and if you need the remote site to support users, you could use the
logical standby feature of 9iR2, which generates SQL statements to be
applied and allows the database to be open and active.
- Tim Gorman <Tim_at_SageLogix.com> wrote:
> why wouldn't you consider simply using the standby database feature?
>
> do you need the remote site to support users also?
>
> ----- Original Message -----
> To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com>
> Sent: Sunday, June 09, 2002 11:43 AM
> (online redo logs)
>
>
> > Hello All
> >
> > I just had a meeting today about replication.
> > The situations is: One master db that is currently replicated
> > (master to master synchronous replication) to a second DB.
> > Both machines are NT and the is a direct cable connection
> > between the network cards on both machines.
> >
> > However, this solves the problem of machine failure but does not
> cover
> > the full disaster recovery as both machines are in the same room.
> > In case of fire both machines will be destroyed.
> >
> > We are thinking about adding asynchronous replication to replicate
> the
> > changes
> > across wan to a remote site. The problem is that this will load the
> > production system and the network link (wan is expensive), as the
> system
> > generates during peek time 10MB of archive logs every 2-3 minutes.
> >
> > I saw that some of you are using Quest Shareplex.
> > Can you share your reasons, success stories etc?
> > Benchmarks results will be very welcome.
> >
> > TIA
> >
> > Yechiel Adar
> > Mehish
> > ----- Original Message -----
> > To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
> > Sent: Thursday, June 06, 2002 4:32 PM
> > (online redo logs)
> >
> >
> > NB_ RESENDING in plain text - sorry, Outlook keeps seinding in html
> no
> > matter what default i set!
> > Hi lists,
> >
> > I am using Quest Shareplex product for Oracle to Oracle one way
> > replication. I have two systems (source and target) and two
> environments
> > (dev, demo). On system one, the environments are setup as schemas
> within
> > one oracle instance (therefore each schema will be a SOURCE in the
> > replication). My other system has each environment set up a
> separate
> Orace
> > Instances (therefore each instance will become a TARGET in the
> replication).
> >
> > I am trying to configure 2 separate replication streams (ie so
> that
> each
> > replication process is SEPARATE from the other - one for DEV and
> one for
> > DEMO). I will accomplish this by setting up Shareplex to use
> mulitple
> > processes.
> >
> > HOWEVER, Quest technical support has told me that this will
> cause
> > contention. However, I dont see why is would from an os/oracle
> point of
> > view. Basically Shareplex has a process which reads the online
> redo
> > logs......... tech support is suggesting that is there a two
> processes
> > trying to access the same block in the logs that contention can
> occur.
> This
> > does not make sense to me. Below is the blurb from techincal
> support when
> I
> > questioned their initial repsonse:
> >
> >
>
> > *************************************************
> > The reason you might run into a contention is because multiple
> captue
> > processes may be reading the same data block in the redo log.
> Since there
> > is only one process that can access a single block, the other
> process may
> > have to wait.
> > Contention is a possibilty, and you will need to run some bench
> marks to
> > find out how much, if any, contention you will have.
> >
>
> > *************************************************
> >
> > I would find it HARD to believe that only ONE process can read a
> block at
> a
> > time. If this were true, then OLTP system would FAIL miserably!
> >
> > Anyone have any ideas/comments regarding the OS and Oracle
> interaction
> ....
> > I mean are not the logs at this pointa UNIX file? and can't
> multiple
> > processes read a single unix file without bringing the whole system
> to its
> > knees?
> > Also, I am NOT knocking the techincal support, but I believe that
> the
> > opinion was formulated on an incorrect assumption on the operating
> system
> > and Oracle.
> > Thoughts/comments?
> >
> > Thanks in advance.
> >
> > Hannah
> >
> >
> >
> >
> >
> > --
> > Please see the official ORACLE-L FAQ: http://www.orafaq.com
> > --
> > Author:
> > INET: johanna.doran_at_sungard.com
> >
> > Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051
> > San Diego, California -- Public Internet access / Mailing
> Lists
> >
> --------------------------------------------------------------------
> > To REMOVE yourself from this mailing list, send an E-Mail message
> > to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
> > the message BODY, include a line containing: UNSUB ORACLE-L
> > (or the name of mailing list you want to be removed from). You may
> > also send the HELP command for other information (like
> subscribing).
> >
> > --
> > Please see the official ORACLE-L FAQ: http://www.orafaq.com
> > --
> > Author: Yechiel Adar
> > INET: adar76_at_inter.net.il
> >
> > Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051
> > San Diego, California -- Public Internet access / Mailing
> Lists
> >
> --------------------------------------------------------------------
> > To REMOVE yourself from this mailing list, send an E-Mail message
> > to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
> > the message BODY, include a line containing: UNSUB ORACLE-L
> > (or the name of mailing list you want to be removed from). You may
> > also send the HELP command for other information (like
> subscribing).
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Tim Gorman
> INET: Tim_at_SageLogix.com
>
> Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051
> San Diego, California -- Public Internet access / Mailing
> Lists
> --------------------------------------------------------------------
> To REMOVE yourself from this mailing list, send an E-Mail message
> to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
> the message BODY, include a line containing: UNSUB ORACLE-L
> (or the name of mailing list you want to be removed from). You may
> also send the HELP command for other information (like subscribing).
Do You Yahoo!?
Yahoo! - Official partner of 2002 FIFA World Cup
http://fifaworldcup.yahoo.com
--
Please see the official ORACLE-L FAQ: http://www.orafaq.com
--
Author: Rachel Carmichael
INET: wisernet100_at_yahoo.com
Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051
San Diego, California -- Public Internet access / Mailing Lists
--------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from). You may
also send the HELP command for other information (like subscribing).
Received on Sun Jun 09 2002 - 21:33:19 CDT
