How many disk for redundancy on Grid Infrastructure 11gR2 Installation?

I would like too know, How many least disk for normal and high redundancy ?
and please explain to me about structure of normal redundancy & high redundancy.
Edited by: user13049841 on Mar 15, 2011 2:37 AM
Edited by: user13049841 on Mar 15, 2011 2:37 AM

Redundancy Level      Minimum Number of Disks
External           1
Normal                2
High                3
If you only have a disk, means you will not be able to implement normal/high redundancy. In external redundancy ASM presumes the data duplication is taken care at a storage level (e.g. mirrored SAN etc.).
structure of normal redundancy & high redundancyRedundancy is actually a data duplication, so let say if a disk in a Disk Group1 fails, and there is a fail over Disk Group B, so ASM will continue operation.
Must read note for you..
http://download.oracle.com/docs/cd/B28359_01/server.111/b28301/asm002.htm#ADMQS12079
Extractions from the link..
Failure groups are used to determine which ASM disks to use for storing redundant copies of data. example, if 2-way mirroring is specified for a file, ASM automatically stores redundant copies of file extents in separate failure groups.

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How do I define 2 disk groups for ocr and voting disks at the oracle grid infrastructure installation window

Hello,
It may sound too easy to someone but I need to ask it anyway.
I am in the middle of building Oracle RAC 11.2.0.3 on Linux. I have 2 storage and I created three LUNs in each of storage so 6 LUNs in total look in both of servers. If I choose NORMAL as a redundancy level, is it right to choose my 6 disks those are created for OCR_VOTE at the grid installation? Or should I choose only 3 of them and configure mirroring at latter stage?
The reason why I am asking this is that I didn't find any place to create asm disk group for ocr and voting disks at the oracle grid infrastructure installation window. In fact, I would to like to create two disk groups in which one of groups contains three disks those were brought from storage 1 and the second one contains rest three 3 disk that come from the last storage.
I believe that you will understand the manner and help me on choosing proper way.
Thank you.

Hi,
You have 2 Storage H/W.
You will need to configure a Quorum ASMDisk to store a Voting Disk.
Because if you lose 1/2 or more of all of your voting disks, then nodes get evicted from the cluster, or nodes kick themselves out of the cluster.
You must have the odd number of voting disk (i.e 1,3 or 5) one voting disk per ASM DISK, So 1 Storage will hold more voting disk than another storage.
(e.g 3 Voting Disk - 2 voting stored in stg-A and 1 voting disk store in stg-B)
If fail the storage that hold the major number of Voting disk the whole cluster (all nodes) goes down. Does not matter if you have a other storage online.
It will happen:
https://forums.oracle.com/message/9681811#9681811
You must configure your Clusterware same as RAC extended
Check this link:
http://www.oracle.com/technetwork/database/clusterware/overview/grid-infra-thirdvoteonnfs-131158.pdf
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Hello, I am trying to install Grid Infrastructure 11gR2 on 2 sun nodes (Solaris 10) in order to try the product. but I am finding an error on the second node. After installing the software on both nodes and executing root.sh in the first node, the second node is complaining about the device I have defined for OCR, voting and ASM (the easiest scenary, 1 diskgroup for OCR, voting and ASM with 1 disk ) :
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Hi Gurus,
I have similar problems on very first node1, it cannot create the diskgroup when running the root.sh. here is my configuration
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all the permissions are 777 on /dev/rdsk/c1t*d0s1 and ownership grid:oinstall.
using solaris.sparc64_11gR2_grid.zip
I have installed 11gr2 rac for x86 using similar configuration with all x86 machines. but I cannot install using sparc as mentioned above. I have put some logs here
much appreciated for you help.
Thanks.
[main] [ 2012-09-11 03:43:10.363 EDT ] [SQLEngine.doSQLSubstitution:2373] The substituted sql statement:=select count(*) from v$ASM_DISKGROUP where name=upper('crsdg')
[main] [ 2012-09-11 03:43:11.070 EDT ] [UsmcaLogger.logInfo:141] CREATE DISKGROUP SQL: CREATE DISKGROUP crsdg EXTERNAL REDUNDANCY DISK '/dev/rdsk/c1t12d0s1',
'/dev/rdsk/c1t8d0s1',
'/dev/rdsk/c1t6d0s1',
'/dev/rdsk/c1t9d0s1' ATTRIBUTE 'compatible.asm'='11.2.0.0.0'
[main] [ 2012-09-11 03:44:02.639 EDT ] [SQLEngine.done:2148] Done called
[main] [ 2012-09-11 03:44:02.645 EDT ] [UsmcaLogger.logException:171] SEVERE:method oracle.sysman.assistants.usmca.backend.USMDiskGroupManager:createDiskGroups
[main] [ 2012-09-11 03:44:02.647 EDT ] [UsmcaLogger.logException:172] ORA-15018: diskgroup cannot be created
ORA-15081: failed to submit an I/O operation to a disk
[main] [ 2012-09-11 03:44:02.649 EDT ] [UsmcaLogger.logException:173] oracle.sysman.assistants.util.sqlEngine.SQLFatalErrorException: ORA-15018: diskgroup cannot be created
ORA-15081: failed to submit an I/O operation to a disk
oracle.sysman.assistants.util.sqlEngine.SQLEngine.executeImpl(SQLEngine.java:1650)
oracle.sysman.assistants.util.sqlEngine.SQLEngine.executeSql(SQLEngine.java:1898)
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Install Grid Infrastructure 11GR2

Hi all,
I have just installed Oracle Grid Infrastructure 11GR2 without having all linux packages installed like UnixODBC and 2 others.
Do you thing is it a problem ?
Thanks.

No, I don't have error message. Just one at the end when Oracle check installation.
When i launch runcluvfy i have this problem :
[grid@rac1 grid]$ ./runcluvfy.sh stage -post crsinst -n rac1,rac2 -verbose
ExÃ©cution de post-vÃ©rifications pour configuration des services de cluster
VÃ©rification de l'accessibilitÃ© du noeud...
VÃ©rification : accessibilitÃ© du noeud "rac1"
Noeud de destination Accessible ?
rac2 oui
rac1 oui
RÃ©sultat : SuccÃ¨s de la vÃ©rification de l'accessibilitÃ© du noeud "rac1"
VÃ©rification de l'Ã©quivalence utilisateur...
VÃ©rification : Ã©quivalence de l'utilisateur "grid"
Nom de noeud Commentaire
rac2 rÃ©ussi
rac1 rÃ©ussi
RÃ©sultat : SuccÃ¨s de la vÃ©rification de l'Ã©quivalence de l'utilisateur "grid"
VÃ©rification de la cohÃ©rence des fuseaux horaires...
SuccÃ¨s de la vÃ©rification de la cohÃ©rence des fuseaux horaires.
VÃ©rification de l'intÃ©gritÃ© du gestionnaire de clusters...
VÃ©rification du dÃ©mon CSS...
Nom de noeud Statut
rac2 en cours d'exÃ©cution
rac1 en cours d'exÃ©cution
Oracle Cluster Synchronization Services est en ligne.
SuccÃ¨s de la vÃ©rification de l'intÃ©gritÃ© du gestionnaire de clusters
La vÃ©rification des attributs Udev pour Emplacements d'OCR a dÃ©marrÃ©...
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La vÃ©rification des attributs Udev pour Emplacements des disques "votants" a dÃ©marrÃ©...
RÃ©sultat : VÃ©rification des attributs Udev rÃ©ussie pour Emplacements des disques "votants"
VÃ©rifier le masque de crÃ©ation du fichier utilisateur par dÃ©faut
Nom de noeud Disponible Obligatoire Commentaire
rac2 0022 0022 rÃ©ussi
rac1 0022 0022 rÃ©ussi
RÃ©sultat : SuccÃ¨s de la vÃ©rification du masque de crÃ©ation du fichier utilisateur par dÃ©faut
VÃ©rification de l'intÃ©gritÃ© du cluster...
Nom de noeud
rac1
rac2
VÃ©rification de l'intÃ©gritÃ© du cluster rÃ©ussie
VÃ©rification de l'intÃ©gritÃ© d'OCR...
VÃ©rification de l'absence de configuration hors cluster...
Tous les noeuds sans configuration locale hors cluster
SuccÃ¨s de la vÃ©rification de l'exÃ©cution d'ASM. ASM est en cours d'exÃ©cution sur tous les noeuds de cluster
VÃ©rification du fichier de configuration OCR "/etc/oracle/ocr.loc"...
Fichier de configuration OCR "/etc/oracle/ocr.loc" vÃ©rifiÃ©
Le groupe de disques pour l'emplacement OCR "+DATA" est disponible sur tous les noeuds
VÃ©rification de la taille de l'emplacement OCR "+DATA"...
VÃ©rification de la taille pour l'emplacement OCR "+DATA" rÃ©ussie...
VÃ©rification de la taille pour l'emplacement OCR "+DATA" rÃ©ussie...
WARNING:
Cette vÃ©rification ne prend pas en compte l'intÃ©gritÃ© du contenu d'OCR. ExÃ©cutez 'ocrcheck' en tant qu'utilisateur disposant de privilÃ¨ges pour vÃ©rifier le contenu d'OCR.
SuccÃ¨s de la vÃ©rification de l'intÃ©gritÃ© d'OCR
VÃ©rification de l'intÃ©gritÃ© de CRS...
Le clusterware Oracle est en bon Ã©tat sur le noeud "rac2"
Le clusterware Oracle est en bon Ã©tat sur le noeud "rac1"
SuccÃ¨s de la vÃ©rification de l'intÃ©gritÃ© de CRS
VÃ©rification de l'existence de l'application de noeud...
VÃ©rification de l'existence de l'application de noeud VIP
Nom de noeud Obligatoire Statut Commentaire
rac2 oui en ligne rÃ©ussi
rac1 oui en ligne rÃ©ussi
RÃ©sultat : VÃ©rification rÃ©ussie.
VÃ©rification de l'existence de l'application de noeud ONS
Nom de noeud Obligatoire Statut Commentaire
rac2 non en ligne rÃ©ussi
rac1 non en ligne rÃ©ussi
RÃ©sultat : VÃ©rification rÃ©ussie.
VÃ©rification de l'existence de l'application de noeud GSD
Nom de noeud Obligatoire Statut Commentaire
rac2 non n'existe pas ignorÃ©
rac1 non n'existe pas ignorÃ©
RÃ©sultat : VÃ©rification ignorÃ©e.
VÃ©rification de l'existence de l'application de noeud EONS
Nom de noeud Obligatoire Statut Commentaire
rac2 non en ligne rÃ©ussi
rac1 non en ligne rÃ©ussi
RÃ©sultat : VÃ©rification rÃ©ussie.
VÃ©rification de l'existence de l'application de noeud NETWORK
Nom de noeud Obligatoire Statut Commentaire
rac2 non en ligne rÃ©ussi
rac1 non en ligne rÃ©ussi
RÃ©sultat : VÃ©rification rÃ©ussie.
VÃ©rification du nom d'accÃ¨s du client unique (SCAN, Single Client Access Name)...
Nom d'adresse IP virtuelle SCAN Noeud En cours d'exÃ©cution ? ListenerName Port En cours d'exÃ©cution ?
rac-cluster-lpt-scan rac1 true LISTENER 1521 true
VÃ©rification de la configuration de la rÃ©solution de noms pour "rac-cluster-lpt-scan"...
ERROR:
PRVF-4664 : EntrÃ©es de rÃ©solution de noms incohÃ©rentes dÃ©tectÃ©es pour le nom SCAN "rac-cluster-lpt-scan"
Nom SCAN Adresse IP Statut Commentaire
rac-cluster-lpt-scan 10.176.1.181 en Ã©chec EntrÃ©e NIS
ERROR:
PRVF-4657 : Echec de la vÃ©rification de la configuration de la rÃ©solution de noms pour "rac-cluster-lpt-scan" (adresse IP : 10.176.1.181)
ERROR:
PRVF-4664 : EntrÃ©es de rÃ©solution de noms incohÃ©rentes dÃ©tectÃ©es pour le nom SCAN "rac-cluster-lpt-scan"
Echec de la vÃ©rification de la configuration de l'adresse IP virtuelle SCAN et du processus d'Ã©coute
OCR dÃ©tectÃ© sur ASM. ExÃ©cution de vÃ©rifications de l'intÃ©gritÃ© d'ACFS...
DÃ©marrage de la vÃ©rification pour contrÃ´ler si ASM est en cours d'exÃ©cution sur tous les noeuds de cluster...
SuccÃ¨s de la vÃ©rification de l'exÃ©cution d'ASM. ASM est en cours d'exÃ©cution sur tous les noeuds de cluster
DÃ©marrage de la vÃ©rification des groupes de disques pour contrÃ´ler si au moins un groupe de disques est configurÃ©...
SuccÃ¨s de la vÃ©rification des groupes de disques. Au moins un groupe de disques a Ã©tÃ© configurÃ©
SuccÃ¨s de la vÃ©rification de l'intÃ©gritÃ© d'ACFS de tÃ¢che
VÃ©rification de la configuration de disque "votant" de cluster Oracle...
SuccÃ¨s de la vÃ©rification de la configuration de disque "votant" de cluster Oracle
VÃ©rification de la non-appartenance de l'utilisateur "grid" au groupe "root"
Nom de noeud Statut Commentaire
rac2 n'existe pas rÃ©ussi
rac1 n'existe pas rÃ©ussi
RÃ©sultat : L'utilisateur "grid" ne fait pas partie du groupe "root". SuccÃ¨s de la vÃ©rification
VÃ©rification de l'installation du clusterware sur tous les noeuds...
SuccÃ¨s de la vÃ©rification de l'installation de clusterware
VÃ©rification de l'exÃ©cution de la ressource CTSS sur tous les noeuds...
VÃ©rification : ressource CTSS exÃ©cutÃ©e sur tous les noeuds
Nom de noeud Statut
rac2 rÃ©ussi
rac1 rÃ©ussi
RÃ©sultat : SuccÃ¨s de la vÃ©rification de la ressource CTSS
Interrogation de CTSS pour le dÃ©calage horaire sur tous les noeuds...
RÃ©sultat : SuccÃ¨s de l'interrogation de CTSS pour le dÃ©calage horaire
VÃ©rification de l'Ã©tat de CTSS dÃ©marrÃ©e...
VÃ©rification : Ã©tat de CTSS
Nom de noeud Etat
rac2 Observateur
rac1 Observateur
L'Ã©tat de CTSS est Observateur. Permutation vers des vÃ©rifications de la synchronisation d'horloge Ã l'aide du protocole NTP
DÃ©marrage des vÃ©rifications de la synchronisation d'horloge Ã l'aide du protocole NTP (Network Time Protocol)...
La vÃ©rification du fichier de configuration NTP a dÃ©marrÃ©...
Le fichier de configuration NTP "/etc/ntp.conf" est disponible sur tous les noeuds
SuccÃ¨s de la vÃ©rification du fichier de configuration NTP
VÃ©rification de l'activitÃ© du dÃ©mon...
VÃ©rification : activitÃ© de "ntpd"
Nom de noeud En cours d'exÃ©cution ?
rac2 oui
rac1 oui
RÃ©sultat : SuccÃ¨s de la vÃ©rification de l'activitÃ© pour "ntpd"
Recherche de l'option de rotation "-x" dans la ligne de commande du dÃ©mon NTP
VÃ©rification : ligne de commande du dÃ©mon NTP
Nom de noeud Option de rotation dÃ©finie ?
rac2 oui
rac1 oui
RÃ©sultat :
Option de rotation du dÃ©mon NTP vÃ©rifiÃ©e
Recherche de l'option de rotation "-x" dans la configuration du temps d'amorÃ§age du dÃ©mon NTP, dans le fichier "/etc/sysconfig/ntpd"
VÃ©rification : configuration du temps d'amorÃ§age du dÃ©mon NTP
Nom de noeud Option de rotation dÃ©finie ?
rac2 oui
rac1 oui
RÃ©sultat :
VÃ©rification de l'option de rotation dans la configuration du temps d'amorÃ§age du dÃ©mon NTP exÃ©cutÃ©e
La vÃ©rification du serveur d'horloge NTP commun a dÃ©marrÃ©...
Le serveur d'horloge NTP "195.83.132.135" est commun Ã tous les noeuds sur lesquels il est en cours d'exÃ©cution
Le serveur d'horloge NTP ".LOCL." est commun Ã tous les noeuds sur lesquels il est en cours d'exÃ©cution
SuccÃ¨s de la vÃ©rification du serveur d'horloge NTP commun
La vÃ©rification du dÃ©calage de l'horloge par rapport au serveur d'horloge NTP a dÃ©marrÃ©...
VÃ©rification sur les noeuds "[rac2, rac1]"...
VÃ©rification : dÃ©calage de l'horloge par rapport au serveur d'horloge NTP
Serveur d'horloge : 195.83.132.135
Limite de dÃ©calage horaire : 1000.0 ms
Nom de noeud DÃ©calage horaire Statut
rac2 -2.734 rÃ©ussi
rac1 -1.906 rÃ©ussi
Les dÃ©calages horaires du serveur d'horloge "195.83.132.135" se trouvent dans les limites autorisÃ©es pour les noeuds "[rac2, rac1]".
Serveur d'horloge : .LOCL.
Limite de dÃ©calage horaire : 1000.0 ms
Nom de noeud DÃ©calage horaire Statut
rac2 0.0 rÃ©ussi
rac1 0.0 rÃ©ussi
Les dÃ©calages horaires du serveur d'horloge ".LOCL." se trouvent dans les limites autorisÃ©es pour les noeuds "[rac2, rac1]".
SuccÃ¨s de la vÃ©rification du dÃ©calage de l'horloge
RÃ©sultat : VÃ©rification de la synchronisation d'horloge Ã l'aide du protocole NTP (Network Time Protocol) rÃ©ussie
SuccÃ¨s de la vÃ©rification d'Oracle Cluster Time Synchronization Services
Echec de la post-vÃ©rification de configuration des services de cluster sur tous les noeuds.
[grid@rac1 grid]$

Grid infra 11gR2 installation help required

sir
i have some problem.do not know how to solve it?
i need to install grid infrastructure advanced installation.
scenario and question:
i have a raw(74GB) device under ASM on 192.168.1.13.but how to put it into the cluster its not under OCFS2,what to do(under OEL5.4)?
and in another machine(with ip 192.168.1.30) i want to load 11gR2 grid as well as 11gR2 db but how to qualify it to the cluster-aware ASM-ocfs2 disk??i had a a partition /dev/sda3 as LVM group with two mounted partion /ASM1 and /ASM2 as empty ext3 in this machine.what to do?
regards

I guess this will help-- http://blog.ronnyegner-consulting.de/2009/09/14/oracle-11g-release-2-install-guide-%e2%80%93-grid-infrastructure-installation/
-- http://husnusensoy.wordpress.com/2009/10/30/how-to-install-oracle-11g-release-2-on-oel-5-4-on-virtualbox-installing-grid-infrastructure/
To identify the storage requirements for using Automatic Storage Management, you must determine the number of devices and the amount of free disk space that you require. To complete this task:
1.     Determine whether you want to use Automatic Storage Management for Oracle Database files, recovery files, or both.
Note:
You do not have to use the same storage mechanism for , Oracle Database files, and recovery files. You can use a file system for one file type and Automatic Storage Management for the other.
If you choose to enable automated backups and you do not have a shared file system available, then you must choose Automatic Storage Management for recovery file storage.
If you plan to enable automated backups during the installation, then you can choose Automatic Storage Management as the storage mechanism for recovery files by specifying an Automatic Storage Management disk group for the fast recovery area. Depending on how you choose to create a database during the installation, you have the following options:
o     If you select an installation method that runs Oracle Automatic Storage Management Configuration Assistant in interactive mode, then you can decide whether you want to use the same Automatic Storage Management disk group for database files and recovery files, or you can choose to use different disk groups for each file type. Ideally, you should create separate Automatic Storage Management disk groups for data files and for recovery files.
The same choice is available to you if you use Oracle Database Configuration Assistant after the installation to create a database.
o     If you select an installation type that runs Oracle Automatic Storage Management Configuration Assistant in silent or response file mode, then you must use the same Automatic Storage Management disk group for data files and recovery files.
2.     Choose the Automatic Storage Management redundancy level that you want to use for each Automatic Storage Management disk group that you create.
The redundancy level that you choose for the Automatic Storage Management disk group determines how Automatic Storage Management mirrors files in the disk group and determines the number of disks and amount of disk space that you require, as follows:
o     External redundancy
This option does not allow Automatic Storage Management to mirror the contents of the disk group. Oracle recommends that you select this redundancy level either when the disk group contains devices, such as RAID devices, that provide their own data protection or when the database does not require an uninterrupted access to data.
o     Normal redundancy
To optimize performance and reliability in a normal redundancy disk group, Automatic Storage Management uses two-way mirroring for data files and three-way mirroring for control files, by default. In addition, you can choose the mirroring characteristics for individual files in a disk group. Alternatively, you can use two-way mirroring or no mirroring.
A normal redundancy disk group requires a minimum of two failure groups (or two disk devices) if you are using two-way mirroring. The effective disk space in a normal redundancy disk group is half the sum of the disk space in all of its devices.
For most installations, Oracle recommends that you use normal redundancy disk groups.
o     High redundancy
The contents of the disk group are three-way mirrored by default. To create a disk group with high redundancy, you must specify at least three failure groups (a minimum of 3 devices).
Although high-redundancy disk groups provide a high level of data protection, you must consider the higher cost of additional storage devices before deciding to use this redundancy level.
3.     Determine the total amount of disk space that you require for the database files and recovery files.
If an Automatic Storage Management instance is already running on the system, then you can use an existing disk group to meet these storage requirements. If necessary, you can add disks to an existing disk group during the installation.
Use the following table to determine the minimum number of disks and the minimum disk space requirements for the installation:
Redundancy Level     Minimum Number of Disks     Data Files     Recovery Files     Both File Types
External     1     1.8 GB     3.6 GB     5.4 GB
Normal     2     3.6 GB     7.2 GB     10.8 GB
High     3     5.4 GB     10.8 GB     16.2 GB
4.     Optionally, identify failure groups for the Automatic Storage Management disk group devices.
If you intend to use a normal or high redundancy disk group, then you can further protect the database against hardware failure by associating a set of disk devices in a custom failure group. By default, each device comprises its failure group. However, if two disk devices in a normal redundancy disk group are attached to the same SCSI controller, then the disk group becomes unavailable if the controller fails. The controller in this example is a single point of failure.
To avoid failures of this type, you can use two SCSI controllers, each with two disks, and define a failure group for the disks attached to each controller. This configuration would enable the disk group to tolerate the failure of one SCSI controller.
Note:
If you define custom failure groups, then you must specify a minimum of two failure groups for normal redundancy disk groups and three failure groups for high redundancy disk groups.
5.     If you are sure that a suitable disk group does not exist on the system, then install or identify appropriate disk devices to add to a new disk group. Apply the following guidelines when identifying appropriate disk devices:
o     The disk devices must be owned by the user performing the grid installation.
o     All the devices in an Automatic Storage Management disk group should be the same size and have the same performance characteristics.
o     Do not specify multiple partitions on a single physical disk as a disk group device. Automatic Storage Management expects each disk group device to be on a separate physical disk.
o     Oracle does not recommend the use of a logical volume as a device in Automatic Storage Management because the logical volume is capable of hiding the physical disk architecture which prevents Automatic Storage Management from optimizing I/O across physical devices.

Disks don't show --- Solaris 10, Grid Infrastructure 11gR2 Install

I am installing 11gR2 grid infrastructure on a standalone server. It is SPARC Solaris 10. Followed the documentation for preparing disk partitions for ASM. But after launching runInstaller, at step of "Create ASM disk group", no disk shows up. Therefore disk group cannot be created. And the installation cannot continue. Tried ORCL:* for Change Discovery Path. It did not work.
Any help is appreciated.

Hi.
do you on a step at the installation of the ASM or is the ASM Instance installed and ready to use ?
Check the asm_diskstring parameter in the pfile if the ASM can discover the drives correctly .
Are you create a partition our ASM drives ?.
*T

How many users for Lightroom 5?

Hi, can anyone tell me how many installs you can have on a single copy of Lightroom 5 (Can you have it on 2 computers at once or just 1)? Also does this differ between digital download copies and hard copies?
Thanks.

2 computers for a single user not being used at the same time.

How many users for remote connection can I create, from support SAP

Dear all
I have a doubt with how many users can be created in my system ERP 6.0 for the remote connection, for the error product messages on the marketplace SAP,without this counts as user license.
I have not found any notes or documents from SAP to explain this.
I appreciate your help.
Best Regards,
Erika

Ok...I will reply to myself. I can use more than 10 simultaneous connection, using vnc.

How many disk for redundancy on Grid Infrastructure 11gR2 Installation?

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