hadoop datanode-阿里云

Hadoop: 启动后发现没有DataNode 错误原因DataNode的ClusterID与NameNode的ClusterID不完全一致。解决办法先找到hadoop所在的路径。例如，cd /usr/local/src/hadoop/hadoop-2.7.7找到同时有data文件夹和name文件夹的目录。例如，cd hdfs打开name文件夹里...

hadoop datanode进程不能启动如果当我们启动hdfs时，namenode启动成功，而对应的datanode不能启动一般需要重新格式化namenode，注意一点就是在格式化之前要删除logs和data文件夹，前者为保存hadoop下保存日志的文件夹，后者一般是保存tmp文件夹，改路径是自己设定的，可以去core-site文件中进行...

快速掌握Hadoop集成Kerberos安全技术

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大数据实战项目：反爬虫系统（Lua+Spark+Redis+Hadoop框架搭建）第一阶段

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大数据实战项目：反爬虫系统（Lua+Spark+Redis+Hadoop框架搭建）第二阶段

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Apache Hadoop 答疑：解决 Apache Hadoop 启动时 DataNode 启动异常的问题文章目录前言一、启动 HDFS 并显示当前所有 Java 进程二、DataNode 启动异常场景描述三、DataNode 启动异常解决方式四、Web 界面检查 Hadoop 信息总结前言本文用于解决 Apache Hadoop 启动时 DataNode 启动异常的问题，但是请注意这会删除 HDFS ...

Hadoop中的DataNode、工作机制、数据完整性、掉线时限参数设置 @[toc]10.DataNode10.1DataNode工作机制（1）一个数据块在DataNode上以文件形式存储在磁盘上，包括两个文件，一个是数据本身，一个是元数据包括数据块的长度，块数据的校验和，以及时间戳。（2）DataNode启动后向NameNode注册，通过后，周期性（6小时）的向Nam...

请教一个 hadoop 问题：5个datanode 节点，硬盘空间使用量分别是 1台89%，1台85 请教一个 hadoop 问题：5个datanode 节点，硬盘空间使用量分别是 1台89%，1台85%，3台75%，结果发现上传数据到 hdfs 失败，没有空间了。。。请教大家，这个问题怎么查？...

Hadoop集群改名导致无法启动DataNode 之前集群能够启动各个节点的。因为最近集群改名了，启动NameNode可以的。启动DataNode没有任何提示。进入hadoop logs目录查找hadoop-root-datanode-bd-cluster1.log文件发现下面的错误。错误关键信息： org.apache.hadoop.hdfs.s...

Hadoop集群中的DataNode进程的作用是什么呢？ Hadoop集群中的DataNode进程的作用是什么呢？...

hadoop Datanode的文件块（block）是什么？ hadoop Datanode的文件块（block）是什么？...

Hadoop 的 DataNode 宕机怎么恢复？ Hadoop 的 DataNode 宕机怎么恢复？...

Hadoop HDFS的数据节点DataNode有什么作用？ Hadoop HDFS的数据节点DataNode有什么作用？...

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