Rac and clustering setup
Hi all,
I want to know abt RAC and clustering.Can any one describe me abt these two things.
I got two instances running in 2 AIX machines of size 25 gb each. im zero in this. can any one help me regarding this
first of all i do no what is RAC and Clustering
Regards
Elamaran
2 instances (or more) will indeed be reading and writing to the same database files. When one instance fails, the other one takes over. Therefore availability is ensured.
look here fore info on RAC:
http://download-uk.oracle.com/docs/cd/B19306_01/rac.102/b14197/toc.htm
Similar Messages
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Environment:
Oracle 11gR2 RAC (2 node) with ASM
HP-UX B.11.31 U ia64
We have configured two ASM disk group for Data & FRA, and we configured RMAN backup into FRA location. Now our Database, Log file, Archive logs and RMAN backup files all are in ASM on primary site.
Our network team is using Recover Point to mirror all the disks into DR site; we have no setup from Oracle side. What is the possible configuration that we need to have in DR site from Oracle side in order to bring-up the database in-case of primary site failure (disaster).
I am new to Oracle RAC can some one give me a suggestion.
- ManoWhat is the possible configuration that we need to have in DR site from Oracle side in order to bring-up the database in-case of primary site failure ORACLE DATAGUARD is what you need; not RAC
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RAC and ASM with geographically seperated disks
We are planning to use RAC and ASM with four nodes. The two nodes will be at one location and another two nodes at different location. The ASM disks also will be available locally. Is it possible to configure ASM with geographycally serepared disks.
We are thinking of two RAC and ASM setups with two nodes each and streams replication between the RACs.
I want to know what is the best method to implement. Is it RAC with four nodes OR two RACs with two nodes each and streams replication between the RACs.Apart from the latency issue, which has been mentioned by others, you also need to mirror your disks between the two sites and be very careful about split brain scenarios under node or site crashes.
You need to mirror the disks between the sites in case one site crashes completely and loses all network access. The only way the second site can carry on is if it has access to all the data disks, and the cluster control disks (terms vary for this, such as quorum or voting disk). If you do not mirror you simply do not have a resilient design. Resilience is about eliminating all single points of failures, which means duplicating everything i.e. mirroring.
And mirroring between two remote sites adds more volume to the data traffic between the two sites. And it would need to be synchronous rather than asynchronous to guarantee no data loss. And your commits for each transaction would be limited by the round trip time to write to the remote site and get the acknowledgement back.
Split brain is something you need to avoid with remote clusters, and local clusters too. If the network goes down between the two sites and both sites have local copies of all of the data and cluster control disks, which site becomes the primary and which one becomes the standby? You cannot have both sites coming back up as primary with active databases and accepting transactions! At this point you have split brain, and each side is processing transactions independently, and both databases are now deviating from each other with different data changes.
I don't think a 4 node RAC environment split across geographical distances is really viable, except under small transaction volumes, and where response time (transaction time) is not critical. If you have high volumes and need fast transactions then you need to only use local RAC configurations, and replicate between the two sites asynchronously. DataGuard is easier, but you need to decide if you need Streams and how to make it work for you.
John -
Cloning 11i non split to split configuration with RAC and ASM
Hello Hussein,
I just want to ask some ideas on what is the best way to clone our UAT/DEV environment to our PROD environment.
Right now no RAC and ASM setup for the source system still 9.2.0.5 but the plan is to convert to ASM + 10g RAC.
Can you please let me know on what is the best way to setup PROD out of our UAT environment?
Here's my options:
1. Install a fresh prod system
2. Convert source system to ASM + RAC before cloning to target - setup as below:
(Source)
APPS server - 32bit
DB server (2 node RAC + ASM) - 32bit
(Target)
APPS server - 32bit
DB server (2 node RAC + ASM) - 64bit
3. Clone existing target system (non RAC and non ASM)
copy source APPL directories to target
Install 64 bit Oracle 10g to the target system
clone/convert database source (9i 32bit) to database targer (10g 64 bit) using RMAN.
Install clusterware 11gR2
Convert database to RAC
Can you please let me know on what is the best approach to do this? For fresh install it will take some time to apply the current patch level and applying other patches.
For Option 2, seems a bit complicated to do 32bit - 64 bit cloning on RAC. Appreciated if you can provide doc id for this.
For Option 3, not sure how smooth the conversion from 32bit to 64bit.
Appreciate your insights on this.
Regards,
jeffreyHi Jeffrey,
Since you are on 9.2.0.5, I assume you are running Oracle Apps 11i and not R12.
1. Install a fresh prod systemThis option requires applying all patches (as you mentioned above) plus you will have to convert to ASM/RAC on the source/target instance. I would not recommend this approach since would require extra work/time.
2. Convert source system to ASM + RAC before cloning to target - setup as below:
(Source)
APPS server - 32bit
DB server (2 node RAC + ASM) - 32bit
(Target)
APPS server - 32bit
DB server (2 node RAC + ASM) - 64bitWhat are the source and target database version?
As per (Certified RAC Scenarios for E-Business Suite Cloning [ID 783188.1]) this is supported by Rapid Clone. So, in this case you need to convert the source instance to RAC and migrate to ASM then use Rapid Clone to clone the application/database.
Cloning Oracle Applications Release 11i with Rapid Clone [ID 230672.1] -- 6. Cloning a RAC System
You will have to convert the target database then from 32-bit to 64-bit.
3. Clone existing target system (non RAC and non ASM)
copy source APPL directories to target
Install 64 bit Oracle 10g to the target system
clone/convert database source (9i 32bit) to database targer (10g 64 bit) using RMAN.
Install clusterware 11gR2
Convert database to RAC Here you will have to convert to RAC/ASM on both the source/target instances -- You are eliminating the patches part in Option 1, but again extra work need to be done to convert the database from 32-bit to 64-bit on the target instance + convert to RAC and migrate to ASM (on both instances).
Based on the above, I would recommend and suggest you go with Option 2.
Thanks,
Hussein -
Install Real Application Clusters (RAC) and Automated Storage Management (A
Do I have to install Real Application Clusters (RAC) and Automated Storage Management (ASM) for ETL
I have installed Oracle 10g Release 1 on WIndows 2000 with datawarehousing option.
Is it ok
Or do I need to install Oracle database again.
Please helpGreg,
From what you describe you did exactly the right thing. The runtime platform service will by default run on DWH01, but you can shut it down on that node and have it run on DWH02 (in case you wanted to bring down DWH01 but still run Warehouse Builder processes). Note that we strongly recommend using the net service name in the location registration in the deployment manager (so that you automatically take advantage of the client-side load balancing feature of RAC (as well as the server-side load balancing)).
Thanks,
Mark. -
Reading matt manfredonias Q/A about Load Balancing, I stil wonder, how the "outer world" sees the RAC.
What happens in case of one of two nodes vanishing from the network. What if this node was the dispatcher?
The user/application has to switch over somehow, hasn't he?
Klausfor more information :
Real Application Clusters Administration Contents / Search / Index / PDF
Real Application Clusters Concepts Contents / Search / Index / PDF
Real Application Clusters Deployment and Performance Contents / Search / Index / PDF
Real Application Clusters Documentation Online Roadmap Contents / Search / /
Real Application Clusters Real Application Clusters Guard I - Concepts and Administration Contents / Search / Index / PDF
Real Application Clusters Real Applications Clusters Guard I Configuration Guide Release 2 (9.2.0.1.0) for UNIX Systems: AIX-Based Systems, Compaq Tru64 UNIX, HP 9000 Series HP-UX, and Sun Solaris Contents / Search / Index / PDF
Real Application Clusters Setup and Configuration Contents / Search / Index / PDF
http://otn.oracle.com/pls/db92/db92.docindex?remark=homepage
Joel P�rez -
RMAN support of OPS/RAC and ISD's
Can some one point me in the right direction for any white papers, or documentation, on RMAN and its current support of OPS/RAC and/or Intelligent Storage Devices (ISD). I'm trying to do a comparison of RMAN against other third party backup and recovery software and need to find out as much as I can of RMAN support of these architectures. Thanks!
The closest documention I have of RMAN and OPS/RAC is the Oracle Documentation. Take a look in the RAC ADMIN doc. And I talked a little bit about it in an OpenWorld paper from last year. You can find the paper @
http://otn.oracle.com/deploy/availability/pdf/BR_OOW01_213WP.pdf
Bottom line, RMAN supports the clustered environments the same as single instance databases. The rub is the archive log destinations. This is discussed in the RAC documentation.
Thanks, Tammy -
Solaris 10 and Hitachi LUN mapping with Oracle 10g RAC and ASM?
Hi all,
I am working on an Oracle 10g RAC and ASM installation with Sun E6900 servers attached to a Hitachi SAN for shared storage with Sun Solaris 10 as the server OS. We are using Oracle 10g Release 2 (10.2.0.3) RAC clusterware
for the clustering software and raw devices for shared storage and Veritas VxFs 4.1 filesystem.
My question is this:
How do I map the raw devices and LUNs on the Hitachi SAN to Solaris 10 OS and Oracle 10g RAC ASM?
I am aware that with an Oracle 10g RAC and ASM instance, one needs to configure the ASM instance initialization parameter file to set the asm_diskstring setting to recognize the LUNs that are presented to the host.
I know that Sun Solaris 10 uses /dev/rdsk/CwTxDySz naming convention at the OS level for disks. However, how would I map this to Oracle 10g ASM settings?
I cannot find this critical piece of information ANYWHERE!!!!
Thanks for your help!You don't seem to state categorically that you are using Solaris Cluster, so I'll assume it since this is mainly a forum about Solaris Cluster (and IMHO, Solaris Cluster with Clusterware is better than Clusterware on its own).
Clusterware has to see the same device names from all cluster nodes. This is why Solaris Cluster (SC) is a positive benefit over Clusterware because SC provides an automatically managed, consistent name space. Clusterware on its own forces you to manage either the symbolic links (or worse mknods) to create a consistent namespace!
So, given the SC consistent namespace you simple add the raw devices into the ASM configuration, i.e. /dev/did/rdsk/dXsY. If you are using Solaris Volume Manager, you would use /dev/md/<setname>/rdsk/dXXX and if you were using CVM/VxVM you would use /dev/vx/rdsk/<dg_name>/<dev_name>.
Of course, if you genuinely are using Clusterware on its own, then you have somewhat of a management issue! ... time to think about installing SC?
Tim
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We are running oracle rac on 10.2.0.3 linux Itanium platform. I am setting up TDE for the first time and I setup my wallet location to be on an ocfs file system so that each node in the cluster will have access to the key. Is that all we will need to do and is this a supported configuration for TDE in a rac environment?
Do you have to open the wallet on each instance during instance startup when running rac?
Also we have a physicla standby server configured and I setup the same wallet location on the physicla standby and copied the wallet file over, Is that all we need to do for the standby server?
Thanks.Peter,
Good info and your video makes everything look easy.
In addition to the encrypted wallet file (ewallet.p12), I also have a cwallet.sso file in the local file system (not ACFS) on both RAC nodes of my Primary and both Standby nodes.
If I start the database and then run: SELECT * FROM V$ENCRYPTION_WALLET; it says the wallet status is open. However, as soon as a user tries to connect through our application (using jdbc), I get the "ORA-28365: wallet is not open" errors in the alert log. So then I have to run: ALTER SYSTEM SET ENCRYPTION WALLET OPEN IDENTIFIED BY "<Wallet Password>"; on each node and then users can connect through the application.
Any ideas why auto-login doesn't work and why everything is grayed out on the Wallet Tab drop down menu in OWM?
Thanks. -
Can we run 11g RAC and 12c RAC in the same server?
There is a requirement to run 11g RAC and 12C RAC in the same server for a year or so and then remove 11g RAC?
Current setup:
HP-unix 3 node RAC on 11g R2
4CPU
64 GB RAM
3 TB SAN storage
no ASM
Upgrade setup:
HP-unix 3 node RAC on 12C RAC
8CPU
128 GB RAM
6+ TB SAN storage
ASM
We are asked to use the same server and upgrade Hardware to install and run 12C RAC. What are the implications of running RAC in the same server/nodes?
Thank you for your time!Hi,
The following table shows you the compatibility between various versions:
Clusterware
ASM
DB
Certified
12.1
12.1
12.1
Y
12.1
12.1
11.2(a)
Y
12.1
12.1
11.1(a)
Y
12.1
12.1
10.2(a)
Y
11.2
11.2(b)
11.2
Y
11.2
11.2(b)
11.1
Y
11.2
11.2(b)
10.2
Y
11.1
11.1
11.1(c)
Y
11.1
11.1
10.2
Y
11.1
11.1
10.1
Y
11.1
10.2
11.1
Y
11.1
10.2
10.2
Y
11.1
10.2
10.1
Y
11.1
10.1(d)
11.1
Y
11.1
10.1(d)
10.2
Y
11.1
10.1
10.1
Y
10.2
10.2
10.2
Y
10.2
10.2
10.1
Y
10.2
10.1(d)
10.2
Y
10.2
10.1
10.1
Y
10.1
10.1
10.1
Y
(a) Pre-12.1 database instances require an ASM instance resident on the same node as the database instance. Pre-12.1 database instances cannot leverage the implicit HA of Flex ASM.
Oracle Clusterware (CRS/GI) - ASM - Database Version Compatibility (Doc ID 337737.1) -
Session Failover and Clustering
Let's say that we have two WebServers (NES) with the weblogic plugin (say WS1 and WS2) and a cluster with two WebLogicCommerce AppServers (say AS1 and AS2). Let's assume that each WebServer and AppServer runs on its own machine (total: 4 machines). Now, let's assume that the WebServer "obj.conf" files (on both WS1 and WS2) are setup so that they point to the servers in the cluster (WebLogicCluster="AS1:7601,AS2:7601").
When a new request comes in to one of the WebServers (say WS1), the plugin will route it to one of the AppServers using Round-Robin (say AS1). A session will now be initiated in AS1 and it sends a response back to the client.
Question 1: How does the other proxy in WS2 know that all future requests for this client need to be forwarded to AS1?
Question 2: For failover, does the cluster automatically replicate the session state existing in AS1 onto AS2 before sending the response (does AS2 automatically become the secondary)?
Now let's assume that AS1 crashes/dies. When the next request from the client comes to WS1 or WS2, they will forward it to AS1 (assuming that WS2 knows about the client session in AS1) . Since AS1 has crashed, will the client eventually get a timeout error message?
Question 3: To ensure that the session failover happens so that AS2 gets the request instead (becomes the primary), do we need to setup a WebLogic Proxy Server? If so, why can't the plugins for NES provide the failover themselves?
Thank you very much for your help!
Giri
Thank you very much for your responses. It has been very helpful and I am clear on the session/clustering stuff. I have new questions on EJB and clustering which I will post as a separate thread.
Giri
"Jason Rosenberg" <[email protected]> wrote:
>And also, if the browser has cookies disabled, it is important for
>the app server to embed the WebLogicSession info via url rewriting,
>otherwise the proxy or NES will not be able to route the session
>properly.
>
>So, in all http responses, be sure to pass the url string through
>response.encodeURL(). This will do the right thing depending
>on whether cookies are enabled or not.
>
>I've just only recently figured this out. Haven't actually tried it
>all out yet, so forgive me if it is not quite this simple, but this
>seems to be the gist of it...
>
>Jason
>
>
>"Justin James" <[email protected]> wrote in message news:[email protected]...
>>
>> Giri,
>>
>> I'm not a weblogic representative, but I tried to replicate this proxing service inside a load balancing switch(BigIP) and I
>discovered a few things. The weblogic server sets a cookie (WebLogicSession)that the webserver plugin uses to manage the proxying.
>The cookie (found in the HTTP header information) contains encoded information about the primary and secondary application servers
>that the session is bound too. Any web server can read the cookie to determine how to dispatch the request to the primary server.
>If the primary server does not respond, the request is forwarded to the secondary server by the plugin. Regardless of cluster size,
>the session is replicated to only one other server.
>>
>> <[email protected]> wrote:
>> >Giri Alwar wrote:
>> >
>> >> I need a couple of clarifications. First with regard to Question 1, I understand that plugins provide load balancing and
>failover but what I really was asking is how the plugin in WS2 knows that a session for the client has been initiated in AS1 as a
>result of WS1 sending the initial request to AS1. If WS2 gets a future request from the client, it needs to know this to send the
>request to AS1. Does the plugin talk to the cluster to find out if there is a primary and who it is?
>> >>
>> >
>> >> I should have clarified that my other questions pertain to in-memory replication. If I do not persist the session in a database
>then does the client get an error message (timeout) when AS1 goes down (assuming we use NES with the WebLogic plugin)?
>> >
>> >Plugins' know how to route requests based on cookies. If it can't reach the primary server it will automatically try secondary.
>In your case it doesn't matter if it reaches to proxy 1 or proxy 2, it is still the same.
>> >
>> >- Prasad
>> >
>> >> To prevent this error message and achieve failover, do I need to use WebLogic as the proxy server? If so, why isn't the NES
>plugin doing this?
>> >
>> >> Thanks.
>> >> Giri
>> >>
>> >> Prasad Peddada <[email protected]> wrote:
>> >> >Giri Alwar wrote:
>> >> >
>> >> >> Let's say that we have two WebServers (NES) with the weblogic plugin (say WS1 and WS2) and a cluster with two
>WebLogicCommerce AppServers (say AS1 and AS2). Let's assume that each WebServer and AppServer runs on its own machine (total: 4
>machines). Now, let's assume that the WebServer "obj.conf" files (on both WS1 and WS2) are setup so that they point to the servers
>in the cluster (WebLogicCluster="AS1:7601,AS2:7601").
>> >> >>
>> >> >> When a new request comes in to one of the WebServers (say WS1), the plugin will route it to one of the AppServers using
>Round-Robin (say AS1). A session will now be initiated in AS1 and it sends a response back to the client.
>> >> >>
>> >> >> Question 1: How does the other proxy in WS2 know that all future requests for this client need to be forwarded to AS1?
>> >> >
>> >> > Plugin takes care of load balancing and failover, it is all transparent to the client.
>> >> >
>> >> >
>> >> >> Question 2: For failover, does the cluster automatically replicate the session state existing in AS1 onto AS2 before sending
>the response (does AS2 automatically become the secondary)?
>> >> >
>> >> > If you have only two yes it is automatically your secondary. Yes, replication is synchronous.
>> >> >
>> >> >>
>> >> >> Now let's assume that AS1 crashes/dies. When the next request from the client comes to WS1 or WS2, they will forward it to
>AS1 (assuming that WS2 knows about the client session in AS1) . Since AS1 has crashed, will the client eventually get a timeout
>error message?
>> >> >
>> >> > If you are using some kind of persistence then you will be able to retrieve the session information and since the server
>is not available the request will automatically failover.
>> >> >
>> >> >> Question 3: To ensure that the session failover happens so that AS2 gets the request instead (becomes the primary), do we
>need to setup a WebLogic Proxy Server? If so, why can't the plugins for NES provide the failover themselves?
>> >> >
>> >> > No, you need only one. Either NES or weblogic proxy.
>> >> >
>> >> >
>> >> >> Thank you very much for your help!
>> >> >> Giri
>> >> >
>> >> >- Prasad
>> >> >
>> >
>>
>
>
-
We have a RAC running for two instances , we have noticed that one trigger on update which is using a sequences to get ids is not allocating such sequences
on sequence as expected , is every instance of RAC caching a set of sequences and the other instance have no idea about this , is this a configuration which has
to be done at RAC levelsayantan chakraborty wrote:
what is the difference between RAC and Oracle clusterware?RAC = Oracle Real Application Clusters
http://www.oracle.com/technology/products/database/clusterware/clusterware_for_unbreakable_linux_faq.html#
In the event of a system failure, clustering ensures high availability to users. Redundant hardware components, such as additional nodes, interconnect, and disks, allow the cluster to provide high availability. Such redundant hardware architectures avoid single points-of-failure and provide exceptional fault resilience.
In Oracle Real Application Clusters (RAC) environments, Oracle Clusterware monitors and manages Real Application Cluster databases. When a node in the cluster is started, all instances, listeners and services are automatically started. If an instance fails, the clusterware will automatically restart the instance, so that the service is often restored before the administrator notices it was down. In this sense Oracle Clusterware is the basis for Oracle Real Application Clusters.
In those environments RAC ensures the continuous operation of the database as well as its scalability by running more than one database instance simultaneously, typically one on every node in the cluster.
You cna
how to get RAC 10g?What did you mean?
If you mean Software:
http://www.oracle.com/technology/software/index.html
Docs:
http://www.oracle.com/technology/products/database/clustering/index.html
http://www.oracle.com/pls/db102/portal.portal_db?selected=16
Or Search on Google
http://www.google.co.th/search?rlz=1C1GGLS_thTH327TH327&sourceid=chrome&ie=UTF-8&q=Oracle+Real+Application+Cluster
Good Luck -
OCM RAC Physical dataguard setup
Hi
I am preparing for the OCM examination and have gone through the detailed course outline but i am not clear on the following things.
OCM exam topic is very broad and the course outline does not cover topics in detail.
Suppose the examiner asks me to setup a RAC physical standby for RAC primary database this is going to take a lot of time and without my toolkit it is going to take a lot of time.
Currently the strategy i want to use for this kind of exam is have lot of things automated including shell tricks like aliasing example alias startup and the database gets started etc .But i guess these tools would not be allowed in the OCM exam.
I agree peeking into the documentation is allowed but in my humble opinion my college professor used to call these open book exam but many candidates who opened the book felt they never had time to compete the exam so i am kind of skeptical on this.
So do i use Oracle enterprise manage grid control to do things quickly ?
Practice on my home laptop with Enterprise Manger Grid Control (GC) ? to make things faster ?
If i need to install RAC and GC then probably i don't have a choice but if the question is to setup streams then probably GC is faster so confronted with a streams environment do i go ahead and use streams is that legal ?
Is that a good strategy ?
regards
P.S:Is it oaky to ask such a tactical question on this forum ?
Edited by: hrishy on Nov 4, 2009 3:10 AMhrishy wrote:
My curiosity for OCM exam stems from the fact that setting up RAC physical standby with RAC primary would be a time consuming task and may not be feasible within the given time frame if i am ever asked to do so in the exam .You can be pretty confident that the exam will provide adequate time to do everything that is needed - if you are comfortable with the process, and the commands, based on experience.
If you need to read (study) the provided documentation at exam time to find out basic command syntax or to figure out the methods on the fly, then you will certainly run out of time. In other words, you should not ordinarily need to refer to the documentation by the time, other than to verify something that you may have confused due to pressure/stress.
Not sure what you are saying about pre-canned scripts. You can rest assured that you will not be allowed to
I was not going to comment about the specific scenario you mention. However, I do reiterate that they do not expect OCMs to be superhuman - just very competent and experienced. And I do question where you get the "Data Guard on a RAC DB" connection? (Data Guard, yes ... but tied to RAC?) -
R12 Apps with 4 node RAC and 4 apps nodes - Post Install check list
Hi All,
We have a new Oracle Apps R12 instalaltion with 4 node RAC and 4 Apps nodes with load balancing and external web tier being done by an outside firm. We are assigned the responsibility of checking that everything has been configured properly both on the RAC side and Apps side. I haven't worked on RAC earlier. Please let me know what all need to be checked before approving the install done by the outside firm.
Thank you!Please check below metalink notes
RAC Assurance Support Team: RAC and Oracle Clusterware Starter Kit and Best Practices (Generic) [ID 810394.1]
Using Oracle 10g Release 2 Real Application Clusters and Automatic Storage Management with Oracle E-Business Suite Release 12 [ID 388577.1]
Using Oracle 11g Release 2 Real Application Clusters with Oracle E-Business Suite Release 12 [ID 823587.1]
Oracle E-Business Suite and Oracle Real Application Clusters Documentation Roadmap [ID 745759.1]
745759.1 Oracle E-Business Suite and Oracle Real Application Clusters Documentation Roadmap
384248.1 Sharing The Application Tier file system in Oracle E-Business Suite Release 12
387859.1 Using AutoConfig to Manage System Configurations with Oracle E-Business Suite Release 12
406982.1 Cloning Oracle Applications Release 12 with Rapid Clone
240575.1 RAC on Linux Best Practices
265633.1 Automatic Storage Management Technical Best Practices
Loadbalancer
note 380489.1 Using Load-Balancers with Oracle E-Business Suite Release 12
note 727171.1 Implementing Load Balancing On Oracle E-Business Suite - Documentation For Specific Load Balancer Hardware
note 601694.1 How To Check Session Persistence On BigIP F5 And Cisco Ace Load Balancer Appliances
note 603325.1 Using Cisco ACE Series Application Control Engine with Oracle E-Business Suite Release 12
Installation R12
note 761564.1 Oracle Applications Installation and Upgrade Notes Release 12 (12.1.1) for Linux x86
note 402310.1 Oracle Applications Installation and Upgrade notes Release 12 (12.0) for Linux (32-bit)
note 559518.1 Cloning Oracle E-Business Suite Release 12 RAC-Enabled Systems with Rapid Clone
note 735276.1 Interoperability notes E-Business Suite R12 with Oracle Database 11gR1
Shared Applications Confiugurations:
note 380483.1 Oracle E-Business Suite Release 12 Additional Configuration and Deployment Options
note 384248.1 Sharing The Application Tier File System in Oracle E-Business Suite Release 12
Edited by: Amigo on Dec 20, 2010 9:58 AM -
Hi,
I am trying to understand the connection between RAC and Grid Computing.
In RAC, we can have multiple instance of the same physical database and if all these instances are running on n* separate machines then we have n+ set of processes to take care of computation.
Isn't this summarise the Grid computing as well or is it something entirely different. Please share.
Thanks in AdvanceHi,
Billy already answered well.
Litte Note:
Timeline of Oracle Databases:
1992: Oracle version 7 appeared with support for referential integrity, stored procedures and triggers.
1997: Oracle Corporation released version 8, which supported object-oriented development and multimedia applications.
1999: The release of Oracle8i aimed to provide a database inter-operating better with the Internet (the i in the name stands for "Internet"). The Oracle8i database incorporated a native Java virtual machine (Oracle JVM, aka "Aurora").
2001: Oracle9i went into release with 400 new features, including the ability to read and write XML documents. 9i also provided an option for Oracle RAC, or "Real Application Clusters", a computer-cluster database, as a replacement for the Oracle Parallel Server (OPS) option.
2003: Oracle Corporation released Oracle Database 10g, which supported regular expressions. (The g stands for "grid"; emphasizing a marketing thrust of presenting 10g as "grid computing ready".)
2005: Oracle Database 10.2.0.1—aka Oracle Database 10g Release 2 (10gR2)—appeared.
2007: Oracle Corporation released Oracle Database 11g for Linux and for Microsoft Windows.
Future (*Just a guess*): Oracle Database will release version 12c. (The c stands for "cloud"; emphasizing a marketing thrust of presenting 12c as "Cloud Computing ready".)
Oracle has released products with "C" of the "Cloud" (e.g Oracle Enterprise Manager 12c)
http://en.wikipedia.org/wiki/Oracle_Database
Regards,
Levi Pereira
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