Hi, Following might help.
Less(rather minimal) jvm heap size for NN. Create many small files with increased replication factor(more information for NN to store in memory) keep only one name node directory for storing meta data(less diskspace will trigger the process E.g mount a tiny disk and point that as NN directory in the config) Kill the NN process Pramod N <http://atmachinelearner.blogspot.in> Bruce Wayne of web @machinelearner <https://twitter.com/machinelearner> -- On Wed, Jun 19, 2013 at 1:05 PM, Pavan Kumar Polineni < smartsunny...@gmail.com> wrote: > hi Nitin, > > That's true mate. Finally your understand me. And if you have some > scenarios also accepted :). > > Thanks In Advance. > > > On Wed, Jun 19, 2013 at 1:01 PM, Nitin Pawar <nitinpawar...@gmail.com>wrote: > >> If I understand correctly, >> >> what you want to do is crash the namenode manually and recover it using >> secondary namenode? >> and you want to know both how to crash the namenode as well how to >> recover it >> >> Is that correct ? >> >> >> On Wed, Jun 19, 2013 at 12:34 PM, Pavan Kumar Polineni < >> smartsunny...@gmail.com> wrote: >> >>> Hi Manoj, >>> >>> If we power of the Host then the secondary name node also goes down. I >>> want to simulate the name node failure and what to do some recovery. Every >>> thing is part of the testing the name node recovery. >>> >>> >>> >>> On Wed, Jun 19, 2013 at 12:32 PM, Manoj S <manoj.sundara...@gmail.com>wrote: >>> >>>> You can stop the Namenode daemon or even power the host off :) >>>> >>>> >>>> On Wed, Jun 19, 2013 at 12:27 PM, Pavan Kumar Polineni < >>>> smartsunny...@gmail.com> wrote: >>>> >>>>> I am using Hadoop-1. I dont want HA. >>>>> >>>>> >>>>> On Wed, Jun 19, 2013 at 12:20 PM, Azuryy Yu <azury...@gmail.com>wrote: >>>>> >>>>>> hey Pavan, >>>>>> Hadoop-2.* has HDFS HA, which hadoop version are you using? >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> On Wed, Jun 19, 2013 at 2:46 PM, Pavan Kumar Polineni < >>>>>> smartsunny...@gmail.com> wrote: >>>>>> >>>>>>> I am checking for Cloudera only. But no HA? just we have single Name >>>>>>> node. >>>>>>> For testing purposes and preventing actions. Preparing expected >>>>>>> scenarios and solutions for them. >>>>>>> >>>>>>> >>>>>>> On Wed, Jun 19, 2013 at 12:14 PM, Nitin Pawar < >>>>>>> nitinpawar...@gmail.com> wrote: >>>>>>> >>>>>>>> are you testing it for HA? >>>>>>>> which version of hadoop are you using? >>>>>>>> >>>>>>>> can you explain your test scenario in detail >>>>>>>> >>>>>>>> >>>>>>>> On Wed, Jun 19, 2013 at 12:08 PM, Pavan Kumar Polineni < >>>>>>>> smartsunny...@gmail.com> wrote: >>>>>>>> >>>>>>>>> For Testing The Name Node Crashes and failures. For Single Point >>>>>>>>> of Failure >>>>>>>>> >>>>>>>>> -- >>>>>>>>> Pavan Kumar Polineni >>>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> -- >>>>>>>> Nitin Pawar >>>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> -- >>>>>>> Pavan Kumar Polineni >>>>>>> >>>>>> >>>>>> >>>>> >>>>> >>>>> -- >>>>> Pavan Kumar Polineni >>>>> >>>> >>>> >>> >>> >>> -- >>> Pavan Kumar Polineni >>> >> >> >> >> -- >> Nitin Pawar >> > > > > -- > Pavan Kumar Polineni >
