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From Jean-Daniel Cryans <jdcry...@apache.org>
Subject Re: State of high availability in Hadoop 0.20.1
Date Thu, 24 Jun 2010 17:15:25 GMT
The Backup Namenode will be in 0.21 but it's not a complete NN HA
solution (far from that):

https://issues.apache.org/jira/browse/HADOOP-4539

Dhruba at Facebook has a AvatarNode for 0.20:

https://issues.apache.org/jira/browse/HDFS-976

And the umbrella issue for NN availability is:

https://issues.apache.org/jira/browse/HDFS-1064

J-D

On Thu, Jun 24, 2010 at 10:10 AM, Stas Oskin <stas.oskin@gmail.com> wrote:
> Hi.
>
> The check-point node is expected to be included in 0.21?
>
> Regards.
>
> On Thu, Jun 24, 2010 at 7:47 PM, Jean-Daniel Cryans <jdcryans@apache.org>wrote:
>
>> It's the same.
>>
>> J-D
>>
>> On Thu, Jun 24, 2010 at 9:44 AM, Stas Oskin <stas.oskin@gmail.com> wrote:
>> > Just to clarify, I mean the NameNode high availability.
>> >
>> > Regards.
>> >
>> > On Thu, Jun 24, 2010 at 7:43 PM, Stas Oskin <stas.oskin@gmail.com>
>> wrote:
>> >
>> >> Hi.
>> >>
>> >> What is the state of high-availability in Hadoop 0.20.1?
>> >>
>> >> In Hadoop 0.18.3 the only option was doing DBRD, has anything changed in
>> >> 0.20.1?
>> >>
>> >> Regards.
>> >>
>> >
>>
>

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