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From Ivan Tretyakov <itretya...@griddynamics.com>
Subject Re: Backup NameNode metadata in HA configuration
Date Tue, 04 Feb 2014 06:37:36 GMT
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 <harsh@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
> <itretyakov@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
> > <itretyakov@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
> >> itretyakov@griddynamics.com
> >
> >
> >
> >
> > --
> > Best Regards
> > Ivan Tretyakov
> >
> > Deployment Engineer
> > Grid Dynamics
> > +7 812 640 38 76
> > Skype: ivan.v.tretyakov
> > www.griddynamics.com
> > itretyakov@griddynamics.com
>
>
>
> --
> Harsh J
>



-- 
Best Regards
Ivan Tretyakov

Deployment Engineer
Grid Dynamics
+7 812 640 38 76
Skype: ivan.v.tretyakov
www.griddynamics.com
itretyakov@griddynamics.com

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