Quorum services like journal node (and zookeeper) need to have at least 3 instances running
On Thu, Oct 9, 2014 at 4:19 AM, oc tsdb <oc.t...@gmail.com> wrote: > Hi, > > We have cluster with 3 nodes (1 namenode + 2 datanodes). > Cluster is running with hadoop 2.4.0 version. > > We would like to add High Availability(HA) to Namenode using the Quorum > Journal Manager. > > As per the below link, we need two NN machines with same configuration. > > > http://hadoop.apache.org/docs/r2.4.0/hadoop-project-dist/hadoop-hdfs/HDFSHighAvailabilityWithQJM.html#Hardware > resources > > Our query is: > > As we have existing cluster with 3 nodes (1 namenode + 2 datanodes), can > we configure standby namenode on one of the datanodes? Will there be any > issues if we run standby namenode and datanode together? > Or we should add one more machine and configure it as standby namenode? > > Regarding Journal node, Can we run it on any machine (datanode and > namenode)? > > Thanks in advance. > > Thanks > oc.tsdb > > > >
