Specifying Fair Scheduler Configuration Properties in yarn-site.xml
The yarn-site.xml file contains parameters that determine scheduler-wide
options. These properties include:
| Parameter | Default Value | Description |
|---|---|---|
yarn.scheduler.fair.allocation.file
|
fair-scheduler.xml
|
Specifies the path to the allocation file. If a relative path is given, the file is searched for on the classpath. |
yarn.scheduler.fair.user-as-default-queue
|
true | Indicates whether to use the username associated with the allocation file as the default queue name, if a queue name is not specified. Note: If a queue placement policy is given in the allocations file, this property is ignored. |
yarn.scheduler.fair.preemption
|
false | Indicates whether to use preemption. NOTE: Do not use preemption when
FairScheduler DominantResourceFairness is in use and node labels are
present. |
yarn.scheduler.fair.sizebasedweight
|
false | Indicates whether to assign shares to individual applications based on their size, rather than providing an equal share to all applications regardless of size. When set to true, applications are weighted by (ln 1 + <application's total requested memory>)/ ln 2. |
yarn.scheduler.fair.assignmultiple
|
false | Indicates whether to allow multiple container assignments in one heartbeat. |