Path: text.usenetserver.com!out02a.usenetserver.com!news.usenetserver.com!in02.usenetserver.com!news.usenetserver.com!postnews.google.com!y71g2000hsa.googlegroups.com!not-for-mail From: hpuxrac Newsgroups: comp.databases.oracle.server Subject: Re: San-Based replication VS DataGuard replication Date: Sat, 4 Oct 2008 12:02:21 -0700 (PDT) Organization: http://groups.google.com Lines: 22 Message-ID: References: <29638136-ed11-405f-84c2-bc07283254d7@k7g2000hsd.googlegroups.com> <1222494010.972896@bubbleator.drizzle.com> <64aee97b-0b2a-4e04-a99c-c4e3e77f1196@t42g2000hsg.googlegroups.com> <1222987500.264251@bubbleator.drizzle.com> NNTP-Posting-Host: 76.243.183.40 Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Trace: posting.google.com 1223146942 9697 127.0.0.1 (4 Oct 2008 19:02:22 GMT) X-Complaints-To: groups-abuse@google.com NNTP-Posting-Date: Sat, 4 Oct 2008 19:02:22 +0000 (UTC) Complaints-To: groups-abuse@google.com Injection-Info: y71g2000hsa.googlegroups.com; posting-host=76.243.183.40; posting-account=_6ry2goAAAB8CmCVzS5u_8_rocyBncPn User-Agent: G2/1.0 X-HTTP-UserAgent: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.0.3) Gecko/2008092417 Firefox/3.0.3,gzip(gfe),gzip(gfe) Xref: usenetserver.com comp.databases.oracle.server:448413 X-Received-Date: Sat, 04 Oct 2008 15:02:22 EDT (text.usenetserver.com) On Oct 2, 6:45=A0pm, DA Morgan wrote: > hpuxrac wrote: > > There is absolutely no sense in the statement "You can not make SAN > > replication synchronous" > > Actually there is: Oracle is not going to rollback a transaction > because the SAN can not replicate it. If you would like to name > and contact information for the product manager at Oracle contact > me off-line. Why don't you read up on synchronous replication? Oracle tries to write something ( say it is a log file block or anything ) ... storage device A receives the write ... it transmits it to storage device B ... storage device B acknowledges back to A that it has the write ... before giving IO ack to oracle. It is done block by block and has nothing to do with Oracle transactions. Sounds like you are just making up stuff.