<=
a href=3D"http://10.232.98.78:20020">10.232.98.78:20020</a>&lt;/value&gt;<b=
r>
&lt;/property&gt; <br>&lt;property&gt;<br>=A0 &lt;name&gt;dfs.namenode.rpc-=
address.mycluster.nn3&lt;/name&gt;<br>=A0 &lt;value&gt;<a href=3D"http://10=
.232.98.79:20020">10.232.98.79:20020</a>&lt;/value&gt;<br>&lt;/property&gt;=
 <br>
&lt;property&gt;<br>=A0 &lt;name&gt;dfs.client.failover.proxy.provider.mycl=
uster&lt;/name&gt;<br>=A0 &lt;value&gt;org.apache.hadoop.hdfs.server.nameno=
de.ha.ConfiguredFailoverProxyProvider&lt;/value&gt;<br>&lt;/property&gt;<br=
>
<br></div><div>Can I do that?<br><br></div><div>Thanks,<br><br></div><div>L=
iuLei<br></div></div>

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