org.apache.drill.exec.work.foreman.rm

Class DefaultResourceManager

java.lang.Object

org.apache.drill.exec.work.foreman.rm.DefaultResourceManager

All Implemented Interfaces:

ResourceManager

public class DefaultResourceManager
extends Object
implements ResourceManager

Represents a default resource manager for clusters that do not provide query queues. Without queues to provide a hard limit on the query admission rate, the number of active queries must be estimated and the resulting resource allocations will be rough estimates.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DefaultResourceManager.DefaultQueryResourceManager
static class	DefaultResourceManager.DefaultResourceAllocator

Field Summary

Fields

Modifier and Type	Field and Description
int	cpusPerNode
long	memoryPerNode

Constructor Summary

Constructors

Constructor and Description
DefaultResourceManager()

Method Summary

Methods

Modifier and Type	Method and Description
void	close()
int	cpusPerNode()
long	memoryPerNode() Returns the memory, in bytes, assigned to each node in a Drill cluster.
QueryResourceManager	newQueryRM(Foreman foreman) Create a resource manager to execute a query.
QueryResourceAllocator	newResourceAllocator(QueryContext queryContext) Create a resource manager to prepare or describe a query.

Methods inherited from class java.lang.Object

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

Field Detail

memoryPerNode

public final long memoryPerNode

cpusPerNode

public final int cpusPerNode

Constructor Detail

DefaultResourceManager

public DefaultResourceManager()

Method Detail

memoryPerNode

public long memoryPerNode()

Description copied from interface: ResourceManager

Returns the memory, in bytes, assigned to each node in a Drill cluster. Drill requires that nodes are symmetrical. So, knowing the memory on any one node also gives the memory on all other nodes.

Specified by:

memoryPerNode in interface ResourceManager

Returns:

the memory, in bytes, available in each Drillbit

cpusPerNode

public int cpusPerNode()

Specified by:

cpusPerNode in interface ResourceManager

newResourceAllocator

public QueryResourceAllocator newResourceAllocator(QueryContext queryContext)

Description copied from interface: ResourceManager

Create a resource manager to prepare or describe a query. In this form, no queuing is done, but the plan is created as if queuing had been done. Used when executing EXPLAIN PLAN.

Specified by:

newResourceAllocator in interface ResourceManager

Returns:

a resource manager for the query

newQueryRM

public QueryResourceManager newQueryRM(Foreman foreman)

Description copied from interface: ResourceManager

Create a resource manager to execute a query.

Specified by:

newQueryRM in interface ResourceManager

Parameters:

foreman - Foreman which manages the execution

Returns:

a resource manager for the query

close

public void close()

Specified by:

close in interface ResourceManager