mapred.capacity-scheduler.queue.default.guaranteed-capacity 100 Percentage of the number of slots in the cluster that are guaranteed to be available for jobs in this queue. mapred.capacity-scheduler.queue.default.reclaim-time-limit 300 The amount of time, in seconds, before which resources distributed to other queues will be reclaimed. mapred.capacity-scheduler.queue.default.supports-priority false If true, priorities of jobs will be taken into account in scheduling decisions. mapred.capacity-scheduler.queue.default.minimum-user-limit-percent 100 Each queue enforces a limit on the percentage of resources allocated to a user at any given time, if there is competition for them. This user limit can vary between a minimum and maximum value. The former depends on the number of users who have submitted jobs, and the latter is set to this property value. For example, suppose the value of this property is 25. If two users have submitted jobs to a queue, no single user can use more than 50% of the queue resources. If a third user submits a job, no single user can use more than 33% of the queue resources. With 4 or more users, no user can use more than 25% of the queue's resources. A value of 100 implies no user limits are imposed. mapred.capacity-scheduler.queue.default.maximum-initialized-jobs-per-user 2 The maximum number of jobs to be pre-initialized for a user of the job queue. mapred.capacity-scheduler.reclaimCapacity.interval 5 The time interval, in seconds, between which the scheduler periodically determines whether capacity needs to be reclaimed for any queue. mapred.capacity-scheduler.default-reclaim-time-limit 300 The amount of time, in seconds, before which resources distributed to other queues will be reclaimed by default in a job queue. mapred.capacity-scheduler.default-supports-priority false If true, priorities of jobs will be taken into account in scheduling decisions by default in a job queue. mapred.capacity-scheduler.task.default-pmem-percentage-in-vmem -1 If mapred.task.maxpmem is set to -1, this configuration will be used to calculate job's physical memory requirements as a percentage of the job's virtual memory requirements set via mapred.task.maxvmem. This property thus provides default value of physical memory for job's that don't explicitly specify physical memory requirements. If not explicitly set to a valid value, scheduler will not consider physical memory for scheduling even if virtual memory based scheduling is enabled(by setting valid values for both mapred.task.default.maxvmem and mapred.task.limit.maxvmem). mapred.capacity-scheduler.task.limit.maxpmem -1 Configuration that provides an upper limit on the maximum physical memory that can be specified by a job. The job configuration mapred.task.maxpmem should be less than this value. If not, the job will be rejected by the scheduler. If it is set to -1, scheduler will not consider physical memory for scheduling even if virtual memory based scheduling is enabled(by setting valid values for both mapred.task.default.maxvmem and mapred.task.limit.maxvmem). mapred.capacity-scheduler.default-minimum-user-limit-percent 100 The percentage of the resources limited to a particular user for the job queue at any given point of time by default. mapred.capacity-scheduler.default-maximum-initialized-jobs-per-user 2 The maximum number of jobs to be pre-initialized for a user of the job queue. mapred.capacity-scheduler.init-poll-interval 5000 The amount of time in miliseconds which is used to poll the job queues for jobs to initialize. mapred.capacity-scheduler.init-worker-threads 5 Number of worker threads which would be used by Initialization poller to initialize jobs in a set of queue. If number mentioned in property is equal to number of job queues then a single thread would initialize jobs in a queue. If lesser then a thread would get a set of queues assigned. If the number is greater then number of threads would be equal to number of job queues.