Batch Ingestion: Map Side Speculative Setting

Hi, recommended batch ingestion settings of map side speculative is list as below,

mapreduce.map.speculative

false

``

I can understand that no reduce side speculative executions can avoid some issues, but how about the map side? Is it necessary?

ping

在 2016年6月20日星期一 UTC+8下午2:02:30,Ninglin Du写道:

Hey Ninglin,

I can’t think of a good reason for disabling map side speculation, but maybe something’s slipping my mind…