Received: from maia.hub.org (maia-5.hub.org [200.46.204.29]) by mail.postgresql.org (Postfix) with ESMTP id ED2A41337B4C for ; Sun, 10 Oct 2010 12:29:57 -0300 (ADT) Received: from mail.postgresql.org ([200.46.204.86]) by maia.hub.org (mx1.hub.org [200.46.204.29]) (amavisd-maia, port 10024) with ESMTP id 87180-01 for ; Sun, 10 Oct 2010 15:29:49 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from hrndva-omtalb.mail.rr.com (hrndva-omtalb.mail.rr.com [71.74.56.124]) by mail.postgresql.org (Postfix) with ESMTP id 782821337B48 for ; Sun, 10 Oct 2010 12:29:49 -0300 (ADT) X-Authority-Analysis: v=1.1 cv=QISHQ+x4xS+apxgDHgAvNvlUjyrXCzYsHvuXcbPYiKg= c=1 sm=0 a=uLnYnW5vPakA:10 a=RAii6je2cdnAH6ATCOpc6g==:17 a=_Ixf_7qHAAAA:8 a=7nLAeaaVB8gglJ33k3IA:9 a=12KxhISqLDxH2Zad5tbPQMq2O4gA:4 a=wPNLvfGTeEIA:10 a=ryAo9hy1-OkA:10 a=6vsjEBoLwlAA:10 a=0tfO7MgyNwYA:10 a=fVcfVH1IUqFWlEFJtDkA:9 a=lXyZllZXlEMkq4YYf9QA:7 a=KrXDAyY3Y9qMfxlBj9yugvnCOEcA:4 a=RAii6je2cdnAH6ATCOpc6g==:117 X-Cloudmark-Score: 0 X-Originating-IP: 74.73.87.196 Received: from [74.73.87.196] ([74.73.87.196:50460] helo=[192.168.1.103]) by hrndva-oedge04.mail.rr.com (envelope-from ) (ecelerity 2.2.3.46 r()) with ESMTP id F2/46-11377-CEBD1BC4; Sun, 10 Oct 2010 15:29:48 +0000 Message-ID: <4CB1DBED.70607@vmsinfo.com> Date: Sun, 10 Oct 2010 11:29:49 -0400 From: Mladen Gogala User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.2.9) Gecko/20100915 Lightning/1.0b2 Thunderbird/3.1.4 MIME-Version: 1.0 To: pgsql-performance@postgresql.org Subject: Re: large dataset with write vs read clients References: <4CAE3FDB.1040909@2ndquadrant.com> <87ocb3yu10.fsf@mid.deneb.enyo.de> <4CB0E006.8010905@vmsinfo.com> <871v7y2rwi.fsf@mid.deneb.enyo.de> In-Reply-To: <871v7y2rwi.fsf@mid.deneb.enyo.de> Content-Type: multipart/alternative; boundary="------------080601070905070403020708" X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=-1.899 tagged_above=-10 required=5 tests=BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001 X-Spam-Level: X-Archive-Number: 201010/95 X-Sequence-Number: 40514 This is a multi-part message in MIME format. --------------080601070905070403020708 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit On 10/10/2010 7:45 AM, Florian Weimer wrote: > Some people use RDBMSs mostly for the*M* part, to get a consistent > administration experience across multiple applications. And even with > asynchronous commits, PostgreSQL will maintain a consistent state of > the database. Both Postgres and Oracle have that option and both databases will maintain the consistent state, but both databases will allow the loss of data in case of system crash. Strictly speaking, that does break the "D" in ACID. -- Mladen Gogala Sr. Oracle DBA 1500 Broadway New York, NY 10036 (212) 329-5251 www.vmsinfo.com --------------080601070905070403020708 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit On 10/10/2010 7:45 AM, Florian Weimer wrote:
Some people use RDBMSs mostly for the *M* part, to get a consistent
administration experience across multiple applications.  And even with
asynchronous commits, PostgreSQL will maintain a consistent state of
the database.

Both Postgres and Oracle have that option and both databases will maintain the consistent state, but both databases will allow the loss of data in case of system crash.  Strictly speaking, that does break the "D" in  ACID.

-- 
Mladen Gogala 
Sr. Oracle DBA
1500 Broadway
New York, NY 10036
(212) 329-5251
www.vmsinfo.com 
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