Configuration changes

[Anisha Agarwal <aa...@hexiscyber.com>]

Hi,

I had a question about how configuration changes work?

So, say I have HDFS and Mapreduce installed, and I want to make a config change from the UI.
I stop the service, make the change, save it, and start the service.

At what point do the changes get propagated across the cluster? When we save the changes, does cluster.xml get updated and pushed to each host at that point, or does it happen after we issue the start command?

Thanks,
Anisha

Re: Configuration changes

[Srimanth Gunturi <sr...@hortonworks.com>]

Hi Anisha,
Ambari updates the config files on hosts during component start.
You might have noticed that the stale configs indicator stays till the
service/component is started.
Regards,
Srimanth



On Wed, Apr 23, 2014 at 5:37 PM, Anisha Agarwal <aa...@hexiscyber.com>wrote:

>  Hi,
>
>  I had a question about how configuration changes work?
>
>  So, say I have HDFS and Mapreduce installed, and I want to make a config
> change from the UI.
> I stop the service, make the change, save it, and start the service.
>
>  At what point do the changes get propagated across the cluster? When we
> save the changes, does cluster.xml get updated and pushed to each host at
> that point, or does it happen after we issue the start command?
>
>  Thanks,
> Anisha
>

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