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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 04:59:45 GMT
SNN(secondary name node),sorry for typo.
On Mar 24, 2013 12:59 PM, "Azuryy Yu" <azuryyyu@gmail.com> wrote:

> 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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