{"id":137,"date":"2021-07-11T15:50:47","date_gmt":"2021-07-11T15:50:47","guid":{"rendered":"https:\/\/www.wikitechy.com\/interview-questions\/?p=137"},"modified":"2021-09-15T05:37:02","modified_gmt":"2021-09-15T05:37:02","slug":"what-is-channel-selectors","status":"publish","type":"post","link":"https:\/\/www.wikitechy.com\/interview-questions\/apache-flume\/what-is-channel-selectors\/","title":{"rendered":"What is Channel Selectors ?"},"content":{"rendered":"
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Channel Selectors<\/h2>\n<\/div>\n<\/div>\n
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    \n
  • \n
      \n
    • Channel selectors control and dividing the events and allocating a specific channel. They are default or replicated channel selectors.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
      \n
      <\/div>\n
      \"Apache<\/div>\n<\/div>\n
        \n
      • Replicated channel selectors can duplicate the information in multiple or all channels. Multiplexing channel selectors used to divide and aggregate the data based on the events header data.<\/li>\n
      • It means based on sinks destination, the event aggregate into the specific sink.<\/li>\n
      • Example: One sink associated with hadoop, another with S3 another with Hbase, at that time, Multiplexing channel selectors can divide the events and flow to the specific sink.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n
        \n
        \n
        <\/div>\n<\/div>\n<\/div>\n
        \n
        \"What<\/div>\n<\/div>\n

        Learn Flume \u2013 Flume tutorial \u2013\u00a0what are channel selectors\u00a0\u2013 Flume examples \u2013 Flume programs<\/p>\n

        \n
        \n
          \n
        • Overview and Architecture<\/b>, a source can write at least with one or more channels.<\/li>\n
        • This is reason the property is plural channels instead of channel.<\/li>\n
        • There are two ways multiple channels can be handled. The event can be written to every channel or to only one channel, based on some Flume header value.<\/li>\n
        • The internal mechanism for this in Flume is known as\u00a0channel selector.<\/b><\/li>\n
        • The selector for any channel can be determined using the\u00a0selector.type<\/code>\u00a0property.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n

          All selector-specific properties start with the typical Source prefix: the agent name, keyword sources, and source name:<\/p>\n

          <\/div> 
          agent.sources.s1.selector.type=replicating<\/code><\/pre> <\/div>\n","protected":false},"excerpt":{"rendered":"
          Answer-Channel selectors control and dividing the events and allocating a specific channel. They are default or replicated channel selectors.<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[369],"tags":[430,371,426,425,402,429,428,424,427,401,431,423,364],"class_list":["post-137","post","type-post","status-publish","format-standard","hentry","category-apache-flume","tag-an-event-in-flume-is-a-unit-of-data-that-flows-through","tag-apache-flume-example","tag-flume-1-6-user-guide","tag-flume-file-channel","tag-flume-http-source","tag-flume-interview-questions","tag-flume-interview-questions-and-answers-for-experienced","tag-flume-kafka-channel","tag-flume-spooldir","tag-flume-user-guide","tag-interceptors-are-part-of-flumes-extensibility-model","tag-supplied-interceptor-in-flume","tag-wells-fargo-interview-questions-and-answers"],"yoast_head":"\nWhat is Channel Selectors ? - Apache Flume Interview Questions<\/title>\n<meta name=\"description\" content=\"What is Channel Selectors ? 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