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By shamim_ru
via frommyworkshop.blogspot.ru
Submitted: Jul 10 2013 / 05:01

One of the main disadvantage of using PIG is that, Pig always raise all the data from Cassandra Storage, and after that it can filter by your choose. It's very easy to imagine how the workload will be if you have a tons of million rows in your CF. For example, in our production environment we have always more than 300 million rows, where only 20-25 millions of rows is unprocessed. When we are executing pig script, we have got more than 5000 map tasks with all the 300 millions of rows. It's time consuming and high load batch processing we always tried to avoid but in vain. It's could be very nice if we could use CQL query in pig scripts with where clause to select and filter our data. Here benefit is clear, less data will consume, less map task and a little workload.
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