[openstack-dev] [nova] Distributed Database

Matt Riedemann mriedem at linux.vnet.ibm.com
Fri Apr 29 12:38:17 UTC 2016

On 4/28/2016 8:54 PM, Edward Leafe wrote:
> On Apr 28, 2016, at 5:35 PM, Clint Byrum <clint at fewbar.com> wrote:
>> - Vitess [2] is a proven technology that serves _every_ request to
>>  Youtube, and provides a familiar SQL interface with sharding built
>>  in. Shard by project ID and you can just use regular index semantics.
>>  Or if that's unacceptable (IMO it's fine since Vitess provides enough
>>  redundancy that one shard has plenty of failure-domain reliability),
>>  you can also use the built-in Hadoop support they have for doing
>>  exactly what has been described (merge sorting the result of cross-cell
>>  queries).
> Thanks for that reference. I hadn’t heard of Vitess before, but it looks pretty capable.
>> So, I have to ask, why is cells v2 being pushed so hard without looking
>> outside OpenStack for actual existing solutions, which, IMO, are
>> _numerous_, battle hardened, and simpler than cells.
> Cells are a great concept, but of course the devil is in the implementation. So if having cells is an advantage (and that is a separate discussion that already seems settled), then we should focus on the best way to implement it for (short-term) efficiency and (long-term) maintainability.
> -- Ed Leafe
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So, we're all here in person this week (with 1 day left). The Nova team 
has a meetup session all day (Salon A in the Hilton). Clint/Ed, can you 
guys show up to that and bring these issues up in person so we can 
actually talk through this? Preferably in the morning since people are 
starting to leave after lunch.



Matt Riedemann

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