Oracle RAC and ASM for SAP in SLES
Hello,
We are installing our SAP ERP with Oracle RAC 11.2.0.2 on SLES 11 x86_64. According note 527843 (Oracle RAC support in the SAP environment), this is supported for SAP. But as a requirement ASM Cluster File System must be setup.
But when Oracle Grid is installed, ACFS installation returns the following error:
ACFS-9459: ADVM/ACFS is not supported on this OS version: 'sles-release-11.1-1.152'
So Oracle GRID has been installed without ACFS, so we will not be able to use Oracle Clusterware for providing high availability of SAP.
As this is supposed to be a feasible combination (Oracle RAC 11.2.0.2 with ASM on SLES 11 SP1, Netweaver 7.0), I'm wondering if it is a bug, a lack of documentation or something I'm missing.
Kind regards,
Fermí
Read this below Oracle Note:
ACFS not supported on certain platforms [ID 1075058.1]
oracle@node1:~/app/oracle/product/grid/log/node1> tail -1 alertesiha.log
[client(14083)]CRS-10001:ADVM/ACFS is not supported on SUSE
Then these can be ignored, since ACFS/ADVM may not be supported for your platform. As of this writing, Sun, AIX, SuSE 10 are all supported in 11.2.0.2 only. HP-UX, SuSe 11 and RH6.0, as well as Oracle UEK ((2.6.32-100*) are not yet supported in 11.2.0.2. Keep in mind that this does not prevent your Grid Infrastructure stack (Clusterware and ASM) from starting. This is just an informational message for these platforms
Extract from SAP Note:
RAC 11.2.0.2 (x86 & x86_64 only):
Oracle Clusterware 11.2.0.2 + ASM/ACFS 11.2.0.2 (currently only for SLES10, RHEL5, OL 5.x (without UEK))
Thanks
Srikanth M
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Using this command
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Need to understand basics of Oracle RAC and Grid technology, for training
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I see links here and here, so a couple questions:
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I need to understand Oracle RAC and Grid infrastructure, from a manager's / training perspective.
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Pro Oracle Database 11g RAC on Linux
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I just want to ask some ideas on what is the best way to clone our UAT/DEV environment to our PROD environment.
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APPS server - 32bit
DB server (2 node RAC + ASM) - 32bit
(Target)
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DB server (2 node RAC + ASM) - 64bit
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For Option 2, seems a bit complicated to do 32bit - 64 bit cloning on RAC. Appreciated if you can provide doc id for this.
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Regards,
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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
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(Target)
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DB server (2 node RAC + ASM) - 64bitWhat are the source and target database version?
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Cloning Oracle Applications Release 11i with Rapid Clone [ID 230672.1] -- 6. Cloning a RAC System
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Install 64 bit Oracle 10g to the target system
clone/convert database source (9i 32bit) to database targer (10g 64 bit) using RMAN.
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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).
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Hi,
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1) Do I need to have ASM instance running on each node ? ( most likely yes... but want to make sure )
2) can I share oracle_home between ASM instance and database instance ? what is the best choice ?
3) I'm planning to use shared disks for all files, all databases.... what are the pros/cons ?
4) what should be the installation procedure ? Meaning, first create ASM instance on each node, then install cluster software, build RAC databases...... can someone explain..
5) I believe RMAN is the only option for backup since I'm using ASM, correct ?
I'm a newbie to RAC and ASM..
Thanks,user4866039 wrote:
1) Do I need to have ASM instance running on each node ? ( most likely yes... but want to make sure )yes.
2) can I share oracle_home between ASM instance and database instance ? what is the best choice ?in 10g you can, in 11gr2 you cannot. and it might be better to seperate them because it will give you more flexibility with patching.
3) I'm planning to use shared disks for all files, all databases.... what are the pros/cons ?if you share your oracle_home you won't be able to do rolling updates. so i recommend to keep oracle_homes local.
4) what should be the installation procedure ? Meaning, first create ASM instance on each node, then install cluster software, build RAC databases...... can someone explain..follow the install guide for your respective version. for 10g you'd install clusterware first, then asm and database is last.
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Bjoern -
Hi,
I have noticed following 'strange' behaviour of Oracle Restart and ASM.
starting position:
-bash-3.2 $ crsctl status resource -t
NAME TARGET STATE SERVER STATE_DETAILS
Local Resources
ora.DATA.dg
ONLINE ONLINE oracle-restart
ora.LISTENERASM.lsnr
ONLINE ONLINE oracle-restart
ora.asm
ONLINE ONLINE oracle-restart Started
Cluster Resources
ora.cssd
1 ONLINE ONLINE oracle-restart
ora.diskmon
1 ONLINE ONLINE oracle-restartstep 1:
-bash-3.2 $ srvctl stop asm
-bash-3.2 $ srvctl stop diskgroup -g data
-bash-3.2 $ srvctl disable diskgroup -g datastep 2:
via sqlplus start ASM instance
SQL> startup
ASM instance started
Total System Global Area 283930624 bytes
Fixed Size 2212656 bytes
Variable Size 256552144 bytes
ASM Cache 25165824 bytes
ASM diskgroups mounted
ASM diskgroups volume enabled
SQL> select * from v$asm_diskgroup;
GROUP_NUMBER NAME SECTOR_SIZE BLOCK_SIZE
ALLOCATION_UNIT_SIZE STATE TYPE TOTAL_MB FREE_MB HOT_USED_MB
COLD_USED_MB REQUIRED_MIRROR_FREE_MB USABLE_FILE_MB OFFLINE_DISKS
COMPATIBILITY
DATABASE_COMPATIBILITY V
1 DATA 512 4096
1048576 MOUNTED EXTERN 10236 10177 0
59 0 10177 0
GROUP_NUMBER NAME SECTOR_SIZE BLOCK_SIZE
ALLOCATION_UNIT_SIZE STATE TYPE TOTAL_MB FREE_MB HOT_USED_MB
COLD_USED_MB REQUIRED_MIRROR_FREE_MB USABLE_FILE_MB OFFLINE_DISKS
COMPATIBILITY
DATABASE_COMPATIBILITY V
11.2.0.0.0
10.1.0.0.0 N
-bash-3.2 $ crsctl status resource -t
NAME TARGET STATE SERVER STATE_DETAILS
Local Resources
ora.DATA.dg
OFFLINE OFFLINE oracle-restart <== funny !!!
ora.LISTENERASM.lsnr
ONLINE ONLINE oracle-restart
ora.asm
ONLINE ONLINE oracle-restart Started
Cluster Resources
ora.cssd
1 ONLINE ONLINE oracle-restart
ora.diskmon
1 ONLINE ONLINE oracle-restartIs this behaviour a 'feature' or bug?
Anyone had similar experience?
thanks,
goranHi,
asm resource is depending on diskgroup resource ... if diskgroup res. is not available, crsctl status shows offline, I would expect asm should be also shown as 'offline' (and brought offline) as they are dependent.
What is the point of managing resources via srvctl when it doesn't take care of dependencies? For me it's wrong.ora.asm : is ASM Instance
ora.*.dg : is Diskgroup
ora.*.dg is dependent of ora.asm, not to the contrary.
I can have more than one diskgroup and want only one diskgroup disabled, so I need the ASM Instance (ora.asm) online.
Important:
If you shut down the database with SQL*Plus, Oracle Restart does not interpret this as a database failure and does not attempt to restart the database.
Similarly, if you shut down the Oracle ASM instance with SQL*Plus or ASMCMD, Oracle Restart does not attempt to restart it.
An important difference between starting a component with SRVCTL and starting it with SQL*Plus (or another utility) is the following:
When you start a component with SRVCTL, any components on which this component depends are automatically started first, and in the proper order.
When you start a component with SQL*Plus (or another utility), other components in the dependency chain are not automatically started; you must ensure that any components on which this component depends are started.
Oracle Restart also manages the weak dependency between database instances and the Oracle Net listener (the listener): When a database instance is started, Oracle Restart attempts to start the listener. If the listener startup fails, then the database is still started. If the listener later fails, Oracle Restart does not shut down and restart any database instances.
It makes no sense Oracle Restart to shut down all environment (databases) because the listener down.
Regards,
Levi Pereira -
Clone multi-node RAC and ASM to single node
Hi everyone.
I need clone system with 3 application server and 2 oracle database RAC and ASM to single-node. The operating system is RHEL 5.
I see some metalink notes, but we can't found nothing. I find notes with multi-node to single-node, but nothing with RAC to non-RAC.
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Is possible this clone?
Thanks very much.Hi User;
Please follow below and see its helpful:
EBS R12 with RAC and non-RAC
Re: RAC to single instance ebs R12
Re: Clone Oracle Apps 11.5.10.2 RacDB to Non-RAC DB
Re: CLONING R12 RAC to NON RAC CLONING giving error RMAN-05517 temporary file
[b]Migrating the DB-Tier (DB and CM) to Two node non RAC cluster[/b]
Also check:
http://www.oracle.com/technology/pub/articles/chan_sing2rac_install.html
Regard
Helios -
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 -
Can we have oracle database and gateway for SLQServer on same machine
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LSNRCTL for 64-bit Windows: Version 11.2.0.2.0 - Production on 03-DIC-2012 04:46
:15
Copyright (c) 1991, 2010, Oracle. All rights reserved.
Avvio di tnslsnr: attendere...
TNSLSNR for 64-bit Windows: Version 11.2.0.2.0 - Production
Il file dei parametri di sistema Þ C:\app\Administrator\product\11.2.0\dbhome_1\
network\admin\listener.ora
Messaggi di log registrati in C:\app\Administrator\diag\tnslsnr\WIN-77CAQGHJSA2\
listener\alert\log.xml
Ascolto su: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1521))
Connessione a (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost)(PORT=1521
STATO del LISTENER
Alias listener
Versione TNSLSNR for 64-bit Windows: Version 11.2.0.2.0 - Produ
ction
Data di inizio 03-DIC-2012 04:46:20
Tempo di attivitÓ 0 giorni 0 ore 0 min. 5 sec.
Livello trace off
Sicurezza ON: Local OS Authentication
SNMP OFF
File di parametri listenerC:\app\Administrator\product\11.2.0\dbhome_1\network\a
dmin\listener.ora
File di log listener C:\app\Administrator\diag\tnslsnr\WIN-77CAQGHJSA2\list
ener\alert\log.xml
Summary table degli endpoint di ascolto...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1521)))
Summary table dei servizi...
Il servizio "test" ha 1 istanze.
L'istanza "test", stato UNKNOWN, ha 1 handler per questo servizio...
Il comando Þ stato eseguito
C:\Users\Administrator>lsnrctl start listener1
LSNRCTL for 64-bit Windows: Version 11.2.0.2.0 - Production on 03-DIC-2012 04:46
:23
Copyright (c) 1991, 2010, Oracle. All rights reserved.
Avvio di tnslsnr: attendere...
TNSLSNR for 64-bit Windows: Version 11.2.0.2.0 - Production
Il file dei parametri di sistema Þ C:\app\Administrator\product\11.2.0\dbhome_1\
network\admin\listener.ora
Messaggi di log registrati in D:\product\11.2.0\tg_2\diag\tnslsnr\WIN-77CAQGHJSA
2\listener1\alert\log.xml
Ascolto su: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1522))
Connessione a (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost)(PORT=1522
STATO del LISTENER
Alias listener1
Versione TNSLSNR for 64-bit Windows: Version 11.2.0.2.0 - Produ
ction
Data di inizio 03-DIC-2012 04:46:29
Tempo di attivitÓ 0 giorni 0 ore 0 min. 5 sec.
Livello trace off
Sicurezza ON: Local OS Authentication
SNMP OFF
File di parametri listenerC:\app\Administrator\product\11.2.0\dbhome_1\network\a
dmin\listener.ora
File di log listener D:\product\11.2.0\tg_2\diag\tnslsnr\WIN-77CAQGHJSA2\li
stener1\alert\log.xml
Summary table degli endpoint di ascolto...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1522)))
Summary table dei servizi...
Il servizio "dg4msql" ha 1 istanze.
L'istanza "dg4msql", stato UNKNOWN, ha 1 handler per questo servizio...
Il comando Þ stato eseguito
C:\Users\Administrator>sqlplus /nolog
SQL*Plus: Release 11.2.0.2.0 Production on Lun Dic 3 04:46:34 2012
Copyright (c) 1982, 2010, Oracle. All rights reserved.
SQL> conn system/Manager1@star
Connesso.
SQL> create public database link test2 connect to "sa" identified by "pwd"
using 'dg4msql';
Creato database link.
SQL> select count(*) from prefer@test2;
select count(*) from prefer@test2
ERRORE alla riga 1:
ORA-28545: errore diagnosticato da Net8 durante la connessione a un agente
Unable to retrieve text of NETWORK/NCR message 65535
ORA-02063: precedente 2 lines da TEST2
Output of tnsping from oracle_home
C:\Users\Administrator>tnsping dg4msql
TNS Ping Utility for 64-bit Windows: Version 11.2.0.2.0 - Production on 03-DIC-2
012 05:01:28
Copyright (c) 1997, 2010, Oracle. All rights reserved.
File di parametri utilizzati:
C:\app\Administrator\product\11.2.0\dbhome_1\network\admin\sqlnet.ora
╚ stato utilizzato l'adattatore TNSNAMES per risolvere l'alias
Tentativo di contattare (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1522)) (CONNECT_DATA = (SERVICE_NAME = dg4msql)) (HS=OK))
OK (0 msec)
tnsnames.ora file at D:\product\11.2.0\tg_2\NETWORK\ADMIN
dg4msql =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1522))
(CONNECT_DATA = (SERVICE_NAME = dg4msql))
(HS=OK)
C:\app\Administrator\product\11.2.0\dbhome_1\NETWORK\ADMIN
LISTENER_test=
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
dg4msql =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1522))
(CONNECT_DATA = (SERVICE_NAME = dg4msql))
(HS=OK)
test=
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = test)
)
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