Re: The plan for FDW-based sharding

On Wed, Feb 24, 2016 at 12:35:15PM +0300, Oleg Bartunov wrote:
>     I have nothing against particular FDW advances. However, it's unclear for
>     me that FDW should be the only sharding approach.
>     It's unproven that FDW can do work that Postgres XC/XL does. With FDW we
>     can have some low-hanging fruits. That's good.
>     But it's unclear we can have high-hanging fruits (like data redistribution)
>     with FDW approach. And if we can it's unclear that it would be easier than
>     with other approaches.
>     Just let's don't call this community chosen plan for implementing sharding.
>     Until we have full picture we can't select one way and reject others.
> 
> 
> I already several times pointed, that we need XTM to be able to continue
> development in different directions, since there is no clear winner.  Moreover,
> I think there is no fits-all  solution and while I agree we need one built-in
> in the core, other approaches should have ability to exists without patching.

Yep.  I think much of what we eventually add to core will be either
copied from an existing soltion, which then doesn't need to be
maintained anymore, or used by existing solutions.

--  Bruce Momjian  <bruce@momjian.us>        http://momjian.us EnterpriseDB
http://enterprisedb.com

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