Shared disks for clusterware

Hi:
I am setting up Oracle Clusterware. I am trying to set it up on two nodes. This i on AIX and trying the latest version 11gR2. I am selecting the first option ( Install and Configure Grid Infrastructure for a Cluster)
I am trying to setup shared disk by mounting a file system of one system on the other using NFS.
Here are my questions.
I am creating user "oracle" on both the boxes. I am adding all the groups (like dba, oinstall etc.)
Here are my questions:
The NFS mount I have which is accessible by both the boxes should be used only for OCR (Oracle Cluster Registry) and Voting Disk (CF). I do not have ASM.
Is it correct?
Also
The Oracle Base(eg : /u01/app/grid ) and Software Location(eg : /u01/app/11.2.0/grid) can be local to each individual nodes
Is it correct?
Those are the two questions I have. Also, will this work?
I have tried to put everything on the shared disk (installation files, OCR, CF, base, inventory etc) but looks like the second box (the one from where I have not installed) is having problem. Because it is trying to change ownership of user and group of a few files when I run orainstRoot.sh and root.sh.
Please let me know
Thanks

Hi,
The NFS mount I have which is accessible by both the boxes should be used only for OCR (Oracle Cluster Registry) and Voting Disk (CF). I do not have ASM.
Is it correct?Use documentation of Oracle GI 11.2
http://docs.oracle.com/cd/E11882_01/install.112/e24614/storage.htm#CDEJIDFB
Why not use ASM? Since is more safe and have more performance.
Also
The Oracle Base(eg : /u01/app/grid ) and Software Location(eg : /u01/app/11.2.0/grid) can be local to each individual nodes
Is it correct?
Those are the two questions I have. Also, will this work?For grid infrastructure for a cluster installations, the Grid home must not be placed under one of the Oracle base directories, or under Oracle home directories of Oracle Database installation owners, or in the home directory of an installation owner. During installation, ownership of the path to the Grid home is changed to root. This change causes permission errors for other installations.
http://docs.oracle.com/cd/E11882_01/install.112/e24614/preaix.htm#BABFCFIH
Please follow the installation guide, all your question here is easily answered on documentation:
http://docs.oracle.com/cd/E11882_01/install.112/e24614/preaix.htm
Regards,
Levi Pereira

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Shared Disks For RAC

Hi,
I plan to use shared disks to create Oracle RAC using ASM. What options do I have? OCFS2? or any other option?
Can some one lead me to a documnet on how can I use the shared disks for RAC?
Thanks.

javed555 wrote:
I plan to use shared disks to create Oracle RAC using ASM. What options do I have? You have two options:
1. Create shared virtual, i.e. file-backed disks. These files will be stored in /OVS/sharedDisk/ and made available to each guest
2. Expose physical devices directly to each guest, e.g. an LVM partition or a multipath LUN.
With both options, the disks show up as devices in the guests and you would then provision them with ASM, exactly the same way as if your RAC nodes were physical.
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Doubts about shared disk for RAC

Hi All,
I am really new to RAC.Even after reading various documents,I still have many doubts regarding shared storage and file systems needed for RAC.
1.Clusterware has to be installed on a shared file system like OCFS2.Which type of hard drive is required to install OCFS2 so that it can be accessed from all nodes??
It has to be an external hard drive???Or we can use any simple hard disk for shared storage??
If we use external hard drive then does it need to be connected to a seperate server alltogether or can it be connected to any one of the nodes in the cluster???
Apart from this shared drives,approximately what size of hard disk is required for all nodes(for just a testing environment).
Sincerely appreciate a reply!!
Thanks in advance.

Clusterware has to be installed on shared storage. RAC also requires shared storage for the database.
Shared storage can be managed via many methods.
1. Some sites using Linux or UNIX-based OSes choose to use RAW disk devices. This method is not frequently used due to the unpleasant management overhead and long-term manageability for RAW devices.
2. Many sites use cluster filesystems. On Linux and Windows, Oracle offers OCFS2 as one (free) cluster filesystem. Other vendors also offer add-on products for some OSes that provide supported cluster filesystems (like GFS, GPFS, VxFS, and others). Supported cluster filesystems may be used for Clusterware files (OCR and voting disks) as well as database files. Check Metalink for a list of supported cluster filesystems.
3. ASM can be used to manage shared storage used for database files. Unfortunately, due to architecture decisions made by Oracle, ASM cannot currently be used for Clusterware files (OCR and voting disks). It is relatively common to see ASM used for DB files and either RAW or a cluster filesystem used for Clusterware files. In other words, ASM and cluster filesystems and RAW are not mutually exclusive.
As for hardware--I have not seen any hardware capable of easily connecting multiple servers to internal storage. So, shared storage is always (in my experience) housed externally. You can find some articles on OTN and other sites (search Google for them) that use firewire drives or a third computer running openfiler to provide the shared storage in test environments. In production environments, SAN devices are commonly employed to provide concurrent access to storage from multiple servers.
Hope this helps!
Message was edited by:
Dan_Norris

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Thanks for the reply. Actually, design is not my decision unfortunately.
I have gone ahead with a disk witness and I have used Shared VHDX as a Quorum Disk. I faced some issues when I live migrated, but when I enabled Guest Services on both nodes which is disabled by default, it started migrating fine.
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This link might help you in what you are looking for.
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Folks,
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Message was edited by: Topher Kessler

Shared disk for weblogic cluster

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Could somebody explain,
Is it possible/certified to create weblogic domain on a clustered file system (i.e. OCFS2)?
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Hi Saurabh,
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http://www.tangosol.com/coherence.jsp
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"Saurabh" <[email protected]> wrote in message
news:3ed7741f$[email protected]..
>

How to make iTunes watch a shared disk for new music?

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Use storage as shared disk

We have storage connected to one server using optic port.Can i make shared disk for future install Oracle Clusterware(for 2 node).thanx

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Hi,
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Duane wrote:
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Hi Duane,
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Disabled.
- pi
Message was edited by: Patrick Inhofer

Mapping shared disk mount in Linux

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I want to install RAC database (oracle 10g on RHEL5). Now we are configurind shared storage for the both servers (nodes). In disk configuration (SAN on EVA 4400) we have created the volume group for the disk to use for ASM and present the disk group to the servers. Actually when we check the server we cannot see the disk (shared storage).
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/dev/cciss/:
total 0
brw-r----- 1 root disk 104, 0 Jul 1 2009 c0d0
brw-r----- 1 root disk 104, 1 Jul 1 14:29 c0d0p1
brw-r----- 1 root disk 104, 2 Jul 1 14:29 c0d0p2
brw-r----- 1 root disk 104, 3 Jul 1 14:29 c0d0p3
brw-r----- 1 root disk 104, 4 Jul 1 2009 c0d0p4
brw-r----- 1 root disk 104, 5 Jul 1 14:29 c0d0p5
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Raitsarevo

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ocr_partition (25 Gb) : for OCR
vote_partition (25 Gb): for Voting disk
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oradata_part2 (150 Gb): for database (ASM)
oradata_part3 (150 Gb): for database (ASM)
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Lucienot

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Hi,
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HT1198 I shared disk space and my iPhoto library as described in this article. When creating the disk image, I thought I had set aside enough space to allow for growth (50G). I'm running out of space. What's the best way to increase the disk image size?

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Shared disks for clusterware

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