How similar is HACMP to Oracle RAC?

Gurus:
Have you compared HACMP with Oracle RAC? If so, could you share the difference and the similarity?
Thanks!

Hi Linda,
seems to be a likewise question as
How similar is HACMP to MSCS?
In fact, you use them together:
Note 527843 - Oracle RAC support in the SAP environment
Markus

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What exactly is a Livecache and how different is it from Oracle RAC?

What exactly is Livecache and how different is it from Oracle RAC since livecache is used for high availability? and should Livecahe be used only with MAXDB?

As per my knowledge this both are completly different concepts and have different use.
SAP Livecache is used in SAP SCM/APO to increase speed of processing by using main memeory
Whereas Oracle RAC is used for HA and scalability.

How locking take place in oracle rac environment?

how locking take place in oracle rac environment?
Suppose from one session, user is updating and from other session same rows are being selected then how this locking take place in Oracle RAC?

user11936985 wrote:
how locking take place in oracle rac environment?
Suppose from one session, user is updating and from other session same rows are being selected then how this locking take place in Oracle RAC?In the case of one session updating and the other selecting, there is no locking issue, regardless of whether it's single instance or RAC.
The update will take appropriate table (TM) and row-level (TX) locks, but the select will not take any locks (unless it's a select for update), so, there should be no problem.
Oracle will use read consistency to guarantee that the selected results are self-consistent and consistent with the point in time of the start of the query.
Hope that helps,
-Mark

HACMP and Oracle RAC

Hello All,
I want to install Oracle 11g R2 on AIX 6.1.
After doing some researches i found that there are some documents mentioning that HACMP should not be installed while installing Oracle RAC.
what is the use of HACMP ? Is it optional ? when should be installed and when not?
Please can you provide me all details abut HACMP and how it affects ORACLE RAC 11g R2 installation on AIX??
Regards,

NB wrote:
Hello All,
I want to install Oracle 11g R2 on AIX 6.1.
After doing some researches i found that there are some documents mentioning that HACMP should not be installed while installing Oracle RAC.
what is the use of HACMP ? Is it optional ? when should be installed and when not?
Please can you provide me all details abut HACMP and how it affects ORACLE RAC 11g R2 installation on AIX??
Regards,
Hi,
HACMP is vendor clusterware (IBM technology) for cluster it is High Availability Cluster Multi Processing. When installing Oracle RAC it must installed on top of vendor clusterware.
HACMP comes in play when you use raw logical volume and it needs to be managed by HACMP.
Since 10g it is not mandatory to use HACMP so you can choose not to use it and let Oracle manage all the cluster services
Hope this helps
Cheers

How fragment a table in Oracle RAC

Hello to all
I have to use a DB cluster in a project, I'm using Oracle RAC for this but i have a question, is it posible to fragment tables in Oracle RAC? If this is possible, how can I do it?
Thanks all for your help.

If by "fragment" you mean doing what is typically referred to as "sharding" and storing different subsets of the table on different nodes, no, you can't.
Unlike how many databases do clustering with a "shared nothing" architecture, a RAC cluster involves multiple instances (software processes running on each node) to access a single database (set of data files) on a shared storage system. Sharding a table in this context doesn't make sense-- every instance is going to have access to the entire table. Sharding makes sense in other approaches to clustering where the storage system is not shared across multiple nodes.
If you are trying to ensure that different nodes don't conflict with each other when requesting particular blocks, or at least to minimize that contention, you can potentially create different services that run on different nodes and have different users connect to those services. So, for example, if you create a different service for different geographic regions, configured those services to run on particular nodes, configured users in those geographic regions to connect to the service appropriate for their region and the data in a table is naturally separated by region, you would end up with each node preferentially caching blocks that have data associated with their particular region and you would have relatively few cache fusion requests where one node asks for a cached block from a different node.
If you are trying to improve query performance, you can use partitioning instead of sharding the data (you can do this without using RAC as well). This allows Oracle to store different subsets of the data for a table in different physical segments so your queries can hit individual partitions rather than the entire table to retrieve the data they're after.
Justin

HOW INCREASE SGA IN ORACLE RAC 10 G WITH 2 NODES

How increase sga_max_size, sga_target in ORACLE RAC 10 G WITH 2 NODES;
i have oracle 10g in unix hp-ux 11i in rac (2 nodes)
with sga 8g; and i want to increase 12g;
i can alter these parameters without shutdown the entire database ?; , i can alter and take these change in one node first and later de second node?
i used in first node :
1- alter system set sga_max_size=16g scope spfile;
2- alter system set sga_targer=12g cope spfile;
later i restard all intance one by one:
srcvtl stop instance -d my_database -i my_instance1 -o immediate;
srcvtl start instance -d my_database -i my_instance1
3- in second node.
srcvtl stop instance -d my_database -i my_instance2 -o immediate;
srcvtl start instance -d my_database -i my_instance2
but my sga is the SAME 8G.. WHY NOT CHANGE...
i changed these parameters and restar my instance in first node later stop and start using srvctl the second node but my sga not change. continue in 8g ;however these changes are in spfile so;
prd2.sga_max_size=8589934592#internally adjusted
prd1.sga_max_size=8589934592#internally adjusted
*.sga_max_size=17179869184
prd2.sga_target=8589934592
prd1.sga_target=8589934592
*.sga_target=12884901888
prd2.thread=2
prd1.thread=1
how i can apply these change node by node or i need shutdown the entire database?
need to make these changes without affecting my application because i can not shutdown the both node...
Edited by: user568681 on 02-sep-2010 14:32

Hi,
I just checked on a test RAC configuration (HP-UX, 10.2.0.4)
You don't need to stop the database.
Keep your "rolling" original scenario but change :
alter system set sga_max_size=16g scope spfile;
alter system set sga_target=12g cope spfile;by
alter system set sga_max_size=16g scope spfile sid = 'PRD1';
alter system set sga_target=12g scope spfile sid = 'PRD1';
alter system set sga_max_size=16g scope spfile sid = 'PRD2';
alter system set sga_target=12g cope spfile sid = 'PRD2';Actually
alter system set sga_max_size=16g scope spfile;
alter system set sga_max_size=16g scope spfile SID='*';changes globally the values for every instance in the spfile ("*.XXXXXX" is updated) but it does not remove the specific entries already assigned to one particular instance (and it is your case !)
Alternatively you could reset the values assigned specifically to one instance with "alter system reset" to have only "*.XXXX" for those parameters.
Best regards
Phil

IBM HACMP Vs. Oracle Real Application Cluster

Hello,
We are contemplating chages in our Oracle Database on AIX. I was wondering if you can point me to a site that will help us to decide which architectiure to go with between IBM HACMP Vs. Oracle Real Aplication Cluster.
Any information will be appreciated.
Regards,

Hoep this helps,
http://www.google.com/#hl=en&q=+site:ibm.com+IBM+HACMP+Vs.+Oracle+RAC
Regards
http://www.oracleracexpert.com

In oracle rac, If user query a select query and in processing data is fetched but in the duration of fetching the particular node is evicted then how failover to another node internally?

In oracle rac, If user query a select query and in processing data is fetched but in the duration of fetching the particular node is evicted then how failover to another node internally?

The query is re-issued as a flashback query and the client process can continue to fetch from the cursor. This is described in the Net Services Administrators Guide, the section on Transparent Application Failover.

How to create a wallet in oracle RAC environment

How to create a wallet in oracle RAC environment.
While running following command "alter system set encryption key identified by "thalesdata4";
I am getting error message "cannot auto create wallet" or "failed to open wallet.
Please suggest correct way to create a wallet in RAC environment.
Thanks
Sudhir

hi,
please refer for detailed explanation
Master Note for SSL Configuration in Fusion Middleware 11g [ID 1218695.1]
regards

How to install oracle rac on linux using virtualbox

Hi,
I have recently started working on oracle rac
I have system with 64 bit os windows 7 installed
core i3 processor with 6 gb of ram
I want to install grid infrastructure on linux running as a virtual machine
how can I install and configure it? Please help me .
can ubuntu work as a virtual machine for oracle rac?

Hi,
I suggest you use Oracle Enterprise Linux on your lab. There are a lot of step-by-step guide to install RAC on OEL. A good example is by Tim Hall, search Google for "Tim Hall Oracle Database RAC Installation".

How to configure sun application server 8.2 for Oracle RAC 10g

Hello,
We have numerous boxes running the sun platform application server 8.2 and 2 boxes running enterprise version 8.2 all connecting to a 4 node Oracle RAC 10 G release 2 database. We have the system up and working. The application servers are connecting just fine to the database and the apps don't have any problems querying, inserting, etc. However, when we try to do failover testing of situations when a node or nodes of the Oracle RAC database goes down the application server does not gain new valid connections. Our configuration is this, OracleDataSource for the data source, table validation turned on with a valid table, ONS configuration set in properties, connectionCache enabled, and fastconnectionfailover enabled as well in the properties. We have that long oracle rac url with load balancing turned on set fot the database URL. We have the checkbox checked to fail all connections on any failure. ONS is configured properly within the database because we have a java application that runs outside of the application server that uses all the same settings described above (only set manually in our code for the OracleDataSource). This application works seemlessly when DB nodes are shutdown. We can shutdown all but one node and it's still humming along without skipping a beat. Start up one of the others, kill the last node, it still hums along nicely without skipping a beat. We'd really like to get the applications running in the application server to work the same way. Any help would be greatly appreciated. We've tried all the combinations that we can think of with configuration settings in the application server and it never works. Am tempted to rip out the database connection pool from inside the application server and configure it manually in the code but we are using entity beans and this is the much easier approach, if it will work. It's down to the point of does sun application server actually work with oracle RAC for connection failovers.

Hi,
We are also facing similar execption. Here is the error, we are getting, when a node is failed on RAC.
[#|2007-11-11T12:43:53.685+0000|WARNING|sun-appserver-ee8.1_02|javax.enterprise.system.core.transaction|_ThreadID=38;|JTS5041: The resource manager is doing work outside a global transaction
oracle.jdbc.xa.OracleXAException
at oracle.jdbc.xa.OracleXAResource.checkError(OracleXAResource.java:1270)
at oracle.jdbc.xa.client.OracleXAResource.start(OracleXAResource.java:318)
at com.sun.gjc.spi.XAResourceImpl.start(XAResourceImpl.java:184)
at com.sun.jts.jta.TransactionState.startAssociation(TransactionState.java:258)
at com.sun.jts.jta.TransactionImpl.enlistResource(TransactionImpl.java:181)
at com.sun.enterprise.distributedtx.J2EETransaction.enlistResource(J2EETransaction.java:397)
at com.sun.enterprise.distributedtx.J2EETransactionManagerImpl.enlistResource(J2EETransactionManagerImpl.java:312)
at com.sun.enterprise.distributedtx.J2EETransactionManagerOpt.enlistResource(J2EETransactionManagerOpt.java:114)
at com.sun.enterprise.resource.ResourceManagerImpl.registerResource(ResourceManagerImpl.java:113)
at com.sun.enterprise.resource.ResourceManagerImpl.enlistResource(ResourceManagerImpl.java:71)
at com.sun.enterprise.resource.PoolManagerImpl.getResource(PoolManagerImpl.java:176)
at com.sun.enterprise.connectors.ConnectionManagerImpl.internalGetConnection(ConnectionManagerImpl.java:268)
at com.sun.enterprise.connectors.ConnectionManagerImpl.allocateConnection(ConnectionManagerImpl.java:193)
at com.sun.enterprise.connectors.ConnectionManagerImpl.allocateConnection(ConnectionManagerImpl.java:122)
at com.sun.gjc.spi.DataSource.getConnection(DataSource.java:70)
at com.syntegra.nasp.etp.dax.DBManager.getConnection(DBManager.java:192)
at com.syntegra.nasp.etp.dax.DBManager.createDBCommand(DBManager.java:241)
at com.syntegra.nasp.etp.dax.DBManager.createDBCommand(DBManager.java:251)
at com.syntegra.nasp.etp.dax.sp.SPS_PRESCRIPTION_GUID_PROC.getCommand(SPS_PRESCRIPTION_GUID_PROC.java:31)
at com.syntegra.nasp.etp.dax.sp.SPS_PRESCRIPTION_GUID_PROC.execute(SPS_PRESCRIPTION_GUID_PROC.java:23)
at com.syntegra.nasp.etp.dax.PrescriptionBaseDataMapper.loadPresciptionByGUID(PrescriptionBaseDataMapper.java:203)
at com.syntegra.nasp.etp.model.PrescriptionBase.findByPrescriptionGUID(PrescriptionBase.java:176)
at com.syntegra.nasp.etp.messages.PatientPrescriptionReleaseRequest.execute(PatientPrescriptionReleaseRequest.java:120)
at com.syntegra.nasp.etp.service.ETPSLBean.processMessage(ETPSLBean.java:159)
at sun.reflect.GeneratedMethodAccessor97.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.sun.enterprise.security.SecurityUtil.invoke(SecurityUtil.java:147)
at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:128)
at $Proxy6.processMessage(Unknown Source)
at com.syntegra.nasp.etp.listener.RequestListener.onRequest(RequestListener.java:204)
at com.syntegra.spine.csf.consumer.mdb.CSFListenerRegisteringConsumer.onRequest(CSFListenerRegisteringConsumer.java:54)
at com.syntegra.spine.csf.consumer.mdb.CSFConsumerBase.invokeListener(CSFConsumerBase.java:267)
at com.syntegra.spine.csf.consumer.mdb.CSFConsumerBase.processMessage(CSFConsumerBase.java:180)
at com.syntegra.spine.csf.consumer.mdb.CSFConsumerBase.onMessage(CSFConsumerBase.java:102)
at sun.reflect.GeneratedMethodAccessor96.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.sun.enterprise.security.SecurityUtil$2.run(SecurityUtil.java:153)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.enterprise.security.application.EJBSecurityManager.doAsPrivileged(EJBSecurityManager.java:955)
at com.sun.enterprise.security.SecurityUtil.invoke(SecurityUtil.java:158)
at com.sun.ejb.containers.MessageBeanContainer.deliverMessage(MessageBeanContainer.java:956)
at com.sun.ejb.containers.MessageBeanListenerImpl.deliverMessage(MessageBeanListenerImpl.java:42)
at com.sun.enterprise.connectors.inflow.MessageEndpointInvocationHandler.invoke(MessageEndpointInvocationHandler.java:130)
at $Proxy9.onMessage(Unknown Source)
at com.sun.genericra.inbound.DeliveryHelper.deliverMessage(DeliveryHelper.java:183)
at com.sun.genericra.inbound.DeliveryHelper.deliver(DeliveryHelper.
Regards
Selvan.

How configure Tuxedo 8.1 to Oracle RAC 9.1

I need to configure Tuxedo 8.1 to work with Oracle RAC 9i, I saw that there's documentation to configure for Tuxedo 9i with Oracle RAC 10g. But this is not my scenario. If someone know how to do this, could send me some documentation or example to apply this. I already read ads.pdf from BEA dev2dev site and this documentation don't talk about Oracle 9i

Weverton,
Later versions of Oracle contain significant RAC-related features not
present in earlier versions of RAC, so Tuxedo
(For example, Oracle 10gR2 contains support for DTP services, and Oracle
10.1.0.3 contains support for Fast Application Notification.)
Because one or more of these features is required for RAC migration and
recovery in Tuxedo, Tuxedo offers support only for Oracle 10.1.0.3 and above
for general RAC architectures. (However, there are some specialized RAC
application architectures, such as architectures where only a single service
is called in each transaction and architectures where transactions are not
used where Tuxedo can work with Oracle 9i.) Significant improvements in
RAC have occurred with each Oracle release, so if it is possible to upgrade
to Oracle 10gR2 then you should do so.
Ed
<Weverton Castanho> wrote in message news:[email protected]..
I need to configure Tuxedo 8.1 to work with Oracle RAC 9i, I saw that
there's documentation to configure for Tuxedo 9i with Oracle RAC 10g. But
this is not my scenario. If someone know how to do this, could send me some
documentation or example to apply this. I already read ads.pdf from BEA
dev2dev site and this documentation don't talk about Oracle 9i

How an aplications sever will communicate with Oracle RAC?

Hi, I wonder how the applacations server will communicate with the two nodes Oracle RAC. Do I have to install an Oracle client to the application server and configure tnsname.ora file to connect with the nodes?
Have any one any experience to share and help me?

That depends on the driver being used. Here are some examples for the JDBC connections
url="jdbc:oracle:oci:@TNS_ALIAS"
url="jdbc:oracle:oci:@(DESCRIPTION=
(LOAD_BALANCE=on)
(ADDRESS=(PROTOCOL=TCP)(HOST=clusnode-1vip)(PORT=1521))
(ADDRESS=(PROTOCOL=TCP)(HOST=clusnode-2vip)(PORT=1521))
(ADDRESS=(PROTOCOL=TCP)(HOST=clusnode-3vip)(PORT=1521))
(ADDRESS=(PROTOCOL=TCP)(HOST=clusnode-4vip)(PORT=1521))
(CONNECT_DATA=(SERVICE_NAME=ERP)))"
url="jdbc:oracle:oci:@(DESCRIPTION=
(ADDRESS=(PROTOCOL=TCP)(HOST=clusalias)(PORT=1521))
(CONNECT_DATA=(SERVICE_NAME=ERP)))"
url="jdbc:oracle:thin:@(DESCRIPTION=
(LOAD_BALANCE=on)
(ADDRESS=(PROTOCOL=TCP)(HOST=clusnode-1vip)(PORT=1521))
(ADDRESS=(PROTOCOL=TCP)(HOST=clusnode-2vip)(PORT=1521))
(ADDRESS=(PROTOCOL=TCP)(HOST=clusnode-3vip)(PORT=1521))
(ADDRESS=(PROTOCOL=TCP)(HOST=clusnode-4vip)(PORT=1521))
(CONNECT_DATA=(SERVICE_NAME=ERP)))"
url="jdbc:oracle:thin:@(DESCRIPTION=
(ADDRESS=(PROTOCOL=TCP)(HOST=clusalias)(PORT=1521))
(CONNECT_DATA=(SERVICE_NAME=ERP)))"
If you are going to use FAN and FCF you may want to take a look at the following white paper.
http://www.oracle.com/technology/products/database/clustering/pdf/twpracwkldmgmt.pdf

How to migrate 4 TB Oracle databse RAC 10g R2 from Solaris to AIX

We have a datawarehouse Oracle RAC 10g 2 with 3 nodes (about 4TB) on Solaris 9 and we want to migrate it to AIX -- is RMAN or Transportable Tablespaces the best solution? How does it work? What are the possible problems?
Note: Actually RMAN is not use to backup.
Thank you

Hello,
Ideally RMAN is best option but in this case it will be complex but very possible. Cross platform restore using RMAN
See following oracle doumentation for more details and you can search metalink for more stepwise detailed instructions
http://download.oracle.com/docs/cd/B19306_01/backup.102/b14191/dbxptrn.htm#BRADV05432
Regards

HOW TO CONFIGURE ORACLE RAC USING EMC STORAGE MULTIPATHING

Dear Team,0
Am in process of installation of ORACLE RAC 10.2.0.3 using cluvfy 10.2.0.3 with EMC storage (multipathing)
need ur help..i had done with following things...
1)i had done with prerequisite steps..
2)user equivalence .
3)cluvfy checks...
4)in process to install ORACLE RAC but the storage assign to server is EMC Clarion but the disk assign is having same name but diffferent
major number minor number...
pls let me know..
1)major number minor number with repect to voting ,ocr and asm disk..
2)while configuring EMC storage how same mojor and minor number are assign(if possible compltee steps)
Thanks
Upendra
9820011875

Hi buddy,
You should start reading the installation guide for Your plataform. it's well explained there.
Regards,
Cerreia

How similar is HACMP to Oracle RAC?

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