Month: May 2006

OCFS2…

I’m nearing the end of my “I wonder what RAC is like on other platforms?” phase. I ran through a basic setup of a cluster file system using OCFS2, just to prove it worked:

OCFS2 On Linux

As I say in the article, the only reason to use it as far as I can see is to provide a shared location or UTL_FILE and external table operations. I can’t see the point in using it for the OCR location or voting disk as raw devices work fine and it’s not recommended for sharing datafiles…

I guess it’s nice to know it’s there if I ever need it 🙂

Cheers

Tim…

ASM with ASMLib or Raw Devices?

I’ve been trying to figure out if it’s better to run ASM on Linux using ASMLib or raw devices. Some of the Oracle documentation claims ASMLib gives better performance that raw devices with 10g Release 2, while other sources claim it only affects candidate disk discovery time…

Whilst setting up a test I wrote this article:

ASM using ASMLib and Raw Devices

I’m sure the configuration information will be useful to others, but my first performance test only convinced me that using VMware on my kit at home is pointless for performance tests. You don’t say!!! 🙂

Cheers

Tim…