Thanks Arun! I do think we are on the bleeding edge of YARN, because everyone else in our application space generates MapReduce (Pig, Hive), or they have overlaid their legacy server-grid on Hadoop. I will explore both resources you mentioned to see where the development community is headed. Cheers, john
From: Arun Murthy [mailto:a...@hortonworks.com] Sent: Wednesday, June 25, 2014 11:50 PM To: user@hadoop.apache.org Subject: Re: persisent services in Hadoop John, We are excited to see ISVs like you get value from YARN, and appreciate the patience you've already shown in the past to work through the teething issues of YARN & hadoop-2.x. W.r.t long-running services, the most straight-forward option is to go through Apache Slider (http://slider.incubator.apache.org/). Slider has already made good progress in supporting various long-running services such as Apache HBase, Apache Accumulo & Apache Storm. I'm very sure the Slider community would be very welcoming of your use-cases, suggestions etc. - particularly as they are gearing up to support various applications atop; and would love your feedback. Furthemore, there is work going on in YARN itself to better support your use case: https://issues.apache.org/jira/browse/YARN-896. Again, your feedback there is very, very welcome. Also, you might be interested in https://issues.apache.org/jira/browse/YARN-1530 which provides a generic framework for collecting application metrics for YARN applications. Hope that helps. thanks, Arun On Wed, Jun 25, 2014 at 1:48 PM, John Lilley <john.lil...@redpoint.net<mailto:john.lil...@redpoint.net>> wrote: We are an ISV that currently ships a data-quality/integration suite running as a native YARN application. We are finding several use cases that would benefit from being able to manage a per-node persistent service. MapReduce has its “shuffle auxiliary service”, but it isn’t straightforward to add auxiliary services because they cannot be loaded from HDFS, so we’d have to manage the distribution of JARs across nodes (please tell me if I’m wrong here…). Given that, is there a preferred method for managing persistent services on a Hadoop cluster? We could have an AM that creates a set of YARN tasks and just waits until YARN gives a task on each node, and restart any failed tasks, but it doesn’t really fit the AM/container structure very well. I’ve also read about Slider, which looks interesting. Other ideas? --john -- -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/ CONFIDENTIALITY NOTICE NOTICE: This message is intended for the use of the individual or entity to which it is addressed and may contain information that is confidential, privileged and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, you are hereby notified that any printing, copying, dissemination, distribution, disclosure or forwarding of this communication is strictly prohibited. If you have received this communication in error, please contact the sender immediately and delete it from your system. Thank You.
