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Operation systems

Oracle Team

Oracle Grid Infrastructure 12c: Binaries installation

By | Operation systems | One Comment

In a previous article, I have shown how to configure two servers in order to deploy a two-nodes 12c cluster. This time, I am going to describe the Grid Infrastructure 12c installation process using Oracle Universal Installer (OUI). We assume that cluvfy tool has returned no errors (see previous blog). Install Grid Infrastructure Connect as grid and launch the Oracle Universal Installer (OUI) from /software/grid: $ /software/grid/runInstaller.sh Starting Oracle Universal Installer… Checking Temp space: must…

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Oracle Team

Oracle Grid Infrastructure 12c: prerequisites for installation

By | Operation systems | 8 Comments

Grid infrastructure 12c has recently been released. In this posting, I will show that the installation prerequisites are quite similar between Grid Infrastructure 11g and 12c. We will see parts of them during a review for the deployment of Grid Infrastructure on a two nodes RAC database cluster. Server hardware requirements Let’s see the hardware part. Grid infrastructure 12.1 Grid infrastructure 11.2 Minimal size for /tmp 1 GB 1 GB Minimal size for Grid infrastructure…

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Oracle Team

Oracle Database 12c: Grid Infrastructure, quoi de neuf?

By | Operation systems | One Comment

A la lecture du New Features Guide, on trouve dans le chapitre sur Grid Infrastructure beaucoup de nouvelles fonctionnalités pour Grid Infrastructure, ASM et ACFS, mais l’événement est l’annonce d’une grosse évolution dans l’architecture du cluster. Flex Cluster En effet, cette version 12c introduit une nouvelle architecture nommée Flex Cluster dont voici un aperçu: Schema Oracle documentation Les objectifs annoncés sont “évolutivité, flexibilité et facilité de gestion”. Ainsi, nous pourrons choisir l’organisation “topologie” de notre…

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Oracle Team

Oracle RAC 11.2.0.2: A disturbing loop in a “ohasd” startup script

By | Operation systems | No Comments

Last February, I performed an operating system rolling upgrade on a four-nodes RAC cluster (11.2.0.2). I then faced a strange problem when restarting the operating system… The first step of the procedure was to stop all Grid Infrastructure and Database services running on the first node as well as to disable Cluster and ASM autostart. The following command is supposed to prevent Oracle High Availability Service (OHAS) to be run at operating system startup: #…

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Middleware Team

Boot sequence for all Linux-based operating systems

By | Operation systems | No Comments

In this bog posting, I will present a boot sequence that works for all Linux-based operating systems – from switching on the power to the login screen.   7 steps There are 7 steps for Linux startup: Power on Obviously, first of all, you have to switch on your computer, then: Each sub process will execute the following one It is the same process for all Linux distributions Close to BSD and Unix style from…

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Oracle Team

Oracle Database Appliance: new ODA X3-2 architecture

By | Operation systems | No Comments

A few weeks ago, I posted an article about Oracle Database Appliance, focusing on ODA version 2.5.0.0.0. However, a new update of ODA, version 2.5.5.0.0, was released by Oracle on 5 March. This posting will focus on the new ODA release, which leads to a new hardware architecture. So, what’s new with this new ODA version? According to the Release Notes, ODA now supports the new X3-2 architecture which allows additional hardware and storage capabilities. Physical…

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Oracle Team

Oracle Database Appliance (ODA) – an overview

By | Operation systems | No Comments

Last february, I had the chance to attend an Oracle presentation about ODA: Oracle Database Appliance. I found it interessant to share what I have learned about this technology. Which, I confess, convinced me. Summary Before developing the software and hardware components, here is a small overview of ODA. ODA is an all in one solution providing Hardware, Operating System, and database components. It comes in a 4U rack server form, composed of two distinct…

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Overview of Oracle Linux releases and kernels

By | Operation systems | 2 Comments

As everybody knows, Linux regroups several operating system families. The most popular Linux OS are Debian, Red Hat, or Suse. But each family has many derived Linux distributions. In November 2006, Oracle released the first version of its operating system, totally based on Red Hat Enterprise Linux: Enterprise Linux. Up to release 5, the system came with two kernels: A customized kernel with bug fixes, based on Red Hat kernel, installed and started by default…

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Oracle Team

Unable to resize tmpfs on Oracle Enterprise Linux 6 versions

By | Operation systems | 4 Comments

I recently helped to create a lab dedicated to a training about Oracle backup and recovery, with Oracle 11g databases. While creating several databases on an Oracle Enterprise Linux 6.1, I wanted to resize the tmpfs to allocate more memory to the databases for AMM (Automatic Memory Management). That was a small challenge 🙂 … By default, the value of the tmpfs is the half of the installed memory. So, on my 3 GB memory…

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