Hadoop Developer

Lazy evaluation in Spark means that the execution will not start until an action is triggered. The Spark Lazy evaluation, users can divide into smaller operations. It reduces the number of passes on data by transformation grouping operation. By lazy evaluation in Spark to saves the trip between driver and cluster, speed up the process. […]

Hive Partitions Create Hive Partition Table Create non-partition table Load data to non-partition table Set the Hive property Load data from non-partition to partition table Show All Partitions on Hive Table Add New Partition to the Hive Table Rename or Update Hive Partition Manually Renaming Partitions on HDFS When you manually modify the partitions directly […]

Start Hive Metastore Create Database SHOW DATABASES Use Database Describe Database Drop Database Hive DDL Table Commands Show Tables Describe Table Truncate Table Alter Table Drop Table Internal Tables External Table Hive – Load Data Into Table In hive with DML statements, we can add data to the Hive table in 2 different ways. Using INSERT […]

I have seen a many people those who want to switch their career from the Oracle DBA to the Hadoop but they are not sure how to start and from where to start it. after working so many years in the Oracle DBA Technology recently I have sw itch my career from the Oracle DBA […]