openstack team mailing list archive

[Chris Behrens <cbehrens@xxxxxxxxxxxx>]

There's only 1 rpc call unless you're running cactus or something.  All schedulers have a loop...not API.

min-count is unfortunately special cased right now to be a single call vs cast, though.  I was going to fix that real soon.  Problem is scheduler creating the DB records vs API in this case.  I can expand on this when I'm not replying from a phone. :)

There's some other things that would be nice to do here with the API but the call can change to a cast with no API behavior change (except for speeding up the response :)

- Chris

On Jun 27, 2012, at 12:53 PM, Devin Carlen <devin@xxxxxxxxxxxxx> wrote:

> We filed a blueprint for this yesterday:
> 
> https://blueprints.launchpad.net/nova/+spec/launch-instances-async
> 
> "Currently if a user attempts to create a lot of instances with a single API call (using min_count) the request will hang for a long time while all RPC calls are completed. For a large number of instances this can take a very long time. The API should return immediately and asynchronously make RPC calls."
> 
> We are looking for creative ways to work around this problem, but in the meantime I'd like to hear from folks on what they think the preferred solution would be.
> 
> 
> Devin
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