Package org.apache.drill.yarn.core

Class ContainerRequestSpec

java.lang.Object

org.apache.drill.yarn.core.ContainerRequestSpec

public class ContainerRequestSpec
extends Object

Describes a container request in terms of priority, memory, cores and placement preference. This is a simplified version of the YARN ContainerRequest structure. This structure is easier to use within the app, then is translated to the YARN structure when needed.

Field Summary

Fields

Modifier and Type	Field	Description
double	disks	Number of virtual disks (channels, spindles) to request.
List<String>	hosts
int	memoryMb	Memory, in MB, required by the container.
String	nodeLabelExpr	Node label expression to apply to this request.
int	priority	Application-specific priority.
List<String>	racks
int	vCores	Number of "virtual cores" required by the task.

Constructor Summary

Constructors

Constructor	Description
ContainerRequestSpec()

Method Summary

Modifier and Type	Method	Description
org.apache.hadoop.yarn.client.api.AMRMClient.ContainerRequest	makeRequest()	Create a YARN ContainerRequest object from the information in this object.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

priority

public int priority

Application-specific priority. Drill-on-Yarn uses the priority to associate YARN requests with a Scheduler. When the resource allocation arrives, we use the priority to trace back to the scheduler that requested it, and from there to the task to be run in the allocation.

For this reason, the priority is set by the Drill-on-YARN application; it is not a user-adjustable value.

memoryMb

public int memoryMb

Memory, in MB, required by the container.

vCores

public int vCores

Number of "virtual cores" required by the task. YARN allocates whole CPU cores and does not support fractional allocations.

disks

public double disks

Number of virtual disks (channels, spindles) to request. Not supported in Apache YARN, is supported in selected distributions.

nodeLabelExpr

public String nodeLabelExpr

Node label expression to apply to this request.

racks

public List<String> racks

hosts

public List<String> hosts

Constructor Details

ContainerRequestSpec

public ContainerRequestSpec()

Method Details

makeRequest

public org.apache.hadoop.yarn.client.api.AMRMClient.ContainerRequest makeRequest()

Create a YARN ContainerRequest object from the information in this object.

Returns: