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Posted to hdfs-user@hadoop.apache.org by Serge Blazhievsky <ha...@gmail.com> on 2013/05/22 02:19:53 UTC
upgrade from primary + secondary NN to active + standby NN
Hi guys,
I am planning to upgrade to HA architecture and I am not sure if metadata
is backward capable.
Are there any problems that anybody is aware of?
Thanks in advance.
Serge
Re: upgrade from primary + secondary NN to active + standby NN
Posted by Harsh J <ha...@cloudera.com>.
FWIW, I've seen through a lot of upgrades from 1.x to 2.x and metadata
issue's never been a part of it. You should be able to safely upgrade and
then to configure HA. Note that you cannot directly upgrade into HA mode
yet, you have to upgrade to a regular 1.x to 2.x, and then as a next step,
enable HA.
Rollbacks are supported as long as you haven't finalized the metadata
upgrade. I hope this covers the "backward capable" metadata question. If
not, please rephrase that point?
On Wed, May 22, 2013 at 5:49 AM, Serge Blazhievsky <ha...@gmail.com>wrote:
> Hi guys,
>
> I am planning to upgrade to HA architecture and I am not sure if metadata
> is backward capable.
>
> Are there any problems that anybody is aware of?
>
> Thanks in advance.
> Serge
>
--
Harsh J
Re: upgrade from primary + secondary NN to active + standby NN
Posted by Harsh J <ha...@cloudera.com>.
FWIW, I've seen through a lot of upgrades from 1.x to 2.x and metadata
issue's never been a part of it. You should be able to safely upgrade and
then to configure HA. Note that you cannot directly upgrade into HA mode
yet, you have to upgrade to a regular 1.x to 2.x, and then as a next step,
enable HA.
Rollbacks are supported as long as you haven't finalized the metadata
upgrade. I hope this covers the "backward capable" metadata question. If
not, please rephrase that point?
On Wed, May 22, 2013 at 5:49 AM, Serge Blazhievsky <ha...@gmail.com>wrote:
> Hi guys,
>
> I am planning to upgrade to HA architecture and I am not sure if metadata
> is backward capable.
>
> Are there any problems that anybody is aware of?
>
> Thanks in advance.
> Serge
>
--
Harsh J
Re: upgrade from primary + secondary NN to active + standby NN
Posted by Harsh J <ha...@cloudera.com>.
FWIW, I've seen through a lot of upgrades from 1.x to 2.x and metadata
issue's never been a part of it. You should be able to safely upgrade and
then to configure HA. Note that you cannot directly upgrade into HA mode
yet, you have to upgrade to a regular 1.x to 2.x, and then as a next step,
enable HA.
Rollbacks are supported as long as you haven't finalized the metadata
upgrade. I hope this covers the "backward capable" metadata question. If
not, please rephrase that point?
On Wed, May 22, 2013 at 5:49 AM, Serge Blazhievsky <ha...@gmail.com>wrote:
> Hi guys,
>
> I am planning to upgrade to HA architecture and I am not sure if metadata
> is backward capable.
>
> Are there any problems that anybody is aware of?
>
> Thanks in advance.
> Serge
>
--
Harsh J
Re: upgrade from primary + secondary NN to active + standby NN
Posted by Harsh J <ha...@cloudera.com>.
FWIW, I've seen through a lot of upgrades from 1.x to 2.x and metadata
issue's never been a part of it. You should be able to safely upgrade and
then to configure HA. Note that you cannot directly upgrade into HA mode
yet, you have to upgrade to a regular 1.x to 2.x, and then as a next step,
enable HA.
Rollbacks are supported as long as you haven't finalized the metadata
upgrade. I hope this covers the "backward capable" metadata question. If
not, please rephrase that point?
On Wed, May 22, 2013 at 5:49 AM, Serge Blazhievsky <ha...@gmail.com>wrote:
> Hi guys,
>
> I am planning to upgrade to HA architecture and I am not sure if metadata
> is backward capable.
>
> Are there any problems that anybody is aware of?
>
> Thanks in advance.
> Serge
>
--
Harsh J