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From Azuryy Yu <azury...@gmail.com>
Subject Re: For a new installation: use the BackupNode or the CheckPointNode?
Date Sun, 24 Mar 2013 04:59:10 GMT
IMO, if you run HA, then SSN is not necessary.
On Mar 24, 2013 12:40 PM, "Harsh J" <harsh@cloudera.com> wrote:

> Yep, this is correct - you only need the SecondaryNameNode in 1.x. In
> 2.x, if you run HA, the standby NameNode role also doubles up
> automatically as the SNN so you don't need to run an extra.
>
> On Sun, Mar 24, 2013 at 6:51 AM, David Parks <davidparks21@yahoo.com>
> wrote:
> > So... the answer is... SecondaryNameNode is what I should be installing
> > here. And the SecondaryNameNode is essentially just an earlier version of
> > the checkpoint node, in terms of functionality. If I understood
> everything
> > correctly. Can you confirm?
> >
> > Thanks,
> > David
> >
> >
> > -----Original Message-----
> > From: Harsh J [mailto:harsh@cloudera.com]
> > Sent: Saturday, March 23, 2013 5:33 PM
> > To: <user@hadoop.apache.org>
> > Cc: davidparks21@yahoo.com
> > Subject: Re: For a new installation: use the BackupNode or the
> > CheckPointNode?
> >
> > Neither CheckpointNode nor BackupNode exists in version 1.x. This was a
> > documentation oversight that should be cleared in the docs now (or by
> next
> > release I think).
> >
> > And on 2.x, neither has been tested for stability and the
> SecondaryNameNode
> > continues to exist and is fully supported (not deprecated).
> >
> > On Sat, Mar 23, 2013 at 12:34 PM, varun kumar <varun.uid@gmail.com>
> wrote:
> >> Hope below link will be useful..
> >>
> >> http://hadoop.apache.org/docs/stable/hdfs_user_guide.html
> >>
> >>
> >> On Sat, Mar 23, 2013 at 12:29 PM, David Parks <davidparks21@yahoo.com>
> >> wrote:
> >>>
> >>> For a new installation of the current stable build (1.1.2 ), is there
> >>> any reason to use the CheckPointNode over the BackupNode?
> >>>
> >>>
> >>>
> >>> It seems that we need to choose one or the other, and from the docs
> >>> it seems like the BackupNode is more efficient in its processes.
> >>
> >>
> >>
> >>
> >> --
> >> Regards,
> >> Varun Kumar.P
> >
> >
> >
> > --
> > Harsh J
> >
>
>
>
> --
> Harsh J
>

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