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Registered: ‎04-22-2014

How hadoop support batch processing when its " Write once and read many time".

Hadoop is been told " Write  once and read many time".  For the batch processing data need to be updated, so how for batch processing hadoop can be used to reduce ETL workload from datawarehouse?

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Registered: ‎07-31-2013

Re: How hadoop support batch processing when its " Write once and read many time".

Updates can be done in a variety of ways depending on the use-case and volume of updates required, such by replacing/recomputing partitions or files that need updates, by using a store like HBase if random updates and reads are very frequent, etc..

It is not impossible as a problem to solve.
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