Public

This method walks a tree of CSQueue and clones the portion of the state relevant
for preemption in T

cloneQueues

This method selects and tracks containers to be preemptionCandidates. If a
container is in the targe

containerBasedPreemptOrKill

init

logToCSV

Compare by reversed priority order first, and then reversed containerId order

sortContainers

<init>

Given a set of queues compute the fix-point distribution of unassigned resources
among them. As pend

computeFixpointAllocation

This method computes (for a single level in the tree, passed as a List) the
ideal assignment of reso

computeIdealResourceDistribution

editSchedule

Based a resource preemption target drop reservations of containers and if
necessary select container

getContainersToPreempt

getMostUnderservedQueues

This method returns all non labeled resources.

getNonLabeledResources

getResourceCalculator

Checking if given container is a labeled container

isLabeledContainer

As more resources are needed for preemption, saved AMContainers has to be
rescanned. Such AMContaine

preemptAMContainers

Given a target preemption for a specific application, select containers to
preempt (after unreservin

preemptFrom

This method recursively computes the ideal assignment of resources to each level
of the hierarchy. T

recursivelyComputeIdealAssignment

Computes a normalizedGuaranteed capacity based on active queues

resetCapacity

setNodeLabels

addTempQueuePartition

ArrayList

Updating database using SQL prepared statement

This class is used to encode a string using the format required by
application/x-www-form-urlencoded

java.net.URLEncoder

An interface for an object which represents a database table entry, returned as
the result of the qu

java.sql.ResultSet

A concrete subclass of NumberFormat that formats decimal numbers. It has a
variety of features desig

java.text.DecimalFormat

This class consists exclusively of static methods that operate on or return
collections. It contains

java.util.Collections

javax.swing.JOptionPane

This is the central class in the log4j package. Most logging operations, except
configuration, are d

org.apache.log4j.Logger

getResourceAsStream

setRequestProperty

runOnUiThread

/**
   * This method computes (for a single level in the tree, passed as a {@code
   * List<TempQueue>}) the ideal assignment of resources. This is done
   * recursively to allocate capacity fairly across all queues with pending
   * demands. It terminates when no resources are left to assign, or when all
   * demand is satisfied.
   *
   * @param rc resource calculator
   * @param queues a list of cloned queues to be assigned capacity to (this is
   * an out param)
   * @param totalPreemptionAllowed total amount of preemption we allow
   * @param tot_guarant the amount of capacity assigned to this pool of queues
   */

// qAlloc tracks currently active queues (will decrease progressively as

// unassigned tracks how much resources are still to assign, initialized

// with the total capacity for this set of queues

// group queues based on whether they have non-zero guaranteed capacity

// first compute the allocation as a fixpoint based on guaranteed capacity

// if any capacity is left unassigned, distributed among zero-guarantee 

// queues uniformly (i.e., not based on guaranteed capacity, as this is zero)

// based on ideal assignment computed above and current assignment we derive

// how much preemption is required overall

// if we need to preempt more than is allowed, compute a factor (0<f<1)

// that is used to scale down how much we ask back from each queue

// assign to each queue the amount of actual preemption based on local

// information of ideal preemption and scaling factor

How to use computeFixpointAllocationmethodin org.apache.hadoop.yarn.server.resourcemanager.monitor.capacity.ProportionalCapacityPreemptionPolicy

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How to use
computeFixpointAllocation
method
in
org.apache.hadoop.yarn.server.resourcemanager.monitor.capacity.ProportionalCapacityPreemptionPolicy