iscsiadm discovery: no output with Openfiler.

By | December 31st, 2010|Categories: Database, RAC|Tags: , , |

I was building my own Oracle RAC 11g cluster ( with Openfiler as my shared storage. Two VM's as my rac-cluster, one VM with Openfiler as my own SAN. Followed the instructions of the article of Jeffrey Hunter how to build a RAC on OEL and iSCSI, however this article is not based on VM. My Openfiler-VM was ready, given access to my both nodes on iSCSI-level, and now I want my rac1-node to discover the iSCSI-drives on my Openfiler.

Script for setting up ssh on RAC-nodes

By | December 30th, 2010|Categories: Database, RAC|Tags: , , |

Finished a RAC-course with instructor Harald van Breederode. Noticed that he used a script for setting up ssh on the nodes. Short, powerful.

It started with a Misscount…

By | November 7th, 2010|Categories: Database, RAC|Tags: , |

For those who are not that interested in the whole story about RAC, GFS2, the misscount-parameter and Red Hat, I’ll give you the outcome: don’t use RAC (10 or 11) with GFS2 – Red Hat Cluster Suite, it’s a dead end road. For those who are interested, you’re invited…


Oracle RAC – Troubleshooting Connectivity Issues; by Alex Gorbachev

By | February 7th, 2010|Categories: Oratube, RAC|Tags: , |

Alex as a teacher. Fits him well. Part III of the trilogy about RAC. httpvh://

Oracle RAC – VIP Configuration Mistakes; by Alex Gorbachev

By | December 20th, 2009|Categories: Oratube, RAC|Tags: , |

A video tutorial on VIPs with Oracle RAC httpvh://

Oracle RAC – Why VIPs; by Alex Gorbachev

By | December 20th, 2009|Categories: Oratube, RAC|Tags: , |

A tutorial of using VIPs with RAC, from Alex Gorbachev httpvh://

Linux-mail failed with "name service error"

By | January 26th, 2009|Categories: RAC|

And now for something quite different…. Some monitoring-scripts are  mailing to me, for example the backup-script (will do it later on in Grid Control….).  For a few nodes in the DMZ this didn’t work anymore. And actually I don’t want to know what is going on, but at the place I work there’s no Linux admin in the neighbourhood. So I can give it a try…

Appeared that the network-boys (no girls..) changed some configuration (mx-records or something like this).  Logging and “mailq” gave ‘Name service error’.

Suse 9, x64-bit.  Solution:


Hangende dbms_scheduler jobs na database down

By | November 25th, 2008|Categories: Database, RAC|

Een datawarehouse-achtige database heeft zo’n 278 scheduler_jobs lopen. Database gaat down voor onderhoud, blijft een avondje uit. Na opstarten van de database blijkt dat de next_run_date van de meeste jobs kleiner is dan de sysdate, en de jobs niets meer doen.


Monitoren van locks in een RAC-database

By | September 18th, 2007|Categories: RAC|

Monitoren van locks in een RAC-database. Dit script geeft de 'waiters' en de 'lockers' aan per instance. Veel gebruik van gemaakt.

Tonen van gebruikte raw-devices in RAC omgeving

By | September 18th, 2007|Categories: RAC|

Dit script toont de raw devices die al bezet zijn.