Package org.apache.druid.server.scheduling

Class HiLoQueryLaningStrategy

java.lang.Object

org.apache.druid.server.scheduling.HiLoQueryLaningStrategy

All Implemented Interfaces:

QueryLaningStrategy

public class HiLoQueryLaningStrategy
extends Object
implements QueryLaningStrategy

Query laning strategy which associates all Query with priority lower than 0 into a 'low' lane

Field Summary

Fields

Modifier and Type	Field	Description
static final String	LOW

Constructor Summary

Constructors

Constructor	Description
HiLoQueryLaningStrategy(Integer maxLowPercent)

Method Summary

Modifier and Type	Method	Description
<T> Optional<String>	computeLane(QueryPlus<T> query, Set<SegmentServerSelector> segments)	For a given QueryPlus and set of SegmentServerSelector, compute if a query belongs to a lane This method must be thread safe
it.unimi.dsi.fastutil.objects.Object2IntMap<String>	getLaneLimits(int totalLimit)	Provide a map of lane names to the limit on the number of concurrent queries for that lane

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.druid.server.QueryLaningStrategy

computeLimitFromPercent

Field Details

LOW

public static final String LOW

See Also:

• Constant Field Values

Constructor Details

HiLoQueryLaningStrategy

public HiLoQueryLaningStrategy(Integer maxLowPercent)

Method Details

getLaneLimits

public it.unimi.dsi.fastutil.objects.Object2IntMap<String> getLaneLimits(int totalLimit)

Description copied from interface: QueryLaningStrategy

Provide a map of lane names to the limit on the number of concurrent queries for that lane

Specified by:

getLaneLimits in interface QueryLaningStrategy

computeLane

public <T> Optional<String> computeLane(QueryPlus<T> query,
 Set<SegmentServerSelector> segments)

Description copied from interface: QueryLaningStrategy

For a given QueryPlus and set of SegmentServerSelector, compute if a query belongs to a lane This method must be thread safe

Specified by:

computeLane in interface QueryLaningStrategy