Received: from maia.hub.org (maia-2.hub.org [200.46.204.251]) by mail.postgresql.org (Postfix) with ESMTP id 58CC51337B56 for ; Thu, 30 Dec 2010 21:15:26 -0400 (AST) Received: from mail.postgresql.org ([200.46.204.86]) by maia.hub.org (mx1.hub.org [200.46.204.251]) (amavisd-maia, port 10024) with ESMTP id 17924-01 for ; Fri, 31 Dec 2010 01:15:19 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from outmail149101.authsmtp.com (outmail149101.authsmtp.com [62.13.149.101]) by mail.postgresql.org (Postfix) with ESMTP id DF8F1133798E for ; Thu, 30 Dec 2010 21:15:18 -0400 (AST) Received: from mail-c194.authsmtp.com (mail-c194.authsmtp.com [62.13.128.121]) by punt5.authsmtp.com (8.14.2/8.14.2/Kp) with ESMTP id oBV1FEDT012279; Fri, 31 Dec 2010 01:15:14 GMT Received: from [192.168.0.2] ([81.5.146.37]) (authenticated bits=0) by mail.authsmtp.com (8.14.2/8.14.2) with ESMTP id oBV1FCvx074723; Fri, 31 Dec 2010 01:15:12 GMT Subject: Re: Sync Rep Design From: Simon Riggs To: Robert Haas Cc: Stefan Kaltenbrunner , pgsql-hackers@postgresql.org In-Reply-To: References: <1293729972.1892.23804.camel@ebony> <4D1CC47E.7050207@kaltenbrunner.cc> <1293735853.1892.24886.camel@ebony> <4D1CEEAF.8050209@kaltenbrunner.cc> Content-Type: text/plain; charset="UTF-8" Date: Fri, 31 Dec 2010 01:15:10 +0000 Message-ID: <1293758110.1892.29072.camel@ebony> Mime-Version: 1.0 X-Mailer: Evolution 2.28.3 Content-Transfer-Encoding: 7bit X-Server-Quench: 6ae10d2c-147b-11e0-80b9-0022640b883e X-AuthReport-Spam: If SPAM / abuse - report it at: http://www.authsmtp.com/abuse X-AuthRoute: OCdxZQATClZOTQEd DAteCiN5VAwpPBRK HVkIKg5MJUcNSQVJ NksadRtFawRbaVxS HGQLWlREUFx7WGZ/ aggfZQRDZ1RPWwN0 U09WR1pVCwUmXm5n B2htFFFycAFBen0+ YEZmXj5dDRF7dRJ/ EVNVEWpUeGZhPWAC WEAKfh5UcAFIeBtF OFh3VyZDAzANdhEY NiQQEgoKCH1kOSJe CjsANRo+TF0KEThU X-Authentic-SMTP: 61633235383639.1015:706 X-AuthFastPath: 0 (Was 255) X-AuthVirus-Status: No virus detected - but ensure you scan with your own anti-virus system. X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=-1.9 tagged_above=-5 required=5 tests=BAYES_00=-1.9, RCVD_IN_DNSWL_NONE=-0.0001 X-Spam-Level: X-Archive-Number: 201012/2516 X-Sequence-Number: 177778 On Thu, 2010-12-30 at 16:47 -0500, Robert Haas wrote: > On Thu, Dec 30, 2010 at 3:42 PM, Stefan Kaltenbrunner > wrote: > >> synchronous replication for high performance applications. This feature > >> is unique to PostgreSQL. > > > > that seems to be a bit too much marketing for a reference level document > > +1. I've removed the "This feature is unique to PostgreSQL", which I agree belongs in a press release, not docs. The explanation of a use case that would benefit from the feature seems valid and I've left that in. PostgreSQL docs are more technical and precise than any other DBMS, even DB2. Having read everybody else's docs, I'm inclined to say it would be easier to explain if I left out the details, as they do. You won't find a detailed explanation of commit guarantees in MySQL docs, for example. -- Simon Riggs http://www.2ndQuadrant.com/books/ PostgreSQL Development, 24x7 Support, Training and Services