In general, you should not modify the settings in the warden files. However, if you modify the values in
Memory for the OS,
mfs Service, and Hadoop Services
The warden allocates memory to the operating system,
mfs service, and MapR Hadoop services based on the following parameters:
Note: Warden only allocates resources for MapR Hadoop services associated with roles that are installed on the node.
By default, Warden adds up the total memory consumed by all services and the OS and then gives 85% of what is left to the
mfs service. If you do not intend to use MapR-DB, you can set the
-noDB option in
configure.sh to specify that 20% of the memory available should be allocated to mfs service.
Memory for Jobs and Applications
Warden allocates memory to MapReduce v1 jobs and applications based on the services installed on the node and also the
mr1.memory.percent value in
warden.conf. For more information, see Resource Allocation for Jobs and Applications.