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 mbo...@redhat.com 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

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 mbo...@redhat.com 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: