|NO.Z.00053|——————————|BigDataEnd|——|Hadoop&MapReduce.V25|——|Hadoop.v25|Yarn资源调度|多租户|资源隔离配置|

一、[Yarn资源调度之多租户的资源隔离配置]

### --- Yarn多租户资源隔离配置

~~~     Yarn集群资源设置为A,B两个队列，
~~~     A队列设置占用资源70%主要用来运行常规的定时任务，
~~~     B队列设置占用资源30%主要运行临时任务，
~~~     两个队列间可相互资源共享，假如A队列资源占满，B队列资源比较充裕，
~~~     A队列可以使用B队列的资源，使总体做到资源利用最大化.
~~~     选择使用Fair Scheduler调度策略！！

二、具体配置

### --- yarn-site.xml

[root@linux121 ~]# vim /opt/yanqi/servers/hadoop-2.9.2/etc/hadoop/yarn-site.xml
<!-- 指定我们的任务调度使用fairScheduler的调度方式 -->
<property>
    <name>yarn.resourcemanager.scheduler.class</name>
    <value>org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler</value>
    <description>In case you do not want to use the defaultscheduler</description>
</property>
 
### --- 发送到其它节点
[root@linux121 ~]# rsync-script /opt/yanqi/servers/hadoop-2.9.2/etc/hadoop/yarn-site.xml

### --- 创建fair-scheduler.xml文件
~~~     在Hadoop安装目录/etc/hadoop创建该文件

~~~     # 创建fair-scheduler.xml文件
[root@linux121 ~]# vim /opt/yanqi/servers/hadoop-2.9.2/etc/hadoop/fair-scheduler.xml
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<allocations>
    <defaultQueueSchedulingPolicy>fair</defaultQueueSchedulingPolicy>
    <queue name="root" >
        <queue name="default">
            <aclAdministerApps>*</aclAdministerApps>
            <aclSubmitApps>*</aclSubmitApps>
            <maxResources>9216 mb,4 vcores</maxResources>
            <maxRunningApps>100</maxRunningApps>
            <minResources>1024 mb,1vcores</minResources>
            <minSharePreemptionTimeout>1000</minSharePreemptionTimeout>
            <schedulingPolicy>fair</schedulingPolicy>
            <weight>7</weight>
        </queue>
        <queue name="queue1">
            <aclAdministerApps>*</aclAdministerApps>
            <aclSubmitApps>*</aclSubmitApps>
            <maxResources>4096 mb,4vcores</maxResources>
            <maxRunningApps>5</maxRunningApps>
            <minResources>1024 mb, 1vcores</minResources>
            <minSharePreemptionTimeout>1000</minSharePreemptionTimeout>
            <schedulingPolicy>fair</schedulingPolicy>
            <weight>3</weight>
        </queue>
    </queue>
    <queuePlacementPolicy>
        <rule create="false" name="specified"/>
        <rule create="true" name="default"/>
    </queuePlacementPolicy>
</allocations>
 
### --- 发送到其它节点
[root@linux121 ~]# rsync-script /opt/yanqi/servers/hadoop-2.9.2/etc/hadoop/fair-scheduler.xml

### --- 重启yarn集群

[root@linux123 ~]# stop-yarn.sh
[root@linux123 ~]# start-yarn.sh

三、界面验证http://linux123:8088/cluster/scheduler：Scheduler

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Walter Savage Landor:strove with none,for none was worth my strife.Nature I loved and, next to Nature, Art:I warm'd both hands before the fire of life.It sinks, and I am ready to depart

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