Yes, that additional piece of work was basically my concern. It’s a very mild 
concern, though, and I’m in favour of implementing SDF as a source.

Best,
Aljoscha

> On 11. May 2017, at 01:00, Eugene Kirpichov <kirpic...@google.com.INVALID> 
> wrote:
> 
> Hi,
> 
> Aljoscha - can you clarify your concern?
> 
> Basically, previously the plan was:
> 1. Wait for runners to fully support SDF (hard)
> 2. Implement existing sources as SDF
> 3. Implement new APIs
> 
> and now it's:
> 0. Implement adapter (easy)
> 1. Implement existing sources as SDF
> 2. Wait for runners to have basic support of SDF (medium-hard)
> 3. Implement new APIs
> 4. As individual runners start fully supporting SDF, these sources and APIs
> perform better.
> 
> The only piece of work that exists in the new plan but not in the old plan
> is step 0 implement adapter. Other than that, new plan is a reordering of
> the old plan, where the final state is the same, but it gets delivered more
> incrementally and major pieces of it get delivered much earlier.
> 
> JB - I believe this should answer your question too?
> 
> On Tue, May 2, 2017 at 12:18 PM Jean-Baptiste Onofré <j...@nanthrax.net>
> wrote:
> 
>> +1
>> 
>> I just have a little question: are we blocked to move forward for the
>> support in
>>  the runners or it's just a question of focus ?
>> 
>> I think we could focus on this after the first stable release.
>> 
>> Thought ?
>> 
>> Regards
>> JB
>> 
>> On 05/01/2017 07:22 AM, Eugene Kirpichov wrote:
>>> Hey all,
>>> 
>>> TL;DR: Development of SDF ecosystem (transitioning existing connectors to
>>> SDF, building libraries, battle-testing the API) is currently blocked on
>>> having SDF supported at full parity with Source API in all Beam runners,
>>> which will take a long time.
>>> 
>>> But we can unblock all this work and start doing it very soon, by
>> running a
>>> special case of SDF on top of the Source API.
>>> 
>>> I think this is very exciting. Please comment on the following short
>>> proposal!
>>> 
>>> https://s.apache.org/sdf-via-source
>>> 
>>> After getting some consensus on the doc and in this thread, I will start
>>> filing a network of JIRAs and follow up with next steps.
>>> 
>> 
>> --
>> Jean-Baptiste Onofré
>> jbono...@apache.org
>> http://blog.nanthrax.net
>> Talend - http://www.talend.com
>> 

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