Hardware architecture for RAC

Hi,
I want to secure my 10g DB for high availability. It looks like RAC with 2 servers (instances) is the best option (?). Can someone tell me what is the best hardware architecture to use (Windows Servers). Is a SAN mandatory or can I just use a NAS. I understand how RAC works but I am just lost with the hardware.
Thanks !
Alex

http://www.fast-track.cc/teas_ft_rac28.htm
No 64 bit windoze, no NAS.That's a pretty old link. You can use NAS with RAC now, but it better be a high end system, like a NetApp. Of course, at that point, why not just use the fibre connections to the NA. shrug
As far as 64 bit windows, you can run 10gR2 RAC on Windows 2003 64 bit.
To the original poster, what's fueling your decision for RAC? Is your high availability need truly 24x7, or just low downtime? Just curious, as RAC can be more of a liability than an asset at times, especially for those that are not as experienced with it.
For hardware...don't go Itanium 2...those things are just baaaad news, especially with RAC. I guess it all depends on the amount of horsepower you need. Are you using Standard Edition? If so, you wont be able to go above two servers. If not, what is your budget? Remember that while RAC is touted for scalability, you shouldn't make your server too too small, or you may end up in a max-CPU headache.
Sorry, no other ideas on hardware, but wanted to clear up any misunderstandings about RAC on Winders.

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Your Hardware configuration for RAC.

Hi,
What would be the best hardware solution for your regarding RAC? or put in another way, what hardware configuraton you are using for your RAC?
regards,

hi
As good as you could provide for your RAC. RAC could be built on simple
P IV machines having a shared storage and two NICs with 100Mb speed connected via low speed network.
If i would be using a 2 node RAC, i would use two 64-bit server class machines with 4G RAM each, high speed shared storage, and Nodes connected through GB speed NICs with fiber optics.
It would really give me a lot of satisfaction.
Regards

Hardware requirements for RAC Setup on Linux

Hi,
Can any body help me...We are soon going for the RAC setup on linux operating system.So,i need to provide the customer,the hardware needed for this setup.
Please send me the list of all the things right from small things....
regards,
Mohammed

Hi Mohammed,
In addition you may find good information in below doc:
http://download.oracle.com/docs/cd/B19306_01/rac.102/b28759/toc.htm
Regards,
Marcello M.

Hardware required for RAC setup at home

Hi All,
Could you please suggest the Hardware required for practicing RAC at home.
Regards,
VN

Hi, "user7202581",
For practicing purposes, you could consider a VBox / OVM based setup at home. We have used those for Hands On Labs in the course of Oracle Open World more than once. I recommend you use a machine with at least 8GB memory and dual core (HT enabled) processors. Some configuration examples: Lenovo Laptop, ThinkPad, 8GB, 320GB HDD, i5 dual core, 2.5 GHz, Win 7 or a Mac Mini, latest version, i5 dual core, 2.3GHz and 8GB memory would do the trick for a two node cluster. Note that I mention the hosting OS in case you use VBox. For OVM based setups you either have to use a dual boot system or use a dedicated machine. You will be somewhat restricted with respect to the hardware failures you can impose on this system obviously (due to the VM setup), but for practicing purposes, you should find those environments sufficient, I think. Also see: RAC on OVM templates: http://www.oracle.com/technetwork/server-storage/vm/rac-template-11grel2-166623.html
Hope that helps. Thanks,
Markus

Hardware architecture recommendations for PS 9.1

Hi there,
I'm trying to find some recomendation on hardware architecture for PeopleSoft tools 8.5, App version 9.1, for windows/sql 2008 environment. We're using PS FIN & SCM modules.
thanks for your help

Hi there,
I'm trying to find some recomendation on hardware architecture for PeopleSoft tools 8.5, App version 9.1, for windows/sql 2008 environment. We're using PS FIN & SCM modules.
thanks for your help

Preferred Hardware Plattform for Linux RAC Cluster

What ist the preferred Hardware Platform
for using LINUX with Oracle RAC - Cluster solution ?
What do you prefer Suse or Redhat ?
Is there a tested Hardware Environment from Oracle Support ?
Thanks

You have the disk space, but not the memory, even discounting the memory for the Oracle VM hypervisor, OEL/RH5 is going to take at least 1G to run. So, with your base OS, hypervisor, Linux and Oracle (clusterware and DB), it may be possible, but I believe you would be swapping so much you would have terrible performance. I would look at a MINIMUM of 3GB if not 4GB RAM to try this configuration.
Cheers
Jay
http://www.grumpy-dba.com

Hardware requirement for Oracle RAC 11g R2 on solaris

Hi Experts,
1. can we use the below server for RAC setup,please note that system model is different
bash-3.00# uname -a
SunOS KCHJSAPP004 5.10 Generic_127127-11 sun4v sparc SUNW,SPARC-Enterprise-T5120
bash-3.00# uname -a
SunOS KCHJSAPP007 5.10 Generic_139555-08 sun4v sparc SUNW,T5140
2. see below the cyrrent version of OS.we will update first one with patch 7 and make both version similar.is that ok or we shold upgrade with latest patch?
bash-3.00# more /etc/release
Solaris 10 5/08 s10s_u5wos_10 SPARC
Copyright 2008 Sun Microsystems, Inc. All Rights Reserved.
Use is subject to license terms.
Assembled 24 March 2008
bash-3.00# more /etc/release
Solaris 10 5/09 s10s_u7wos_08 SPARC
Copyright 2009 Sun Microsystems, Inc. All Rights Reserved.
Use is subject to license terms.
Assembled 30 March 2009
Thanks,
Rasin M

check this note on MOS:
How to find RAC certifications in MOS Certification Tab [ID 1053954.1]
hth

SYSTEM HARDWARE REQUIREMENT FOR ORACLE RAC +ORACLE GRID INFRASTRUCTURE

Hi Guru's,
Can anyone of you explain me what exactly the system H/W requirement for Installing Oracle 11gR2 Grid Infrastructure along with Oracle RAC.
I already have 8GB RAM,i3 Processor.

If you like to install RAC on vmware, this 8gb memory enough. you can allocate 2gb for one node and also other. So total 4GB enough for RAC installation.
Refer
Oracle 11gR2 two node Real application cluster installation step by step guide on linux using VMware Server | DBA

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

Urgent help needed in configuring X1151A for RAC cluster

for RAC requirements I have to configure this card to use the interface name of ce1 but I have tried changing slots and puting /etc/hostname.ce1 file out there but it fails .. it always comes up as ce0.
my question is : How can I cofigure this card to come up as ce1 ? in the other box I had to do nothing .. i just placed the /etc/hostname.ce1 file with hostname and it works perfect.
can you please email me a copy of your response at [email protected] ?
thanks
Sami

Look for "ce" instances in the /etc/path_to_inst file. You'll need to change the lines so that the hardware path you want is "1".
Keep a backup and write down the pathname. You can give that path to a 'boot -a' prompt if anything bad happens.
Darren

Hardware requirement for Fusion Applications HCM installation

Hi Team,
I want to install fusion applications for HCM.
Can any one suggest the minimum hardware requirement for installation.
Please help me with any documents.
Thanks,
Chandra

Dear Chandra,
Please note that Fusion Applications installation involves following components.
1. Oracle Identity and Access Management components (Middleware infrastructure)
2. Oracle Database for IDM
3. Oracle Database for Fusion Apps
4. Fusion Applications Domains (includes Admin and managed servers for Fusion Applications)
I have posted a guide on installing Fusion applications on 2 node setup and if you have sufficient hardware to host 2 VMs then it can be done on single server as well.
http://www.oratraining.com/blog/2013/03/oracle-fusion-applications-installation-step-by-step-guide-11-1-6/
This will explain the 2 node architecture which I have prepared.
http://www.oratraining.com/blog/2013/03/fusion-applications-architecture-for-2-node-setup/
The minimum memory requirement changes if you select more products since in Fusion apps each products have their own domain and if you select more products then there will be more application managed servers (even if you don't select a product family, it will still create some managed weblogic servers based on dependency with selected products)
The minimum memory requirement to host IDM and consolidated DB in 1 node is 10-12 GB
The minimum memory requirement to host Fusion Applications domains on 2nd node is 64 GB (for 1 product family, for all products selected then 128 GB)
Please note that these are "minimum" requirements based on my experience, not as per the documents since what we are talking about is installing for "learning", not for production, where you will host various components in separate nodes.
Thanks
Tushar
www.oratraining.com

Can I use virtual Servers in private cloud for RAC

Hello to all
We are going to install an Oracle RAC on two servers
But our Hardware Administrator says to us “I Allocate two virtual servers in the our private cloud not two physical Servers (or real Servers)”
Do you think it’s practical and reasonable to using virtual Server for Oracle RAC in production environment ?
Which one is better physical server or virtual server for RAC?
Please write your reasons
Thanks

Using virtual machines is officially supported for RAC only in a few cases which can be found here:
http://www.oracle.com/technetwork/database/virtualizationmatrix-172995.html
Make sure that you meet these requirements in your private cloud. Some cases like vmware are still somewhat supported despite beeing not on the list.
Beside this you should make sure that your 2 virtual machines run on different hardware servers in the cloud, otherwise you lose most parts of the rac advantage regarding high availability, when both virtual servers happen to run on the same hardware during a crash
Virtual servers are used in production environments, but you will have to take greater care for many aspects of rac compared to physical hardware, e.g.. something like "live migration" of vmware can kill a rac node due to timeout.
I would prefer hardware for rac anytime over virtual servers and spare me the hassle of dealing with all possible issues arising from the virtualization.
And check oracles licensing policy...
Running an enterprise edition rac on e.g. a large vmware cluster is insanely expensive, you pay every cpu core the rac COULD run on -> the entire cluster!
If you must use virtual hardware but don't want to and need an argument against it use the license issue.
Regards
Thomas

Hardware Mirroring for Voting Disk

With Oracle 10g r2 the clusterware installation now allows to use hardware mirroring for the voting disk. My question is does anyone see anything wrong with using the hardware mirroring?

Nope, nothing wrong with it. I also wouldn't know why pre 10gr2 would not allow this since oracle only sees a 'device' anyway and this should be transparent to the clusterware. Definitely do this, especially if you only have 1 voting disk. Otherwise, failure of one disk would bring down you whole rac.

Recommended Hardware Config for huge OLAP Cube build

Hi David ,
Can you please provide the recommended hardware config for cube having billions of data under fact table . We ran a cube with 0.1 billion of data took around 7 hours to process. What could be the key areas to gain the performance benefit ? ansd also what could be the CPU , RAM (server) , RAM (Oracle DB) to gain much more perf benefit in such configurations ?
Also we have 32 bit windows 2003 server .Can we get better result if we switch to 64 bit ?
Thanks in advance,
DxP.

Hi!
Well, I would definitely recommend you to proceed with a consultant because I feel that you have some lack of methodology and experience together with time constraints for your project.
Regarding hardware, unfortunately, I would not be able to give you any precise figures because I have no supporting information. What you should bear in mind that your system must be balanced. You (better with consultant) need to find a right balance between all the factors you consider as important while building a pile of hardware:
- cost
- architecture
- speed
- availability
- load scenarios
etc...
Regarding architecture point bear in mind that today finding right balance between processing power and storage processing capacity is a challenge. Put attention to this.
Regards,
Kirill

Dedicated switches needed for RAC interconnect or not?

Currently working on an Extended RAC cluster design implementation, I asked the network engineer for dedicated switches for the RAC interconnects.
Here is a little background:
There are 28 RAC clusters over 2X13 physical RAC nodes with separate Oracle_Home for each instance with atleast 2+ instances on each RAC node. So 13 RAC nodes will be in each site(Data-Center). This is basically an Extended RAC solution for SAP databases on RHEL 6 using ASM and Clusterware for Oracle 11gR2. The RAC nodes are Blades in a c7000 enclosure (in each site). The distance between the sites is 55+ kms.
Oracle recommends to have Infiniband(20GBps) as the network backbone, but here DWDM will be used with 2X10 Gbps (each at 10 GBps) links for the RAC interconnect between the sites. There will be separate 2x1GBps redundant link for the Production network and 2x2 GBps FC(Fiber-Channel) redundant links for the SAN/Storage(ASM traffic will go here) network. There will be switches for the Public-production network and the SAN network each.
Oracle recommends dedicated switches(which will give acceptable latency/bandwith) with switch redundancy to route the dedicated/non-routable VLANs for the RAC interconnect (private/heartbeat/global cache transfer) network. Since the DWDM interlinks is 2x10Gbps - do I still need the dedicated switches?
If yes, then how many?
Your inputs will be greatly appreciated.. and help me take a decision.
Many Thanks in advance..
Abhijit

Absolutely agree.. the chances of overload in a HA(RAC) solution and ultmate RAC node eviction are very high(with very high latency) and for exactly this reason I even suggested inexpensive switches to route the VLANs for the RAC interconnect through these switches. The ASM traffic will get routed through the 2x2GB FC links through SAN-Directors (1 in each site).
Suggested the network folks to use Up-links from the c7000 enclosure and route the RAC VLAN through these inexpensive switches for the interconnect traffic. We have another challenge here: HP has certified using VirtualConnect/Flex-Fabric architecture for Blades in c7000 to allocate VLANs for RAC interconnect. But this is only for one site, and does not span Production/DR sites separated over a distance.
Btw, do you have any standard switch model to select from.. and how many to go for a RAC configuration of 13 Extended RAC clusters with each cluster hosting 2+ RAC instances to host total of 28 SAP instances.
Many Thanks again!
Abhijit

Hardware architecture for RAC

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