Database instance on one node

Hi
Suppose i have two nodes in my RAC.
Is it possible to have two differents instances of database in one of my node ?
I mean for example, one instance for the test schema and one for the production schema ??
Thanks for answer

Hi
I agree with you except that for the moment, we don't know if we can handle to buy one production RAC and one test RAC.
So do u think having a production RAC and further dedicated test server can be a solution ?
Sometimes, we have to put test data to the same level than production data.
Today, we use snapshots with our bay, so it's very easy to populate a test server with fresh data.
But rac means to use OCFS, Raw devices or ASM. And our test database don't use any of this storage type. It's just simple datafiles on JFS file system.
So i asking myself how it is possible to save all objects of an instance cluster and duplicate it to our test database server ??

Similar Messages

ASM instance on one node can not startup

use dbca create database failure
[oracle@rac1 ~]$ dbca -silent -responseFile /home/oracle/dbca.rsp
Look at the log file "/opt/ora/product/10.2.0/db_1/cfgtoollogs/dbca/mydb.log" for further details.
[oracle@rac1 ~]$ cat "/opt/ora/product/10.2.0/db_1/cfgtoollogs/dbca/mydb.log"
PRKS-1009 : Failed to start ASM instance "+ASM2" on node "rac2", [CRS-0215: Could not start resource 'ora.rac2.ASM2.asm'.]
ORA-03135: connection lost contact
[oracle@rac2 bin]$ ./crs_stat -t
Name           Type           Target    State     Host
ora....SM1.asm application    ONLINE    ONLINE    rac1
ora....C1.lsnr application    ONLINE    ONLINE    rac1
ora.rac1.gsd   application    ONLINE    ONLINE    rac1
ora.rac1.ons   application    ONLINE    ONLINE    rac1
ora.rac1.vip   application    ONLINE    ONLINE    rac1
ora....SM2.asm application    ONLINE    OFFLINE
ora....C2.lsnr application    ONLINE    ONLINE    rac2
ora.rac2.gsd   application    ONLINE    ONLINE    rac2
ora.rac2.ons   application    ONLINE    ONLINE    rac2
ora.rac2.vip   application    ONLINE    ONLINE    rac2so i try to start asm instance on rac2
[oracle@rac2 bin]$ ./srvctl start asm -n rac2
PRKS-1009 : Failed to start ASM instance "+ASM2" on node "rac2", [PRKS-1009 : Failed to start ASM instance "+ASM2" on node "rac2", [rac2:ora.rac2.ASM2.asm:
rac2:ora.rac2.ASM2.asm:SQL*Plus: Release 10.2.0.1.0 - Production on Mon Jul 25 17:58:21 2011
rac2:ora.rac2.ASM2.asm:
rac2:ora.rac2.ASM2.asm:Copyright (c) 1982, 2005, Oracle. All rights reserved.
rac2:ora.rac2.ASM2.asm:
rac2:ora.rac2.ASM2.asm:Enter user-name: Connected to an idle instance.
rac2:ora.rac2.ASM2.asm:
rac2:ora.rac2.ASM2.asm:SQL> ORA-03113: end-of-file on communication channel
rac2:ora.rac2.ASM2.asm:SQL> Disconnected
rac2:ora.rac2.ASM2.asm:
CRS-0215: Could not start resource 'ora.rac2.ASM2.asm'.]]
[PRKS-1009 : Failed to start ASM instance "+ASM2" on node "rac2", [rac2:ora.rac2.ASM2.asm:
rac2:ora.rac2.ASM2.asm:SQL*Plus: Release 10.2.0.1.0 - Production on Mon Jul 25 17:58:21 2011
rac2:ora.rac2.ASM2.asm:
rac2:ora.rac2.ASM2.asm:Copyright (c) 1982, 2005, Oracle. All rights reserved.
rac2:ora.rac2.ASM2.asm:
rac2:ora.rac2.ASM2.asm:Enter user-name: Connected to an idle instance.
rac2:ora.rac2.ASM2.asm:
rac2:ora.rac2.ASM2.asm:SQL> ORA-03113: end-of-file on communication channel
rac2:ora.rac2.ASM2.asm:SQL> Disconnected
rac2:ora.rac2.ASM2.asm:check the alert log find
Mon Jul 25 17:58:23 2011
Maximum Tranmission Unit (mtu) of the ether adapter is different
on the node running instance 1, and this node.
Ether adapters connecting the cluster nodes must be configured
with identical mtu on all the nodes, for Oracle.
Please ensure the mtu attribute of the ether adapter on all
nodes are identical, before running Oracle.
Mon Jul 25 17:58:23 2011
Errors in file /opt/ora/admin/+ASM/bdump/+asm2_lmon_29711.trc:
ORA-27550: Target ID protocol check failed. tid vers=%d, type=%d, remote instance number=%d, local instance number=%d
LMON: terminating instance due to error 27550
Mon Jul 25 17:58:25 2011
Shutting down instance (abort)
License high water mark = 0
Mon Jul 25 17:58:28 2011
Instance terminated by LMON, pid = 29711
Mon Jul 25 17:58:30 2011
Instance terminated by USER, pid = 29831and i checked my eth
[root@rac1 oracle]# ifconfig -a
eth0      Link encap:Ethernet HWaddr 00:0C:29:3C:42:0C
          inet addr:192.168.40.102 Bcast:192.168.40.255 Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:9762 errors:0 dropped:0 overruns:0 frame:0
          TX packets:6028 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:1193646 (1.1 MiB) TX bytes:1037252 (1012.9 KiB)
          Interrupt:67 Base address:0x2400
eth0:1    Link encap:Ethernet HWaddr 00:0C:29:3C:42:0C
          inet addr:192.168.40.201 Bcast:192.168.40.255 Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          Interrupt:67 Base address:0x2400
eth1      Link encap:Ethernet HWaddr 00:0C:29:3C:42:16
          inet addr:10.10.17.221 Bcast:10.10.17.225 Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:30185 errors:0 dropped:0 overruns:0 frame:0
          TX packets:37936 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:19988844 (19.0 MiB) TX bytes:35126056 (33.4 MiB)
          Interrupt:51 Base address:0x2480
lo        Link encap:Local Loopback
          inet addr:127.0.0.1 Mask:255.0.0.0
          UP LOOPBACK RUNNING MTU:16436 Metric:1
          RX packets:52537 errors:0 dropped:0 overruns:0 frame:0
          TX packets:52537 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:4380651 (4.1 MiB) TX bytes:4380651 (4.1 MiB)
[root@rac2 ~]# ifconfig -a
eth0      Link encap:Ethernet HWaddr 00:0C:29:9C:CC:90
          inet addr:192.168.40.103 Bcast:192.168.40.255 Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:3665 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1489 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:563952 (550.7 KiB) TX bytes:243127 (237.4 KiB)
          Interrupt:67 Base address:0x2400
eth0:1    Link encap:Ethernet HWaddr 00:0C:29:9C:CC:90
          inet addr:192.168.40.202 Bcast:192.168.40.255 Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          Interrupt:67 Base address:0x2400
eth1      Link encap:Ethernet HWaddr 00:0C:29:9C:CC:9A
          inet addr:10.10.17.222 Bcast:10.10.17.225 Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:38281 errors:0 dropped:0 overruns:0 frame:0
          TX packets:29683 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:35182270 (33.5 MiB) TX bytes:19905266 (18.9 MiB)
          Interrupt:51 Base address:0x2480
lo        Link encap:Local Loopback
          inet addr:127.0.0.1 Mask:255.0.0.0
          UP LOOPBACK RUNNING MTU:16436 Metric:1
          RX packets:44387 errors:0 dropped:0 overruns:0 frame:0
          TX packets:44387 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:2299383 (2.1 MiB) TX bytes:2299383 (2.1 MiB)any idea ?
i try to run dbca on rac2 ,it seems OK
============
ASM instance still have problem,no ASM instance create in rac1
[oracle@rac2 bin]$ ./crs_stat -t
Name           Type           Target    State     Host
ora.mydb.db    application    ONLINE    ONLINE    rac1
ora....b1.inst application    ONLINE    OFFLINE
ora....b2.inst application    ONLINE    ONLINE    rac2
ora....SM1.asm application    ONLINE    OFFLINE
ora....C1.lsnr application    ONLINE    ONLINE    rac1
ora....C2.lsnr application    ONLINE    OFFLINE              => ora.rac1.LISTENER_RAC2.lsnr   (i do not know where this resource come from ??)
ora.rac1.gsd   application    ONLINE    ONLINE    rac1
ora.rac1.ons   application    ONLINE    ONLINE    rac1
ora.rac1.vip   application    ONLINE    ONLINE    rac1
ora....SM2.asm application    ONLINE    ONLINE    rac2
ora....C2.lsnr application    ONLINE    ONLINE    rac2
ora.rac2.gsd   application    ONLINE    ONLINE    rac2
ora.rac2.ons   application    ONLINE    ONLINE    rac2
ora.rac2.vip   application    ONLINE    ONLINE    rac2and here is my dbca.rsp file content
[GENERAL]
RESPONSEFILE_VERSION = "10.0.0"
OPERATION_TYPE = "createDatabase"
[CREATEDATABASE]
GDBNAME = "mydb.us.oracle.com"
SID = "mydb"
NODELIST=rac1,rac2
TEMPLATENAME = "/home/oracle/mydb.dbc"
SYSPASSWORD = "Myss123456"
SYSTEMPASSWORD = "Myss123456"
EMCONFIGURATION = "NONE"
DBSNMPPASSWORD = "Myss123456"
STORAGETYPE=ASM
DISKLIST=/dev/oracleasm/disks/VOL1,/dev/oracleasm/disks/VOL2
DISKGROUPNAME=ORADG
REDUNDANCY=EXTRENAL
DISKSTRING="/dev/oracleasm/disks/*"
ASM_SYS_PASSWORD="Myss123456"
LISTENERS = "listener1 listener2"Edited by: 859340 on 2011-7-24 下午7:23
Edited by: 859340 on 2011-7-24 下午7:32
Edited by: 859340 on 2011-7-24 下午7:35
Edited by: 859340 on 2011-7-24 下午7:51

Hi,
Use this tech note on MOS.
*Instance Crash on startup with ORA-27550: Target ID protocol check failed [ID 730516.1]*
Regards,
Levi Pereira

Multiple database instance on one server

Hi experts
We are planning to implement ERP, BI, Solman, CRM and MDSD on windows/oracle platform. There is an idea about system landscape that all database instance of production systems are installed on one server and central instances of each system are installed on separate servers. Is there any performance or maintenance risk about this scenario? What is the advanteges and disadvantages of this landscape? Shall we prefer central system installation?
I'm waiting for your recommandation.
Best Regards...

Hi,
From experience one disadvantage in having an Oracle farm, is if the server plays up
or needs a reboot you of course lose all the systems databases.
Also getting all customers to aggree a maintenance slot together can be a pain.
Failover needs to be considered, DR also.
IMHO separate servers, but that is my preference I'm sure there are advantages.
Mark

Policy Managed RAC database instance on different node

Dear All,
Recently we have upgrade our production database from 2 node 11.2.0.1/Solaris 10 Sparc to 2 node 12.1.0.2/Solaris 11.2 Sparc
earlier was Admin managed database, now we have created Policy managed database.
Instance_1 running on node_2
Instnace_2 running on node_1
how to switch the instance to correct node or what is the concept , why it running vice versa even though assign ORACLE_SID properly.
please clarify me.
oracle@zhovm-proddb2:/u01/app/12.1.0.2/grid/bin$ srvctl status database -d proddb
Instance proddb_1 is running on node zhovm-proddb2
Instance proddb_2 is running on node zhovm-proddb1
Thanks.

muba_zak wrote:
Thanks John,
How the cron jobs takes care, is there any different is there between Admin Managed & Policy Managed
Thanks.
Muba
I don't know what your cron jobs do. If (for example) they logon to the database through a service published by the scan listeners, they will be happy. If they logon using a deterministic connect string, you have a problem - a problem caused by mis-using the system.

Database starting on one node.

Hi All,
After reboot of server and ssh key gen. My RAC instance is running only on one node.
What can be problem?
Thanks.

Only you know what can be problem, because only you have valuable inforamation. :)
- Have you checked CRS-related logs?
- Have you checked Oracle alert log and related background process trace files?
If anything interesting found, post and let us know.

Multiple databases/instances on 4-node RAC Cluster including Physical Stand

OS: Windows 2003 Server R2 X64
DB: 10.2.0.4
Virtualization: NONE
Node Configuration: x64 architecture - 4-Socket Quad-Core (16 CPUs)
Node Memory: 128GB RAM
We are planning the following on the above-mentioned 4-node RAC cluster:
Node 1: DB1 with instanceDB11 (Active-Active: Load-balancing & Failover)
Node 2: DB1 with instanceDB12 (Active-Active: Load-balancing & Failover)
Node 3: DB1 with instanceDB13 (Active-Passive: Failover only) + DB2 with instanceDB21 (Active-Active: Load-balancing & Failover) + DB3 with instanceDB31 (Active-Active: Load-balancing & Failover) + DB4 with instance41 (Active-Active: Load-balancing & Failover)
Node 4: DB1 with instanceDB14 (Active-Passive: Failover only) + DB2 with instanceDB22 (Active-Active: Load-balancing & Failover) + DB3 with instanceDB32 (Active-Active: Load-balancing & Failover) + DB4 with instance42 (Active-Active: Load-balancing & Failover)
Note: DB1 will be the physical primary PROD OLTP database and will be open in READ-WRITE mode 24x7x365.
Note: DB2 will be a Physical Standby of DB1 and will be open in Read-Only mode for reporting purposes during the day-time, except for 3 hours at night when it will apply the logs.
Note: DB3 will be a Physical Standby of a remote database DB4 (not part of this cluster) and will be mounted in Managed Recovery mode for automatic failover/switchover purposes.
Note: DB4 will be the physical primary Data Warehouse DB.
Note: Going to 11g is NOT an option.
Note: Data Guard broker will be used across the board.
Please answer/advise of the following:
1. Is the above configuration supported and why so? If not, what are the alternatives?
2. Is the above configuration recommended and why so? If not, what are the recommended alternatives?

Hi,
As far as i understand, there's nothing wrong in configuration except you need to consider below points while implementing final design.
1. No of CPU on each servers
2. Memory on each servers
3. If you've RAC physical standby then apply(MRP0) will run on only one instance.
4. Since you are configuring physical standby for on 3rd and 4th nodes of DB1 4 node cluster where DB13 and DB14 instances are used only for failver, if you've a disaster at data center or power failure in entire data center, you are losing both primary and secondary with an assumption that your primary and physical standby reside in same data center so it may not be highly available architecture. If you are going to use extended RAC for this configuration then it makes sense where Node 1 and Node 2 will reside in Datacenter A and Node 3 ,4 will reside in Datacenter B.
Thanks,
Keyur

Database instance on 2 nodes fails to start due to ORA-07452

Hello All,
windows 64 bit 5 node rac ..10.2.0.3
We have an issue and this happens weekly once without fail for the last 3-4 weeks.
Everyday we have an expdp from production and and impdp script which imports that data into our test env.
Before the import starts there is a script which bringds down the database, puts into no archive log mode, starts the database up and kicks the import. Once import is done, it will again bring down the db, put it in archive log and start the entire db.
This works perfectly on everyday other than weekends (fri or sat..we are in middle east - Dubai). Over the weekend, the db goes down, put it in no archive log and when it tries to bring up the db, about 2 or 3 instances fail to come up with
Fri Nov 23 22:12:32 2007
Errors in file d:\oracle\product\10.2.0\admin\ajcprd\bdump\ajcprd4_reco_3324.trc:
ORA-07452: specified resource manager plan does not exist in the data dictionary
Fri Nov 23 22:12:34 2007
Instance terminated by USER, pid = 5520
ORA-1092 signalled during: ALTER DATABASE OPEN...
Import also fails to continue even though the node(and instance) on which the script executes is up and running.
We have not set resource manager plan.
Any help or assistance would be appriciated...
Thanks

Address this issue to Oracle Support.
Looks like some of old bugs comes to light again.
See Note:1787295.8 or Note:178987.1 for details.
Best Regards,
Alex

Multiple database instance for one user in Oracle XE

Hello,
I would like to know if there is a way to create more than one database/schema for the same user in Oracle XE.
Thanks.

And i say...
yes, indeed.. you can find out some info here..
http://www.oracle.com/technology/pub/articles/cunningham-database-xe.html

Instances in one node runningi in Oracle Clustster on Windows 2008 r2 VM

Helo,
I have created a Oracle 11g (11.2.0.2)cluster in windows 2008 r2 Environment in Vm
I have created the dbs also and every thing was working fine.
But after restarting the nodes instences in 1 node is not starting. 1 node is up so i can connect to DB.
when i do srvctl:
instance testdb1 is running on node xd-oradbb1-vm
instance testdb2 is not running on node xd-oradbb1-vm
srvct node apps - No Errors
crsctl - Both are online No Errors
When I try to start Below is the erro I am getting
The resource action "ora.testdb.db start"
encountered the following error:
ORA-00119: invalid specification for system parameter REMOTE_LISTENER
ORA-00132:
syntax error or unresolved network name 'RIE-ORADB-SCAN:1521'
Host file entries are :
#PUBLIC
10.53.52.41     XX-ORADBN1-VM.arg.internal          XX-ORADBN1-VM
10.53.52.42     XX-ORADBN2-VM.arg.internal          XX-ORADBN2-VM
#PRIVATE
10.1.1.41     XX-ORADBN1-VM-PRIV.arg.internal     XX-ORADBN1-VM-PRIV
10.1.1.42     XX-ORADBN2-VM-PRIV.arg.internal     XX-ORADBN2-VM-PRIV
#VIRTUAL
10.53.52.43     XX-ORADBN1-VM-VIP.arg.internal          XX-ORADBN1-VM-VIP
10.53.52.44     XX-ORADBN2-VM-VIP.arg.internal          XX-ORADBN2-VM-VIP
#SCAN ID
10.53.52.45     XX-ORADB-SCAN.arg.internal          XX-ORADB-SCAN
10.53.52.46     XX-ORADB-SCAN.arg.internal          XX-ORADB-SCAN
10.53.52.47     XX-ORADB-SCAN.arg.internal          XX-ORADB-SCAN
Listener entry
LISTENER_SCAN3=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER_SCAN3))))          # line added by Agent
LISTENER_SCAN2=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER_SCAN2))))          # line added by Agent
LISTENER=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER))))          # line added by Agent
LISTENER_SCAN1=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER_SCAN1))))          # line added by Agent
ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER_SCAN1=ON          # line added by Agent
ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER=ON          # line added by Agent
ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER_SCAN2=ON          # line added by Agent
ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER_SCAN3=ON          # line added by Agent
Kindly help, I have created Oracle RAC Environment by refering the documents and and I am a beginner.
Thanks,
Rajesh

Node1 (In this node it is up)
D:\app\11.2.0\grid\NETWORK\ADMIN
SQLNET.AUTHENTICATION_SERVICES= (NTS)
NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)
ADR_BASE = D:\app\oraadmin
D:\app\oraadmin\product\11.2.0\dbhome_1\NETWORK\ADMIN
SQLNET.AUTHENTICATION_SERVICES = (NTS)
remote_listener=RIE-ORADB-SCAN:1521
Node2 (not up)
D:\app\11.2.0\grid\NETWORK\ADMIN
SQLNET.AUTHENTICATION_SERVICES= (NTS)
NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)
ADR_BASE = D:\app\oraadmin
D:\app\oraadmin\product\11.2.0\dbhome_1\NETWORK\ADMIN
SQLNET.AUTHENTICATION_SERVICES= (NTS)
NAMES.DIRECTORY_PATH= (TNSNAMES)
remote_listener=RIE-ORADB-SCAN:1521

Oracle 9i Upgrade to 10g - Single Database instances to RAC

Hi,
We are considering migrating from single SAP database architecture into
an Oracle 10g RAC architecture. The question i have is:
Are multiple PHYSICAL databases supported in one Oracle 10g RAC environment? For example, Is it possible to install and operate multiple databases in one single ORACLE 10g Real Application Cluster such as one SAP R/3 database, one SAP EBP and one
SAP BW database co-exist in a single Oracle RAC environment?
Regards,
Chengappa Ballachanda

Hi Sairam,
Due to the size of our Production environments we have decided not to pursue the MCOD option.
Eg: Take a QA environment which consists of SRM and BW and we have multiple nodes with both installed on each node. Now if I were to go the MCOD option then these instances can connect to one large Oracle File System using different schema's.
What I'm trying to establish is in that one RAC, is it possible to have the multiple database instances on each node (SRM, BW etc) connect to multiple Oracle File Systems ie SRM connect to its own OFS and BW to its own instead of the one large shared OFS?
Hope this makes sense! Easier if I could upload a diagram!
Regards,
Chengappa

Rac One Node on Rac Servers

Hi Xperts
We have this environment:
2 Rac Nodes 11.2.0.3 Enterprise on Oracle Linux 5.9 .
We have one production Database on this Rac and the users ask to create two single instance on each node, something like this:
Node1 -> Rac Prod1, Single Test
Node2-> Rac Prod2, Single Dev
I want to create Rac One node for those Database (Dev, Test) and create New Diskgroups for ech database.
Can I install a Rac One node on those Server with DBCA?
Do I nedd to Install new Database Software ?
Does the installed Rac have some affectation ?
I just want to be sure about this procedure, before to do anything.
Thank you
J.A.

Hi J.A.
Yes you can! However you need to install Grid Infrastructure (GI) in cluster on both nodes, then install database software. Either during software installation or after that, DBCA would allow you to create 1) Single instance, 2) RAC database, 3) RAC One Node database. Keep in mind that RAC One Node is an option (additional license) to the Enterprise Edition of Oracle Database.
I've talked on that topic at the Bulgarian Oracle Users Group at 2011, here is the link to the presentation, you may find it useful. I might upload the videos as well if you need to have something like a proof of concept of just for your own:
http://sve.to/download/1112/
Also I would go with one disk group for both databases, as long as they share the same physical disks I don't see the point of doing that ? Having one diskgroup would allow you to utilize better you disk/space resources.
The procedure would be:
1. Install GI in cluster.
2. Install software libraries.
3. Patch up to 11.2.0.4.
4. Create RAC One Node database using either command line or using Custom Template of DBCA.
At the end of the day, if you have standard edition license you can still install GI in cluster and create single instance databases on each server. The downside of doing that is that you need to manually failover the database to remaining node in case of disaster.
Regards,
Sve

Oracle RAC ONE Node ! Inquiry

Hi,
Good Day.
In my understanding Oracle 11gr2 RAC ONE Node "online database relocation" ability can address ONLY "Planned downtime Maintenance window".
I mean in case of any catastrophic event i.e "failover / un-planned downtime" a production downtime window is a Must which it need to restart the failed instance on standby node.
Please comment.
Thanks
M Ahmad

Muhammad Ahmad wrote:
Hi Sharma,
I understand.
but i was talking about downtime windows, in my understanding customer will face downtime window during failover to secondary node or restart on same node 'the time needed to restart database instance' but ONLY for planned maintenance activities 'online database instance relocation' capability can be utilized to relocate database instance to another node without facing any downtime as it uses 'shutdown transactional' apporach..
do you agree with my understanding?Yes..
During failure of Instance it will be restarted (downtime occurs). Is not possible use OMOTION on this case
Using Omotion:
Omotion moves a RAC One Node instance from one server to another—without any downtime
• Use Cases
* Load balancing
* Database + OS patching and maintenance
• Oracle supplied tools control migration
* Services are not accepting connections on both nodes at the same time
* Migrated instance shutdown transactional once services moved
* A maximum of 30 minutes allowed for connections to migrate (then shutdown abort)

Trying out RAC one node on Windows

Hi all,
I have the Grid infrastructure software installed on a 64 bit windows server (standalone - not clustered). Was trying to install an 11g RAC enabled database on said server and it won't install as complains it is not a cluster.
Is it possible to install a RAC enabled Database on a One node grid server that is not clustered to another node?
Any help would be much appreciated as trying to get knowledge with GRID and RAC enabled instances.
Edited by: user13735858 on 10-Feb-2011 06:26

Hi,
Thanks I installed "Real Application Clusters without Oracle Clusterware" for single standalone server - and it installed without issues.Have you installed Oracle RAC without Clusterware?
There is some misunderstanding or you did not install Oracle RAC because Oracle Clusterware is a requirement for using Oracle RAC and it is the only clusterware that you need for most platforms on which Oracle RAC operates.
Although Oracle RAC continues to support select third-party clusterware products on specific platforms, you must also install and use Oracle Clusterware.
Oracle grid infrastructure for a standalone server does not support RAC.
GI Standalone Server is intended to use feature Oracle Restart and Automatic Storage Management (ASM).
The Oracle grid infrastructure for a standalone server is the Oracle software that provides system support for an Oracle database including volume management, file system, and automatic restart capabilities. If you plan to use Oracle Restart or Automatic Storage Management, you must install the grid infrastructure before installing your database.
The grid infrastructure for a standalone server is the software that includes Oracle Restart and Automatic Storage Management. Oracle combined the two infrastructure products into a single set of binaries that is installed as the grid infrastructure home. The grid infrastructure should be installed before installing Oracle Database 11g Release 2.
My question is does the server for one node have to be part of a cluster before you can install a RAC instance, even if you intend the instance to remain as one node RAC?1- You must Install and Configure Oracle Clusterware, even if it is only one node.
2 - Install Oracle Software Database (RAC)
3 - Create your RAC Database.
RAC or RAC One Node must be configured on Oracle Clusterware.
Regards,
Levi Pereira
Edited by: Levi Pereira on Feb 11, 2011 1:15 PM

How to install more than one instances on one machine

Hi ALL,
I want to install more than one instances on one machine, but i am a freshman on SAP field. How and where can i get the related infomation for that? thank you very much !!

Hi tieyan,
Glad the information was of some help.
For Windows, there is an older note <a href="http://service.sap.com/sap/support/notes/28392">28392</a> that has some more information. It is important also that the SAP parameter PHYS_MEMSIZE is sized correctly according to note <a href="http://service.sap.com/sap/support/notes/88416">88416</a> (the bottom of the note gives some examples). For example, if there were two central instances and the two Oracle database instances on one host, PHYS_MEMSIZE for both instance profiles (of the central instances) would be 35% of the RAM (1/2 of 70%). In the case of MSSQLSRV 2000, for PHYS_MEMSIZE you would refer to the scenarios of note <a href="http://service.sap.com/sap/support/notes/327494">327494</a>.
If you ever want to thank somebody else for helping in answering a question, the <a href="https://wiki.sdn.sap.com/wiki/display/HOME/RulesofEngagement">Rules of Engagement</a> has a section 'Thank Others by Giving Points' that explains this further.
Regards, Mark

Details regarding Oracle RAC One node.

Hi
I am trying to google regarding the Oracle RAC one node. But I couldnt get an exact details of it. I even tried in Metallink too. Could you guys please provide the link or Notes ID for this Oracle RAC one node which includes what is it ? How to set up this one node RAC etc etc !
Thanks

There are couple of notes ,
http://www.oracle.com/us/products/database/options/rac-one-node/overview/index.html
http://www.oracle.com/technetwork/products/clustering/overview/ds-rac-one-node-11gr2-185089.pdf
http://download.oracle.com/docs/cd/E11882_01/rac.112/e16795/onenode.htm#BABGAJGH
http://download.oracle.com/docs/cd/E11882_01/install.112/e17214/racinstl.htm#CIHGGAAE
http://download.oracle.com/docs/cd/E11882_01/server.112/e17157/architectures.htm#CJAJEAGH
Aman....

Database instance on one node

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