Software Development

Read e-book online Apache Flume: Distributed Log Collection for Hadoop PDF

By Steve Hoffman

ISBN-10: 1782167919

ISBN-13: 9781782167914

move information to Hadoop utilizing Apache Flume

Overview

  • Integrate Flume along with your information sources
  • Transcode your information en-route in Flume
  • Route and separate your info utilizing normal expression matching
  • Configure failover paths and load-balancing to take away unmarried issues of failure
  • Utilize Gzip Compression for documents written to HDFS

In Detail

Apache Flume is a dispensed, trustworthy, and to be had provider for successfully amassing, aggregating, and relocating quite a lot of log facts. Its major aim is to carry facts from purposes to Apache Hadoop's HDFS. It has an easy and versatile structure according to streaming info flows. it's powerful and fault tolerant with many failover and restoration mechanisms.

Apache Flume: allotted Log assortment for Hadoop covers issues of HDFS and streaming data/logs, and the way Flume can unravel those difficulties. This ebook explains the generalized structure of Flume, such as relocating information to/from databases, NO-SQL-ish information shops, in addition to optimizing functionality. This ebook comprises real-world eventualities on Flume implementation.

Apache Flume: dispensed Log assortment for Hadoop begins with an architectural evaluate of Flume after which discusses each one part intimately. It publications you thru the total set up strategy and compilation of Flume.

It offers you a heads-up on tips on how to use channels and channel selectors. for every architectural part (Sources, Channels, Sinks, Channel Processors, Sink teams, and so forth) many of the implementations may be coated intimately in addition to configuration strategies. you should use it to customise Flume for your particular wishes. There are guidelines given on writing customized implementations besides that will assist you research and enforce them.

  • By the tip, you need to be in a position to build a sequence of Flume brokers to move your streaming facts and logs out of your structures into Hadoop in close to genuine time.
  • What you'll study from this book

    • Understand the Flume architecture
    • Download and set up open resource Flume from Apache
    • Discover while to take advantage of a reminiscence or file-backed channel
    • Understand and configure the Hadoop dossier process (HDFS) sink
    • Learn the way to use sink teams to create redundant information flows
    • Configure and use numerous assets for data
    • Inspect facts documents and path to diversified or a number of locations in line with payload content
    • Transform information en-route to Hadoop
    • Monitor your info flows

    Approach

    A starter consultant that covers Apache Flume in detail.

    Who this ebook is written for

    Apache Flume: dispensed Log assortment for Hadoop is meant for those that are liable for relocating datasets into Hadoop in a well timed and trustworthy demeanour like software program engineers, database directors, and information warehouse administrators.

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    Extra resources for Apache Flume: Distributed Log Collection for Hadoop

    Example text

    There are many sources available with the Flume distribution as well as many open source options available. source. AbstractSource class. Since the primary focus of this book is ingesting files of logs into Hadoop, we'll cover a few of the more appropriate sources to accomplish this. 9 releases, you'll notice that the TailSource is no longer part of Flume. org/wiki/Tail_(Unix)) any file on the system and create Flume events for each line of the file. Many have already used the filesystem as a handoff point between the application creating the data (for instance, log4j) and the mechanism responsible for moving those files someplace else (for instance, syslog).

    Using this configuration, let's run the agent and connect to it using the Linux netcat utility to send an event. 1 Next, let's briefly look at the help command. /bin/flume-ng [options]... commands: help display this help text agent run a Flume agent avro-client run an avro Flume client version show Flume version info global options: --conf,-c --classpath,-C use configs in directory append to the classpath --dryrun,-d do not actually start Flume, just print the command -Dproperty=value sets a JDK system property value agent options: --conf-file,-f specify a config file (required) --name,-n the name of this agent (required) --help,-h display help text [ 19 ] Flume Quick Start avro-client options: --dirname

    directory to stream to avro source --host,-H hostname to which events will be sent (required) --port,-p port of the avro source (required) --filename,-F input] text file to stream to avro source [default: std --headerFile,-R headerFile containing headers as key/value pairs on each new line --help,-h display help text Note that if the directory is specified, then it is always included first in the classpath.

    Sources and Channel Selectors Furthermore, if the rate of data written to a file exceeded the rate Flume could read the data, it is possible to lose one or more logfiles of input outright. log. log. Let's say you had a favorable review in the press and your application logs are much higher than usual. 1. 2. 1. This kind of data loss would go completely unnoticed and is something we want to avoid if possible. log FlameAgent FlameAgent For these reasons, it was decided to remove the tail functionality from Flume when it was refactored.

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    Apache Flume: Distributed Log Collection for Hadoop by Steve Hoffman


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