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Kfed and Exadata ASM disks
I’ve written in the past on the usefulness of kfed. As Martin Berger requested seeing some output from kfed with Exadata disks I thought I would oblige. So What is kfed kfed is the so called Kernel...
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Exadata Batteries
Andy Colvin has a good post highlighting the importance of making sure your batteries are operating with enough charge to ensure that the drive policy is in writeback as opposed to writethrough. I just...
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Exadata Flash Storage
Exadata flash storage is provided by the Sun Flash Accelerator F20 PCIe card shown above. Four of these cards are installed in every Exadata storage cell. There is a Documentation set available to...
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Exadata Smart Flash Logging
With the 11.2.2.4.0 release of the Exadata storage server software (and providing you are at least at 11.2.0.2 BP11), you will have the opportunity to utilise Exadata Smart Flash Logging. I thought I’d...
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UKOUG Exa Day
Had a great day at the UKOUG Exa.. Day yesterday. I was happy by and large with how my presentation went, it was a bit irritating having some technical issues with laptops and projectors, but hopefully...
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Creating ASM diskgroups on Exadata with ASMCA
I recently had the chance to create some diskgroups on an Exadata box outside the standard installation procedure, while this is not necessarily Exadata specific, I thought the technique of using ASMCA...
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Adding Columns and Exadata HCC compression
While everyone is aware of the issues of mixing EHCC compression and OLTP type activities, I had a customer who was interested in finding out what happens upon adding a column to a table that has EHCC...
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Observing Exadata HCC compression changes when adding columns
This blog posting is very much a follow on from the previous entry on how data compressed with Exadata HCC compression behaves under changing table definitions. Many thanks to Greg Rahn for the...
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Online patching: The Good, the Bad, and the Ugly
I’ve worked on 24×7 systems for more than a decade, and I have a real dislike of downtime. For one, it can be a real pain to agree any downtime with the business, and while RAC can and does help when...
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Recovering from rm -rf on a datafile
This blog posting is entirely the credit of Frits Hoogland, who pointed out to me that this was possible. I managed to delete a datafile, that while it had been created in a completely stupid location,...
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Cloning Oracle 12c Pluggable Databases
The wait is over and Oracle 12c has finally arrived. Of course there is a lot of interesting and useful looking new features, but one of the eye-catchers is the major architectural shift to...
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OpenWorld 2013
I’ve just come back from my 5th trip to Oracle OpenWorld. While there is something very special about your first trip to OpenWorld, this has been my favourite trip of the lot. In previous years I’ve...
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VritualBox 4.30 on OS X 10.9 Mavericks
I’ve been using OS X for a very long time, and one of the Applications that is invaluable in my day to day work is VirtualBox. It’s a great application allowing you to work with various Oracle versions...
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Thoughts on UKOUG tech 13
So the annual UKOUG technology conference has come and gone for yet another year. This time it was in a new location, having moved away from its regular berth in Birmingham. Manchester is not a city...
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Oracle ASM 12c: New Features
Last week I was lucky enough to be presenting at the UKOUG AIM SIG. There was a decent enough crowd in attendance and there were some really interesting talks and some really good speakers. In...
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