Re: [openstack-dev] [oslo.db][nova] Use of asynchronous slaves in Nova (was: Deprecating use_slave in Nova)

2015-02-02 Thread Mike Bayer
Matthew Booth wrote: > > Based on my current (and still sketchy) understanding, I think we can > define 3 classes of database node: > > 1. Read/write > 2. Synchronous read-only > 3. Asynchronous read-only > > and 3 code annotations: > > * Writer (must use class 1) > * Reader (prefer class 2

Re: [openstack-dev] [oslo.db][nova] Use of asynchronous slaves in Nova (was: Deprecating use_slave in Nova)

2015-02-02 Thread Matthew Booth
On 30/01/15 19:06, Mike Bayer wrote: > > > Matthew Booth wrote: > >> At some point in the near future, hopefully early in L, we're intending >> to update Nova to use the new database transaction management in >> oslo.db's enginefacade. >> >> Spec: >> http://git.openstack.org/cgit/openstack/oslo