[openstack-dev] [nova][db] Thoughts on making instances.uuid non-nullable?
mriedem at linux.vnet.ibm.com
Mon Mar 10 14:11:13 UTC 2014
On 3/9/2014 9:18 PM, Jay Pipes wrote:
> On Mon, 2014-03-10 at 10:05 +0800, ChangBo Guo wrote:
>> 2014-03-10 4:47 GMT+08:00 Jay Pipes <jaypipes at gmail.com>:
>> > 3. This would make the instances and shadow_instances tables
>> > different schemas, i.e. instances.uuid would be
>> nullable=False in
>> > instances but nullable=True in shadow_instances. Maybe this
>> doesn't matter.
>> No, I don't think this matters much, to be honest. I'm not
>> entirely sure
>> what the long-term purpose of the shadow tables are in Nova --
>> someone could clue me in to whether the plan is to keep them
>> As I know the tables shadow_* are used by command ' nova-manage db
>> archive_deleted_rows' , which moves records with "deleted=True" to
>> table shadow_* . That means these tables are used by other process,
>> So, I think we need other tables to store the old records in your
> Yeah, that's what I understood the shadow tables were used for, I just
> didn't know what the long-term future of these tables was... curious if
> there's been any discussion about that.
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I think Joe Gordon was working on something in the hopes of eventually
killing the shadow tables but I can't remember exactly what that was now.
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