Re: [HACKERS] GSoC on WAL-logging hash indexes

From: Jeff Janes <jeff(dot)janes(at)gmail(dot)com>
To: tankimtran(at)gmail(dot)com
Cc: Robert Haas <robertmhaas(at)gmail(dot)com>, Greg Stark <stark(at)mit(dot)edu>, pgsql-advocacy <pgsql-advocacy(at)postgresql(dot)org>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: [HACKERS] GSoC on WAL-logging hash indexes
Date: 2014-03-05 20:19:27
Message-ID: CAMkU=1wpCy2ow4VXQ3f_q5eUaNzXWj2E5O2O-hh-EVfZgdD2wg@mail.gmail.com
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On Mon, Mar 3, 2014 at 8:12 AM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:

>
> Unfortunately, I don't believe that it's possible to do this easily
> today because of the way bucket splits are handled. I wrote about
> this previously here, with an idea for solving the problem:
>
>
> http://www.postgresql.org/message-id/CA+TgmoZyMoJSrFxHXQ06G8jhjXQcsKvDiHB_8z_7nc7hj7iHYQ@mail.gmail.com
>
> Sadly, no one responded. :-(
>

On Mon, Mar 3, 2014 at 9:39 AM, Tan Tran <tankimtran(at)gmail(dot)com> wrote:

> Thanks for alerting me to your previous idea. While I don't know enough
> about Postgresql internals to judge its merits yet, I'll write some
> pseudocode based on it in my proposal; and I'll relegate it to a "reach"
> proposal alongside a more straightforward one.
>
> Tan
>
>
Hi Tan,

I'm not familiar with the inner workings of the GSoC, but I don't know if
this can be relegated to a "stretch" goal. WAL logging is an all or
nothing thing. I think that, to be applied to the codebase (which I assume
is the goal of GSoC), all actions need to be implemented. That is probably
why this has remained open so long: there is no incremental way to get the
code written. (But I would like to see it get done, I don't want to
discourage that.)

Cheers,

Jeff

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