| From: | Jeff Davis <pgsql(at)j-davis(dot)com> |
|---|---|
| To: | Kevin Grittner <Kevin(dot)Grittner(at)wicourts(dot)gov> |
| Cc: | pgsql-hackers(at)postgresql(dot)org, Dan Ports <drkp(at)csail(dot)mit(dot)edu>, Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com> |
| Subject: | Re: SSI and 2PC |
| Date: | 2011-01-11 17:21:07 |
| Message-ID: | 1294766467.18031.3672.camel@jdavis |
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| Lists: | pgsql-hackers |
On Mon, 2011-01-10 at 11:50 -0600, Kevin Grittner wrote:
> I'm trying not to panic here, but I haven't looked at 2PC before
> yesterday and am just dipping into the code to support it, and time
> is short. Can anyone give me a pointer to anything I should read
> before I dig through the 2PC code, which might accelerate this?
I don't see much about 2PC outside of twophase.c.
Regarding the original post, I agree that we should have two
phase-commit support for SSI. We opted not to support it for
notifications, but there was a fairly reasonable argument why users
wouldn't value the combination of 2PC and NOTIFY.
I don't expect this to be a huge roadblock for the feature though. It
seems fairly contained. I haven't read the 2PC code either, but I don't
expect that you'll need to change the rest of your algorithm just to
support it.
Regards,
Jeff Davis
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