Re: ASM and RAW Devices on RHEL 4
- From: johan Eriksson <johan.eriksson@xxxxxxxxxxxx>
- To: exriscer@xxxxxxxxx
- Date: Tue, 07 Mar 2006 11:13:02 +0100
On Tue, 2006-03-07 at 10:54 +0100, LiShan Cheng wrote:
> Hi
>
> I am going to install a 10gR2 RAC in a couple of weeks. It will be
> RHEL 4 Update 2 and I will be using ASM for all database files.
> However I have some doubts, I am wondering if ASMLib API gives better
> performance than Linux standard I/O API? Anyone with both ASMLib
> experience and ASM + RAW + Linux I/O API?
>
We have just installed this combination but I haven't tested the
performance yet.
One test is at http://www.linuxjournal.com/article/8539
> I also read this note, Note:357492.1, Linux 2.6 kernel deprecation of
> raw devices. I was planning to use RAW Devices for the voting disk and
> OCR files. If raw devices are deprecated does it mean I must use
> OCFS2?
>
Linux 2.6 and OCFS2 aren't yet cerified so I think you have to use raw
for ocr and voting (if you care about support)
/johan
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