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From Nitin Pawar <nitinpawar...@gmail.com>
Subject Re: Detailing on how UPDATE is performed in Hive
Date Thu, 27 Nov 2014 12:05:53 GMT
https://cwiki.apache.org/confluence/display/Hive/Hive+Transactions

entire implementation is under jira here
https://issues.apache.org/jira/browse/HIVE-5317

On Thu, Nov 27, 2014 at 4:11 PM, unmesha sreeveni <unmeshabiju@gmail.com>
wrote:

> 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*
> http://www.unmeshasreeveni.blogspot.in/
>
>
>


-- 
Nitin Pawar

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