delete file in hadoop

Learn about delete file in hadoop, we have the largest and most updated delete file in hadoop information on alibabacloud.com

Hadoop exception record cannot delete/tmp/hadoop/mapred/system. Name node is in safe mode.

Org. apache. hadoop. IPC. remoteException: Org. apache. hadoop. HDFS. server. namenode. safemodeexception: cannot delete/tmp/hadoop/mapred/system. name node is in safe mode. The ratio of reported blocks 0.7857 has not reached the threshold 0.9990. Safe mode will be turned off automatically. At org. Apache.

Hadoop learning notes: Analysis of hadoop File System

1. What is a distributed file system? A file system stored across multiple computers in a management network is called a distributed file system. 2. Why do we need a distributed file system? The reason is simple. When the data set size exceeds the storage capacity of an independent physical computer, it is necess

Hadoop practice 101: add and delete machines in a hadoop Cluster

ArticleDirectory Insecure Secure Mode No downtime is required for adding or deleting machines in the hadoop cluster, and the entire service is not interrupted. Before this operation, the hadoop cluster is as follows: HDFS machines are as follows: The MR machine is as follows: Add Machine On the master machine of the cluster, modify the $ hadoop_home/CONF/slaves

Hadoop Learning notes: A brief analysis of Hadoop file system

1. What is a distributed file system?A file system that is stored across multiple computers in a management network is called a distributed file system.2. Why do I need a distributed file system?The simple reason is that when the size of a dataset exceeds the storage capacity of a single physical computer, it is necess

Hadoop Learning notes: A brief analysis of Hadoop file system

1. What is a distributed file system?A file system that is stored across multiple computers in a management network is called a distributed file system.2. Why do I need a distributed file system?The simple reason is that when the size of a dataset exceeds the storage capacity of a single physical computer, it is necess

Cloud computing, distributed big data, hadoop, hands-on, 8: hadoop graphic training course: hadoop file system operations

This document describes how to operate a hadoop file system through experiments. Complete release directory of "cloud computing distributed Big Data hadoop hands-on" Cloud computing distributed Big Data practical technology hadoop exchange group:312494188Cloud computing practices will be released in the group every

Hadoop File System Shell

] [-R |-r] [-skiptrash] uri [uri ...] Deletes the file specified by the parameter. Parameters: -F forcibly removed. When performing the deletion, the analysis information of the file to be deleted is displayed, and the return information is not adjusted when the file does not exist; -R recursive removal of all contents

(4) Implement local file upload to Hadoop file system by calling Hadoop Java API

(1) First create Java projectSelect File->new->java Project on the Eclipse menu.and is named UploadFile.(2) Add the necessary Hadoop jar packagesRight-click the JRE System Library and select Configure build path under Build path.Then select Add External Jars. Add the jar package and all the jar packages under Lib to your extracted Hadoop source directory.All jar

HDFS File System Shell guide from hadoop docs

on error. Put Usage: hadoop FS-put Copy single SRC, or multiple SRCS from local file system to the destination filesystem. Also reads input from stdin and writes to destination filesystem. Hadoop FS-put localfile/user/hadoop/hadoopfile Hadoop FS-put localfile1 localfile

Add and delete nodes in Hadoop

Add, delete, and delete nodes in Hadoop. 1. Modify host as normal datanode. Add namenode ip2. modify namenode configuration file confslaves add ip or host3. on the machine of the new node, start the service [root @ slave-004hadoop] #. binhadoop-daemon.shstartdatanode [root @ slav Add,

Hadoop dynamic Join/delete nodes (Datanode and Tacktracker)

to view the PID and process name of the Java process on the machine.1.2 Delete Extreme is not recommended directly on the slave by:hadoop-daemon.sh Stop Datanodecommand to turn off Datanode. This causes the missing block to appear in HDFs.1. Change datanode-deny.list on Master to join the corresponding machine2, refresh the node configuration on master:Hadoop dfsadmin-refreshnodesAt this point in the Web UI you can immediately see that the node becom

Hadoop-2.5.2 cluster installation configuration details, hadoop configuration file details

Hadoop-2.5.2 cluster installation configuration details, hadoop configuration file details Reprinted please indicate the source: http://blog.csdn.net/tang9140/article/details/42869531 I recently learned how to install hadoop. The steps below are described in detailI. Environment I installed it in Linux. For students w

Hadoop shell command (based on Linux OS upload download file to HDFs file System Basic Command Learning)

Apache-->hadoop's official Website document Command learning:http://hadoop.apache.org/docs/r1.0.4/cn/hdfs_shell.html FS Shell The call file system (FS) shell command should use the bin/hadoop fs scheme://authority/path. For the HDFs file system, Scheme is HDFs, to the local file system, scheme is

Hadoop uses the filesystem API to perform Hadoop file read and write operations

Because HDFs is different from a common file system, Hadoop provides a powerful filesystem API to manipulate HDFs. The core classes are Fsdatainputstream and Fsdataoutputstream. Read operation: We use Fsdatainputstream to read the specified file in HDFs (the first experiment), and we also demonstrate the ability to locate the

[Hadoop] problem record: hadoop startup error under root user: File/user/root/input/slaves cocould only be replicated to 0 nodes, in

A virtual machine was started on Shanda cloud. The default user is root. An error occurred while running hadoop: [Error description] Root @ snda:/data/soft/hadoop-0.20.203.0 # bin/hadoop FS-put conf Input11/08/03 09:58:33 warn HDFS. dfsclient: datastreamer exception: Org. apache. hadoop. IPC. remoteException: Java. io.

Troubleshooting Hadoop startup error: File/opt/hadoop/tmp/mapred/system/jobtracker.info could only being replicated to 0 nodes, instead of 1

before yesterday formatted HDFS, each time the format (namenode format) will recreate a namenodeid, and the Dfs.data.dir parameter configuration of the directory contains the last format created by the ID, The ID in the directory configured with the Dfs.name.dir parameter is inconsistent. Namenode format empties the data under Namenode, but does not empty the data under Datanode, causing the startup to fail.Workaround: I am recreating the Dfs.data.dir specified folder and then modifying it into

Hadoop Tutorial (12) HDFs Add delete nodes and perform cluster balancing

HDFs Add Delete nodes and perform HDFs balance Mode 1: Static add Datanode, stop Namenode mode 1. Stop Namenode 2. Modify the slaves file and update to each node 3. Start Namenode 4. Execute the Hadoop balance command. (This is used for the balance cluster and is not required if you are just adding a node) ----------------------------------------- Mode 2:

Hadoop series HDFS (Distributed File System) installation and configuration

= $ path: $ hadoop_home/binExport hadoop_common_lib_native_dir = $ hadoop_home/lib/nativeExport hadoop_opts = "-djava. Library. Path = $ hadoop_home/lib"4.3 refresh Environment VariablesSource/etc/profile4.4 create a configuration file directoryMkdir-P/data/hadoop/{TMP, name, Data, VAR}5. Configure hadoop on 192.168.3.105.1 configure

Hadoop Learning Note 01--hadoop Distributed File system

Hadoop has a distributed system called HDFS , all known as Hadoop distributed Filesystem.HDFs has a block concept, and the default is that the file on 64mb,hdfs is divided into chunks of block size, as separate storage units. The advantage of using blocks is: 1. A file size can be larger than the capacity of any disk i

Spark WordCount Read-write HDFs file (read file from Hadoop HDFs and write output to HDFs)

0 Spark development environment is created according to the following blog:http://blog.csdn.net/w13770269691/article/details/15505507 http://blog.csdn.net/qianlong4526888/article/details/21441131 1 Create a Scala development environment in Eclipse (Juno version at least) Just install scala:help->install new Software->add Url:http://download.scala-ide.org/sdk/e38/scala29/stable/site Refer to:http://dongxicheng.org/framework-on-yarn/spark-eclipse-ide/ 2 write WordCount in eclipse with ScalaCr

Total Pages: 15 1 2 3 4 5 .... 15 Go to: Go

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.