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Donald K. Burleson

Oracle9i RAC Tips

Creating the Cluster:

The cluster creation process is performed in two phases:

  • A cluster is constructed with only a single member system (the one on which you just installed the Tru64 UNIX operating system).

  • Other member systems are added to the cluster.

Use the “build” disk you are running on and, as root, issue one command:

# /usr/sbin/clu_create

The clu_create command builds a single member cluster. This command issues a sequence of prompts from which the needed information is supplied to build the cluster. A sample setup is shown below:

Cluster name: demo-cluster.xyz.com

Note: The cluster name should include the full Internet domain qualification if the hostname given to the primary member system includes Internet domain qualification.

  • Cluster alias IP address - 192.168.1.10

  • Device name of cluster root partition - dsk3a

  • Device name of cluster usr partition - dsk3g

  • Device name of cluster var partition - dsk3h

  • Device name of quorum disk - dsk4

  • Number of votes for quorum disk - 1

  • Member ID - 1

  • Device name of member’s boot disk - dsk1

  • Cluster virtual interconnect name - [accept defaults]

  • Cluster virtual interconnect IP address - [accept defaults]

When the first member is booted, the cluster will be up and running.

On the primary member system, when the command clu_add_member is run, it will issue a sequence of prompts that request information to establish the second cluster member. In fact, this is the only command required to add additional cluster members to the same cluster.

The following shows the prompts and their appropriate responses for each new cluster member:

Second Cluster Member Information

  • Member’s hostname alpha2.xyz.com

Note: The cluster name should include the full Internet domain qualification if the hostname given to the primary member system includes Internet domain qualification.

  • Member ID 2

  • Number of votes for this member 1

  • Device name of member’s boot disk dsk2

  • Cluster virtual interconnect name [accept default]

  • Cluster virtual interconnect IP address [accept default]

  • TruCluster Server license Enter License Info

Next, install initializes and does the following:

  • Initializes hardware before booting.

  • Boots and joins the cluster.

  • Adds member boot disks.

  • Adds cluster system disks.

  • Adds cluster file system and database disks.

  • Runs system subset configuration.

  • Performs kernel build.

For more information, see the book Oracle 11g Grid and Real Application Clusters  - 30% off if you buy it directly from Rampant TechPress .  Written by top Oracle experts, this RAC book has a complete online code depot with ready to use RAC scripts.

For more details and scripts, see my new book " Oracle Tuning: The Definitive Reference", over 900 pages of BC's favorite tuning tips & scripts. 

You can buy it direct from the publisher for 30%-off and get instant access to the code depot.
 
 


 

 

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