Preparing the Nodes and Disks

Preparing the nodes and disks modifies the configuration of the operating system to enable HA for Oracle Grid Engine to eliminate single points of failure in an Oracle Grid Engine system.

Before you begin, ensure that the requirements in the following sections are met:

• Memory Requirements

• Disk Space Requirements

How to Prepare the Nodes and Disks

1. Become superuser on all the cluster nodes where you are installing Oracle Grid Engine.
2. Create an administrative user account for Oracle Grid Engine on all those cluster nodes.

   Either select an existing user account other than root for the grid administration, or create an account specifically for grid administration.

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   Tip - For consistency with the Oracle Grid Engine documentation, name the account sgeadmin.

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3. Create a directory for the root of Oracle Grid Engine file system.

   # mkdir sge-root-dir

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   Note - The sge-root-dir must reside in the cluster filesystem. Refer to Configuring the HAStoragePlus Resource Type to Work With HA for Oracle Grid Engine for more details.

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4. Change the owner of the root of the Oracle Grid Engine file system to the administrative user whose account you created in Step 2.

   # chown sge-admin sge-root-dir

5. Set the mode of the root of Oracle Grid Engine file system to drwxr-xr-x .

   # chmod 755 sge-root-dir

6. Specify the port number and protocol for the sge_qmaster and sge_execd services.

   Choose an unused port number below 1024. The sge_qmaster and sge_execd services are to be provided through Transmission Control Protocol (TCP).

   To specify the port number and protocol, add the following line to the /etc/services file.

   sge_qmaster    port-no/tcp
   sge_execd      port-no/tcp

7. For each type of host in the grid, create a plain text file that contains the names of all hosts of that type in the grid.

   The install_qmaster script uses these files when you install Oracle Grid Engine. Create a separate file for each type of host in the grid:

   • Execution hosts

   • Administrative hosts

   • Submit hosts

Example 1-1 Preparing the Nodes and Disks for the Installation of Oracle Grid Engine

This example shows how to prepare the nodes and disks for an Oracle Grid Engine installation that is to be configured as follows:

• The root of Oracle Grid Engine file system is the /global/gridmaster directory. This directory resides in the cluster file system.

• The account for grid administration is named sgeadmin.

• The sge_qmaster service is to be provided through port 536 and TCP.

• The sge_execd service is to be provided through port 537 and TCP.

The sequence of operations for preparing the nodes and disks for the installation of Oracle Grid Engine is as follows:

1. To create the /global/gridmaster directory for the root of Oracle Grid Engine file system, the following command is run:

   # mkdir /global/gridmaster

2. To change the owner of the /global/gridmaster directory to the sgeadmin user, the following command is run:

   # chown sgeadmin /global/gridmaster

3. To set the mode of the /global/gridmaster directory to drwxr-xr-x, the following command is run:

   # chmod 755 /global/gridmaster

4. To specify that the sge_qmaster service is to be provided through port 536 and TCP, and that the sge_execd service is to be provided through port 537 and TCP, the following line is added to the /etc/services file:

   sge_qmaster    536/tcp
   sge_execd      537/tcp