[Engine-devel] Polling vs Pushing engine events

[Sven Kieske]

Hi,

thanks for your fast replies.

We are aware that we can poll this via API, but we don't want to poll
it, as it's not a good solution, from a design point of view.

We will maybe write a little python script, which runs on engine-node
via SDK which polls the API and let this script push the information
forward to external systems over network when a certain event occurs.

Something similar to this in oVirt would be useful.
You don't want to poll every second, or more often, for simple
events like "is the vm already up?".

This just creates unnecessary network traffic and load on the polling
system.

With this solution we can at least avoid the network traffic.

This is, why I asked for a pushing logic.

Maybe it's now more clear?

But thanks again for your help :-)

Am 17.12.2013 09:24, schrieb Liran Zelkha:
> Note that you can usually get all the information you want using 1 API
> call, which should still scale.
> For instance, /ovirt-engine/api/vms will give you a list of all VMs and
> their statuses, so you can just run an XPath and get the status of all of
> them.

-- 
Mit freundlichen Grüßen / Regards

Sven Kieske

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