YARN-1452. Added documentation about the configuration and usage of generic application history and the timeline data service. Contributed by Zhijie Shen.
svn merge --ignore-ancestry -c 1581656 ../../trunk/ git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1581657 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Vinod Kumar Vavilapalli
parent
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commit
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@ -96,10 +96,11 @@
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<menu name="YARN" inherit="top">
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<item name="YARN Architecture" href="hadoop-yarn/hadoop-yarn-site/YARN.html"/>
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<item name="Writing YARN Applications" href="hadoop-yarn/hadoop-yarn-site/WritingYarnApplications.html"/>
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<item name="Capacity Scheduler" href="hadoop-yarn/hadoop-yarn-site/CapacityScheduler.html"/>
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<item name="Fair Scheduler" href="hadoop-yarn/hadoop-yarn-site/FairScheduler.html"/>
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<item name="Web Application Proxy" href="hadoop-yarn/hadoop-yarn-site/WebApplicationProxy.html"/>
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<item name="YARN Timeline Server" href="hadoop-yarn/hadoop-yarn-site/TimelineServer.html"/>
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<item name="Writing YARN Applications" href="hadoop-yarn/hadoop-yarn-site/WritingYarnApplications.html"/>
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<item name="YARN Commands" href="hadoop-yarn/hadoop-yarn-site/YarnCommands.html"/>
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<item name="Scheduler Load Simulator" href="hadoop-sls/SchedulerLoadSimulator.html"/>
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</menu>
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@ -311,6 +311,9 @@ Release 2.4.0 - UNRELEASED
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YARN-1850. Introduced the ability to optionally disable sending out timeline-
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events in the TimelineClient. (Zhijie Shen via vinodkv)
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YARN-1452. Added documentation about the configuration and usage of generic
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application history and the timeline data service. (Zhijie Shen via vinodkv)
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OPTIMIZATIONS
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YARN-1771. Reduce the number of NameNode operations during localization of
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@ -1105,7 +1105,7 @@
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<description>This is default address for the timeline server to start the
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RPC server.</description>
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<name>yarn.timeline-service.address</name>
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<value>0.0.0.0:10200</value>
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<value>${yarn.timeline-service.hostname}:10200</value>
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</property>
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<property>
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@ -0,0 +1,225 @@
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~~ Licensed under the Apache License, Version 2.0 (the "License");
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~~ you may not use this file except in compliance with the License.
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~~ You may obtain a copy of the License at
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~~
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~~ http://www.apache.org/licenses/LICENSE-2.0
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~~
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~~ Unless required by applicable law or agreed to in writing, software
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~~ distributed under the License is distributed on an "AS IS" BASIS,
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~~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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~~ See the License for the specific language governing permissions and
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~~ limitations under the License. See accompanying LICENSE file.
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---
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YARN Timeline Server
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---
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---
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${maven.build.timestamp}
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YARN Timeline Server
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\[ {{{./index.html}Go Back}} \]
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%{toc|section=1|fromDepth=0|toDepth=3}
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* Overview
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Storage and retrieval of applications' current as well as historic
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information in a generic fashion is solved in YARN through the Timeline
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Server (previously also called Generic Application History Server). This
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serves two responsibilities:
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** Generic information about completed applications
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Generic information includes application level data like queue-name, user
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information etc in the ApplicationSubmissionContext, list of
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application-attempts that ran for an application, information about each
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application-attempt, list of containers run under each application-attempt,
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and information about each container. Generic data is stored by
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ResourceManager to a history-store (default implementation on a file-system)
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and used by the web-UI to display information about completed applications.
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** Per-framework information of running and completed applications
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Per-framework information is completely specific to an application or
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framework. For example, Hadoop MapReduce framework can include pieces of
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information like number of map tasks, reduce tasks, counters etc.
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Application developers can publish the specific information to the Timeline
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server via TimelineClient from within a client, the ApplicationMaster
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and/or the application's containers. This information is then queryable via
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REST APIs for rendering by application/framework specific UIs.
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* Current Status
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Timeline sever is a work in progress. The basic storage and retrieval of
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information, both generic and framework specific, are in place. Timeline
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server doesn't work in secure mode yet. The generic information and the
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per-framework information are today collected and presented separately and
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thus are not integrated well together. Finally, the per-framework information
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is only available via RESTful APIs, using JSON type content - ability to
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install framework specific UIs in YARN isn't supported yet.
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* Basic Configuration
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Users need to configure the Timeline server before starting it. The simplest
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configuration you should add in <<<yarn-site.xml>>> is to set the hostname of
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the Timeline server:
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+---+
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<property>
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<description>The hostname of the Timeline service web application.</description>
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<name>yarn.timeline-service.hostname</name>
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<value>0.0.0.0</value>
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</property>
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+---+
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* Advanced Configuration
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In addition to the hostname, admins can also configure whether the service is
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enabled or not, the ports of the RPC and the web interfaces, and the number
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of RPC handler threads.
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+---+
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<property>
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<description>Address for the Timeline server to start the RPC server.</description>
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<name>yarn.timeline-service.address</name>
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<value>${yarn.timeline-service.hostname}:10200</value>
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</property>
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<property>
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<description>The http address of the Timeline service web application.</description>
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<name>yarn.timeline-service.webapp.address</name>
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<value>${yarn.timeline-service.hostname}:8188</value>
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</property>
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<property>
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<description>The https address of the Timeline service web application.</description>
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<name>yarn.timeline-service.webapp.https.address</name>
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<value>${yarn.timeline-service.hostname}:8190</value>
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</property>
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<property>
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<description>Handler thread count to serve the client RPC requests.</description>
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<name>yarn.timeline-service.handler-thread-count</name>
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<value>10</value>
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</property>
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+---+
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* Generic-data related Configuration
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Users can specify whether the generic data collection is enabled or not, and
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also choose the storage-implementation class for the generic data. There are
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more configurations related to generic data collection, and users can refer
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to <<<yarn-default.xml>>> for all of them.
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+---+
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<property>
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<description>Indicate to ResourceManager as well as clients whether
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history-service is enabled or not. If enabled, ResourceManager starts
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recording historical data that Timelien service can consume. Similarly,
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clients can redirect to the history service when applications
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finish if this is enabled.</description>
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<name>yarn.timeline-service.generic-application-history.enabled</name>
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<value>false</value>
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</property>
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<property>
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<description>Store class name for history store, defaulting to file system
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store</description>
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<name>yarn.timeline-service.generic-application-history.store-class</name>
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<value>org.apache.hadoop.yarn.server.applicationhistoryservice.FileSystemApplicationHistoryStore</value>
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</property>
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+---+
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* Per-framework-date related Configuration
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Users can specify whether per-framework data service is enabled or not,
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choose the store implementation for the per-framework data, and tune the
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retention of the per-framework data. There are more configurations related to
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per-framework data service, and users can refer to <<<yarn-default.xml>>> for
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all of them.
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+---+
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<property>
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<description>Indicate to clients whether Timeline service is enabled or not.
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If enabled, the TimelineClient library used by end-users will post entities
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and events to the Timeline server.</description>
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<name>yarn.timeline-service.enabled</name>
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<value>true</value>
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</property>
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<property>
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<description>Store class name for timeline store.</description>
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<name>yarn.timeline-service.store-class</name>
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<value>org.apache.hadoop.yarn.server.applicationhistoryservice.timeline.LeveldbTimelineStore</value>
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</property>
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<property>
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<description>Enable age off of timeline store data.</description>
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<name>yarn.timeline-service.ttl-enable</name>
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<value>true</value>
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</property>
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<property>
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<description>Time to live for timeline store data in milliseconds.</description>
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<name>yarn.timeline-service.ttl-ms</name>
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<value>604800000</value>
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</property>
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+---+
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* Running Timeline server
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Assuming all the aforementioned configurations are set properly, admins can
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start the Timeline server/history service with the following command:
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+---+
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$ yarn historyserver
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+---+
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Or users can start the Timeline server / history service as a daemon:
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+---+
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$ yarn-daemon.sh start historyserver
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+---+
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* Accessing generic-data via command-line
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Users can access applications' generic historic data via the command line as
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below. Note that the same commands are usable to obtain the corresponding
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information about running applications.
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+---+
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$ yarn application -status <Application ID>
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$ yarn applicationattempt -list <Application ID>
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$ yarn applicationattempt -status <Application Attempt ID>
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$ yarn container -list <Application Attempt ID>
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$ yarn container -status <Container ID>
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+---+
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* Publishing of per-framework data by applications
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Developers can define what information they want to record for their
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applications by composing <<<TimelineEntity>>> and <<<TimelineEvent>>>
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objects, and put the entities and events to the Timeline server via
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<<<TimelineClient>>>. Below is an example:
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+---+
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// Create and start the Timeline client
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TimelineClient client = TimelineClient.createTimelineClient();
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client.init(conf);
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client.start();
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TimelineEntity entity = null;
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// Compose the entity
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try {
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TimelinePutResponse response = client.putEntities(entity);
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} catch (IOException e) {
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// Handle the exception
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} catch (YarnException e) {
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// Handle the exception
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}
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// Stop the Timeline client
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client.stop();
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+---+
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@ -43,7 +43,7 @@ MapReduce NextGen aka YARN aka MRv2
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* {{{./YARN.html}NextGen MapReduce}}
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* {{{./WritingYarnApplications.html}Writing Yarn Applications}}
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* {{{./WritingYarnApplications.html}Writing YARN Applications}}
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* {{{./CapacityScheduler.html}Capacity Scheduler}}
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@ -51,6 +51,8 @@ MapReduce NextGen aka YARN aka MRv2
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* {{{./WebApplicationProxy.html}Web Application Proxy}}
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* {{{./TimelineServer.html}YARN Timeline Server}}
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* {{{../../hadoop-project-dist/hadoop-common/CLIMiniCluster.html}CLI MiniCluster}}
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* {{{../../hadoop-mapreduce-client/hadoop-mapreduce-client-core/MapReduce_Compatibility_Hadoop1_Hadoop2.html}Backward Compatibility between Apache Hadoop 1.x and 2.x for MapReduce}}
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