Converting from RAC to Single Instance - Memory

hi,
we are moving forward with virtualizing our database environment and want to use 11g RACOne. We currently are using 3 node, 10g RAC. In coming up with specifications I am wondering what general rule there is for sizing the SGA. As an example if one of my databases has 3 500MB SGA's do I simply have a single instance with 1500MB SGA? I'm not sure what the approach would be.
Any info appreciated. Thanks in advance...ron

RonHeeb wrote:
thanks for the response. i have been regularly taking current sizes of each SGA from gv$sgastat to see what's being allocated. my thinking is that this is a minimum and that i should add to it for peak loads, ensuring that it's not set below any minimum that RACOne requires.
beyond that going to RACOne seems to be a direction for virtualized DB servers and for us 24 by 7 is not needed (although more than a few minutes outage would be an issue). in any case if needed we could go RAC on our most critical environments. I'm attracted to how patching/server maintenance can be achieved with RACOne.Okay, you either need high availability or you don't. if having a db go down "for more than a few minutes" is a problem then, don't you really need 24x7 ? And in that case, isn't the high availability offered by RAC is your only option? For me, having a mission critical database (and it looks like this qualifies) on anything "vitualized" is a disaster waiting to happen. I find it lunacy to have, say, 4 virtual failover servers (RACOne) on the same physical hardware. When that server crashes so does your entire failover scenario.
>
Edited by: user10489842 on Sep 13, 2012 2:04 PM

Similar Messages

RMAN backup restore from RAC to single instance ASM

Hi,
We are using oracle 11gR2 on AIX 6.1,
We need to restore RMAN backup from RAC to single instance ASM,
Im new to RAC & ASM, What will be the changes
What will be steps involved into it.
Thanks

Hello,
Refer this MOS doc *HowTo Restore RMAN Disk backups of RAC Database to Single Instance On Another Node [ID 415579.1]*
On the Single Instance ASM, you need to specify the diskgroup name for the parameters "control_files, db_create_file_dest"
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Streams Setup from RAC to Single instance

Does anyone have a document to setup streams from RAC to Non RAC. I successfully setup streams on 2 single instances but I am having issues in replicating, Streams is setup on node1 or Rac and Apply process is also setup on single node. but data is not replicating.
Appreciate any suggestions.

From Metalink Note 418755.1:
Additional Configuration for RAC Environments for a Source Database Archive Logs
The archive log threads from all instances must be available to any instance
running a capture process. This is true for both local and downstream capture.
Queue Ownership
When Streams is configured in a RAC environment, each queue table has an
"owning" instance. All queues within an individual queue table are owned by
the same instance. The Streams components (capture/propagation/apply) all
use that same owning instance to perform their work. This means that
+ a capture process is run at the owning instance of the source queue.
+ a propagation job must run at the owning instance of the queue
+ a propagation job must connect to the owning instance of the target queue.
Ownership of the queue can be configured to remain on a specific instance,
as long as that instance is available, by setting the PRIMARY _INSTANCE
and/or SECONDARY_INSTANCE parameters of DBMS_AQADM.ALTER_QUEUE_TABLE.
If the primary_instance is set to a specific instance (ie, not 0), the queue
ownership will return to the specified instance whenever the instance is up.
Capture will automatically follow the ownership of the queue.If the ownership
changes while capture is running, capture will stop on the current instance
and restart at the new owner instance.
For queues created with Oracle Database 10g Release 2, a service will be
created with the service name= schema.queue and the network name
SYS$schema.queue.global_name for that queue. If the global_name of the
database does not match the db_name.db_domain name of the database, be sure
to include the global_name as a service name in the init.ora.
For propagations created with the Oracle Database 10g Release 2 code with
the queue_to_queue parameter to TRUE, the propagation job will deliver only
to the specific queue identified. Also, the source dblink for the target
database connect descriptor must specify the correct service (global name of
the target database ) to connect to the target database. For example, the
tnsnames.ora entry for the target database should include the CONNECT_DATA
clause in the connect descriptor for the target database. This claus should
specify (CONNECT_DATA=(SERVICE_NAME='global_name of target database')).
Do NOT include a specific INSTANCE in the CONNECT_DATA clause.
For example, consider the tnsnames.ora file for a database with the global name
db.mycompany.com. Assume that the alias name for the first instance is db1 and
that the alias for the second instance is db2. The tnsnames.ora file for this
database might include the following entries:
db.mycompany.com=
(description=
(load_balance=on)
(address=(protocol=tcp)(host=node1-vip)(port=1521))
(address=(protocol=tcp)(host=node2-vip)(port=1521))
(connect_data=
(service_name=db.mycompany.com)))
db1.mycompany.com=
(description=
(address=(protocol=tcp)(host=node1-vip)(port=1521))
(connect_data=
(service_name=db.mycompany.com)
(instance_name=db1)))
db2.mycompany.com=
(description=
(address=(protocol=tcp)(host=node2-vip)(port=1521))
(connect_data=
(service_name=db.mycompany.com)
(instance_name=db2)))
Use the italicized tnsnames.ora alias in the target database link USING clause.
DBA_SERVICES lists all services for the database. GV$ACTIVE_SERVICES identifies
all active services for the database In non_RAC configurations, the service
name will typically be the global_name. However, it is possible for users to
manually create alternative services and use them in the TNS connect_data
specification . For RAC configurations, the service will appear in these views
as SYS$schema.queue.global_name.
Propagation Restart
Use the procedures START_PROPAGATION and STOP_PROPAGATION from
DBMS_PROPAGATION_ADM to enable and disable the propagation schedule.
These procedures automatically handle queue_to_queue propagation.
Example:
exec DBMS_PROPAGATION_ADM.stop_propagation('name_of_propagation'); or
exec DBMS_PROPAGATION_ADM.stop_propagation('name_of_propagation',force=>true);
exec DBMS_PROPAGATION_ADM.start_propagation('name_of_propagation');
If you use the lower level DBMS_AQADM procedures to manage the propagation schedule,
be sure to explicitly specify the destination_queue name when queue_to_queue propagation has been configured.
Example:
DBMS_AQADM.UNSCHEDULE_PROPAGATION('source_queue_name','destination',destination_queue=>'specific_queue');
DBMS_AQADM.SCHEDULE_PROPAGATION('source_queue_name','destination',destination_queue=>'specific_queue');, DBMS_AQADM.ENABLE_PROPAGATION_SCHEDULE('source_queue_name','destination',destination_queue=>'specific_queue');,
DBMS_AQADM.DISABLE_PROPAGATION_SCHEDULE('source_queue_name','destination',destination_queue=>'specific_queue');, DBMS_AQADM.ALTER_PROPAGATION_SCHEDULE('source_queue_name','destination',destination_queue=>'specific_queue');
Changing the GLOBAL_NAME of the Source Database
See the OPERATION section on Global_name below. The following are some
additional considerations when running in a RAC environment.
If the GLOBAL_NAME of the database is changed, ensure that any propagations
are dropped and recreated with the queue_to_queue parameter set to TRUE.
In addition, if the GLOBAL_NAME does not match the db_name.db_domain of the
database, include the global_name for the queue (NETWORK_NAME in DBA_QUEUES)
in the list of services for the database in the database parameter
initialization file.
Section 4. Target Site Configuration
The following recommendations apply to target databases, ie, databases in which
Streams apply is configured.
1. Privileges
Grant Explicit Privileges to APPLY_USER for the user tables
Examples:
Privileges for table level DML: INSERT/UPDATE/DELETE,
Privileges for table level DDL: CREATE (ANY) TABLE , CREATE (ANY) INDEX,
CREATE (ANY) PROCEDURE
2. Instantiation
Set Instantiation SCNs manually if not using export/import. If manually
configuring the instantiation scn for each table within the schema, use the
RECURSIVE=>TRUE option on the DBMS_STREAMS_ADM.SET_SCHEMA_INSTANTIATION_SCN
procedure
For DDL Set Instantiation SCN at next higher level(ie,SCHEMA or GLOBAL level).
3. Conflict Resolution
If updates will be performed in multiple databases for the same shared
object, be sure to configure conflict resolution. See the Streams
Replication Administrator's Guide Chapter 3 Streams Conflict Resolution,
for more detail.
To simplify conflict resolution on tables with LOB columns, create an error
handler to handle errors for the table. When registering the handler using
the DBMS_APPLY_ADM.SET_DML_HANDLER procedure, be sure to specify the
ASSEMBLE_LOBS parameter as TRUE.
In Streams Concepts manual 10.2 chapter 22: Monitoring Apply
Displaying detailed information about Apply errors.
4. Apply Process Configuration
A. Rules
If the maintain_* procedures are not suitable for your environment,
please use the ADD_RULES procedures (ADDTABLE_RULES , ADD_SCHEMA_RULES ,
ADD_GLOBAL_RULES (for DML and DDL), ADD_SUBSET_RULES (DML only).
These procedures minimize the number of steps required to configure Streams
processes. Also, it is possible to create rules for non-existent objects,
so be sure to check the spelling of each object specified in a rule carefully.
APPLY can be configured with or without a ruleset. The ADD_GLOBAL_RULES can
be used to apply all changes in the queue for the database. If no ruleset is
specified for the apply process, all changes in the queue are processed by the apply process.
A single Streams apply can process rules for multiple tables or schemas
located in a single queue that are received from a single source database .
For best performance, rules should be simple. Rules that include LIKE clauses are
not simple and will impact the performance of Streams.
To eliminate changes for particular tables or objects, specify the
include_tagged_lcr clause along with the table or object name in the
negative rule set for the Streams process. Setting this clause will
eliminate all changes, tagged or not, for the table or object.
B. Parameters
Set the following parameters after a apply process is created:
+ DISABLE_ON_ERROR=N Default: Y
If Y, then the apply process is disabled on the first unresolved error,
even if the error is not fatal.
If N, then the apply process continues regardless of unresolved errors.
+ PARALLELISM=3* Number of CPU Default: 1
Apply parameters can be set using the SET_PARAMETER procedure from the
DBMS_APPLY_ADM package. For example, to set the DISABLE_ON_ERROR parameter
of the streams apply process named APPLY_EX, use the following syntax while
logged in as the Streams Administrator:
exec dbms_apply_adm.set_parameter('apply_ex','disable_on_error','n');
Change the apply parallelism parameter recommendation to a lower number.
In general, try 4 or 8 and increase or decrease as necessary for your workload.
In some cases, performance can be improved by setting the following hidden
parameter. This parameter should be set when the major workload is UPDATEs
and the updates are performed on just a few columns of a many-column table.
+ DYNAMICSTMTS=Y Default: N
If Y, then for UPDATE statements, the apply process will optimize the
generation of SQL statements based on required columns.
CHECKPOINTFREQUENCY=1000
Increase the frequency of logminer checkpoints especially in a
database with significant LOB or DDL activity.
exec dbms_capture_adm.set_parameter('capture_ex','_checkpoint_frequency','1000');
5. Additional Configuration for RAC Environments for a Apply Database
Queue Ownership
When Streams is configured in a RAC environment, each queue table has an
"owning" instance. All queues within an individual queue table are owned
by the same instance. The Streams components (capture/propagation/apply)
all use that same owning instance to perform their work. This means that
the database link specified in the propagation must connect to the owning
instance of the target queue. the apply process is run at the owning instance
of the target queue
Ownership of the queue can be configured to remain on a specific instance,
as long as that instance is available, by setting the PRIMARY _INSTANCE and
SECONDARY_INSTANCE parameters of DBMS_AQADM.ALTER_QUEUE_TABLE. If the
primary_instance is set to a specific instance (ie, not 0), the queue
ownership will return to the specified instance whenever the instance is up.
Apply will automatically follow the ownership of the queue. If the ownership
changes while apply is running, apply will stop on the current instance and
restart at the new owner instance.
Changing the GLOBAL_NAME of the Database
See the OPERATION section on Global_name below. The following are some
additional considerations when running in a RAC environment.
If the GLOBAL_NAME of the database is changed, ensure that the queue is
empty before changing the name and that the apply process is dropped and
recreated with the apply_captured parameter = TRUE. In addition, if the
GLOBAL_NAME does not match the db_name.db_domain of the database, include
the GLOBAL_NAME in the list of services for the database in the database
parameter initialization file.

Failover from RAC to Single Instance db

Hi
i know that i can have a single instance db , as the failover option in my dataguard system
do i need to change some parameters while i am failing over from Rac DB to Single Instance DB
something like cluster_db = false
Thanks

RonHeeb wrote:
thanks for the response. i have been regularly taking current sizes of each SGA from gv$sgastat to see what's being allocated. my thinking is that this is a minimum and that i should add to it for peak loads, ensuring that it's not set below any minimum that RACOne requires.
beyond that going to RACOne seems to be a direction for virtualized DB servers and for us 24 by 7 is not needed (although more than a few minutes outage would be an issue). in any case if needed we could go RAC on our most critical environments. I'm attracted to how patching/server maintenance can be achieved with RACOne.Okay, you either need high availability or you don't. if having a db go down "for more than a few minutes" is a problem then, don't you really need 24x7 ? And in that case, isn't the high availability offered by RAC is your only option? For me, having a mission critical database (and it looks like this qualifies) on anything "vitualized" is a disaster waiting to happen. I find it lunacy to have, say, 4 virtual failover servers (RACOne) on the same physical hardware. When that server crashes so does your entire failover scenario.
>
Edited by: user10489842 on Sep 13, 2012 2:04 PM

Moving from Oracle RAC to single instance

Hi,
We are running EBS R12 on windows 2008 R2. Its a 2 node setup, we want to move it to single instance.
I heard that moving from RAC to single instance is not supported by oracle is it true?
Can someone kindly guide me documentation for the same.

user10243788 wrote:
Hi,
We are running EBS R12 on windows 2008 R2. Its a 2 node setup, we want to move it to single instance.
I heard that moving from RAC to single instance is not supported by oracle is it true?
Can someone kindly guide me documentation for the same.Its totally possible technically to move from RAC to single node and its even documented. I dont know where you have heard that its not supported.
See the process of removing node from rac
http://docs.oracle.com/cd/B28359_01/rac.111/b28254/adddelunix.htm
http://docs.oracle.com/cd/B19306_01/rac.102/b14197/adddelunix.htm
http://www.idevelopment.info/data/Oracle/DBA_tips/Oracle10gRAC/CLUSTER_23.shtml
For performance related
Moving RAC to single instance

Db context file creation for rac to single instance cloning

DOC ID: 559518.1 Section 6: RAC to Single Instance Cloning mentions that the context file creation should be done as in the case of Single Instance cloning
what would be the command syntax?

Thanks Hussein. However, section 6 of doc 559518.1 mentions that part 5.1.3 when cloning from rac to single node should be done as in the case of Single Instance cloning.
the syntax for rac to rac cloning (which is in 5.1.3) is
perl adclonectx.pl \
contextfile=[PATH to OLD Source RAC contextfile.xml] \
template=[NEW ORACLE_HOME]/appsutil/template/adxdbctx.tmp \
pairsfile=[NEW ORACLE_HOME]/appsutil/clone/pairsfile.txt \
initialnode
so what is the syntax for rac to single instance? I reckon I will still use adclonectx.pl, but now what would be the complete sysntax for single instance cloning?

Benefit of RAC over single instance

Dear,
There would be up-gradation of our main system from oracle 10.2.0.4 to 11.2.0.4. The management wants to stay on single instance as it is now. But Oracle RAC is something that is must for all the critical system I need to present the benefit of RAC over single instance considering the high cost. Can you show me the benefits of RAC that ppl would go for it instead of single instance????

Hi,
The Benefits of Oracle Real Application Clusters.
High Availability-Oracle Real Application Clusters 11g provides the foundation for data centre-high availability. It is also
an integral component of Oracle’s Maximum Availability Architecture, which provides best practices to
provide the highest availability for your data center. Oracle Real Application provides the following ke
characteristics essential for a high available data management
Reliability – The Oracle Database is known for its reliability. Oracle Real Application Clusters takes this
a step further by removing the database server as a single point of failure. If an instance fails, the
remaining instances in the server pool remain open and active. Oracle Clusterware monitors all Oracle
processes and immediately restarts any failed component.
Recoverability – The Oracle Database includes many features that make it easy to recover from all
types of failures. If an instance fails in an Oracle RAC database, it is recognized by another instance in
the server pool and recovery will start automatically. Fast Application Notification (FAN) and Fast
Connection Failover (FCF) or Transparent Application Failover (TAF) make it easy for applications to
mask component failures from the user.
Error Detection – Oracle Clusterware automatically monitors Oracle RAC databases as well as other
Oracle processes (ASM, listener, etc) and provides fast detection of problems in the environment. It also
automatically recovers from failures often before users noticed that a failure has occurred. Fast
Application Notification (FAN) provides the ability for applications to receive immediate notification of
cluster component failures in order to re-issue the transaction before the failure surfaces.
Continuous Operations – Oracle Real Application Clusters provides continuous service for both
planned and unplanned outages. If a server (or an instance) fails, the database remains open and the
application is able to access data. Most database maintenance operations can be completed without
downtime and are transparent to the user. Many other maintenance tasks can be done in a rolling
fashion so application downtime is minimized or removed. Fast Application Notification and Fast
Connection Failover assist applications in meeting service levels.
Scalability-Oracle Real Application Clusters provides a unique technology for scaling applications. Traditionally,
when database servers ran out of capacity, they were replaced with new and larger servers. As servers
grow in capacity, they are more expensive. For databases using Oracle RAC, there are alternatives for
increasing the capacity. Applications that have traditionally run on large SMP servers can be migrated to
run on pools of small servers. Alternatively, you can maintain the investment in the current hardware and
add a new servers to the pool (or to create a server pool) to increase the capacity. Adding servers to a
server pool with Oracle Clusterware and Oracle RAC does not require an outage and as soon as the new
instances are started, the application can take advantage of the extra capacity. All servers in the server pool
must run the same operating system and the same version of Oracle, but they do not have to be of exactly
the same capacity. Customers today run server pools that fit their needs often using servers of (slightly)
different characteristics.
http://www.oracle.com/technetwork/database/clustering/overview/twp-rac11gr2-134105.pdf

Dataguard configuration from 2-node rac to single instance with out ASM

Hi Gurus,
Oracle Version : 11.2.0.1
Operating system:linux.
Here i am trying to configure data Guard from 2-node rac to a singled instance stanby database . I have done all the changes in the parameter file for both primary and stand by database and when i am trying to duplicate my target database it is giving error as shown below.
[oracle@rac1 dbs]$ rman target / auxiliary sys/qfundracdba@poorna
Recovery Manager: Release 11.2.0.1.0 - Production on Thu Jul 21 14:49:01 2011
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
connected to target database: QFUNDRAC (DBID=3138886598)
connected to auxiliary database: QFUNDRAC (not mounted)
RMAN> duplicate target database for standby from active database;
Starting Duplicate Db at 21-JUL-11
using target database control file instead of recovery catalog
allocated channel: ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: SID=63 device type=DISK
contents of Memory Script:
   backup as copy reuse
   targetfile '/u01/app/oracle/product/11.2.0/db_1/dbs/orapwqfundrac1' auxiliary format
'/u01/app/oracle/product/11.2.0/db_1//dbs/orapwpoorna'   ;
executing Memory Script
Starting backup at 21-JUL-11
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=10 instance=qfundrac1 device type=DISK
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of Duplicate Db command at 07/21/2011 14:49:29
RMAN-03015: error occurred in stored script Memory Script
RMAN-03009: failure of backup command on ORA_DISK_1 channel at 07/21/2011 14:49:29
ORA-17629: Cannot connect to the remote database server
ORA-17627: ORA-01017: invalid username/password; logon denied
ORA-17629: Cannot connect to the remote database serverHere i was able to connect to my auxiliary database as shown below
[oracle@rac1 dbs]$ rman target /
Recovery Manager: Release 11.2.0.1.0 - Production on Thu Jul 21 15:00:10 2011
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
connected to target database: QFUNDRAC (DBID=3138886598)
RMAN> connect auxiliary sys/qfundracdba@poorna
connected to auxiliary database: QFUNDRAC (not mounted)Can any one please help me .
Thanks & Regards
Poorna Prasad.S

Hi All,
Can any one please find out my both the parameters file and tell me if any thing is wrong.
Primary Database parameters.
qfundrac1.__db_cache_size=2818572288
qfundrac2.__db_cache_size=3372220416
qfundrac1.__java_pool_size=16777216
qfundrac2.__java_pool_size=16777216
qfundrac1.__large_pool_size=16777216
qfundrac2.__large_pool_size=16777216
qfundrac1.__oracle_base='/u01/app/oracle'#ORACLE_BASE set from environment
qfundrac2.__oracle_base='/u01/app/oracle'#ORACLE_BASE set from environment
qfundrac1.__pga_aggregate_target=4294967296
qfundrac2.__pga_aggregate_target=4294967296
qfundrac1.__sga_target=4294967296
qfundrac2.__sga_target=4294967296
qfundrac1.__shared_io_pool_size=0
qfundrac2.__shared_io_pool_size=0
qfundrac1.__shared_pool_size=1375731712
qfundrac2.__shared_pool_size=855638016
qfundrac1.__streams_pool_size=33554432
qfundrac2.__streams_pool_size=0
*.audit_file_dest='/u01/app/oracle/admin/qfundrac/adump'
*.audit_trail='db'
*.cluster_database=true
*.compatible='11.2.0.0.0'
*.control_files='+ASM_DATA2/qfundrac/controlfile/current.256.754410759'
*.db_block_size=8192
*.db_create_file_dest='+ASM_DATA1'
*.db_create_online_log_dest_1='+ASM_DATA2'
*.db_domain=''
*.DB_FILE_NAME_CONVERT='/u02/poorna/oradata/','+ASM_DATA1/','/u02/poorna/oradata','+ASM_DATA2/'
*.db_name='qfundrac'
*.db_recovery_file_dest_size=40770732032
*.DB_UNIQUE_NAME='qfundrac'
*.diagnostic_dest='/u01/app/oracle'
*.dispatchers='(PROTOCOL=TCP) (SERVICE=qfundracXDB)'
*.fal_client='QFUNDRAC'
*.FAL_SERVER='poorna'
qfundrac2.instance_number=2
qfundrac1.instance_number=1
*.LOG_ARCHIVE_CONFIG='DG_CONFIG=(qfundrac,poorna)'
*.LOG_ARCHIVE_DEST_1='LOCATION=+ASM_FRA VALID_FOR=(ALL_LOGFILES,ALL_ROLES) DB_UNIQUE_NAME=qfundrac'
*.LOG_ARCHIVE_DEST_2='SERVICE=boston ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=poorna'
*.LOG_ARCHIVE_DEST_STATE_1='ENABLE'
*.LOG_ARCHIVE_DEST_STATE_2='ENABLE'
*.LOG_ARCHIVE_FORMAT='%t_%s_%r.arc'
*.LOG_ARCHIVE_MAX_PROCESSES=30
*.LOG_FILE_NAME_CONVERT='/u02/poorna/oradata/','+ASM_DATA1/','/u02/poorna/oradata','+ASM_DATA2/'
*.open_cursors=300
*.pga_aggregate_target=4294967296
*.processes=300
*.remote_listener='racdb-scan.qfund.net:1521'
*.REMOTE_LOGIN_PASSWORDFILE='EXCLUSIVE'
*.sec_case_sensitive_logon=FALSE
*.sessions=335
*.sga_target=4294967296
*.STANDBY_FILE_MANAGEMENT='AUTO'
qfundrac2.thread=2
qfundrac1.thread=1
qfundrac1.undo_tablespace='UNDOTBS1'
qfundrac2.undo_tablespace='UNDOTBS2'and my standby database prameter file.
poorna.__db_cache_size=314572800
poorna.__java_pool_size=4194304
poorna.__large_pool_size=4194304
poorna.__oracle_base='/u01/app/oracle'#ORACLE_BASE set from environment
poorna.__pga_aggregate_target=343932928
poorna.__sga_target=507510784
poorna.__shared_io_pool_size=0
poorna.__shared_pool_size=176160768
poorna.__streams_pool_size=0
*.audit_file_dest='/u01/app/oracle/admin/poorna/adump'
*.audit_trail='db'
*.compatible='11.2.0.0.0'
*.control_files='/u01/app/oracle/oradata/poorna/control01.ctl','/u01/app/oracle/flash_recovery_area/poorna/control02.ctl'
*.db_block_size=8192
*.db_domain=''
#*.db_name='poorna'
#*.db_recovery_file_dest='/u01/app/oracle/flash_recovery_area'
*.db_recovery_file_dest_size=4039114752
*.diagnostic_dest='/u01/app/oracle'
*.dispatchers='(PROTOCOL=TCP) (SERVICE=poornaXDB)'
*.local_listener='LISTENER_POORNA'
*.memory_target=849346560
*.open_cursors=300
*.processes=150
*.remote_login_passwordfile='EXCLUSIVE'
*.sec_case_sensitive_logon=FALSE
*.undo_tablespace='UNDOTBS1'
############### STAND By PARAMETERS ########
DB_NAME=qfundrac
DB_UNIQUE_NAME=poorna
LOG_ARCHIVE_CONFIG='DG_CONFIG=(poorna,qfundrac)'
#CONTROL_FILES='/arch1/boston/control1.ctl', '/arch2/boston/control2.ctl'
DB_FILE_NAME_CONVERT='+ASM_DATA1/','/u02/poorna/oradata/','+ASM_DATA2/','/u02/poorna/oradata'
LOG_FILE_NAME_CONVERT= '+ASM_DATA1/','/u02/poorna/oradata/','+ASM_DATA2/','/u02/poorna/oradata'
LOG_ARCHIVE_FORMAT=log%t_%s_%r.arc
LOG_ARCHIVE_DEST_1= 'LOCATION=/u02/ARCHIVE/poorna VALID_FOR=(ALL_LOGFILES,ALL_ROLES) DB_UNIQUE_NAME=poorna'
LOG_ARCHIVE_DEST_2= 'SERVICE=qfundrac ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=qfundrac'
LOG_ARCHIVE_DEST_STATE_1=ENABLE
LOG_ARCHIVE_DEST_STATE_2=ENABLE
REMOTE_LOGIN_PASSWORDFILE=EXCLUSIVE
STANDBY_FILE_MANAGEMENT=AUTO
FAL_SERVER=qfundrac
FAL_CLIENT=poornaThanks & Regards,
Poorna Prasad.S

Datagurad setup from 2 Node RAC to single instance (DR site)

Dear Expert,
I have request from management to setup the DR site from current production RAC database using active dataguard. I have two node rac database 11.2.0.3 running on sun solaris machine. I need proper step or good document can refer to setup between production RAC database to DR site single instance standby database. I only experience setup single instance to single instance .Apreciate expert can provide me some link
Regard
liang

Hello;
This will provide a good start and overview :
Creating a Single Instance Physical Standby for a RAC Primary : ( please note parameter changes for Oracle 11 )
http://www.oracle.com/technetwork/database/features/availability/maa-wp-10g-racprimarysingleinstance-131970.pdf
As will this :
http://oracleinstance.blogspot.com/2012/01/create-single-instance-standby-database.html
Oracle 11
Rapid Oracle RAC Standby Deployment: Oracle Database 11g Release 2
http://www.oracle.com/technetwork/database/features/availability/maa-wp-11g-rac-standby-133152.pdf
Best Regards
mseberg

Data guard performance problem (rac to single instance)

i have a table it has GPS data, and gps table has too many data, 5 millions,
iam using RAC (2 nodes 11gr2). standby database is single instance data guard,
single instance database (standby)'s hardware cpu is lower than RAC machines. rac nodes have (15k) disks, standby has (7200rpm),
so i dont want to use GPS tables on data guard system, i dont want to run GPS table's DML commands (delete, insert), i think it may increase performance,
is it posible? what is your advise?
any feedback makes me happy,
best regards

it's not possible with data guard, but you can use streams or golgengate for this purpose. Have a look at dataguard performance tuning guide. Maybe there is something you can fix on the configuration to be faster.
[Data Guard Redo Apply and Media Recovery Best Practices|http://www.oracle.com/technetwork/database/features/availability/maa-wp-10grecoverybestpractices-129577.pdf]
[Redo Transport and Network Best Practices|http://www.oracle.com/technetwork/database/features/availability/maa-wp-11gr1-activedataguard-1-128199.pdf]
I don't know an 11g version for these docs but they would still help.

Best way to move from RAC to single node database.

Hi,
One of my customer is having RAC setup with EBS R12. Due to some other issues, customer is looking to switch back to Standalone database. What could be the best approach for this?
I am thinking to perform the following approach. Could any body comment on the same?
1) create a new oracle_home on the same server.
2) Modify the cluster_database to false.
3) start the database from new oracle_home.
4) Create a new listener with same port#(off course i will stop all RAC services including listener).
Version details are :- 11gR2 on Solaris.
EBS is :- R12.
Is this approach sounds good or any better method.
Thanks in-advance.
Regards
DBA.

Hello DBA,
You can follow these steps...
a) Stop database using srvctl
srvctl stop database -d mydb
b) Remove the database entry from crs
$ srvctl remove instance -d mydb -i mydb1
$ srvctl remove instance -d mydb -i mydb2
$ srvctl remove database -d mydb
c) Start the database on first instance
SQL> startup
SQL> alter system set cluster_database=false scope=spfile;
System altered.
SQL> alter system set cluster_database_instances=1 scope=spfile;
System altered.
SQL> alter database disable thread 2;
Database altered.
d) Delete the unwanted thread and redo logfiles
e) Drop the unwanted undo tablespace
f) Create pfile from spfile
g) Remove second instance references from the pfile and start the instance
h) create spfile from pfile.
Regards,
Alex Alvarenga
SP - Brasil

RMAN + restore rac on single instance...

Hi all,
Can I restore a backup or RAC Database on a single instance?
For example: DB1 is a RAC Database 10.2
I have a RMAN backup of DB1 on host A, copy all files to host B on same directory structure.
Can I restore this backup ??
If someone have any documentation or link, i apreciate too much.
Thanks

Yes, you can. Follow the scenario 'restore the database to a different host'. Be aware you'll need BOTH archive threads!!!
Sybrand Bakker
Senior Oracle DBA

Creating DR standby from RAC to single NODE

OS and Database versions Primary:
node1:- OEL 5.7
node2:- OEL 5.7
inst1:- prod1 Oracle 11.2.0.3
inst2:- prod2 Oracle 11.2.0.3
Standby:
OEL 5.7
Oracle 11.2.0.3
NOTE:- Creating Standby on Single node.
My scenario:
============
node1:- linuxdb1
node2:- linuxdb2
inst1:- prod1
inst2:- prod2
Point1:- We have 2 node RAC with ASM disk and database is okay. Now i want to make DR on single node with ASM disk created already.
Point2:- grid and oracle users are on RAC prod database & also same grid and oracle users on SINGLE node DR
Point3:- Took RMAN backup from prod database ( 2 node RAC ) and copied to DR as shown below:
RMAN>backup device type disk format '/u02/stby/%U' database plus archivelog;
RMAN>backup device type disk format '/u02/stby/%U' current controlfile for standby;
scp -rp /u02/stby/* [email protected]:/u02/stby/
Point4:- Now when i run below command on DR ( oracle@linuxdr2 )
[oracle@linuxdr2 stby]$ rman target sys/pwd@prod1 auxiliary /
Recovery Manager: Release 11.2.0.3.0 - Production on Sun Mar 10 13:18:20 2013
Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.
connected to target database: PROD (DBID=220323208)
connected to auxiliary database: PROD (not mounted)
RMAN> duplicate target database for standby;
Starting Duplicate Db at 10-MAR-13
using target database control file instead of recovery catalog
configuration for DISK channel 2 is ignored
allocated channel: ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: SID=1142 device type=DISK
contents of Memory Script:
restore clone standby controlfile;
executing Memory Script
Starting restore at 10-MAR-13
using channel ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: starting datafile backup set restore
channel ORA_AUX_DISK_1: restoring control file
channel ORA_AUX_DISK_1: reading from backup piece /u02/stby/33o464m6_1_1
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of Duplicate Db command at 03/10/2013 13:19:22
RMAN-05501: aborting duplication of target database
RMAN-03015: error occurred
Can you please help me to resolve the issue.
Thanks,
Vikhar

RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of Duplicate Db command at 03/10/2013 13:19:22
RMAN-05501: aborting duplication of target database
RMAN-03015: error occurred Any errors in alert log file?
Have you tried once again ?
Why cant you go for RMAN duplicate from active database, If you have any concerns then enable trace of RMAN and share the information
rman target / log=/u01/test/rman_log.txt trace=/u01/test/rmantrace.log

How to convert from Grayscale to single color channel

I hope that someone here might be able to help. I am writing an application which loads in color channels separately, to be merged by the application The images are multi-page TIFF files. The trouble that I am running into is that the application loads the images into grayscale, so when I merge the channels, they are merged as grayscale, not as the correct colors.
I use the following on each color channel to load them in:
public static BufferedImage[] loadTiff(File multiPageFile, int colour) {
    BufferedImage[] img = null;
    ArrayList<BufferedImage> tmp = new ArrayList<BufferedImage>();
    try {
        SeekableStream stream = new FileSeekableStream(multiPageFile);
        String[] names = ImageCodec.getDecoderNames(stream);
        ImageDecoder dec = ImageCodec.createImageDecoder(names[0], stream, null);
        int numPages = dec.getNumPages();
        for (int i=0; i<numPages; i++) {
         try {
                RenderedImage im = dec.decodeAsRenderedImage(i);
                BufferedImage bi = PlanarImage.wrapRenderedImage(im).getAsBufferedImage();
          //In case not all pages are valid images, we use ArrayList as it is dynamic
          tmp.add(bi);
            }catch (RuntimeException re) {
          //Once the exception is caught, we can decode the layer here for whatever means.
    }catch (FileNotFoundException fnfe) {
        System.err.println("File not found.");
        fnfe.printStackTrace();
    }catch (Exception e) {
        System.err.println("General Exception caught");
        e.printStackTrace();
    //Convert to an array to be returned.
    img = new BufferedImage[tmp.size()];
    for (int i=0; i<img.length; i++) {
        img[i] = tmp.get(i);
    return img;
}So a BufferedImage array is returned (one element in the array for each page in the multi-page file). Before I return the BufferedImage array, though, it would be good to convert it to the correct color. I know which channel is currently being loaded. Does anyone have any tips on how to shift from a grayscale intensity to a single color intensity? I have tried a number of things regarding byte shifting, but I am really none the wiser.
I have tried, for example, reading the int color value:
int color = bi.getRGB(w,h);The trouble is that this number is not in the region 0..255, so I don't know how I can use it. If I shift the number:
color = color>>16I get a number smaller than 255 (although it seems to be negative), but I don't know whether I can use this value for a single color channel, i.e. if the current color is red, saying:
Color redC = new Color(color, 0, 0);
bi.setRGB(w,h,redC); //Slow and inefficient. There must be a better way.When I try doing that, I end up with nothing drawn or visible.
Does anyone have any ideas? Thanks in advance.
Edited by: doughnuts64 on Jun 12, 2008 6:27 AM

Thanks for the response. It has been helpful in getting my problem sorted. I was not creating a new BufferedImage - I was just using the one that had been loaded in, and as such had not realised that the type was not TYPE_INT_RGB. As soon as I instantiated a new BufferedImage of the same dimensions and colour TYPE_INT_RGB as you suggested, it worked! So thanks for that.
Whilst that does work, it does slow the application incredibly as it has so much data to cycle through. Ideally, I would be able to load the image in directly as the colour channel in question, rather than loading in as grayscale. This way, the application would only require the amount of time needed to load in the images, not to process them on a pixel-by-pixel basis (typical images are made up of over 16,000,000 pixels for each colour channel, and we typically load two files in at once - both for separate colour channels, so over 32,000,000 pixels to process).
As I am loading in multi-page tiff files, I am having to use the JAI (Java Advanced Imaging) toolkit. I use the following code to load in my multi-page tiff into a BufferedImage array, where each element of the array represents one of the 'pages' in the multi-page tiff file:
SeekableStream stream = new FileSeekableStream(multiPageFile);
String[] names = ImageCodec.getDecoderNames(stream);
ImageDecoder dec = ImageCodec.createImageDecoder(names[0], stream, null);
int numPages = dec.getNumPages();
BufferedImage[] finalImage = new BufferedImage[numPages];
for (int i=0; i<numPages; i++) {
     RenderedImage im = dec.decodeAsRenderedImage(i);
     finalImage[i] = PlanarImage.wrapRenderedImage(im).getAsBufferedImage();
     //...colour changing code currently here - loops through finalImage array, and on every pixel of every layer
...To be able to automatically convert the colour channel without having to loop on every pixel (and thus save an incredible amount of loading time) would be helpful.
Thanks.

RAC to Single node cloing

Hi all,
We have our production running on 2 node RAC and its in ASM cluster and AppsTier on single node
Node 1 - AppsTier
Node 2 - RAC 1
Node 3 - RAC 2
Now I would like to do a cloning for the production from RAC to Single Instance
Is there any doc or steps to be followed for the RAC to single instance cloning ??..
Regards,
Mahesh

Hi Makesh;
This topic discussed here many times, Just check below links which u can find all notes and also see general search link
CLONE-RAc to nonrac
RAC -> NON RAC ebiz clone
Re: Clone Oracle Apps 11.5.10.2 RacDB to Non-RAC DB
General search:
http://forums.oracle.com/forums/search.jspa?threadID=&q=rac+to+nonrac+clone&objID=c3&dateRange=all&userID=&numResults=15&rankBy=10001
Regard
Helios

Converting from RAC to Single Instance - Memory

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