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Home -> Community -> Mailing Lists -> Oracle-L -> Re: I/O contention with external process reading the oracle logs (online redo logs)
why wouldn't you consider simply using the standby database feature?
do you need the remote site to support users also?
> 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:
>
>
-- 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).Received on Sun Jun 09 2002 - 13:43:19 CDT
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