oh, got it. you are a good guy.
--Send from my Sony mobile.
On Apr 7, 2013 10:11 PM, "Harsh J" wrote:
> StandbyNameNode is the term we use to refer to a NameNode in HA that
> is currently not the active one (i.e. its state is 'Standby'). Its not
> a special type of daemon (i.e. it just runs the
StandbyNameNode is the term we use to refer to a NameNode in HA that
is currently not the active one (i.e. its state is 'Standby'). Its not
a special type of daemon (i.e. it just runs the NameNode service),
just a naming convention.
On Sun, Apr 7, 2013 at 7:31 PM, Azuryy Yu wrote:
> I am confused
SNN=secondary name node in my last mail.
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On Apr 7, 2013 10:01 PM, "Azuryy Yu" wrote:
> I am confused. Hadoopv2 has NN SNN DN JN(journal node), so whats
> Standby Namenode?
>
> --Send from my Sony mobile.
> On Apr 7, 2013 9:03 PM, "Harsh J" wrote:
>
>> BackupNameNode
I am confused. Hadoopv2 has NN SNN DN JN(journal node), so whats
Standby Namenode?
--Send from my Sony mobile.
On Apr 7, 2013 9:03 PM, "Harsh J" wrote:
> BackupNameNode is not present in the maintenance 1.x releases, it is a
> feature added to a higher version; you can try it out in 2.x today if
BackupNameNode is not present in the maintenance 1.x releases, it is a
feature added to a higher version; you can try it out in 2.x today if
you wish to.
On Sun, Apr 7, 2013 at 3:12 PM, Azuryy Yu wrote:
> Hi Harsh,
> Do you mean BackupNameNode is Secondary NameNode in Hadoop1.x?
>
>
> On Sun, Apr
Hi Harsh,
Do you mean BackupNameNode is Secondary NameNode in Hadoop1.x?
On Sun, Apr 7, 2013 at 4:05 PM, Harsh J wrote:
> Yes, it need not keep an edits (transactions) stream locally cause
> those are passed synchronously to the BackupNameNode, which persists
> it on its behalf.
>
> On Sun, Apr
Thanks for answering my question, Harsh.
regards,
Lin
On Sun, Apr 7, 2013 at 4:05 PM, Harsh J wrote:
> Yes, it need not keep an edits (transactions) stream locally cause
> those are passed synchronously to the BackupNameNode, which persists
> it on its behalf.
>
> On Sun, Apr 7, 2013 at 1:21 PM
Yes, it need not keep an edits (transactions) stream locally cause
those are passed synchronously to the BackupNameNode, which persists
it on its behalf.
On Sun, Apr 7, 2013 at 1:21 PM, Lin Ma wrote:
> Thanks Harsh,
>
> For your comments, "What it means is that the NameNode need not store
> anyth
Thanks Harsh,
For your comments, "What it means is that the NameNode need not store
anything locally", you mean Primary Name Node do not need to store
checkpoint/journal locally, and only need to keep memory image up-to-date
for edits?
regards,
Lin
On Sun, Apr 7, 2013 at 3:31 PM, Harsh J wrote:
Hi Lin,
My reply inline.
On Sun, Apr 7, 2013 at 12:36 PM, Lin Ma wrote:
> Hi guys,
>
> I am reading from this paper to learn about backup nodes
> (http://www.storageconference.org/2010/Papers/MSST/Shvachko.pdf),
>
> It is mentioned, "It contains all file system metadata information except
> for
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