Operating systems

Configure AFD with Grid Infrastructure software (SIHA & CRS) from very beginning.

Introduction : Oracle ASM Filter Driver (Oracle ASMFD) simplifies the configuration and management of disk devices by eliminating the need to rebind disk devices used with Oracle ASM each time the system is restarted. Oracle ASM Filter Driver (Oracle(…)

Kernel panic – not syncing: Out of memory and no killable processes

By Franck Pachot . This is a quick post to give a solution (maybe not the best one as this was just quick troubleshooting) if, at boot, you see something like: Trying to allocate 1041 pages for VMLINUZ [Linux=EFI, setup=0x111f,(…)

Automate OVM deployment for a production ready Oracle RAC 12.2 architecture – (part 02)

In this post we are going to deploy a R.A.C system ready to run production load with near-zero knowledge with R.A.C, Oracle cluster nor Oracle database. We are going to use the “Deploy Cluster Tool” which is provide by Oracle(…)

Automate OVM deployment for a production ready Oracle RAC 12.2 architecture – (part 01)

After having worked with OVM on various architectures I can say that it is a good technology to easily build virtualized environments for production applications. Because it is based on XEN and has simple ways to deal with existing storage(…)

Oracle Linux 7 – How to audit changes to a trusted file such as /etc/passwd or /etc/shadow

Linux auditing is quite powerful and a lot of different use cases might be handled via the auditing framework. However, in this blog I would like to show you, how to audit changes on trusted files, like /etc/passwd or /etc/shadow.

ODA – 32GB template but got a database with 16GB SGA???

I got an interesting question today from a customer which created a database on ODA. He selected the template odb-04 which shows 32GB Memory but got a database with a 16GB SGA… Is it due to the PGA size, a(…)

OEL 7 – How to disable IPv6 on Oracle Linux 7 – Follow Up

By William Sescu This is a follow up to the Blog were I explained how to disable IPv6 on Oracle Linux 7. If you have done all the steps which I have explained here http://dbi-services.com/blog/oel-7-how-to-disable-ipv6-on-oracle-linux-7/  then you have already(…)

Linux – Securing your important files with XFS extendend attributes

By William Sescu Let’s say, the tnsnames.ora is a quite important file on your system, and you want to make sure that you notice when someone changes the file. Taking a look at the modification time of that file would(…)

vagrant up – get your Oracle infrastructure up an running

By using Vagrant to manage your Virtual Machines and Ansible for configuration management and provisioning you can easily automate the setup of your whole test environment in a standardized way. If you have never heard about Ansible and Vagrant(…)

Dealing with WSFC 2016 quarantine state and availability groups

I was playing with my lab environment which includes Windows 2016 and SQL Server 2016 and I noticed an interesting scenario while testing cluster node failures. After simulating some network outage scenarios, I was not able to(…)