Nothing wrong in copying it - except it would come with a bunch of redundant information (extra retained edit logs already merged into one of the recent fsimages).
On Tue, Feb 4, 2014 at 12:07 PM, Ivan Tretyakov <itretya...@griddynamics.com> wrote: > Thank you Harsh! > But I would like to know if just copying NN data directory (dfs.name.dir, > dfs.namenode.name.dir) is appropriate or not? > > > On Tue, Feb 4, 2014 at 6:00 AM, Harsh J <ha...@cloudera.com> wrote: >> >> Hi, >> >> You'll ideally just need the latest >> fsimage file, which includes the whole check pointed namespace, so >> "hdfs dfsadmin -fetch" is appropriate. >> >> On Tue, Feb 4, 2014 at 3:02 AM, Ivan Tretyakov >> <itretya...@griddynamics.com> wrote: >> > Does anybody can comment 'copying NN metadata directory' vs 'hdfs >> > dfsadmin >> > -fetch', using NN HA configuration? >> > >> > >> > On Fri, Jan 31, 2014 at 8:26 PM, Ivan Tretyakov >> > <itretya...@griddynamics.com> wrote: >> >> >> >> Hi! >> >> >> >> We are using following version of Hadoop software: 2.0.0-cdh4.1.1. >> >> >> >> HDFS HA configuration is applied. >> >> >> >> I would like to ask if there are any difference or possible side >> >> effects >> >> of backing up namenode data directory. >> >> >> >> It is ok to just copy NN data directory from active NN to another host, >> >> what about standby NN? >> >> Or it may NN metadate can be in inconsistent state? >> >> Is there any advantages of using "hdfs dfsadmin -fetch <file>" command? >> >> >> >> -- >> >> Best Regards >> >> Ivan Tretyakov >> >> >> >> Deployment Engineer >> >> Grid Dynamics >> >> +7 812 640 38 76 >> >> Skype: ivan.v.tretyakov >> >> www.griddynamics.com >> >> itretya...@griddynamics.com >> > >> > >> > >> > >> > -- >> > Best Regards >> > Ivan Tretyakov >> > >> > Deployment Engineer >> > Grid Dynamics >> > +7 812 640 38 76 >> > Skype: ivan.v.tretyakov >> > www.griddynamics.com >> > itretya...@griddynamics.com >> >> >> >> -- >> Harsh J > > > > > -- > Best Regards > Ivan Tretyakov > > Deployment Engineer > Grid Dynamics > +7 812 640 38 76 > Skype: ivan.v.tretyakov > www.griddynamics.com > itretya...@griddynamics.com -- Harsh J
