Sunday, October 29, 2017

ORA-00313 ORA-00312 ORA-17503 ORA-15173 in Standby Alert Log File

Errors in file /u01/app/oracle/diag/rdbms/standby_db/standby_db/trace/standby_db_lgwr_393229.trc:
ORA-00313: open failed for members of log group 12 of thread 2
ORA-00312: online log 12 thread 2: '+FRA_DG/standby_db/redolog12_02.rdo'
ORA-17503: ksfdopn:2 Failed to open file +FRA_DG/standby_db /redolog12_02.rdo

Monday, October 23, 2017

Creating a Real Application Cluster(RAC) 12c database using DBCA

After installing Oracle RAC, next step is to create a RAC database. Following is the process of creating a RAC database using dbca. Same method works on Windows or Unix based platforms.To invoke dbca, open a command line and run command “dbca”. On Windows, DBCA can also be invoked from Program Menu..

Tuesday, October 10, 2017

Oracle Flex Cluster

Oracle Real Application Cluster is a feature that was first introduced in Oracle 9i (Oracle Parallel Servers was a similar feature available before 9i, but not as robust as RAC) and has been an essential part of Oracle’s Maximum Availability Architecture. Since its advent in Oracle 9i, it has evolved a lot. Oracle 9i onward, every new release of Oracle has introduced something new in RAC which made it even more resilient, fault tolerant, and easy to manage architecture.

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