From: Mohan Sundaram (Mohan_Sundaram@emitac.ae)
Date: Mon Mar 01 2004 - 00:38:15 EST
Hi Folks,
Thank you all for providing me your inputs on this. Everybody seems to reflect the same Idea that modifying the hostname may result in many problems. Interestingly, I had lodged a call with HP for this and they came up with the below document,
----------------------------------------------------------------------------------------------------------------------------------------
link <http://technet.oracle.com/products/ias/files/9iAS_Infra_HA_HPUX.zip> http://technet.oracle.com/products/ias/files/9iAS_Infra_HA_HPUX.zip
youŽll get a package where you find a document called
"Oracle9i Application Server Infrastructure:
Improved Availability with MC/ServiceGuard on HP-UX" (pdf attached) ,
which states:
Page 2:
Limitations:
...
2) Upon implementation of this solution, the active runtime of one of the
two nodes of the cluster will be with the node's hostname set to a
virtual hostname and not to the original hostname registered for the
cluster. This will result in some MC/ServiceGuard commands to fail on
that node. MC/ServiceGuard commands will work as expected on the other
node.
Page 7:
...
Note that the cmhaltpkg package1 command to stop the
package/infrastructure needs to be executed on the node that is not
running the package/infrastructure since running the
package/infrastructure will change the hostname of that node to the
virtual hostname and since MC/ServiceGuard commands will not execute
properly when the system is set to the virtual hostname (see the
LIMITATIONS section). Since a successfully executed cmhaltpkg package1
will restore the hostname back to the original hostname on the node where
the package/infrastructure was stopped, all MC/ServiceGuard commands will
function properly on that node until the package/infrastructure is
restarted.
----------------------------------------------------------------------------------------------------------------------------------------
I had further asked Oracle people to provide me the document which states that the host name needs to be modified. They have also opened a tar for the same.
Meanwhile I am checking with HP if the serviceguard A.11.15 too is having this limitation.
I will post the final conclusion to the forum once I get replies from HP and Oracle.
Thanks once again for all your time.
With regards,
Mohan.
-----Original Message-----
From: Mohan Sundaram
Sent: Wednesday, February 25, 2004 4:30 PM
To: 'hpux-admin@dutchworks.nl'
Subject: Question on Serviceguard+oracle 9i
Hi Folks,
I have an installation where 2 HP-UX 11i (rp7410) systems are configured in serviceguard 11.15. Oracle people are installing 9i Infrastructure on the setup. They have put a startup and halt script for the package, wherein they are explicitly modifying the hostname by
hostname <virtual IP hostname>
I have a concern if this is a correct practice. Whenever I move the package and test, it modifies the hostname. I cannot restart the cluster without rebooting or manually modifying the hostname back to its original name.
In case of a LAN heartbeat failure the package may switch to the adoptive node and both the primary and adoptive nodes may have the same Hostnames in that scenario.
Any of you have encountered this problem? if so, how was this tackled?
Thanks in Advance.
With regards,
Mohan.
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