That configuration is for dag scheduler MRR which was written for MR compatibility. The default dag scheduler is dag scheduler natural order. So that conf is inactive by default.
The config you are looking for is ShuffleVertexManager. TEZ_AM_SHUFFLE_VERTEX_MANAGER_MIN_SRC_FRACTION Bikas -----Original Message----- From: Rohini Palaniswamy [mailto:rohini.adi...@gmail.com] Sent: Wednesday, July 23, 2014 4:38 PM To: d...@tez.apache.org Subject: Slow start of tasks Hi, Is TEZ_AM_SLOWSTART_DAG_SCHEDULER_MIN_SHUFFLE_RESOURCE_FRACTION the setting that controls when to start the next vertex? I was just thinking that if it was a vertex level setting, in cases of unsorted edges we should be able to start the next vertex as soon as 1 task in previous vertex finishes. Will specially be useful with cases like LIMIT. Regards, Rohini -- 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.
