Software Development

Apache Flume: Distributed Log Collection for Hadoop by Steve Hoffman

Posted On February 25, 2017 at 4:52 pm by / Comments Off on Apache Flume: Distributed Log Collection for Hadoop by Steve Hoffman

By Steve Hoffman

circulate information to Hadoop utilizing Apache Flume

Overview

  • Integrate Flume along with your information sources
  • Transcode your info en-route in Flume
  • Route and separate your facts utilizing common 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 bring info from purposes to Apache Hadoop's HDFS. It has an easy and versatile structure in line with streaming info flows. it's strong and fault tolerant with many failover and restoration mechanisms.

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

Apache Flume: dispensed Log assortment for Hadoop begins with an architectural review of Flume after which discusses every one part intimately. It publications you thru the entire install procedure and compilation of Flume.

It offers you a heads-up on find out how to use channels and channel selectors. for every architectural part (Sources, Channels, Sinks, Channel Processors, Sink teams, etc) a number of the implementations can be lined intimately in addition to configuration suggestions. you should use it to customise Flume for your particular wishes. There are tips given on writing customized implementations to boot that will assist you research and enforce them.

  • By the tip, you need to be in a position to build a chain of Flume brokers to move your streaming information and logs out of your platforms 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 whilst to exploit a reminiscence or file-backed channel
    • Understand and configure the Hadoop dossier procedure (HDFS) sink
    • Learn the best way to use sink teams to create redundant facts flows
    • Configure and use a number of resources for data
    • Inspect information documents and path to varied or a number of locations according to payload content
    • Transform facts en-route to Hadoop
    • Monitor your information flows

    Approach

    A starter consultant that covers Apache Flume in detail.

    Who this publication is written for

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

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    Extra resources for Apache Flume: Distributed Log Collection for Hadoop

    Sample text

    You'll want to size this higher if your ingestion is heavy enough that you can't tolerate normal planned or unplanned outages. For instance, there are many configuration changes you can make in Hadoop that require a cluster restart. If you have Flume writing important data into Hadoop, the file channel should be sized to tolerate the time it takes to restart Hadoop (and maybe add a comfort buffer for the unexpected). If your cluster or other systems are unreliable, you can set this higher to handle even larger amounts of downtime.

    The behavior of this grouping is dictated by something called the sink processor, which determines how events are routed. There is a default sink processor that contains a single sink that is used whenever you have a sink that isn't part of any sink group. Our Hello World example in Chapter 2, Flume Quick Start, used the default sink processor. No special configuration is necessary for single sinks. In order for Flume to know about the sink groups, there is a new top-level agent property called sinkgroups.

    MaxPenality is reached. Summary In this chapter we covered in depth the HDFS sink, the Flume output that writes streaming data into the HDFS. We covered how Flume can separate data into different HDFS paths based on time or contents of Flume headers. Several file-rolling techniques were also discussed including the following: • Time rotation • Event count rotation • Size rotation • Rotation on idle only [ 45 ] Sinks and Sink Processors Compression was discussed as a means to reduce storage requirements in HDFS and should be used when possible.

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