8/16/2023 0 Comments Hadoop command line find file![]() When reading binary edit logs, use recovery mode. Renumber the transaction IDs in the input, so that there are no gaps or invalid transaction IDs. ![]() Optional command line arguments: COMMAND_OPTION If the specified file exists, it will be overwritten, format of the file is determined by -p option Usage: hdfs oev -i INPUT_FILE -o OUTPUT_FILE Required command line arguments: COMMAND_OPTIONĮdits file to process, xml (case insensitive) extension means XML format, any other filename means binary format Specify mbean server (localhost by default) Specify mbean server port, if missing it will try to connect to MBean Server in the same VM Otherwise it returns those directories that are owned by the current user. When this is run as a super user, it returns all snapshottable directories. Get the list of snapshottable directories. Usage: hdfs lsSnapshottableDir COMMAND_OPTION Run HttpFS server, the HDFS HTTP Gateway. Returns the group information given one or more usernames. Gets configuration information from the configuration directory, post-processing. Gets a specific key from the configuration ![]() Gets the exclude file path that defines the datanodes that need to decommissioned. Gets the include file path that defines the datanodes that can join the cluster. Gets list of journal nodes in the cluster. Gets list of backup nodes in the cluster. Gets list of secondary namenodes in the cluster. Runs the HDFS filesystem checking utility. Initiate replication work to make mis-replicated blocks satisfy block placement policy. Print out maintenance state node details. ![]() Print out storage policy summary for the blocks. A dot is print every 100 files processed with or without this switch. Print out list of missing blocks and files they belong to.ĭeprecated. Include snapshot data if the given path indicates a snapshottable directory or there are snapshottable directories under it. Print out upgrade domains for every block. Print out network topology for data-node locations. Delegation token must have been fetched using the –renewer name option. Url to contact NN on (starts with http or https) envvarsĭisplay computed Hadoop environment variables. The various COMMAND_OPTIONS can be found at File System Shell Guide. Run a filesystem command on the file system supported in Hadoop. The latter is useful in environments where wildcards cannot be used and the expanded classpath exceeds the maximum supported command line length. Additional options print the classpath after wildcard expansion or write the classpath into the manifest of a jar file. If called without arguments, then prints the classpath set up by the command scripts, which is likely to contain wildcards in the classpath entries. Prints the class path needed to get the Hadoop jar and the required libraries. ![]() Write classpath as manifest in jar named path The commands have been grouped into User Commands and Administration Commands.Ĭommands useful for users of a hadoop cluster. Various commands with their options are described in the following sections. See the Hadoop Commands Manual for more information. The common set of options supported by multiple commands. These are documented on the Commands Manual page. Hadoop has an option parsing framework that employs parsing generic options as well as running classes. Running the hdfs script without any arguments prints the description for all commands.
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