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MQSeries.net Forum IndexWebSphere Message Broker SupportConfigure DataDirect ODBC connections for failover

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varunraot
PostPosted: Thu Jan 03, 2019 1:44 am Post subject: Configure DataDirect ODBC connections for failover Reply with quote

Acolyte

Joined: 01 Jun 2011
Posts: 63

I have Oracle DB instance(12C) which uses Real Application Clusters and IIB V10.0.0.9 is application ESB which connects to Oracle.

Primary Servers(A) = orarac5.corp.ent.com, orarac6.corp.ent.com and orarac7.corp.ent.com

Standby Servers (B) = orarac9.corp.ent.com, orarac10.corp.ent.com and orarac11.corp.ent.com


Observations

1)Database switchover (Make B primary and A stand by) IIB application works.

2) Bring down A while B is still up - IIB fails and alerts

3) Bring back A while B is still up - IIB recovers

4)Switchback (Make A primary and B stand by) - IIB works



Driver=/opt/IBM/mqsi/iib-10.0.0.9/server/ODBC/drivers/lib/UKora95.so
Description=DataDirect ODBC Oracle Wire Protocol
HostName=orarac5.corp.ent.com
PortNumber=1521
ServiceName=X
Primary DB Server Config
AlternateServers= (HostName=orarac5.corp.ent.com:PortNumber=1521:ServiceName=A,
HostName=orarac6.corp.ent.com:PortNumber=1521:ServiceName=A,
HostName=orarac10.corp.ent.com:PortNumber=1521:ServiceName=A,
HostName=orarac11.corp.ent.com:PortNumber=1521:ServiceName=A,
HostName=orarac7.corp.ent.com:PortNumber=1521:ServiceName=A)
CatalogOptions=0
EnableStaticCursorsForLongData=0
ApplicationUsingThreads=1
EnableDescribeParam=1
OptimizePrepare=1
WorkArounds=536870912
ProcedureRetResults=1
ColumnSizeAsCharacter=1
LoginTimeout=10
QueryTimeout=60
FailoverMode=1
FailoverPreconnect=1
ConnectionRetryCount=2
ConnectionRetryDelay=1

I would like to understand the reason for # 2( highlighted in bold above) and anything needed to make it work in the case of #2.

Appreciate your support.
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timber
PostPosted: Thu Jan 03, 2019 2:09 am Post subject: Reply with quote

Guardian

Joined: 25 Aug 2015
Posts: 919

What does the IIB 'alert' say? (please quote the entire message)
What about:
5) Bring down B while A is still up? ( i.e. does this problem happen regardless of which server is the primary?)
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