Choosing Where to Deploy the Cloudera Search Processes
You can collocate a Cloudera Search server (solr-server package) with a Hadoop TaskTracker (MRv1) and a DataNode. When collocating with TaskTrackers, be sure that the machine resources are not oversubscribed. Start with a small number of MapReduce slots and increase them gradually.
For instructions describing how and where to install solr-mapreduce, see Installing MapReduce Tools for use with Cloudera Search. For information about the Search package, see the Using Cloudera Search section in the Cloudera Search Tutorial.