[oracle@test12c ~]$ pwd
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...)
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.
Running RAC? (Why? No, really, WHY? Never heard of DataGuard? With a broker?)
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...)
- Entropy pool
- Monitoring entropy
- Using /dev/urandom
- JRE – java.security
- rngd daemon
- Additional information
In computing you often need random numbers. They are used for encrypting stuff but (more...)
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...)
For my example, (more...)
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...)
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...)
LinuxCon Japan 2013 is happening next week (May 29-31) in Tokyo, and several members of the Oracle mainline Linux kernel team are speaking:
- Jeff Liu - XFS in Rapid Development
- Liu Bo - Btrfs Specific Data Deduplication
- James Morris - Recent Developments in the Linux Kernel Security Subsystem
For those (more...)
Oracle is sponsoring LinuxCon Japan 2013 (Oracle's Linux Blog)
Wednesday, May 29th, 3pm Neptune Room: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。
Recent Developments in the Linux Kernel Security Subsystem - James Morris, Oracle
LinuxCon/CloudOpen Japan: Recent Developments in the Linux Tracing...
Perf, Systemtap, and Ftrace?
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...)
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...)