HDFS - hdfs command line

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hdfs client which is an alias for HDFS - Fs Shell ??


hdfs [--config confdir] [--loglevel loglevel] COMMAND

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Aws - S3 (Amazon Simple Storage Service)

S3 (ie Simple Storage Service) is a edge storage file system in Aws based on Hadoop File System Amazon S3 uses dense storage drives that are optimized for storing larger objects inexpensively. Amazon...
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File - File System (filesystem)

A file system (often also written as filesystem) is an application that stores and organizes files and their data (content). Essentially, it organizes these files for storage, organization, manipulation,...
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HDFS - Block

in HDFS. The block size can be changed by file. Block are stored on a datanode and are grouped in block pool The location on where the blocks are stored is defined in hdfs-site.xml....
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HDFS - Client Connection

A client establishes a connection to a configurable TCP port on the NameNode machine. It talks the ClientProtocol with the NameNode. A Remote Procedure Call (RPC) abstraction wraps both the Client Protocol...
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HDFS - Cluster

An HDFS cluster consists of: a single NameNode (the head node) managing the file system. The NameNode is the arbitrator and repository for all HDFS metadata. a number of DataNodes, usually one per...
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HDFS - Configuration (hdfs-site.xml)

HDFS follows the same configuration scheme than the whole Hadoop platform. See The configuration are split between two files: hdfs-site.xml, which provides default behaviors for the HDFS client. ...
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The DFSAdmin is a sub-command of the hdfs command line and is used for administering an HDFS cluster. These are commands that are used only by an HDFS administrator. dfsadmin is a subcommand of...
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HDFS - Fs Shell

Fs Shell is a client command line tool to manage HDFS. where: hadoop is the hadoop client hdfs is command is a file system command (ie ls, cat, ...) uri is For copy, you can also use...
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HDFS - Hadoop Archive file (har)

in the Hadoop context. An archive: exposes itself as a hdfs file system layer. All the fs shell commands in the archives work then but with a different . is immutable. Rename’s, deletes and...
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HDFS - Heartbeat (Dead datanode)

Each DataNode sends a Heartbeat message to the NameNode periodically. The NameNode marks DataNodes without recent Heartbeats as dead and does not forward any new IO requests to them. The time-out...

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