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Posted to dev@twill.apache.org by Henry Saputra <he...@gmail.com> on 2014/06/05 18:38:25 UTC

Can Application use Twill without ZK?

HI Guys,

Just curious, looks like ZK is used for HA when client is down so
would it be possible to use Twill to build YARN application without
having ZK installed in the client node?

Thanks,

Henry

Re: Can Application use Twill without ZK?

Posted by Henry Saputra <he...@gmail.com>.

Not really issue for us, but we just do not have ZK currently
installed in our provisioned cluster nodes.

- Henry

On Thu, Jun 5, 2014 at 9:57 AM, Andreas Neumann <an...@apache.org> wrote:
> Henry,
>
> ZooKeeper is not required to run in the client node, all you need there is
> a ZK client. It needs to be installed in the cluster for many other
> purposes than HA, the Twill AM and the containers use it to communicate.
>
> Is having the ZK client library an issue in your scenario?
>
> -Andreas.
>
>
>
> On Thu, Jun 5, 2014 at 4:38 PM, Henry Saputra <he...@gmail.com>
> wrote:
>
>> HI Guys,
>>
>> Just curious, looks like ZK is used for HA when client is down so
>> would it be possible to use Twill to build YARN application without
>> having ZK installed in the client node?
>>
>> Thanks,
>>
>> Henry
>>

Re: Can Application use Twill without ZK?

Posted by Andreas Neumann <an...@apache.org>.

Henry,

ZooKeeper is not required to run in the client node, all you need there is
a ZK client. It needs to be installed in the cluster for many other
purposes than HA, the Twill AM and the containers use it to communicate.

Is having the ZK client library an issue in your scenario?

-Andreas.

On Thu, Jun 5, 2014 at 4:38 PM, Henry Saputra <he...@gmail.com>
wrote:

> HI Guys,
>
> Just curious, looks like ZK is used for HA when client is down so
> would it be possible to use Twill to build YARN application without
> having ZK installed in the client node?
>
> Thanks,
>
> Henry
>