Thanks Ram. If I didn’t want dynamic partitioning and just round robin on a fixed # of partitions, can it just be set through a property? If so, what is the property?
From: Munagala Ramanath <[email protected]> Reply-To: "[email protected]" <[email protected]> Date: Friday, August 12, 2016 at 12:50 PM To: "[email protected]" <[email protected]> Subject: Re: Round Robin Partitioning with Dynamic Partitioning Alex, Please take a look at: https://github.com/DataTorrent/examples/blob/master/tutorials/dynamic-partition/src/main/java/com/example/dynamic/Gen.java It shows an operator that implements both the Partitioner and the StatsListener interface. The processStats() method of the latter interface checks the number of emitted tuples from the argument and, if the count exceeds 500, it sets the number of partitions to MAX_PARTITIONS (which is 4). The number of partitions initially starts out at 2. The definePartitions() method of the former interface checks the desired number of partitions and if it differs from the current partition count, it performs a dynamic repartition. If you turn on DEBUG, you should see log messages at some of these steps. Naturally, this is a contrived example to illustrate how to exercise the functionality. Let me know if any of this is not clear or if you have further questions. Ram On Fri, Aug 12, 2016 at 9:36 AM, McCullough, Alex <[email protected]<mailto:[email protected]>> wrote: I can’t find any examples of how to set round robin partitioning or how to set dynamic partitioning, are there any example applications I can look at? The DataTorrent/Examples github page has a dynamic partitioning example but it just looks to be a shell, I don’t see any actual logic implemented… Thanks, Alex ________________________________ The information contained in this e-mail is confidential and/or proprietary to Capital One and/or its affiliates and may only be used solely in performance of work or services for Capital One. The information transmitted herewith is intended only for use by the individual or entity to which it is addressed. If the reader of this message is not the intended recipient, you are hereby notified that any review, retransmission, dissemination, distribution, copying or other use of, or taking of any action in reliance upon this information is strictly prohibited. If you have received this communication in error, please contact the sender and delete the material from your computer. ________________________________________________________ The information contained in this e-mail is confidential and/or proprietary to Capital One and/or its affiliates and may only be used solely in performance of work or services for Capital One. The information transmitted herewith is intended only for use by the individual or entity to which it is addressed. If the reader of this message is not the intended recipient, you are hereby notified that any review, retransmission, dissemination, distribution, copying or other use of, or taking of any action in reliance upon this information is strictly prohibited. If you have received this communication in error, please contact the sender and delete the material from your computer.
