2.7.1 Create a Cluster Template

This topic describes how to create a user-defined cluster template.

A cluster template is a named collection of file storage attribute settings defined at the cluster level. By using cluster templates, you can manage file storage attributes automatically and consistently across the Exascale cluster.

Exascale is automatically preconfigured with cluster templates for each system-defined file type; for example, DATAFILE, ONLINELOG, CONTROLFILE, and so on. Therefore, you can only create new user templates at the cluster level.

To create a user-defined cluster template, use the ESCLI mktemplate command with the --cluster and --name options and specify the file storage attribute settings:

• --media-type: Specifies the physical media type that is used to store the file. Exascale uses this attribute to place the file in a storage pool that uses the specified media type. Possible values are:
  • HC: Identifies high capacity storage media, which uses hard disk drives (HDDs).
  • EF: Identifies extreme flash storage media, which uses flash devices.
• --redundancy: Specifies the number of data copies that are maintained. Possible values are:
  • normal: Maintains 2 mirrored copies of the file data.
  • high: Maintains 3 mirrored copies of the file data.
• --content-type: Specifies the type of content in the file. Exascale internally uses this attribute to place file extents on physically separate devices in a way that maximizes availability if failures occurs. Possible values are:
  • DATA
  • RECO

The command syntax is:

@> mktemplate --cluster --name template-name --content-type content-type --media-type media-type --redundancy redundancy