Anil is correct: mapred.tasktracker.{map,reduce}.tasks.maximum == TaskTracker Service Property. Applies via mapred-site.xml at each TT.
mapred.child.java.opts == Per-Job Overridable Property. Applies via mapred-site.xml at each client, or via code (JobConf, Job, etc.). On Thu, Nov 1, 2012 at 3:53 AM, anil gupta <anilgupt...@gmail.com> wrote: > Hi Andy, > > This property is related to MR so it has got nothing to do with NN. You need > to put it on each TT. > > HTH, > Anil > > On Wed, Oct 31, 2012 at 2:05 PM, Kartashov, Andy <andy.kartas...@mpac.ca> > wrote: >> >> Guys, >> >> Do you set the above property once on the master NN in in mapred-site.xml >> or on each DN/TTs. >> >> Similarly, what about property: mapred.child.java.opts. Once on NN or each >> and every DN/TaskTrackers? >> NOTICE: This e-mail message and any attachments are confidential, subject >> to copyright and may be privileged. Any unauthorized use, copying or >> disclosure is prohibited. If you are not the intended recipient, please >> delete and contact the sender immediately. Please consider the environment >> before printing this e-mail. AVIS : le présent courriel et toute pièce >> jointe qui l'accompagne sont confidentiels, protégés par le droit d'auteur >> et peuvent être couverts par le secret professionnel. Toute utilisation, >> copie ou divulgation non autorisée est interdite. Si vous n'êtes pas le >> destinataire prévu de ce courriel, supprimez-le et contactez immédiatement >> l'expéditeur. Veuillez penser à l'environnement avant d'imprimer le présent >> courriel > > > > > -- > Thanks & Regards, > Anil Gupta -- Harsh J