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svu
PostPosted: Wed Nov 30, 2011 4:21 am    Post subject: Oracle RAC and WMB Reply with quote

Voyager

Joined: 30 Jan 2006
Posts: 99
Hello folks

We recently had some reliability issues with Oracle RAC and WMB (v7) - having multiple ADDRESSes in tnsnames.ora cause more troubles than reliability - once the currently active Oracle node goes down, the broker cannot recover. We searched for some official document explaining the right way to configure TNS for RAC (for the broker) - found nothing. Is there such a paper?

If no - perhaps some informal guidelines?

More generic question: if tnsnames.ora mentions multiple nodes, what does broker do if one Oracle node goes down? How does it switch to another node? What happens to the pooled connections? What happens to the messages that are currently being processed?
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fjb_saper
PostPosted: Wed Nov 30, 2011 9:06 am    Post subject: Re: Oracle RAC and WMB Reply with quote

Grand High Poobah

Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
svu wrote:
Hello folks

We recently had some reliability issues with Oracle RAC and WMB (v7) - having multiple ADDRESSes in tnsnames.ora cause more troubles than reliability - once the currently active Oracle node goes down, the broker cannot recover. We searched for some official document explaining the right way to configure TNS for RAC (for the broker) - found nothing. Is there such a paper?

If no - perhaps some informal guidelines?

More generic question: if tnsnames.ora mentions multiple nodes, what does broker do if one Oracle node goes down? How does it switch to another node? What happens to the pooled connections? What happens to the messages that are currently being processed?


You need to VERY CAREFULLY change the URL Format on the configurable service for the DB, and then fill out the parms accordingly.
My recommendation is to seek guidance from IBM there and open a PMR.
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