All of the big data enterprises today use Apache Hadoop in some way or the other. Hadoop is by no means an out-of-the-box solution. Hadoop is open source system but to simplify working with Hadoop, many enterprise versions like Cloudera, MapR and Hortonworks are available in market. Vendor distributions are aimed at overcoming the issues that the users typically encounter in the standard editions. Think of various distribution of Linux like Red Hat.
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