Flexible disk layout enhances the storage flexibility and lets you add additional disks to a node. You can also add the disks when you create an application blueprint. The disks are created dynamically during provisioning and added to the node.

About this task

You can also manage placing the disks on different datastores. Once the user defines the flexible disk layout for nodes in the blueprint, application deployer can further customize the deployment:

  • Map each individual disk to specific datastore

  • Set the disk size for each additional disk

The additional disks are part of virtual machine node. Both the service that uses the disks and the user who uses the service, define the disks. Because of this, some assumptions are made between the service and the user.

For example, If an Oracle service requires at least one data disk and one redo log disk to work, the user must add two disks to the node else the service script does not run correctly.

Note:

You cannot specify different disk settings for an individual node in a same node array.

Databases can leverage flexible disk layout. The new Oracle 11g database service is added in Application Services as out-of-the-box service. This service is modified to leverage flexible disk layout.

Prerequisites

Familiarize yourself with the predefined disk layout Info property when you plan to add multiple disks in a virtual machine. See Predefined Disk Layout Info Property

Procedure

  1. Select the node and click New on the Disks tab below the blueprint.

    Consider the following options when you add a disk to your application blueprint:

    Table 1. Disk Options

    Option

    Description

    Name

    The unique disk name within the node.

    Mount Path

    The path for the disk to be mounted. Application Services does not mount the disk if the mount path is not specified or if the disk is not formatted.

    File System

    File systems such as ext3 or NTFS can be specified.

    Size (GB)

    The size of the disk to be provisioned.

    Tags

    A string specified that you can leverage to determine the mapping between disk and storage.

    Description

    Specify more information for the disk.

  2. (Optional) Assign each additional disk with multiple disk tags.

    Each disk tag can be used for multiple disks in the disk layout information. The disk tag is used to indicate the disk usage purpose. There are four predefined disk tags optimized for database services:

    Table 2. Disk Tags

    Tag

    Description

    Archive

    Stores database archive files.

    Binary

    Stores binary files, such as Oracle binary.

    Data

    Stores data files, such as Oracle table space files.

    Log

    Stores database online logs.

  3. When you are finished, click Save in the toolbar above the canvas.

What to do next

Deploy the application. See Deploying Applications