Sorry all, I maybe get the answer because I didn't read doc carefully. clustera is for n1, n2 clusterb is for n3,n4
so the following configuration would be answer my question, does that okay? <property> <name>dfs.nameservices</name> <value>clustera, clusterb</value> </property> <property> <name>dfs.namenode.shared.edits.dir</name> <value>qjournal://node1.example.com:8485;node2.example.com:8485;node3.example.com:8485/clustera</value> </property> <property> <name>dfs.namenode.shared.edits.dir</name> <value>qjournal://node1.example.com:8485;node2.example.com:8485;node3.example.com:8485/clusterb</value> </property> On Sat, Feb 16, 2013 at 12:56 PM, Azuryy Yu <[email protected]> wrote: > Hi, > > If I have four name nodes in my cluster: n1, n2, n3, n4, then > n2 is n1's standby, n4 is n3's standby. > > there is no dependency between n1 and n3, which is HDFS federation. > > Anybody can kindly give me an example for HA and federation configuration? > especially HDFS HA, how to configure two JN groups (* > dfs.namenode.shared.edits.dir*) for n1/n2 and n3/n4, Thanks. > > >
