Shared storage setup for 'RAC' env

Hi All ;
Good Morning !
My vmware machine version is : 10.
Could you please share how do we configure shared storage setup in vmware ?

Did you even tried :https://www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=oracle%2Brac%2Bvmware%2Bworkstation+

Similar Messages

Question about a file system storage option for RAC on 10g

Hello everyone,
I am in the beginning of connecting our storage and switches, and building RAC on them but there is a little argument between our specialists.
We have two database servers(10g with OEL 5) to be clustered and two visible disk groups to each of those nodes. So question is can we choose only one disk group as a shared storage leaving the rest one as the redundant copy during database a creation window while installing the database. Because some of us argue that oracle database has a built-in capability to decide on what level of RAID we store our data.
Thank you for your help.

"some of us argue that oracle database has a built-in capability to decide on what level of RAID we store our data".
That statement is not true. Oracle has optional multiplexing for control files, redo logs, and archive logs but this is not enabled by default and Oracle will not automatically enable it. If you want redundancy of tables, indexes, temp, and undo you must provide this because Oracle does not offer it standard or as an option. You can achieve redundancy with RAID at the array level, or host based mirroring (like ASM redundancy groups or Linux mdadm). This can also depend on your file system because, I think, OCFS2 does not support host based mirroring (so you cannot use mdadm or lvm to mirror the storage if you are using OCFS2).
Redundancy is not required, but it is recommended if you are using hard disks because they are prone to failures. You can configure RAID 10 across all disks in the array and present this as one big LUN to the database server. If you have two storage arrays and you want to mirror the data across the two arrays, then present all of the devices as JBOD and use Linux mdadm to create your RAID group.
RAC requires shared storage. Maybe you have a NAS or SAN device, and you will present LUNs to the Oracle database servers. That is no problem. The problem is making those LUNs usable by Oracle RAC. When I used Oracle 10g RAC, I used the Linux raw device facility to manage these LUNs and make them ready for Oracle RAC. However, raw has been desupported. Today I would use either ASM or OCFS2. This has nothing to do with redundancy, this is just because you are using RAC.

Oracle White Paper- Storage Option for RAC. on Linux

hi..
This in reference with White Paper.. Stotage Option for RAC on LINUX. Author- Umadevi Byrappa.
Which states on page 10: To Use NAS for RAC database file storage select the file system storage option in OUI. or the Clustered file system storage option in DBCA.
With which i disagree. File storage option of oracle 10g RAC only shows.
1. Clustered File system.
2. ASM
3. Raw Devices.
When i try to select Cfs and select the shared directory on NFS it says. < Directory_Name> is not a clustered file system or Shared on Both <Server_1> < Server_2>. and at this point of time i m stuck.
1. I dont want to use OCFS as its not supporting NAS.
2. Selecting CFS doesnt recognise mounted shared volume as valid storage device option can only store OCRfile and CSS file.
3. So, I have to use ASM.. with zero padded files..which i dont want to because no other option. ( PART NO. B10766-02 PAGE C-6)
Also, I would like oracle to provide Back up Recovery Option or Document which tells me how could i Recover Database when i use Zero Padded Files.
What would be the best Option in the above scenario ?
I hope by applying patch or with workaround somehow it shows Filesystem ONLY.I'll be the happiest man in this Case.
Any suggestions and corrections are most welcome. I wish i m wrong.
Nadeem ( [email protected] )

NFS isn't a clustered file system at all - by RFC it is an exported file system with access controls
If your vendor offers an NFS solution over and beyond that - more power to them. However that isn't "NFS"..
http://www.faqs.org/rfcs/rfc3010.html
You can use NFS in a clustered server environment (to mount apps, read only data and for synchronous access to files), however it doesn't support the concurrency out of the box for RDBMS transactions - if a vendor is supporting this promise then that is for you to decide.
However i stand by my statement that NFS is a file system exported across your network and not a full clustered file system.

Problem of using OCFS2 as shared storage to install RAC 10g on VMware

Hi, all
I am installing a RAC 10g cluster with two linux nodes on VMware. I created a shared 5G disk for the two nodes as shared storage partition. By using OCFS2 tools, i formatted this shared storage partition and successfully auto mounted it on both nodes.
Before installing, i use the command "runcluvfy.sh stage -pre crsinst -n node1,node2" to determine the installation prerequisites. Everything is ok except an error "Could not find a suitable set of interfaces for VIPs.". By searching the web, i found this error could be safely ignored.
The OCFS2 works well on both nodes, i formatted the shared partition as ocfs2 file system and configure o2bc to auto start ocfs service. I mounted the shared disk on both nodes at /ocfs directory. By adding an entry into both nodes' /etc/fstab, this partition can be auto mounted at system boots. I could access files in shared partition on both nodes.
My problem is that, when installing clusterware, at the stage "Specify Oracle Cluster Registry", I enter "/ocfs/OCRFILE" for Specify OCR Location and "/ocfs/OCRFILE_Mirror" for Specify OCR Mirror Location. But got an error as following:
----- Error Message ----
The location /ocfs/OCRFILE, entered for the Oracle Cluster Registry(OCR) is not shared across all the nodes in the cluster. Specify a shared raw partition or cluster file system that is visible by the same name on all nodes of the cluster.
------ Error Message ---
I don't know why the OUI can't recognize /ocfs as shared partition. On both nodes, using command "mounted.ocfs2 -f", i can get the result:
Device FS Nodes
/dev/sdb1 ocfs2 node1, node2
What's the possible wrong? Any help is appreciated!
Addition information:
1) uname -r
2.6.9-42.0.0.0.1.EL
2) Permission of shared partition
$ls -ld /ocfs/
drwxrwxr-x 6 oracle dba 4096 Aug 3 18:22 /ocfs/

Hello
I am not sure how far this following solution is relevant to your problem (regardless when it was originally posted - may help someone who is reading this thread), here is what I faced and here is how I fixed it:
I was setting up RAC using VMWare. I prepared rac1 [installed OS, configured disks, users, etc] and the made a copy of it as rac2. So far so good. When, as per the guide I was following for RAC configuration, I started OCFS2 configuration, faced the following error on RAC2 when I tried to mount the /dev/adb1:
===================================================
[Root @ *rac2* ~] # mount - t ocfs2 - o datavolume, nointr / dev / sdb1 / ocfs
ocfs2_hb_ctl: OCFS2 DIRECTORY corrupted WHILE reading uuid ocfs2_hb_ctl: OCFS2 DIRECTORY corrupted WHILE reading uuid
mount.ocfs2: Error WHEN attempting TO run / sbin / ocfs2_hb_ctl: "Operation not permitted" mount.ocfs2: Error WHEN attempting TO run / sbin / ocfs2_hb_ctl: "Operation not permitted"
===================================================
After a lot of "googling around", I finally bumped into a page, the kind person who posted the solution said [in my words below and more detailed ]:
o shutdown both rac1 and rac2
o in VMWare, "edit virtual machine settings" for rac1
o remove the disk [make sure you drop the correct one]
o recreate it and select *"allocate all disk space now"* [with same name and in the same directory where it was before]
o start rac1 and login as *"root"* and *"fdisk /dev/sdb"* [or whichever is/was your disk where you r installing ocfs2]
Once done, repeat the steps for configuring OCFS2. I was successfully able to mount the disk on both machines.
All this problem was apparently caused by not choosing "allocate all disk space now" option while creating the disk to be used for OCFS2.
If you still have any questions or problem, email me at [email protected] and I'll try to get back to you at my earliest.
Good luck!
Muhammad Amer
[email protected]

Assigning shared storage(LUNs) for SPARC T4-2 LDOMS

Hi friends,
I have a T4-2 server and need to create 2 LDOM's(solaris 11) in that for Oracle RAC installation. For this I have to assign shared(LUNs) storage from the zfs storage appliance for these 2 LDOM's. Could some one tell me how to do this(step by step) in LDOM.
Thanks in advance
Cheers..
RK

Depending how you configure your server on LDOM side, the procedure can be different. This depends also a little bit from the VM Server version.
More details are available in the sections named "I/O Domain Overview" and "Using Virtual Disks" : http://www.oracle.com/technetwork/documentation/vm-sparc-194287.html
Edited by: Pascal Kreyer - Oracle on May 5, 2013 9:29 AM

Storage Knowledge for RAC

Please advice me few books for developing my knowledge on EMC storage.
We are planning to buy EMC for RAC setup.
There are not many books around that topic.

Learning Oracle,
I don't think this or any other Oracle forum is a place for free consultancy, especially if you don't specify any details.
Richmond Shee and others have published a book on the Oracle Wait Interface, it is pretty indispensible.
Oracle Press has also a book on ASM out.
As this is not the place to post free abstracts of books, made by volunteers, I suggest you visit sites lke www.amazon.com or www.bn.com or whatever vendor you have access to.
Sybrand Bakker
Senior Oracle DBA

Shared Storage allocation for Oracle 10g RAC

Hi,
I am about to implement a Two Node Oracle 10g RAC on Windows 2008 (32-Bit) servers. We are going to use EVA4400 storeage and we have 600 GB for Oracle RAC and database.
I intend to follow the steps given in RACGuides_Rac10gR2OnWindows.pdf mentioned in Note 811271.1 (RAC Assurance Support Team: RAC Starter Kit and Best Practices (Windows)).
I would like to know how should I allocated the storage for OCR,Vote, Database and Flash Recovery Area. Meaning how many LUNs and of what size to be created and presented to both the servers. To start with I need to create a 25 GB database. We will be using Raw Device for OCR and Vote and ASM for Database and Flash Recovery Area.
Please advice.
Thanks,
Thiru

I am about to implement a Two Node Oracle 10g RAC on Windows 2008 (32-Bit) servers. Oracle 10g on Windows 2008 is not supported. Anyway installing a cluster as of today i would use a 64-bit operating system together with a 64-bit database. Everything else is not state-of-the-art anymore.
As of today i would go with 11g Release 1 (11.1.0.7.0) plus latest patches for Clusterware and ASM. Because you are using Windows 2008 you must use 11g Release 1 for the database as well. Bear in mind that Windows 2008 R2 is at this point in time not supported for 11g R1 or 11g R2 either.
I would like to know how should I allocated the storage for OCR,Vote, Database and Flash Recovery Area. Meaning how many LUNs and of what size to be created and presented to both the servers. This is said in the installation documents. Rule of thumb: At least three LUNs of 2 GB for OCR and three LUNs of 2 GB for Voting disk.
To start with I need to create a 25 GB database. We will be using Raw Device for OCR and Vote and ASM for Database and Flash Recovery Area.According to Oracles recommendations: Two disk groups: one for database files, the other for the flashback area.
But your setup may be different (more disk groups,....)
Ronny Egner
My blog: http://ronnyegner.wordpress.com

Hardware (storage) consideration for RAC 10gR2?

Dear experts!
We have to implement availibility for our database at a customer - RAC 10gR2. We don't have really high database workload and large amount of data (max. 30 GB).
So I would prefer a 2 node RAC. What are the requirements for such a "low level" RAC - specially for storage? The two nodes are in different rooms so I need 2 "storage devices" to be safety against fire.
We have to use:
- OS: Win2003 or 2008
- Oracle Standard Edition --> ASM
So could you please give me praxis tips about hardware consideration (components needed)?
Thanks
Markus

jymarkusg wrote:
Do you mean if I have a two node cluster and one node fails my whole cluster is offline? In comparison to a three node cluster this works how? Could you please give me more detailed information about this?No, that's not what I meant. I was talking about potentially split brain problems. 2 nodes looses communication with one another. How does a node now know whether it is at fault, or the other node? Does it restart or not?
That said - one of the RACs we have, is a small 2 node RAC. And I bet there are many more like that out there. So it used. However... I would prefer to have at least 3 nodes.
One problem for example is failover load. Simplistic example. When 1 node fails, its processes fails over to the other node. Assuming an even spread of all processes, the other node now gets a 100% load increase. This can be nasty if the remaining node is not fully able to deal with that increase. In a 3 node setup, the remaining 2 nodes would have dealt with an easier managed 50% load increase.
I don't agree with you that linux is cheaper - it depends on the customer's infrastructure. It doesn't make sense to run a linux server in an only windows environment with only windows administrators! And oracle is available for many platforms, so this restriction shouldn't be a problem.People can learn. In fact, I would expect that administrators would want to expand their knowledge. That is IMO not the primary deciding factor. Linux is by far more a capable o/s in the cluster environment. One only have to look at the top 500 clusters in the world. 443 of these are running Linux. That is 88.6% of the biggest and baddest clusters in the world. How many are running Windows? A measly 5 clusters.
No comparison. No contest.
Dataguard was already in evolution - but therefor I need oracle enterprise edition. RAC in standard edition is for free (with the limitation of 4 nodes and 4 cpus - but this should meet our requirements :-)).Never done a SE RAC. Even our small 2 node baby RAC is a TB database. Creating a RAC for a 30GB database..? I'm not sure what the expectations are. This is really a minute database and can be full cached in server memory. Can easily be virtualised (and with that, fallen over between machines). So ito of performance, scalability and even redundancy, there are a number of other options besides RAC.
For interconnect I would use gigabit as minimum.I personally recommend using Infiniband. GigE is at its maximum. Ceiling has been reached. IB QDR is now available and provide 40Gbit pipes. When running IPoIB, you can have 65K MTU, aka super jumbo frames. Or, using Oracle 11g, you can use RDS instead which is a lot faster than IP.
As far as I see the biggest problem is the storage...Ito costs for a low cost solution, yep. Especially when only needing a few GB of storage as oppose to a few TB. And instead, the money spend on this, could perhaps be far better spend on a virtualised solution.

Directory Setup for RAC and Oracle Restart

I have three database installations that I'd like some insight on the initial directory structure and permissions. The three installations are:
1) Prod RAC - OEL 5U2, 11.2.0.2 Grid Infrastructure, 11.2.0.2 DB EE with RAC option
2) Test RAC - OEL 5U2, 11.2.0.2 Grid Infrastructure, 11.2.0.2 DB EE with RAC option
3) Single Instance - OEL 5U2, 11.2.0.2 Grid Infrastructure Standalone (Oracle Restart), 11.2.0.2 DB EE
The they all have two users GRID (for Grid Infrastructure Software Owner) and ORACLE (for Oracle Database Software Owner).
We had a consultant install the databases. It's very weird since we have an inconsistency in directories and permission. I want to understand the inconsistency between RAC installations as well as Oracle Restart Install.
SEE BELOW: The two RAC servers have different owners for /u01/app/11.2.0.2 directory. The Oracle Restart Installation - Single Instance has the same owner as Prod RAC but different than Test RAC. What the consultant said was that ORACLE_BASE would be /u01/app/oracle for both Grid Infrastructure and Database installations. This was to apply to TEST/PROD RAC (3 node, 3 instances, 1 instance/node) and Oracle Restart installation. The GRID_HOME would be /u01/app/11.2.0.2/grid and ORACLE_HOME would be /u01/app/11.2.0.2/db_1. It seems like the owners aren't setup correctly. Why? I don't want problems with patching or upgrading. If this setup is technically incorrect what is the best way to setup so there's no owner/permission issues. Is it necessary to have two separate ORACLE_BASE's like /u01/app/grid?
PRODUCTION REAL APPLICATION CLUSTER (Displaying only one Node details)
$ cd app
drwxr-xr-x 6 root oinstall 4096 Feb 26 2011 .
drwxr-xr-x 3 root oinstall 4096 Apr 21 2009 ..
drwxrwxr-x 4 grid oinstall 4096 Feb 26 2011 11.2.0.2
drwxrwxr-x 2 emagent oinstall 4096 Feb 26 2011 emagent
drwxrwxr-x 9 oracle oinstall 4096 May 16 2011 oracle
drwxrwx--- 7 grid oinstall 4096 Feb 26 2011 oraInventory
$ cd 11.2.0.2
drwxrwxr-x 4 grid oinstall 4096 Feb 26 2011 .
drwxr-xr-x 6 root oinstall 4096 Feb 26 2011 ..
drwxr-xr-x 79 oracle oinstall 4096 Mar 29 2011 db_1
drwxr-xr-x 69 root oinstall 4096 Feb 26 2011 grid
$ cd ..
$ cd oracle
9 oracle oinstall 4096 May 16 2011 .
drwxr-xr-x 6 root oinstall 4096 Feb 26 2011 ..
drwxr-xr-x 4 oracle oinstall 4096 Feb 26 2011 admin
drwxr-xr-x 3 oracle oinstall 4096 Feb 26 2011 cfgtoollogs
drwxrwxr-x 2 grid oinstall 4096 Feb 26 2011 Clusterware
drwxrwxr-x 11 grid oinstall 4096 Feb 26 2011 diag
drwxrwxr-x 3 grid oinstall 4096 Feb 26 2011 hqrac03
drwxr----- 3 oracle oinstall 4096 May 16 2011 oradiag_oracle
drwxr-xr-x 3 root root 4096 Mar 13 2011 oradiag_root
TEST REAL APPLICATION CLUSTER (Displaying only one Node details)
$ cd app
drwxr-xr-x 6 root oinstall 4096 Jan 26 2011 ./
drwxr-xr-x 3 root oinstall 4096 Jan 26 2009 ../
drwxrwxr-x 4 root oinstall 4096 Jan 26 2011 11.2.0.2/
drwxrwxr-x 2 emagent oinstall 4096 Mar 1 2011 emagent/
drwxrwxr-x 10 grid oinstall 4096 May 16 2011 oracle/
drwxrwx--- 7 grid oinstall 4096 Jan 27 2011 oraInventory/
$ cd 11.2.0.2
drwxrwxr-x 4 root oinstall 4096 Jan 26 2011 ./
drwxr-xr-x 6 root oinstall 4096 Jan 26 2011 ../
drwxr-xr-x 80 oracle oinstall 4096 Mar 17 2011 db_1/
drwxr-xr-x 70 root oinstall 4096 Jan 27 2011 grid/
$ cd ..
$ cd oracle
drwxrwxr-x 10 grid oinstall 4096 May 16 2011 ./
drwxr-xr-x 6 root oinstall 4096 Jan 26 2011 ../
drwxr-xr-x 4 oracle oinstall 4096 Feb 2 2011 admin/
drwxr-xr-x 4 oracle oinstall 4096 Feb 2 2011 cfgtoollogs/
drwxr-xr-x 2 grid oinstall 4096 Jan 26 2011 Clusterware/
drwxrwxr-x 11 grid oinstall 4096 Jan 26 2011 diag/
drwxr-xr-x 3 grid oinstall 4096 Jan 26 2011 hqract03/
drwxr-xr-x 3 grid oinstall 4096 Mar 23 2011 oradiag_grid/
drwxr----- 3 oracle oinstall 4096 May 16 2011 oradiag_oracle/
drwxr-xr-x 3 root root 4096 Jan 27 2011 oradiag_root/
SINGLE INSTANCE DATABASE (ORACLE RESTART)
$ cd app
drwxrwxr-x 6 503 oinstall 4096 Feb 26 2011 .
drwxr-xr-x 3 root root 4096 Apr 16 2009 ..
drwxrwxr-x 4 grid oinstall 4096 Feb 26 2011 11.2.0.2
drwxrwxr-x 8 grid oinstall 4096 Feb 26 2011 oracle
drwxrwx--- 6 grid oinstall 4096 Feb 26 2011 oraInventory
$ cd 11.2.0.2
drwxrwxr-x 4 grid oinstall 4096 Feb 26 2011 .
drwxrwxr-x 6 503 oinstall 4096 Feb 26 2011 ..
drwxr-xr-x 76 oracle oinstall 4096 Apr 6 2011 db_1
drwxr-x--- 69 root oinstall 4096 Feb 26 2011 grid
$ cd ..
$ cd oracle
drwxrwxr-x 8 grid oinstall 4096 Feb 26 2011 .
drwxrwxr-x 6 503 oinstall 4096 Feb 26 2011 ..
drwxrwxr-x 5 grid oinstall 4096 Feb 26 2011 admin
drwxrwxr-x 7 grid oinstall 4096 Feb 26 2011 cfgtoollogs
drwxrwxr-x 2 grid oinstall 4096 Feb 26 2011 checkpoints
drwxrwxr-x 2 grid oinstall 4096 Feb 26 2011 Clusterware
drwxrwxr-x 11 grid oinstall 4096 Feb 26 2011 diag
drwxrwxr-x 3 grid oinstall 4096 Feb 26 2011 hqods01
Thanks so much.

Hello
I did only check prod, as that is the important one.
i am afraid that setup is not clean. I won't use the work is wrong, but need to be normalized.
grid oracle base need to be separate from oracle oracle base, and the grid oracle home, MUST be outside of oracle base/oracle home of the oracle user.
In a multi user setup, the structure should be as follow.
grid user, group oinstall, asm* groups
oracle user, group oinstall, dba and db* groups
The GRID install, have, grid home and oracle base
the oracle base for grid should be, /u01/app/grid
the grid home should be, /u01/app/11.2.0.3/grid
the Oracle user have several homes, and oracle base
the oracle base for oracle should be, /u01/oracle
so, for permissions, when I create this, i do as root
mkdir -p /u01/app/11.2.0.3/grid
mkdir -p /u01/app/grid
mkdir -p /u01/app/oracle
mkdir -p /u01/app/oraInventory
chown -R grid:oinstall /u01
chown -R oracle:oinstall /u01/app/oracle
then, you install grid .. you have so say oracle home is /u01/app/grid and oracle home is /u01/app/11.2.0.3/grid
at the end, the root.sh as part of the install will take care of the permissions for oraInventory, and the rest for grid.
when grid is installed, you can move to the oracle db install you use oracle base as /u01/app/oracle and oracle home as /u01/app/oracle/product/11.2.0.3/dbhome_1
that will give you
2 4 drwxr-xr-x 6 root oinstall 4096 Sep 21 03:20 /u01
5996545 4 drwxr-xr-x 6 root oinstall 4096 Sep 18 22:58 /u01/app
5996546 4 drwxr-xr-x 8 grid oinstall 4096 Sep 18 22:50 /u01/app/grid
5996547 4 drwxr-xr-x 3 root oinstall 4096 Sep 18 22:30 /u01/app/11.2.0.3
5996548 4 drwxr-xr-x 69 root oinstall 4096 Sep 21 10:52 /u01/app/11.2.0.3/grid
5996549 4 drwxrwx--- 5 grid oinstall 4096 Oct 30 22:08 /u01/app/oraInventory
7406840 4 drwxr-xr-x 7 oracle oinstall 4096 Oct 30 22:09 /u01/app/oracle
7406841 4 drwxr-xr-x 3 oracle oinstall 4096 Sep 18 22:58 /u01/app/oracle/product
7406842 4 drwxr-xr-x 6 oracle oinstall 4096 Oct 30 22:04 /u01/app/oracle/product/11.2.0.3
7766052 4 drwxr-xr-x 77 oracle oinstall 4096 Nov 2 01:20 /u01/app/oracle/product/11.2.0.3/dbhome_1
Each user have to use his own oracle_base, as each oracle_base will store files and folders created for logs, admin, diagnostic with different permissions and different usages, for a reason you have role separation.
example of the content of each oracle base
$ find /u01/app/oracle/ -maxdepth 1 -ls
7406840 4 drwxr-xr-x 7 oracle oinstall 4096 Oct 30 22:09 /u01/app/oracle/
7406841 4 drwxr-xr-x 3 oracle oinstall 4096 Sep 18 22:58 /u01/app/oracle/product
8749076 4 drwxrwxr-x 3 oracle asmadmin 4096 Sep 18 23:03 /u01/app/oracle/diag
8749064 4 drwxr-x--- 6 oracle oinstall 4096 Oct 30 22:09 /u01/app/oracle/admin
8716289 4 drwxr-xr-x 2 oracle oinstall 4096 Oct 30 22:18 /u01/app/oracle/checkpoints
8749061 4 drwxr-x--- 5 oracle oinstall 4096 Sep 18 23:12 /u01/app/oracle/cfgtoollogs
$ find /u01/app/grid/ -maxdepth 1 -ls
5996546 4 drwxr-xr-x 8 grid oinstall 4096 Sep 18 22:50 /u01/app/grid/
7307540 4 drwxrwxr-x 4 grid oinstall 4096 Sep 18 22:49 /u01/app/grid/diag
7307474 4 drwxr-xr-x 2 grid oinstall 4096 Sep 18 22:33 /u01/app/grid/Clusterware
7307265 4 drwxr-xr-x 2 grid oinstall 4096 Sep 18 22:33 /u01/app/grid/checkpoints
7307532 4 drwxr-x--- 4 grid oinstall 4096 Sep 18 22:49 /u01/app/grid/cfgtoollogs
7406796 4 drwxr-xr-x 3 root root 4096 Sep 18 22:50 /u01/app/grid/oradiag_root
Take care,
Alvaro.

What is the best way to configure storage device for rac?

Hi
On my disk array i have 7mirors and two conroler, what is the best way to configure environment?
My application is OLTP, it runs 6-20 o clocj, so i can do backup when nobady work
Database 10g r2, Windows 2003 enterpise
for examlep
First controler
disks 1-5 DATA
second cotnroler
disks 6-7 FLASH
or meyby share one disk on DATA and FLASH?
Thanks in advice

The best is you use ASM (maybe you do it already) and put one failure group on the first disk array and the second failure group on the second array. Then you can ASM let do the work.
Werner

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.

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

Shared Storage to handle multiple seats for UHD-4k,8k and larger res-am I dreaming?

Is this possible?
In our shop we work in very large canvases in AE and PPro for Live Event Production. Lots of compositing in 4k up to and sometimes beyond 8k. AE for the heavy compositing with mediocre RAM previews. PPro for PreViz playback with realtime performance a must in HD and most times in 4k.
We have been working thru setting up appropriate workstations to handle the performance and are making progress. We have historically been on all Macs but branching out to PC for the better performance capabilities. And testing render farms for big renders.
Storage is the next project. We have 10-15 AE artists and 5-8 PPro editors that would benefit form a shared storage solution. Is this possible with current storage technoloigy? Or would it be more efficient to look into local storage like SAS...or?
Would appreciate any input.
Oh...and this Adobe Anywhere sounds very interesting in our workflow....any opinions? Again....not talking about hd or lower res....4k and above.
Thanks,
-philc

All that I know is from past discussions (see below) which indicate that you may not edit over a network connection (except Anywhere, which is a different product) so you will be limited to using any kind of shared storage only for "master" files that are copied to local drives for editing and then back when the edit is done
But, since I don't do that kind of editing anyway, all I have are some saved links... and there may be newer products that will work for shared editing, not just store files
Any version of Premiere doesn't work properly, if at all, over a network... so if it works at all, expect inconsistent behavior and problems
-see messages #1 and #3 in http://forums.adobe.com/thread/771151
-you MUST give all users administrator accounts to use Premiere
-and especially Encore dual layer http://forums.adobe.com/thread/969395
-#5 Server 2008 is UNsupported http://forums.adobe.com/thread/851602
-a work around, of sorts http://forums.adobe.com/thread/957523
-and not on a "domain" http://forums.adobe.com/thread/858977
-http://helpx.adobe.com/premiere-pro/kb/networks-removable-media-dva.html

When installing clusterware, shared storage trouble

I was trying to install clusterware. When I typed location of OCR, I got error below:
Oracle Cluster Registry (OCR) is not shared across all the nodes in the cluster
Then, I found I can not mount ocfs2 on both nodes at the same time. But I can mount it on any one of nodes if it is umounted on the other one.
Can you anyone give me a hand?
Environment is as following:
- OS: Oracle Linux 5 (update 4)
- Openfiler 3 + ocfs2
- Oracle 10gR2

Hi;
Please see:
http://kr.forums.oracle.com/forums/thread.jspa?messageID=4254569
Oracle 10g RAC install- OPEN FAIL ON DEV
Oracle Cluster Registry (OCR) is not shared across all the nodes . . .
After OCFS2 install/configure ~ Shared storage check check fails
Problem of using OCFS2 as shared storage to install RAC 10g on VMware
Regard
Helios

R12 upgrade on RAC env

Hi,
Planning to do major upgrade from R11i to R12.1.3 , can we do major upgrade on already RAC enabled database or is it preffered to run upgrade on a single instance.
Anyone has experience doing upgrade on RAC if so can you share your findings
Thanks

We just did a pilot and found lot of cluster wait when the Maintenance patch was doing updates on same table, we had 32 workers running and saw the waits when 32 workers was running same job in parallel as part of R12 MPCan you reproduce the issue with other patches? Or it is just specific to the maintenance pack patch
Did you made any parameter changes to work specific for RAC env if so can you shareNo.
For similar issues, I would suggest you log a SR.
Thanks,
Hussein

Shared storage setup for 'RAC' env

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