I recently was asked an interesting question: "How is it possible to start the ASM instance if the spfile itself is stored in an ASM disk group? During ASM instance startup the disk groups themselves are closed, aren't they ?" Beginning...

Managing a healthy cluster belongs to the most important goals of every cluster stack, and Oracle Clusterware is not an exception to this rule. To ensure cluster and data integrity unhealthy nodes should be forcefully evicted from a cluster. A node eviction...

At the Oracle Open World 2011 in San Francisco Markus Michalewicz (Senior Principal Product Manager) announced in two sessions that there is a behavior change introduced with the 11.2.0.3 Patch Set regarding multicasting requirement for the cluster interconnect...

Lately I've stared to work on a quite interesting Oracle Maximum Availability Architecture (MAA) project, with HP blades and Virtual Connect. From flexibility point of view the decision has been made to install operating system (Oracle Enterprise...

In September 2010 Oracle introduced an own Unbreakable Enterprise Linux kernel based on the version 2.6.32. For more information see Oracle White Paper http://www.oracle.com/us/technologies/linux/uek-for-linux-177034.pdf The installation of the new Oracle...

With the 11.2.0.2 patch set Oracle introduced a new quite interesting feature - ACFS replication. It might be very useful, especially in MAA configurations (Real Application Cluster with Data Guard) in case the primary database creates files on an ACFS...

Traditionally high availability for Oracle cluster interconnect has been achieved with OS methods, like Linux kernel bonding module. The idea is simple: we aggregate at least two network cards into one bonded logical interface using different available...