Comments on: OCFS2… http://www.oracle-base.com/blog/2006/05/03/ocfs2/?utm_source=rss&utm_medium=rss&utm_campaign=ocfs2 Oracle related rants (and lots of off-topic stuff)... Tue, 21 May 2013 22:00:54 +0000 hourly 1 http://wordpress.org/?v=3.5.1 By: Tim... http://www.oracle-base.com/blog/2006/05/03/ocfs2/comment-page-1/#comment-146184 Tim... Wed, 04 May 2011 07:48:01 +0000 http://www.oracle-base.com/blog/?p=203#comment-146184 Hi.

OCFS2 and RAC on a single system is a *complete* disaster. Why? Because they are competing clustering solutions. They have no knowledge of each other and will interfere with each other. Sometimes OCFS2 will have a problems and force a node restart when Clusterware is happy, and vice versa. In my opinion, they should never be used together.

Why not use an NFS mount for the location? It’s sharable and allows you to use regular files, which seems to be what you want.

Cheers

Tim…

]]> By: Hyun Kwon http://www.oracle-base.com/blog/2006/05/03/ocfs2/comment-page-1/#comment-146134 Hyun Kwon Tue, 03 May 2011 20:28:16 +0000 http://www.oracle-base.com/blog/?p=203#comment-146134 I am building 11gR2 RAC using ASM on Linux servers. Being EMC data domain(DD) our primary backup storage, there are a few options to take in terms of FRA and ASM. One easy option is define FRA on ASM as Oracle recommends. But in that case as database is backed to FRA/ASM, DD cannot be used. 2nd option is to backup database into DD, non-FRA area, which is not a great idea. 3rd option is define FRA on a cluster file system such as GFS, ACFS, OCFS2, etc and softlink FRA backup directory to NFS mounted DD directory. It sounds complicated but, we use FRA and have backup on DD. The problem is that ACFS is dropped because it is not supported for database files (control files, archivelog files, redo log files which are placed in FRA). GFS is dropped as it requires another redhat clusterware. OCFS2 is the only option for now. My only concern is Oracle’s future strategy.

]]> By: Tim... http://www.oracle-base.com/blog/2006/05/03/ocfs2/comment-page-1/#comment-128902 Tim... Mon, 04 Oct 2010 12:40:42 +0000 http://www.oracle-base.com/blog/?p=203#comment-128902 Hi.

Please don;t use OCFS2 and RAC together. They are two different clustering frameworks. As a result, they often trip each other up. Personally I would avoid combining at all costs. Use an NFS mount for shared disks, or if you are using 11gR2 use ACFS.

Cheers

Tim…

]]> By: Ganesh http://www.oracle-base.com/blog/2006/05/03/ocfs2/comment-page-1/#comment-128899 Ganesh Mon, 04 Oct 2010 12:08:04 +0000 http://www.oracle-base.com/blog/?p=203#comment-128899 Hi,
In my opinion, ASM adds the manageability advantage over the performance advantage of raw file systems. Online space management is one important feature to consider.
But in our RAC setup, we are exploring possibilities of adding OCFS2 along with ASM, the primary reason being, the tape library that we use cannot read the backups directly from ASM. RMAN would be better off using OCFS2 so that the downstream backup possibilities are much wider and easier from an OCFS2 filesystem to other devices/systems.

-Ganesh

]]> By: Jack Yoon http://www.oracle-base.com/blog/2006/05/03/ocfs2/comment-page-1/#comment-103516 Jack Yoon Thu, 05 Feb 2009 00:56:51 +0000 http://www.oracle-base.com/blog/?p=203#comment-103516 I know that oracle pushes ASM rather than ocfs2 but I think that this may not be a good decision and at the end oracle will loose lots of client to veritas cfs.

Ocfs2 has it’s own strong point on top of ASM like easy of use. Specially, company which need database cloned regular bases between production and QA system need to asign extra staging area to take backset out of ASM volume before the transfer. And so far ASM provide very limited functions for this kinds of scenarios.

So, I hope that oracle enhance their ASM to provide better interaction to the outside of ASM and also between the ASM on both local and remote servers.

]]> By: Karl Arao http://www.oracle-base.com/blog/2006/05/03/ocfs2/comment-page-1/#comment-102502 Karl Arao Thu, 15 Jan 2009 23:57:47 +0000 http://www.oracle-base.com/blog/?p=203#comment-102502 I’ll use OCFS2 for my ocr and voting disk, as well as for my flash recovery area..

]]> By: Tim... http://www.oracle-base.com/blog/2006/05/03/ocfs2/comment-page-1/#comment-97459 Tim... Sat, 27 Sep 2008 17:09:22 +0000 http://www.oracle-base.com/blog/?p=203#comment-97459 Hi.

OCFS2 is fine. Remember also, that in 11gR2 you will be able to store OCR configuration and voting disks in ASM, so you don’t have to use RAW or OCFS2.

Cheers

Tim…

]]> By: MVE http://www.oracle-base.com/blog/2006/05/03/ocfs2/comment-page-1/#comment-97439 MVE Sat, 27 Sep 2008 01:07:46 +0000 http://www.oracle-base.com/blog/?p=203#comment-97439 Tim,

What are your thoughts on putting OCR/Voting onto OCFS2 instead of RAW? Considering that RAW devices are being depreciated by ORACLE:

From Oracle RDBMS version 10.2.0.2.0 and higher, block devices can be
accessed via any of the following methods and utilized by the RDBMS:

* Direct block device access
* ASMLib mapped devices
* OCFS2 devices
* LVM2 mapped devices (single instance only)”

REFERENCE:
Note:357492.1 Linux 2.6 Kernel Deprecation Of Raw Devices

Thanks

]]> By: Tim... http://www.oracle-base.com/blog/2006/05/03/ocfs2/comment-page-1/#comment-94259 Tim... Wed, 28 May 2008 09:43:22 +0000 http://www.oracle-base.com/blog/?p=203#comment-94259 Hi.

ASM just isn’t designed for that. It’s only designed to hold database files. Follow this link and you’ll see a table of supported storage solutions:

http://download.oracle.com/docs/cd/B28359_01/install.111/b28263/storage.htm#BABHIJDF

As you can see, ASM is not supported for OCR, voting disk or software installations.

Cheers

Tim…

]]> By: david http://www.oracle-base.com/blog/2006/05/03/ocfs2/comment-page-1/#comment-94258 david Wed, 28 May 2008 08:58:53 +0000 http://www.oracle-base.com/blog/?p=203#comment-94258 Tim ya but i want to know that why cant we go for ASM for storing those two files rather why we go for others

And with ur ans cant we install ASM before we install the cluster ware if so why cant we ?

plz explain me brief i am really in need of that

]]>