Shared storage devices RAC

hello
I was doing Grid Infrastructure Installation for RAC in linux. Where the disk group needs to be created I changed the device discovery path to QRCL* as said in the guide that i followed. But after that the list of candidate disks went empty.
/etc/init.d.oracleasm listdisks command does not return any disks. I can't delete the disks it says they are not instantiated i also cant create them again. please help im stuck :(

Where the disk group needs to be created I changed the device discovery path to QRCL* give full path of disk in device discovery path like /dev/dsk*

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Access iphoto 08 file on shared storage device from multiple machines

I recently installed ilife 08 on both an imac and macbook. Previously (iphoto 06), both devices accessed the iphoto library on a shared storage device without any problems. After the upgrade, my imac is able to view thelibrary but my macbook (the second machine to be upgraded) no longer has access. 'Sharing' is too slow over the wireless network and doesn't represent a reasonable option.
Is anyone else experiencing this issue? Any suggestions.

Actually, neither repairing permissions or changing them with Get Info worked for me. What did work for me was deleting the empty iPhoto Library in the user folder who couldn't access the shared library, and put an alias of the shared library in that user's Pictures folder. Everything then worked as it did prior to upgrading. Thanks.

Shared Storage for RAC

Dear All,
what is the best options for shared storage system for Oracle RAC 10g R2 on windows operating system.
How to share disk in windows so that it can be available in all RAC nodes in Dynamic mode.
Need help from people who have configured RAC on windows operating system and have used shared disk option.
Regards,
Imran

In production, the only realistic options are to turn to certified SAN or NAS vendors.
The issue is simplel - even though many types of shared storage allows you to have multiple machines connected to the same disk, certified shared storage allows these machines to write to the same disk sector and block. Most storage solutions have built-in protection to stop that from happening.
For a small shop, I certainly recommend NetApp NAS.

Moving my music onto a shared storage device

Is there a way to move my music and videos off my iPod and onto shared storage while maintaining the filenames?
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Start here:
http://support.apple.com/kb/HT1386
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No Shared Storage Available (RAC Installation)

Hello Guys,
I am in process of installing RAC 10G R2 on windows 2000 operating system. Well i am going for 2 node clustering. The problem is that we dont have any shared storage system like SAN. Is it possible that we can use any other computer's HDD for stroing data files? All other files can be stored in different drives of the 2 nodes.... OR is it possible to store datafiles on these nodes?
Please guide me... and what type of storage it will be called... obviously not ASM but it would be OCFS?
Please help.
Regards,
Imran

Well we are doing it for testing purpose... when we will go for production installation then obviouly we will keep our data files on a shared storage....
I have read the document but it is not clear to me... can we keep data files on any one of the node?
Regards,
Imran

Pointing existing RAC nodes to a fresh Shared Storage discarding old one

Hi,
I have a RAC Setup with the Primary Database on Oracle 10gR2.
For this setup, there is a Physical Standby Database Setup (using DataGuard configuration) also with 30min delay.
Assume that the "Shared Storage" of the Primary DB fails completely.
In the above scenario, my plan is to refresh a "fresh" shared storage device using Physical Standby Database Setup and then "point" the RAC nodes to the new "Shared Storage".
Is this possible?
Simply put, how can I refresh the Primary database using the Standby Database?
Please help with the utilities (RMAN, DatGuard, other non-Oracle products etc.) that can be used to do this.
Regards

Does following Shared Device configuration is fine for 10g RAC on Windows 2003?
. 1 SCSI drive
• Two PCI network adapters on each node in the cluster.
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regard.

Shared Storage RAC

Hello,
This is my Oracle RAC 11gR2 real world installation, I need to configure the shared storage for RAC 2 nodes on redhat enterprise linux 5.
could please send me a step by step how to do it? I want to use Device Mapper Multipath for that and ASM for Storage.
Thank you

899660 wrote:
Hello,
This is my Oracle RAC 11gR2 real world installation, I need to configure the shared storage for RAC 2 nodes on redhat enterprise linux 5.
could please send me a step by step how to do it? I want to use Device Mapper Multipath for that and ASM for Storage.
Thank youHi,
Shared storage is a hardware device, which cant be created by you. Ofcourse you can use that shared device to configure ASM.
Check the below links
http://martincarstenbach.wordpress.com/2010/11/16/configuration-device-mapper-multipath-on-oel5-update-5/
http://www.oracle.com/technetwork/database/device-mapper-udev-crs-asm.pdf

RAC shared storage

Hi,
I am trying to build a two-node RAC on windows 2003. I have two nodes, RAC1 and RAC2. I have completed the network configuration and now intend to implement shared storage. On RAC1, i have two hard disks.
Is it possible if I create 5 logial partitions on one disk with out formatting and without any drive letter, and consider it a shared storage?
Please guide in this regard.
regards,

Does following Shared Device configuration is fine for 10g RAC on Windows 2003?
. 1 SCSI drive
• Two PCI network adapters on each node in the cluster.
• Storage cables to attach the shared storage device to all computers.
regard.

Cheap shared storage for test RAC

Hi All,
Is there cheap shared storage device is available to create test environment RAC. I used to create RAC with vmware but environment is not much stable.
Regards

Two options:
The Oracle VM templates can be used to build clusters of any number of nodes using Oracle Database 11g Release 2, which includes Oracle 11g Rel. 2 Clusterware, Oracle 11g Rel. 2 Database, and Oracle Automatic Storage Management (ASM) 11g Rel. 2, patched to the latest, recommended patches.
This is supported for Production.
http://www.oracle.com/technetwork/server-storage/vm/rac-template-11grel2-166623.html
Learn how to set up and configure an Oracle RAC 11g Release 2 development cluster on Oracle Linux for less than US$2,700.
The information in this guide below is not validated by Oracle, is not supported by Oracle, and should only be used at your own risk; it is for educational purposes only.
http://www.oracle.com/technetwork/articles/hunter-rac11gr2-iscsi-088677.html
Regards,
Levi Pereira
Edited by: Levi Pereira on Dec 10, 2012 10:59 AM

Is it possible to install Oracle RAC without shared storage

Dear All,
I would like to seek for your advice.
I got two different servers. We call it node 1 and node 2. And two different instances name.
Node 1 -> instance name as "ORCL1"
Node 2 -> instance name as "ORCL2"
For the system we need Oracle RAC active-active cluster mode. Our objective is to have 2 replicated databases, in other words we need 2 instances of the same database automatically replicated for 100% up time to the Application server. We have 2 separate database machines and 2 application server machines. We need our application server to connect to any of the databases at any point of time and be having a consistent data on both database machines. We only need the database to be in a cluster mode, we won't need the OS to be in a cluster. There is no shared storage in this case.
Can this be done? Please advice.

you should review RAC concepts, and the meaning of instance and database
For the system we need Oracle RAC active-active cluster mode.RAC = single database with multiple instances all accessing the same shared storage, no replication involved
Our objective is to have 2 replicated databases, in other words we need 2 instances of the same database automatically replicated for 100% up time to the Application server.what you describe here is = multiple databases with multiple instances, replicated between each other
We have 2 separate database machines and 2 application server machines. We need our application server to connect to any of the databases at any point of time and be having a consistent data on both database machines. We only need the database to be in a cluster mode, we won't need the OS to be in a cluster. There is no shared storage in this case.no shared storage = no RAC
you will have two seperate databases synchronizing continuously
you can use for example Streams / Advanced Replication (with multi-master configuration)
if you dont insist on an active-active configuration, you can also use Data Guard for building a standby database

Firewire storage for RAC

DB Version: 11.2.0.2
OS : Solaris 5.10
We are thinking of setting up a RAC db(Development) with a Firewire 800 device as our Shared storage. We are thinking of buying a 2 port Firewire Storage device mentioned in the below URL along with 2 firewire PCI cards for both of our machines.
http://www.lacie.com/asia/products/product.htm?id=10330
I have read in other OTN posts that RAC with firewire storage is only good for Demo purpose. Does this mean that it is not good for development DBs at least?

T.Boyd wrote:
DB Version: 11.2.0.2
OS : Solaris 5.10
We are thinking of setting up a RAC db(Development) with a Firewire 800 device as our Shared storage. We are thinking of buying a 2 port Firewire Storage device mentioned in the below URL along with 2 firewire PCI cards for both of our machines.
http://www.lacie.com/asia/products/product.htm?id=10330
I have read in other OTN posts that RAC with firewire storage is only good for Demo purpose. Does this mean that it is not good for development DBs at least?Oracle "supports" this in a pure development environment. There is (or was) an Oracle owned mailing list that specifically dealt with this - using firewire shared storage for RAC.
Some years ago I tried it (with a Lacie drive). But could not get both RHEL3 servers to open a connection to the drive. The config was correct, but the 2nd server always failed to establish a connection (complaining something like that no more connections were supported to the drive). I put that one down as a driver bug of sorts - and were not keen to go bug hunting and build the driver from source code. Left it at that - but according to the docs I read (from Oracle) at the time, this was a "valid" config for testing RAC.

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

Vmware shared storage

Hello,
I have downloaded the Oracle/VMWare/SuSE and have exercised the databases, etc. However, I would now like to take this to the next step and create a 'sibling' virtual machine - which I would just make as a copy of the first and have the instances O10G1 and O10G2 on each of the two virtual machines, respectively. Finally, I would then like to create a shared storage device between the two virtual machines. I have had great difficulty doing this and have found disagreement on other forums whether this is even possible with vmware 4.5. The most promising post I found: ( http://www.vmware.com/community/thread.jspa?forumID=19&threadID=11257&messageID=109257#109257 ) references a document from Oracle Japan ( http://otndnld.oracle.co.jp/products/database/oracle10g/pdf/RAC_Config_VMWareLinux.pdf ). Is this document also on the Oracle USA site? It seems to have the answers I am seeking. If not, can you offer any guidance?
Thanks!
Brandon Moore

The kit provided is not ment to be used in this way, your request for help is outside the scope of this forum.
It's a bit complicated to do what you want. I would simply suggest you use NFS or iscsi on external storage that would eliminate any VMware issues with shared storage.
good luck.
Saar.

Backup Exec 9.2 SSO (shared storage option) SCSI LTO

Greetings, all...
I have a 2-node cluster setup at a particular client. Backup Exec is licensed for SSO, and unfortunately, while I have the HP Ultrium 960 in the middle of a shared SCSI bus between the two servers, because it's not on the SAN, Backup Exec apparently refuses to recognize it as a valid shared storage device.
I was wondering if anyone has been able to get around this in Backup Exec, as the drive is indeed shared (can be seen) by both servers. When using a clustered setup, but without SSO, it is difficult to keep the media management in sync, as each node is given its own subdirectory instead of sharing the media management db.
TIA

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Acessing shared storage

For some reason I just cannot access the shared storage device on my home network. The device appears as a media device, but not as a computer as it normally does. I have tried every kind of troubleshooting, but nothing seems to work.

Hi,
If the issue did not occur before, you may try to use the system restore, return to the point which did not appear the problem.
Please try the following:
1. Check the permission settings of the network storage device: Add Everyone to Sharing tab and Security tab
2. Adjust "File sharing connections” encryption setting:
a. Go to “Control Panel\Network and Internet\Network and Sharing Center\Advanced sharing settings”.
b. Adjust the File sharing connections setting and check if the computer can access the network storage device.
3. Please temporarily disable Windows Firewall and security software.
4. Try to manually use UNC (\\server\share) and IP (\\ip.add.res.s\share) to access the device for a test.
Please also use Device Manager to verify that your network adapter is working correctly and reinstall the drivers.
If the shared folder still can’t be accessed, please re-create the connection and check the result again.
Hope it helps.
Regards,
Blair Deng
Blair Deng
TechNet Community Support

Shared storage devices RAC

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