Hello All --
We have a 20-node cluster running 0.17.1. Currently, the secondary
namenode process is running on the same machine as the primary
namenode. We would like to move it to a separate machine in the
cluster, as recommended. However, I cannot seem to find much in the
way of documentation on how to do this properly.
I found:
http://hadoop.apache.org/core/docs/current/hdfs_user_guide.html#Secondary+Namenode
It is usually run on a different machine than the primary Namenode
since its memory requirements are on the same order as the primary
namemode. The secondary namenode is started by bin/start-dfs.sh on the
nodes specified in conf/masters file.
as well as the "dfs.secondary.http.address" property in hadoop-
default.xml file.
However, this seems a bit confusing. What is it in conf/masters that
specifies that one hostname should be a master, and the other a
secondary?
Many thanks in advance for any guidance anyone can give.
Brian
