Category: RAC, ASM & Clusterware

RAC, ASM & Clusterware

Jul 29

Deploying a highly available MySQL Cluster with DRBD on OCI

This tutorial walks you through the process of deploying a MySQL database to Oracle Cloud Infrastructure (OCI) by using Distributed Replicated Block Device (DRBD). DRBD is a distributed replicated storage system for the Linux platform. PS: This post was based in many other articles that I've read over internet and I adapted them for OCI. …

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Mar 10

Check which Hub Node is Leaf Node connected to in Oracle Flex Cluster

In this article, I will show how to detect to which Hub Node is your Leaf Node connected to in an Oracle Flex Cluster scenario where you have multiple Hub Servers. First of all, let's check our current scenario: [oracle@oranode3 ~]$ crsctl get node role status -all Node 'oranode1' active role is 'hub' Node 'oranode2' …

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Apr 29

"ORA-15040: diskgroup is incomplete" but diskgroup is mounted

Those days, I was creating a new database on a system and when I tried to create any file (spfile / pwfile / control file) on diskgroup, I started receiving the error below: ORA-15001: diskgroup "DATA" does not exist or is not mounted ORA-15040: diskgroup is incomplete Usually this error comes together with something like …

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Apr 16

libasmclntsh12.so missing after OPatch failed in Oracle 12c

Those days, I was trying to apply the latest Oracle Grid Infrastructure PSU over my 12.1.0.2 Clusterware. During the apply phase, the OPatch failed because the gcc was not available for execution. Actually, someone gave chmod 700 to /usr/bin/gcc for protection. /grid/app/grid/product/12.1.0/grid/bin/orald: line 31: /usr/bin/gcc: Permission denied /grid/app/grid/product/12.1.0/grid/bin/orald: line 31: exec: /usr/bin/gcc: cannot execute: Permission denied make[2]: …

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Aug 07

Setup VNCR in Oracle RAC

Enabling VNCR (Valid Node Checking for Registration) is a mandatory task that every DBA should do when terminates the configuration of a new database, being it a Single Instance or a Oracle RAC. In my opinion, Oracle should have already defined this option enabled by default on new releases. In times of TNS Poison (Oracle Security …

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