Re: Hadoop Metrics

2011-11-23 Thread Paolo Rodeghiero
Hi Ravi, thanks for your reply. I wrote also in dev list, because I saw your reply too late. Right now I'm collecting my metrics using metrics2, and it works fine. I'm using the 0.20.203 release with no added patches. I own a copy of the Tom White's book, and I read most of it, as well as all

Re: How is network distance for nodes calculated

2011-11-23 Thread Steve Loughran
On 22/11/11 21:04, Edmon Begoli wrote: I am reading Hadoop Definitive Guide 2nd Edition and I am struggling to figure out the exact Hadoop's formula for network distance calculation (page 64/65). (I have my guesses, but I would like to know the exact formula) It's implemented in

how to manually fail a task that ran on a failed tasktracker

2011-11-23 Thread Wojciech Biela
Hi I'm in a need to manually fail a task (tip - TaskInProgress), probably via failing its task attempts, whose tasktracker is suddenly not available I want to do this from the FairScheduler.update() (my own scheduler extending FairScheduler and its update() method). The problem is when I just do,