{"id":155,"date":"2021-07-12T05:19:41","date_gmt":"2021-07-12T05:19:41","guid":{"rendered":"https:\/\/www.wikitechy.com\/interview-questions\/?p=155"},"modified":"2021-09-15T05:11:14","modified_gmt":"2021-09-15T05:11:14","slug":"what-is-the-internal-architecture-of-apache-pig","status":"publish","type":"post","link":"https:\/\/www.wikitechy.com\/interview-questions\/apache-pig\/what-is-the-internal-architecture-of-apache-pig\/","title":{"rendered":"What is the internal architecture of Apache Pig ?"},"content":{"rendered":"
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\n

Internal architecture of Apache Pig<\/h2>\n<\/div>\n<\/div>\n
\n
\n
    \n
  • Pig Latin consist of pig to analyze the data from Hadoop.<\/li>\n
  • Its a highlevel data processing language it perform various operations like data types and operators.<\/li>\n
  • To perform a particular task Pig Script is used and execution mechanisms like(Grunt Shell, UDFs, Embedded).<\/li>\n
  • To produce the desired output continuous transformations applied in Pig Framework.<\/li>\n
  • Programmer\u2019s job become easier when converting these scripts into a series of MapReduce jobs.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n
    \n
    \n
    <\/div>\n<\/div>\n<\/div>\n
    \"Pig<\/div>\n
    \n
    \n

    Apache Pig Components<\/h2>\n<\/div>\n<\/div>\n
    \n
    \n
      \n
    • There are various components in the Apache Pig framework.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n
      \n

      Parser<\/h2>\n<\/div>\n
      \n
      \n
        \n
      • The Pig Scripts are handled by the Parser.It checks the syntax,type checking, and other miscellaneous checks.The output will be like a DAG (directed acyclic graph), which represents the Pig Latin statements and logical operators.<\/li>\n
      • In the DAG, the logical operators of the script are represented as nodes and therefore the data flows are represented as edges.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n
        \n

        Optimizer<\/h2>\n<\/div>\n
        \n
        \n
          \n
        • The logical plan DAG is passed to the logical optimizer,it carries out the logical optimizations,projection and pushdown.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n
          \n

          Compiler<\/h2>\n<\/div>\n
          \n
          \n
            \n
          • It compiles the optimized logical plan into a series of MapReduce jobs.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n
            \n

            Execution engine<\/h2>\n<\/div>\n
            \n
            \n
              \n
            • Producing the desired results MapReduce jobs are executed on Hadoop.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n
              \n
              \"Pig<\/div>\n<\/div>\n<\/div>\n<\/div>\n
              \n

              Pig Latin Data Model<\/h2>\n<\/div>\n
              \n
              \n
                \n
              • It allows datatypes such as map and tuple and it representation of Pig Latin\u2019s data model.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n
                \n

                Atom<\/h2>\n<\/div>\n
                \n
                \n
                  \n
                • Any single value in Pig Latin, irrespective of their data, type is known as an Atom.<\/li>\n
                • Values of Pig in Atom are number,int,long,float,double,chararray, and bytearray.<\/li>\n
                • Field define as a piece of data or a simple atomic value. Example \u2212 \u2018xxx\u2019 or \u201830\u2019<\/li>\n<\/ul>\n<\/div>\n<\/div>\n
                  \n

                  Tuple<\/h2>\n<\/div>\n
                  \n
                  \n
                    \n
                  • A record formed by ordered set of fields is known as a tuple. A tuple is similar to a row in a table of RDBMS. Example \u2212 (xxx, 30)<\/li>\n<\/ul>\n<\/div>\n<\/div>\n
                    \n

                    Bag<\/h2>\n<\/div>\n
                    \n
                    \n
                      \n
                    • Is an unordered set of tuples.<\/li>\n
                    • A collection of tuples (non-unique) is known as a bag.Tuple have any number of fields (flexible schema).<\/li>\n
                    • No need that every tuple contain the same number of fields and the same position (column) have the same type.\n
                        \n
                      • Example<\/b>\u00a0\u2212 {(xxx, 30), (yyyy, 45)}<\/li>\n<\/ul>\n<\/li>\n
                      • A Field contains bags in context its called inner bags.\n
                          \n
                        • Example<\/b>\u00a0\u2212 {xxx, 30, {98xxxxx22,\u00a0xxxx@gmail.com,}}<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/div>\n<\/div>\n
                          \n

                          Map<\/h2>\n<\/div>\n
                          \n
                          \n
                            \n
                          • Map is a set of key-value pairs the key define as chararray and its unique.<\/li>\n
                          • It is represented by \u2018[]\u2019 Example \u2212 [name#xxx, age#30]<\/li>\n<\/ul>\n<\/div>\n<\/div>\n
                            \n

                            Relation<\/h2>\n<\/div>\n
                            \n
                            \n
                              \n
                            • A relation is a bag of tuples.Pig Latin relations are unordered (there is no guarantee that tuples are processed in any particular order).<\/li>\n<\/ul>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

                              Answer:Pig Latin consist of pig to analyze the data from Hadoop<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[456],"tags":[195,365,460,509,491,203,199,214,209,488,205,465,485,486,222,484,515,490,196,286,207,487,217,516,512,477,508,517,518,519,461,513,468,463,489,462,493,367,514,483,492,200,197,280,364,285],"class_list":["post-155","post","type-post","status-publish","format-standard","hentry","category-apache-pig","tag-accenture-interview-questions-and-answers","tag-amazon-development-centre-india-pvt-ltd-interview-questions-and-answers","tag-apache-pig-architecture-diagram","tag-apache-pig-interview-questions","tag-applied-materials-interview-questions-and-answers","tag-capgemini-interview-questions-and-answers","tag-casting-networks-india-pvt-limited-interview-questions-and-answers","tag-cgi-group-inc-interview-questions-and-answers","tag-collabera-technologies-interview-questions-and-answers","tag-crisil-limited-interview-questions-and-answers","tag-dell-international-services-india-pvt-ltd-interview-questions-and-answers","tag-different-ways-of-executing-pig-script","tag-ernst-young-interview-questions-and-answers","tag-exide-industries-interview-questions-and-answers","tag-flipkart-interview-questions-and-answers","tag-genpact-interview-questions-and-answers","tag-hadoop-pig-architecture","tag-hexaware-technologies-interview-questions-and-answers","tag-ibm-interview-questions-and-answers","tag-lt-infotech-interview-questions-and-answers","tag-mphasis-interview-questions-and-answers","tag-myntra-designs-pvt-ltd-interview-questions-and-answers","tag-peoplestrong-interview-questions-and-answers","tag-pig-architecture","tag-pig-architecture-in-hadoop","tag-pig-interview-questions","tag-pig-interview-questions-and-answers","tag-pig-interview-questions-and-answers-for-experienced","tag-pig-interview-questions-for-experienced","tag-pig-interview-questions-for-experienced-and-freshers","tag-pig-latin-application-flow","tag-pig-latin-data-model","tag-pig-practice-questions","tag-processing-data-using-apache-pig","tag-prokarma-softech-nterview-questions-and-answers","tag-properties-of-pig","tag-quintiles-interview-questions-and-answers","tag-rbs-india-development-centre-pvt-ltd-interview-questions-and-answers","tag-relational-operators-in-pig","tag-reliance-industries-ltd-interview-questions-and-answers","tag-syngene-international-limited-interview-questions-and-answers","tag-tech-mahindra-interview-questions-and-answers","tag-unitedhealth-group-interview-questions-and-answers","tag-virtusa-consulting-services-pvt-ltd-interview-questions-and-answers","tag-wells-fargo-interview-questions-and-answers","tag-xoriant-solutions-pvt-ltd-interview-questions-and-answers"],"yoast_head":"\nWhat is the internal architecture of Apache Pig ? 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