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From unmesha sreeveni <unmeshab...@gmail.com>
Subject Detailing on how UPDATE is performed in Hive
Date Thu, 27 Nov 2014 10:41:10 GMT
Hi friends
  Where can I find details on how update is performed in Hive.

​1. When an update is performed,whether HDFS will write that block
elsewhere with the new value.
2. whether the old block is unallocated and is allowed for further writes.
3. Whether this process create fragmentation ?
4. while creating a partitioned table, and update is performed ,whether the
partition is deleted and updated with new value or the entire block is
deleted and written once again?

where will be the good place to gather these knowlege​

*Thanks & Regards *

*Unmesha Sreeveni U.B*
*Hadoop, Bigdata Developer*
*Centre for Cyber Security | Amrita Vishwa Vidyapeetham*

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