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Re: Final status of projects?

From: "Florian G(dot) Pflug" <fgp(at)phlo(dot)org>
To: Simon Riggs <simon(at)2ndquadrant(dot)com>
Cc: Josh Berkus <josh(at)agliodbs(dot)com>, pgsql-students(at)postgresql(dot)org
Subject: Re: Final status of projects?
Date: 2007-08-29 22:13:58
Message-ID: 46D5EFA6.4020406@phlo.org (view raw or flat)
Thread:
Lists: pgsql-students
Simon Riggs wrote:
> On Wed, 2007-08-29 at 19:51 +0200, Florian G. Pflug wrote:
>> Josh Berkus wrote:
>>> Students & Mentors,
>>>
>>> I'd like to know how all of your projects came out.  I know about a few of 
>>> them, but not a lot of the others:
>>>
>>> Florian -- still working on HOT Standby
>> PITR standby you mean, I think ;-)
> 
> Hmmm, well if we say Hot Standby rather than HOT Standby. We need to
> differentiate what we have now ("warm") with what we hope to achieve
> ("hot"). (I do have to say I've been amazed at how many people seem to
> have confused what Florian is working on).
When I read HOT, I immediatly thought "Heap-Only-Tuples", because I've
been reading that patch, to see if we can reuse some ideas for
lazy xid assignment. So I didn't even consider that HOT could mean hot ;-)

>> I have completed an early prototype. Since the pencils-down dealine of
>> GSoC has already passed (It was 20th August), I'm currently working on
>> a patch to lazily assign XIDs. This is a generalization of a part of
>> my GSoC work, since readonly queries on PITR standby instances need to
>> be able to run without a real XID too (We cannot generate XIDs on the
>> standby, they might conflict with those generated on the master).
>>
>> If this patch should go in, it'll remove one obstacle from the way
>> to readonly-queries on PITR slaves, and make the rest of the patch
>> a great deal less intrusive.
> 
> I'm very happy with what has been achieved, but we really should regard
> this as research and not committable code. In this case, the idea of
> "pencils down" doesn't make any sense.
Full Ack. The fact that what I do now won't be part of the "official SoC 
outcome" anyway just made it easier for me to justify my little "lazy
XID assignment" detour.

greetings, Florian Pflug


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