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тАО02-22-2009 12:44 PM
тАО02-22-2009 12:44 PM
Hi,
Has anyone implemented Oracle 11g RAC along with Oracle Data Guard on Service Guard Cluster ?
Appreciate if someone can post documentation related to this.
Thanks,
Shiv
Has anyone implemented Oracle 11g RAC along with Oracle Data Guard on Service Guard Cluster ?
Appreciate if someone can post documentation related to this.
Thanks,
Shiv
Solved! Go to Solution.
3 REPLIES 3
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тАО02-22-2009 04:05 PM
тАО02-22-2009 04:05 PM
Re: Oracle 11g RAC along with Oracle Data Guard
Shalom,
One of the customers at my previous job did exactly this. Active-Passive RAC cluster with 9g and then 10g RAC.
Service Guard was not really required after the move to 10g RAC, but the kept using it to manage an NFS share for log writing.
With regards to documentation, get the RAC docs from http://technet.oracle.com
http://docs.hp.com/en/ha.html
SEP
One of the customers at my previous job did exactly this. Active-Passive RAC cluster with 9g and then 10g RAC.
Service Guard was not really required after the move to 10g RAC, but the kept using it to manage an NFS share for log writing.
With regards to documentation, get the RAC docs from http://technet.oracle.com
http://docs.hp.com/en/ha.html
SEP
Steven E Protter
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
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Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com
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тАО02-22-2009 11:32 PM
тАО02-22-2009 11:32 PM
Solution
Shiv,
There's nothing special about using Dataguard in a serviceguard for RAC configuration when comnpared to a clusterware RAC database. See the section in the Dataguard manual that covers Dataguard with RAC:
http://download.oracle.com/docs/cd/B28359_01/server.111/b28294/rac_support.htm#i641721
If at all possible, once Dataguard is setup, I'd also configure it to use the Dataguard broker, for which there is a seperate manual here:
http://download.oracle.com/docs/cd/B28359_01/server.111/b28295/toc.htm
The broker makes managing Dataguard much much easier...
Be aware that althought Dataguard Broker works with Serviceguard Extension for RAC, it *does not* work with a cold-failover database configured in a Serviceguard cluster.
Other important points to consider with RAC databases in a Dataguard configuration:
i) Be aware t6hat only one node on the standby database is doing log apply, so if you are using RAC for performance, ypu might find that the Dataguard database can't keep up, as it is trying to apply logs for more than one instance at the source...
ii) Try not to use any Dataguard mode which uses synchronous log shipping. (I think this is the maximum availability and maximum protection modes). In synchronous mode, if one of your source RAC nodes is down, then all nodes will stop sending data to the standby (as in synchronous mode the logs have to be applied in order and acknowledged) - i.e. if you lose local HA, you also use remote DR.
HTH
Duncan
I am an HPE Employee
There's nothing special about using Dataguard in a serviceguard for RAC configuration when comnpared to a clusterware RAC database. See the section in the Dataguard manual that covers Dataguard with RAC:
http://download.oracle.com/docs/cd/B28359_01/server.111/b28294/rac_support.htm#i641721
If at all possible, once Dataguard is setup, I'd also configure it to use the Dataguard broker, for which there is a seperate manual here:
http://download.oracle.com/docs/cd/B28359_01/server.111/b28295/toc.htm
The broker makes managing Dataguard much much easier...
Be aware that althought Dataguard Broker works with Serviceguard Extension for RAC, it *does not* work with a cold-failover database configured in a Serviceguard cluster.
Other important points to consider with RAC databases in a Dataguard configuration:
i) Be aware t6hat only one node on the standby database is doing log apply, so if you are using RAC for performance, ypu might find that the Dataguard database can't keep up, as it is trying to apply logs for more than one instance at the source...
ii) Try not to use any Dataguard mode which uses synchronous log shipping. (I think this is the maximum availability and maximum protection modes). In synchronous mode, if one of your source RAC nodes is down, then all nodes will stop sending data to the standby (as in synchronous mode the logs have to be applied in order and acknowledged) - i.e. if you lose local HA, you also use remote DR.
HTH
Duncan
I am an HPE Employee
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тАО02-22-2009 11:33 PM
тАО02-22-2009 11:33 PM
Re: Oracle 11g RAC along with Oracle Data Guard
ach... too early for me. I meant to say:
if you lose local HA, you also lose remote DR
HTH
Duncan
I am an HPE Employee
if you lose local HA, you also lose remote DR
HTH
Duncan
I am an HPE Employee
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