Few of my clients are still running older versions of SQL Server and they have their own reasons to not to move to the new SQL version. In this blog, we would learn about the fix of an error for which my client contacted me. My client was trying to apply the patch to a SQL Server 2008 R2 clustered instance which was running on Window Server 2012 and getting the error: Unable to retrieve the Cluster Service – Not clustered or the cluster service is up and online.
SQL SERVER – Always On Availability Group Listener Missing in SSMS but Working Fine in Failover Cluster Manager
I have helped many customers to solve complex issues in their environment by Comprehensive Database Performance Health Check. Sometimes, the issue looks very complex but once the solution is found it seems very easy. In this blog, we would learn about a situation where the listener is missing in SSMS but working fine in failover cluster manager (cluadmin.msc).
There have been many questions in my mailbox asking about exact steps to change the windows cluster and SQL failover cluster IP address to the new VLAN. In this blog, I would outline the steps which are needed to perform this migration.
During my On Demand (50 Minutes) consultancy, I solve the issue which seems quick to my client. SQL not starting, AlwaysOn not failing over, Cluster not working are few of quick things where my clients engage me. In this blog, I would share a situation where Always On Availability Group was not coming online due to error – Did not find the instance to connect in SqlInstToNodeMap key.