[openstack-dev] [heat] Convergence - persistence desired and observed state

Qiming Teng tengqim at linux.vnet.ibm.com
Wed Sep 17 13:22:09 UTC 2014


On Wed, Sep 17, 2014 at 12:27:34PM +0000, Gurjar, Unmesh wrote:
> Hi All,
> 
> The convergence blueprint (https://review.openstack.org/#/c/95907/) introduces two new database tables (resource_observed and resource_properties_observed ) for storing the observed state of a resource (currently under review: https://review.openstack.org/#/c/109012/).
> 
> However, it can be simplified by storing the desired and observed state of a resource in the resource table itself (two columns in the form of a blob storing a JSON). Please let me know your concerns or suggestions about this approach.
> 
> Thanks,
> Unmesh G.

It doesn't sounds like a good idea to me unless we have some plans to
handle potential concurrency and compatibility issues.

Regards,
Qiming




More information about the OpenStack-dev mailing list