Data Guard across platforms?

Hi All,
Does Oracle 10g data guard work across platforms; like primary db in Windows standby in linux or primary in solaris and standby in aix or something like that?...
Thanks & Regards,
Rosh

Does Oracle 10g data guard work across platforms; like primary db in Windows standby in linux or primary in solaris and standby in aix or something like that?...No, its not possible,both server should have same operating system,but u can achieve it by using oracle streams.its works with different platforms.
Kuljeet

Similar Messages

Data Guard - Different Platforms

Hello,
I'm currently looking at Oracle's Data Guard/Standby DB option. (Standard Edition Version) Our primary database is on a Sun Solaris Sparc system and we want to have our Standby on an Sun Solaris Intel system. Is this possible with Sun Sparc? Will I run into issues attempting to apply the redo logs?
Help??? :)
Edited by: user10448714 on Aug 13, 2009 9:47 AM

Check these Metatlink notes they may help you out here.
execute this SQL for a database on the 2 platforms
SQL> select platform_id, platform_name from v$database;
You will need to check the platform_id for solaris it is 2, if the intel solaris is 2 then according to the document it should work.
For a complete list of supported platform/OS combinations see Metalink Note 413484.1
See Oracle Metalink Notes 395982.1 and/or 414043.1 for more exact restrictions and further details.

Data Guard Broker - platform requirements

Hi there,
I've been checking the docs and haven't been able to find a definitive answer - my question is, if you have your primary and standby databases on a 64-bit architecture (HP-UX64 for example), can you have the broker that manages that configuration on a 32-bit architecture (Windows, Linux etc)?
Any advice would be greatly appreciated. If anyone has a setup like what I've described, please let me know.
Many thanks,
IM

Hi again, I've managed to answer my own question (from AskTom):
http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:4111318776437#60461502943814
"observer"? you mean the data guard monitor. Yes, the standby must be on the same platform as the
primary - but the monitoring software (enterprise manager stuff) may be elsewhere.
Cheers,
IM

Init SID .ora during configuration of Data Guard - advice required

Hi All,
I am looking to implement data guard across 2 RAC clusters. One cluster will be primary and the other is for Disaster Recovery.
I have already set up the two 11g R 2 RAC clusters on RHEL 5 and now need some pointers to good docs for data guard install.
Can some one direct me to good step by step info for configuring data guard between to RAC clusters - detailed explanations of each step would be useful too, in particular around the init.ora file configuration changes between the primary and DR sites
Much appreciated
Steve

Hi Steve,
look at the MAA Whitepapers:
http://www.oracle.com/technetwork/database/features/availability/oracle-database-maa-best-practices-155386.html
There are very good ressources in setting up RAC DG environments like:
Data Guard 11g Installation and Configuration Best Practices on Oracle RAC
Rapid Oracle RAC Standby Deployment: Oracle Database 11g Release 2
Setup Guide: Creating a RAC Logical Standby Database for a RAC Primary Database
Client Failover in Data Guard Configurations for Highly Available Oracle Databases
a.s.o.
Sebastian

Oracle 9i Data Guard supported on Windows 2000 platform ?

Is Oracle 9i Data Guard supported on Windows 2000 platform ?

YES, we are currently using Data guard on 2000 Windows Server. Will need to have the Management server installed in order to get the Data guard function.

Data Guard - Keeping same SID/Instance Name across both sites

Hello,
We are working on a project to move the databases from legacy to new servers. The migration plan is to use Data Guard option for our migration strategy. We would like to know followings.
1) Is it possible to build stand by databases with same instance name of legacy primary instances? If so, how it could be?
2) If not, we can build stand by database with different instance name (DB_UNIQUE_NAME). Do the switch over and cut off the replication with legacy primary database. Once done, What other alternative do we have to change the instance name same like legacy database instances?
The ultimate goal is to retain same DB name and instance name in new server with minimum downtime.
Database - 11.2.0.3.0
Database Type - Oracle restart and RAC
O.S. - RHEL 6.3
The requirement is have same DB name and instance name across sites.
Primary site - X node
Primary DB - EODSS
Primary DB instances - EODSS1, EODSS1
Standby Site - Y node
StandBy DB - EODS
StandBy instances - EODSS1, EODSS1
Thanks,
Pankaj
Edited by: user12025125 on Feb 22, 2013 12:33 PM

Hello;
1) Is it possible to build stand by databases with same instance name of legacy primary instances? If so, how it could be?
Yes. Not sure I understand the second part of the question. I like to think of a standby database and a primary database as the same database in different modes. RMAN treats them as the same. They have the same DBID.
2) If not, we can build stand by database with different instance name (DB_UNIQUE_NAME). Do the switch over and cut off the replication with legacy primary database. Once done, What other alternative do we have to change the instance name same like legacy database instances?
It should not matter what the database name is. Almost everything connects using an Alias. I find it easier to use a slightly different name for the Standby because then I know which site I'm working on. What I did was put an S in front of the name on the standby side to keep them apart in my mind. A tnsnames entry can handle the rest. So yes you can do that, but it might be harder to keep track that way.
ernie =
(DESCRIPTION =
    (ADDRESS_LIST =
       (ADDRESS = (PROTOCOL = TCP)(HOST = primary.server)(PORT = 1521))
       (ADDRESS = (PROTOCOL = TCP)(HOST = standby.server)(PORT = 1521))
       (CONNECT_DATA =
       (SERVICE_NAME = ernie)
)Best Regards
mseberg

Current (LV2012) best way to serve data across platforms

I'm interested in hearing what people would regard as the current best way do the following:
I'd like to publish data from labview in a format that can be read over a network across platforms. The data should be not just be visible, but it should be fairly simple for someone writing their own code, say on a Unix machine, to integrate this data into their programs. Some more specific are probably in order. In its simplest form we would like to transfer a 1d array of doubles (say of length 30) plus an image file (say 600x400 pixel jpeg) and update about every 5 second. The "client" would just read this data in at need, and there is no requirement that the client be able to access data other than the current data cluster at the moment it read the data - unread data is just thrown away when the next update arrives. Is a webservice the only/best way to do this at this time?

you might want to check Shared Variables (OPC)
A stupid thought maybe, but File IO is always a possiblity as well, might not be the best one, but will certainly work....
Kind regards,
- Bjorn -
Have fun using LabVIEW... and if you like my answer, please pay me back in Kudo's
LabVIEW 5.1 - LabVIEW 2012

Data guard between different platforms?

I'm pretty sure the answer is no but just want to be sure, so my question is...Can you have a data guard physical standby server that is running on a different platform than the primary?
For instance, We have just been informed by our sakes rep that Oracle is dropping the Itanium platform because future releases of red hat will no longer be supporting the Itanium platform and that Oracle is following the red hat model...
Can we setup dataguard to migrate off of current hardware platform to a new X86_64 platform?
Thanks.

user520056 wrote:
I'm pretty sure the answer is no but just want to be sure, so my question is...Can you have a data guard physical standby server that is running on a different platform than the primary?No, this is not possible.
For instance, We have just been informed by our sakes rep that Oracle is dropping the Itanium platform because future releases of red hat will no longer be supporting the Itanium platform and that Oracle is following the red hat model...
Can we setup dataguard to migrate off of current hardware platform to a new X86_64 platform?
Thanks.This would follow the same rule that both, primary and standby must run on the same platform and o/s. So I guess, the answer would be that you would need to move both of your servers. But, just to be assure, you should raise the same question on the dedicated forum of dataguard where product manager of DG , Larry Carpenter hangs around as well. That would be the place where I would ask my data guard doubts.
Data Guard
HTH
Aman....

Configure about the DATA GUARD APPLICATION on ORACLE 9i platform

I have worked on Oracle 9i (9.2.0.1) platform. I have installed Oracle 9i server edition in my machine, and created one database name ORCL.
I want to configure DATA GUARD APPLICATION in my machine... is it possible?
if it is then how can I do this...

Yes, it is possible.
Please refer to the Dataguard Concepts and Administration Manual for installation guidance.
Please do not bother to come back to ask further doc questions, showing you are not prepared to do your own work.
Sybrand Bakker
Senior Oracle DBA

Location of log directory with respect to data guard

I am working with Oracle 10g in Linux platform
I was during a switchover from primary to standby which failed due to the incorrect settings of log_file_name_covert parameter . To debug this case I was going through Oracle Documentation material for Data Guard ....http://download-uk.oracle.com/docs/cd/B19306_01/server.102/b14239/troubleshooting.htm
There I came across this para
When the switchover to change the role from primary to physical standby was
initiated, a trace file was written in the log directory. This trace file contains the
SQL statements required to re-create the original primary control file. Locate the
trace file and extract the SQL statements into a temporary file. Execute the
temporary file from SQL*Plus. This will revert the new standby database back to
the primary role.
I was not able to understand what the trace file and log directory means ? Which is the location of log directory ?
Can anyone please explain ?

It was talking about a trace will be placed under your background dump destination. As you would have using
alter database backup controlfile to trace;Check your background dump destination where your alert log is.

Data Guard Scenario

Hi,
We have a data guard configuration with 1 primary and 2 standy databases. Two databases are local means physically located next to each other and one is across the WAN. The 2 local databases are candidate of fast start failover and we also have a observer on separate box. For testing purposes, when we pull the network cables from 2 local databases to make third one primary, the whole data guard broker hangs and doesn't allow us to run any command using DGMGRL to manually failover to third database running across WAN. So we have to disable the dg broker process on third database manually and convert it to primary without broker. Then when we put the network cable back for those 2 local servers, the observer thinks that one of that is primary and try to start that database as primary and also try to convert third database as standby by flashing it back to previous scn and it never succeeded. In order to make everything work, we have to manually convert the roles of all the databases and make them in sync and delete the broker configuration and readd it. It's too messy to deal with, I am wondering if there is any clean way to failover back to local databases.
Database Version: 10.2.0.4
Platform: Linux
Thanks
Daljit Singh

Thanks for the reply!
Yes, all the 3 databases are being observed by the observer which is running on 4th box but the third database is not candidate of fast start failover. when we pull the cable from 2 servers, the observer box is still able to ping the third box server. Both of the standby are in sync with primary, there is no problem converting third database to primary manually by shutting down dg broker and doing it using alter database command. But the problem is when we do this then the broker configuration doesn't get updated and when we try to put other 2 databases online, broker think that the local database is primary and then all the problem starts. Before all this test, everything was working, configuration was perfect, and both the standbys were catching up.
Mainly I want to find out if there is any way to failover to third database using broker when we pull network cables from local stores. Right now, as I mentioned, it hang when we pull cables from local servers and it doesn't allow us to run any command from dgmgrl, all commands failed with time out error.
Thanks
Daljit Singh
Edited by: Daljit on Sep 30, 2009 11:17 AM

CONVERT Redo Logs across platforms - 10g or even 11?

Hi all,
I've seen that it's possible to convert databases across platforms on
10g, but have not seen a reference to the Redo Logs. Can these
be converted across platforms? Interested in AIX to Linux - there are
obvious problems of endianess - anybody any experience?
TIA.
Paul...

To be able to share archived log files, the two database must be identical on a block-for-block basis. Logical Standby use SQL apply where physical organization and structure of the database can be different from primary.
In both cases, the Oracle need to be on same OS platform.
In 11g that requirement is not lifted.
What's New in Oracle Data Guard 11g?

Data Guard Set-up

Hi All,
Platform - RHEL 6, Oracle 11gR2.
My Primary server is new hardware with more space and memory. The data files are striped across more mount points. Memory - 16G
Plan to install a Oracle Data Guard 11gR2 on a old server for testing only. Memory 3G. Due to lack of space we can't have so many mount points as production.
My question is Can I setup Data Guard in this limitation on my test server. How will it map with the mount points in production system.?
Is there any good document on this.?

My Primary server is new hardware with more space and memory. The data files are striped across more mount points. Memory - 16G
Plan to install a Oracle Data Guard 11gR2 on a old server for testing only. Memory 3G. Due to lack of space we can't have so many mount points as production.
My question is Can I setup Data Guard in this limitation on my test server. How will it map with the mount points in production system.?The setup is same, But it will depends on how you use parameters.
Lets suppose you want to perform to build standby using RMAN duplicate, Even the datafiles are stripped in different mount points, just you need to take care of parameters
Ex: primary locations /u01/oradata/prod, /u02/oradata/prod, /u03/oradata/prod
Standby location just /u05/oradata/stby
So you have to configure them as
DB_FILE_NAME_CONVERT='/u01/oradata/prod','/u05/oradata/stby','/u02/oradata/prim','/u05/oradata/stby','/u03/oradata/prod','/u05/oradata/stby'
Also take care of LOG_FILE_NAME_CONVERT
refer this.
http://docs.oracle.com/cd/B19306_01/server.102/b14237/initparams048.htm
Remaining configuration is same. check below links for that
http://docs.oracle.com/cd/B19306_01/server.102/b14239/rcmbackp.htm#i636427
Step By Step Guide To Create Physical Standby Database Using RMAN [ID 469493.1]
You can perform RMAN duplicate from active database for the versions from 11gRx
http://docs.oracle.com/cd/B28359_01/server.111/b28294/rcmbackp.htm#i636427
Thanks.
>
user13355115
     Newbie
Handle:      user13355115
Status Level:      Newbie
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Total Questions:      62 (56 unresolved)
>
Consider closing thread if answered and keep the forum clean.
Thanks.
Edited by: CKPT on Apr 18, 2012 1:58 PM

How do i find dataloss in Data Guard?

We are using redo log, in async mode, following is our setting.
SERVICE=xxx_sb max_failure=100 reopen=600 LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=xxx_sb
When i query V$managed_Standby for delay_mins, its always zero. Meaning there is no delay in copying a log. I have 2 questions..
1. How can i communicate to business that in worst case we will lose x Mintues of data? Its an OLTP, where the transactions are less then 2mins. Also during the night there are some batch jobs where the transactions are 60mins longs.
2. Most of the time during peak hours there is a log switch happening every 10-15mins but during non-peak it may not happen for a long period of time, is it advisable to set ARCHIVE_LAG_TIME to 10 mins? as im not using archiver , we are using log writer for standby.
any explanation or point to documentation would be appreciated,
Thanks,

Production databases who are running with fully fined configured Data Guard, do'nt have any dataloss because failover operation ensures zero data loss if dataguard is configured with maximum protection mode or maximum availability mode at failover time.
http://www.dbazone.com/docs/oracle_10gDataGuard_overview.pdf
The above pdf is oracle white paper which too confirmed it.
LGWR SYNC AFFIRM in Oracle Data Guard is used for zero data loss. How does one ensure zero data loss? Well, the redo block generated at the primary has to reach the standby across the network (that's where the SYNC part comes in - i.e. it is a synchronous network call), and then the block has to be written on disk on the standby (that's where the AFFIRM part comes in) - typically on a standby redo log.
Can you have LGWR SYNC NOAFFIRM? Yes sure. Then you will have synchronous network transport, but the only thing you are guaranteed is that the block has reached the remote standby's memory. It has not been written on to disk yet. So not really a zero data loss solution (e.g. what if the standby instance crashes before the disk I/O).
To sum up -> LGWR SYNC AFFIRM means primary transaction commits are waiting for ntk I/O + disk I/O acks. LGWR SYNC NOAFFIRM means primary transaction commits are waiting for ntk I/O only.
Source:http://www.dbasupport.com/forums/showthread.php?t=54467
HTH
Girish Sharma

What are the pros and cons using Active Data Guard vs Data Guard?

My understanding is that Active Data Guard is an additional database option for Oracle 11gR2 Enterprise Edition. I need to know the pros and cons using Active Data Guard vs Data Guard in order to decide whether to get pay extra for the Active Data Guard.
Thanks for any help.

Hemant K Chitale wrote:
Before jumping in to Active Data Guard, one needs to evaluate :
a. Is there really a need to run queries on the Standby ? The Standby could / should be at a remote site so queries are "across the network". Depending on the nature of the queries and the volume of output, the "performance" of the queries may not seem to be the same.
b. If the database is not in Maximum Protection mode, the data "seen" at the standby may not be in "real-time" synch
c. Not all applications are truely read-only when querying. Some applications use "jobs" that write to tables when querying. Such would not work with Active DataGuard. (example : EBusiness Suite). There are very complicated ways of handling this -- and one needs to consider if the complications can be introduced and supported.
Over the network accessing standby read only is really not an good idea, I think no one will compare performance with primary and standby,
But some of them they want to validate data which are very critical, as it is matching with primary or not, Its an added advantage with ACTIVE DATAGUARD
Prior to that until unless stop MRP, open database and then we need to validate, So there is an interruption of recovery, I can say its also an advantage where there is no interruption of recovery.

Data Guard across platforms?

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