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the leading '-'character inCMD Dfsadmin command reference The ''dfs "module provides operation commands for files and directories, and" dfsadmin "provides operations for managing the entire file system. Global Status information:PassBin/hadoop dfsadmin-Report command, we can get a global status report. This report contains basic information about the HDFS cluster, and of course there are some situations for each machine. Detailed status information:You can

datadir directory. The file contains only one row and the content is the ID number in server. ID corresponding to the node. 6) Start the zookeeper service: Java-CP zookeeper. Jar: LibLog4j-1.2.15.jar: Conf\ Org. Apache. zookeeper. server. Quorum. quorumpeermain zoo. cfg You can also useBin/zkserver. ShThe script starts the zookeeper service. 7) test whether the service is available through the zookeeper client: Run the following comman

C # winfrom implements analog ftp file management, Using System; using System. collections. generic; using System. text; using System. net; using System. IO; using System. windows. forms; namespace ConvertData {class FtpUpDown {string ftpServerIP; string ftpUserID; string ftpPassword; FtpWebRequest reqFTP; private void Connect (String path) // connect to ftp {// create FtpWebRequest object reqFTP = (FtpWebRequest) FtpWebRequest according to uri. create (new Uri (path); // specify the data transm

as the new version of the SDK is released, it is best to specify the variables to be set in the activation script. Activate and use different scripts to set different variables in the bash environment (Linux and Mac OS X and Windows environments ).Windows On Windows, usebin\activate\activate.batThe batchcompute script can also be usedsetxTools or control panel activation for permanent use.Linux/Mac OS X In Linux and Mac OS Xsource bin/activate/activa

the process fails, the zookeeper service will be suspended. Single-instance startup is the best for the development environment. If you want to start the replication mode, see running replicated zookeeper. managing zookeeper storage for zookeeper services that run in the production environment for a long time, the storage must be managed (datadir and logs). For more information, see maintenance Connecting to zookeeperIf zookeeper is already running, you can use the following options to connect