Hi, the context object (passed to map(), reduce() and setup()) contains information about the input split, such as the file name.
From the top of my head: String fileName = ((FileSplit) context.getInputSplit()).getPath().getName(); Kai > Am 09.03.2015 um 16:39 schrieb xeonmailinglist-gmail > <xeonmailingl...@gmail.com>: > > Hi, > > I am looking to YARN MapReduce internals, and I would like know if it > possible to know which file a map/reduce function is reading or writing from > inside a map or reduce function defined by the user, or simply by the client? > > > Thanks, > > -- > -- > > Kai Voigt Am Germaniahafen 1 k...@123.org 24143 Kiel +49 160 96683050 Germany @KaiVoigt