Some Context Oracle database was hosted on ZFS Storage Appliance (NAS). The database files are accessible from the database server node via NFS mounted filesystems. Solaris 10 is the operating system on DB node. Someone forgets to shutdown the database instance and unmount the remote filesystems before rebooting the database server node. After the system boots up, Oracle RDBMS fails to bring up the database due to locked-out data files. eg., SQL> startupORACLE instance started.Total System Global Area 1.7108E+10 bytesFixed Size 2165208...
Monday, 10 October 2011
Oracle Database on NFS : Resolving "ORA-27086: unable to lock file - already in use" Error
Posted on 17:45 by Unknown
Thursday, 6 October 2011
Siebel Connection Broker Load Balancing Algorithm
Posted on 12:38 by Unknown
Siebel server architecture supports spawning multiple application object manager processes. The Siebel Connection Broker, SCBroker, tries to balance the load (incoming requests) across different object manager processes running in a single Siebel server. Least Loaded or Round Robin?By default, SCBroker forwards the incoming request to any object manager process that is least loaded - meaning the process with the least number of running tasks. In Siebel terminology, this behavior is referred as "least-loaded" or "LL" connection forwarding algorithm....
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