org.apache.hadoop.hbase.master

类 MasterAnnotationReadingPriorityFunction

java.lang.Object

org.apache.hadoop.hbase.regionserver.AnnotationReadingPriorityFunction

org.apache.hadoop.hbase.master.MasterAnnotationReadingPriorityFunction

所有已实现的接口:

PriorityFunction

@InterfaceAudience.Private
public class MasterAnnotationReadingPriorityFunction
extends AnnotationReadingPriorityFunction

Priority function specifically for the master. This doesn't make the super users always priority since that would make everything to the master into high priority. Specifically when reporting that a region is in transition master will try and edit the meta table. That edit will block the thread until successful. However if at the same time meta is also moving then we need to ensure that the regular region that's moving isn't blocking processing of the request to online meta. To accomplish this this priority function makes sure that all requests to transition meta are handled in different threads from other report region in transition calls. After HBASE-21754, ReportRegionStateTransitionRequest for meta region will be assigned a META_QOS , a separate executor called metaTransitionExecutor will execute it. Other transition request will be executed in priorityExecutor to prevent being mixed with normal requests

字段概要

字段

限定符和类型	字段和说明
static int	META_TRANSITION_QOS

从类继承的字段 org.apache.hadoop.hbase.regionserver.AnnotationReadingPriorityFunction

annotatedQos, SCAN_VTIME_WEIGHT_CONF_KEY

构造器概要

构造器

构造器和说明
MasterAnnotationReadingPriorityFunction(RSRpcServices rpcServices)
MasterAnnotationReadingPriorityFunction(RSRpcServices rpcServices, Class<? extends RSRpcServices> clz)

方法概要

限定符和类型	方法和说明
int	getPriority(org.apache.hadoop.hbase.shaded.protobuf.generated.RPCProtos.RequestHeader header, org.apache.hbase.thirdparty.com.google.protobuf.Message param, User user) Returns a 'priority' based on the request type.

从类继承的方法 org.apache.hadoop.hbase.regionserver.AnnotationReadingPriorityFunction

getAnnotatedPriority, getBasePriority, getDeadline

从类继承的方法 java.lang.Object

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

字段详细资料

META_TRANSITION_QOS

public static final int META_TRANSITION_QOS

另请参阅:

常量字段值

构造器详细资料

MasterAnnotationReadingPriorityFunction

public MasterAnnotationReadingPriorityFunction(RSRpcServices rpcServices)

MasterAnnotationReadingPriorityFunction

public MasterAnnotationReadingPriorityFunction(RSRpcServices rpcServices,
                                               Class<? extends RSRpcServices> clz)

方法详细资料

getPriority

public int getPriority(org.apache.hadoop.hbase.shaded.protobuf.generated.RPCProtos.RequestHeader header,
                       org.apache.hbase.thirdparty.com.google.protobuf.Message param,
                       User user)

从类复制的说明: AnnotationReadingPriorityFunction

Returns a 'priority' based on the request type. Currently the returned priority is used for queue selection. See the SimpleRpcScheduler as example. It maintains a queue per 'priory type' HIGH_QOS (meta requests), REPLICATION_QOS (replication requests), NORMAL_QOS (user requests).

指定者:

getPriority 在接口中 PriorityFunction

覆盖:

getPriority 在类中 AnnotationReadingPriorityFunction

返回:

Priority of this request.