【发布时间】:2017-09-11 11:32:42
【问题描述】:
您好,我对云计算很陌生,所以对于(也许)这个愚蠢的问题,我深表歉意。我需要帮助才能知道我所做的实际上是在集群上还是在主服务器上计算(无用的东西)。
我能做什么: 好吧,我可以使用 AWS 控制台设置一个包含一定数量节点的集群,并在所有节点上安装 Spark。我可以通过 SSH 连接到主节点。然后它需要什么才能在集群上运行我的带有 Spark 代码的 jar。
我会做什么: 我会调用 spark-submit 来运行我的代码:
spark-submit --class cc.Main /home/ubuntu/MySparkCode.jar 3 [arguments]
我的疑惑:
是否需要用--master 和 大师的“spark://”参考?我在哪里可以找到那个 参考?我应该在 sbin/start-master.sh 中运行脚本来启动吗 一个独立的集群管理器还是已经设置好了?如果我运行代码 上面我想代码只能在主机上本地运行, 对吗?
我可以只在主节点上保留我的输入文件吗?假设我想要 要计算一个巨大的文本文件的字数,我可以只保留在 主盘?或者为了保持并行性,我需要一个 像 HDFS 这样的分布式内存?没看懂,留着 如果合适,在主节点磁盘上。
非常感谢您的回复。
更新1: 我尝试在集群上运行 Pi 示例,但无法得到结果。
$ sudo spark-submit --class org.apache.spark.examples.SparkPi --master yarn --deploy-mode cluster /usr/lib/spark/examples/jars/spark-examples.jar 10
我希望得到一行打印的 Pi is roughly 3.14... 而不是:
17/04/15 13:16:01 WARN NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
17/04/15 13:16:03 INFO RMProxy: Connecting to ResourceManager at ip-172-31-37-222.us-west-2.compute.internal/172.31.37.222:8032
17/04/15 13:16:03 INFO Client: Requesting a new application from cluster with 2 NodeManagers
17/04/15 13:16:03 INFO Client: Verifying our application has not requested more than the maximum memory capability of the cluster (5120 MB per container)
17/04/15 13:16:03 INFO Client: Will allocate AM container, with 5120 MB memory including 465 MB overhead
17/04/15 13:16:03 INFO Client: Setting up container launch context for our AM
17/04/15 13:16:03 INFO Client: Setting up the launch environment for our AM container
17/04/15 13:16:03 INFO Client: Preparing resources for our AM container
17/04/15 13:16:06 WARN Client: Neither spark.yarn.jars nor spark.yarn.archive is set, falling back to uploading libraries under SPARK_HOME.
17/04/15 13:16:10 INFO Client: Uploading resource file:/mnt/tmp/spark-aa757ca0-4ff7-460c-8bee-27bc8c8dada9/__spark_libs__5838015067814081789.zip -> hdfs://ip-172-31-37-222.us-west-2.compute.internal:8020/user/root/.sparkStaging/application_1492261407069_0007/__spark_libs__5838015067814081789.zip
17/04/15 13:16:12 INFO Client: Uploading resource file:/usr/lib/spark/examples/jars/spark-examples.jar -> hdfs://ip-172-31-37-222.us-west-2.compute.internal:8020/user/root/.sparkStaging/application_1492261407069_0007/spark-examples.jar
17/04/15 13:16:12 INFO Client: Uploading resource file:/mnt/tmp/spark-aa757ca0-4ff7-460c-8bee-27bc8c8dada9/__spark_conf__1370316719712336297.zip -> hdfs://ip-172-31-37-222.us-west-2.compute.internal:8020/user/root/.sparkStaging/application_1492261407069_0007/__spark_conf__.zip
17/04/15 13:16:13 INFO SecurityManager: Changing view acls to: root
17/04/15 13:16:13 INFO SecurityManager: Changing modify acls to: root
17/04/15 13:16:13 INFO SecurityManager: Changing view acls groups to:
17/04/15 13:16:13 INFO SecurityManager: Changing modify acls groups to:
17/04/15 13:16:13 INFO SecurityManager: SecurityManager: authentication disabled; ui acls disabled; users with view permissions: Set(root); groups with view permissions: Set(); users with modify permissions: Set(root); groups with modify permissions: Set()
17/04/15 13:16:13 INFO Client: Submitting application application_1492261407069_0007 to ResourceManager
17/04/15 13:16:13 INFO YarnClientImpl: Submitted application application_1492261407069_0007
17/04/15 13:16:14 INFO Client: Application report for application_1492261407069_0007 (state: ACCEPTED)
17/04/15 13:16:14 INFO Client:
client token: N/A
diagnostics: N/A
ApplicationMaster host: N/A
ApplicationMaster RPC port: -1
queue: default
start time: 1492262173096
final status: UNDEFINED
tracking URL: http://ip-172-31-37-222.us-west-2.compute.internal:20888/proxy/application_1492261407069_0007/
user: root
17/04/15 13:16:15 INFO Client: Application report for application_1492261407069_0007 (state: ACCEPTED)
17/04/15 13:16:24 INFO Client: Application report for application_1492261407069_0007 (state: ACCEPTED)
17/04/15 13:16:25 INFO Client: Application report for application_1492261407069_0007 (state: RUNNING)
17/04/15 13:16:25 INFO Client:
client token: N/A
diagnostics: N/A
ApplicationMaster host: 172.31.33.215
ApplicationMaster RPC port: 0
queue: default
start time: 1492262173096
final status: UNDEFINED
tracking URL: http://ip-172-31-37-222.us-west-2.compute.internal:20888/proxy/application_1492261407069_0007/
user: root
17/04/15 13:16:26 INFO Client: Application report for application_1492261407069_0007 (state: RUNNING)
17/04/15 13:16:55 INFO Client: Application report for application_1492261407069_0007 (state: RUNNING)
17/04/15 13:16:56 INFO Client: Application report for application_1492261407069_0007 (state: FINISHED)
17/04/15 13:16:56 INFO Client:
client token: N/A
diagnostics: N/A
ApplicationMaster host: 172.31.33.215
ApplicationMaster RPC port: 0
queue: default
start time: 1492262173096
final status: SUCCEEDED
tracking URL: http://ip-172-31-37-222.us-west-2.compute.internal:20888/proxy/application_1492261407069_0007/
user: root
17/04/15 13:16:56 INFO ShutdownHookManager: Shutdown hook called
17/04/15 13:16:56 INFO ShutdownHookManager: Deleting directory /mnt/tmp/spark-aa757ca0-4ff7-460c-8bee-27bc8c8dada9
【问题讨论】:
-
你可以试试下面这个。
sudo spark-submit --class org.apache.spark.examples.SparkPi --master yarn /usr/lib/spark/examples/jars/spark-examples.jar 10 -
@ArvindKumarAnugula 谢谢你的工作,尽管我们不使用 --deploy-mode,但我们确定它仍然会在集群上运行吗?
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@ArvindKumarAnugula 有效,但它在客户端模式下运行:(
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是的,它在客户端模式下运行。但客户端模式并不意味着任务在一个节点上运行。您可以看到显示任务 ID 并在特定节点上完成的日志信息。您可以观察到不同的任务在不同的节点上执行。但我接受该作业也应该在集群模式下运行。我正在检查它,一旦我有进展就更新你。
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@ArvindKumarAnugula 谢谢你,我很困惑,我也在努力理解它。我会将您的答案标记为最后的解决方案。
标签: amazon-web-services apache-spark cloud hdfs emr