Oracle Direct NFS (and Linux Routing) … for Dummies!

When I started my current role a few months ago, I was very interested to learn that direction had been set to migrate away from ASM and onto NFS storage that had some read flash cache in front of it. I'm not the world's biggest fan of ASM and the (more...)

Play: automate Start/Stop OSWBB on Linux

I installed OSWatcher on Linux and want to Start OSWatcher Black Box (OSWBB) every system boot. I suggest you download package on Oracle Support - How To Start OSWatcher Black Box (OSWBB) Every System Boot (Doc ID 580513.1). If not? You might write simple script.
Install:
[oracle@test12c ~]$ pwd
(more...)

Compressing sqlplus output using a pipe

Recently I am involved in a project which requires a lot of data to be extracted from Oracle. The size of the data was so huge that the filesystems filled up. Compressing the output (using tar j (bzip2) or z (gzip)) is an obvious solution, but this can only be (more...)

Tools that I use – nmap

For medium to large size projects the network setup can be quite complex, especially if it involves several external partners or third-party networks (VPN, MPLS etc).

Normally network changes are done by network engineers that do not have access to the servers and therefore cannot verify the changes they make.

(more...)

RACCheck

Running RAC? (Why? No, really, WHY?  Never heard of DataGuard? With a broker?)

Running RAC?
Not sure if you’ve configured it correctly?
Not sure if you have all of the recommended initialisation parameters set?
All recommended RPM’s installed?
All daemons running?
etc, etc, etc,

Well, as of Oracle 11. (more...)

WebLogic Server and entropy

After input from Jacco H. Landlust and Edwin Biemond I have rewritten my post about entropy.

Overview

Entropy pool

In computing you often need random numbers. They are used for encrypting stuff but (more...)

Bash script for installing WebLogic Server PSU patches via BSU

Patching WebLogic is necessary but not fun. To help out I have created a simple Bash script for installing CPU/PSU patches.

For information about CPU, PSU and SPU patches check this post.

The script is using BEA Smart Update so it is for WebLogic Server 12.1.1 and older. (more...)

IPython at Ohio LinuxFest 2013

Are you signed up yet for Ohio LinuxFest on Sep. 13-15? I'll be there to present

IPython for non-Pythonistas

Break out of your (bash) shell! IPython and the IPython Notebook have swept over the Python programming community, but they're not just for Python programmers - they make for high-powered shell (more...)

Configuring ODBC to MySQL from Oracle

Sometimes people want to connect to MySQL from Oracle and copy table data between the databases.  You can do that with Oracle Hetrogenous Services via ODBC.  This post will show how to create an odbc connection to your MySQL database which is the first part of this.

For my example, (more...)

oratop from MOS

This is just a pointer post to a tool which I discovered today. It is ORATOP, to monitor databases real time like top of unix flavours. It is pretty much like MOATS   (tool from Tanel Poder and Adrian Billington and RAC version by  Jagjeet Singh),   with a bit better output (more...)

Analyzing page allocation failures on Exadata

I have seen several clients who are struggling to decode page allocation failures on Exadata, in this post i will try to explain how to read the backtrace. The following is an anonymized client case where page allocation failures are leading up to a node reboot.

Jan 1 11:58:02 dm01db01  (more...)

Oracle Database 12c (12.1.0.1.0) installation on Oracle Linux 6.4

In this post, I’m installing the Oracle Database 12c Release 1 (12.1.0.1.0) software on Oracle Linux 6.4.  Only the software is being installed at this point, in preparation for a single database installation which I’ll create later on using the DBCA tool. First and foremost, before (more...)

Playing with VirtualBox, Oracle 12c (12.1.0.1) and OEL 6.4 – Part 2

We will complete our lab by installing the Oracle Database software, create a Pluggable database and take a look in the Oracle Enterprise Manager Database Express.

The steps to install and create an Oracle Database 12c are:

1 – Go to the database directory created when unzipped the 2 Oracle (more...)

Oracle Linux Kernel Developers Speaking at LinuxCon Japan 2013

| May 22, 2013

LinuxCon Japan 2013 is happening next week (May 29-31) in Tokyo, and several members of the Oracle mainline Linux kernel team are speaking:

For those (more...)

LinuxCon でのORACLE社員セッション

| May 21, 2013
LinuxCon でORACLE社員のセッションが4つあるようです。
まだ申し込めるようです。

Oracle is sponsoring LinuxCon Japan 2013 (Oracle's Linux Blog)
Wednesday, May 29th, 3pm Neptune Room:
Recent Developments in the Linux Kernel Security Subsystem - James Morris, Oracle
参考までに下記に出てくる perf はOracle LinuxでUEKカーネルでブートすれば使える状態になっています。
このブログでも過去に書きました

LinuxCon/CloudOpen Japan: Recent Developments in the Linux Tracing...
Perf, Systemtap, and Ftrace?

On Demand Webcast Replay: How To Manage Your Data Center With Oracle Virtual Networking

Learn how to improve infrastructure performance, significantly reduce costs and complexity, and simplify storage and server connectivity with Oracle Virtual Networking products. View a demonstration of the Oracle Fabric Manager and find out how the Oracle Fabric Interconnect, the core of the data center fabric solution, simplifies data center management (more...)

Ext4 filesystem workshop report by Mingming Cao

This is a contributed post from Mingming Cao, lead ext4 developer for the Oracle mainline Linux kernel team.

I attended the second ext4 workshop hosted at the third day of Linux Collaboration Summit 2013.  Participants included Google, RedHat, SuSE, Taobao, and Lustre. We had about 2-4 hours of good (more...)

Dual-Boot on UEFI PCs: Booting Ubuntu only works randomly

In my posting about using ubuntu on a Windows 9 laptop, i ended with:
But now rebooting works like expected (with Ubuntu and Windows 8).
After some more reboots and trying to start ubuntu, booting ubuntu only works randomly. Sometimes it worked after walking through BIOS/UEFI. Sometime it did (more...)

Linux and UEFI: Files, Mountpoints, Commands…

With Windows 8 secure boot is used. That means if you want to add a Linux kernel, this kernel has to be signed. After installing Ubuntu on a Windows 8 machine, here the directory listing of the /boot directory:
-rw-r--r-- 1 root root   844882 Okt  9  2012 abi-3.5.0-17-generic
(more...)

Using Ubuntu on a Windows 8 Laptop: because of UEFI more problems as expected

Today i tried to install Ubuntu on a Windows 8 Laptop. First thing: you have to use 12.04 or greater because Windows 8 uses secure boot with UEFI.

But after the first boot with a USB-stick i got:

(initramfs) Unable to find a medium containing a live file system
?? (more...)