This section explains the preparations for setting up storage.
Supported Storage Configurations
The supported storage configurations are as follow:
Remote access storage (one of iSCSI, NFS, or HBA) supported by Citrix XenServer
For details on the storage supported by Citrix XenServer, refer to the Citrix XenServer manual.
Check in advance that the storage repository to use is shared with all VM hosts in the Citrix XenServer pool.
Effective Utilization of Storage Using Thin Provisioning
In this manual, for the disks of Citrix XenServer, sparse allocation is regarded as Thin Provisioning, and non-sparse allocation is regarded as Thick Provisioning.
Thin provisioning is technology for virtualizing storage capacities.
It enables efficient utilization of storage.
The function does not require the necessary storage capacity to be secured in advance, and can secure and extend the storage capacity according to how much is actually being used.
Citrix XenServer can realize Thin Provisioning using an NFS storage repository.
In Resource Orchestrator, configure Thin Provisioning as follows:
When registering an NFS storage repository as a virtual storage resource registered in a storage pool with Thin Provisioning attributes set, set the thin format and allocate the disk resources to an L-Server.
For how to set thin provisioning attributes for a storage pool, refer to "20.2 Creating" in the "User's Guide for Infrastructure Administrators (Resource Management) CE".
For details on the display of available free space of storage pools and the calculation method for free space, refer to "20.6 Viewing" in the "User's Guide for Infrastructure Administrators (Resource Management) CE".
Note
When registering a NFS storage repository as a virtual storage resource in a storage pool without Thin Provisioning attributes set, as calculation is performed assuming that the necessary amount of space has been allocated, the amount of available space is less than the actual free space.
When registering a storage repository other than NFS as a virtual storage resource registered in a storage pool with Thin Provisioning attributes set, secure the necessary space, and allocate the disk resources to an L-Server.
Allocating Storage to a Virtual L-Server
When a VM host is registered as storage management software, the storage repositories made beforehand are detected automatically as a virtual storage resource.
From the detected virtual storage resources, virtual storage resources meeting virtual L-Server specifications are automatically selected by Resource Orchestrator.
(Virtual storage resources registered in a storage pool where the priority level is high and virtual storage resources with a high capacity are selected by priority.)
From the automatically selected virtual storage resources, disk resources (such as virtual disks) of the specified size are automatically created and allocated to the virtual L-Server.
Information
The storage repository name is used for the virtual storage resource name.
However, when characters other than the following are included in a datastore name, they are replaced with hyphens ("-").
Numerals (0 to 9)
Alphabetical characters: upper case (A to Z), lower case (a to z)
Hyphens ("-") and underscores ("_")
When a multibyte character is contained in the name of storage repository, it is not detected.
When this product manages two or more types of storage management software, there may be multiple storage repositories with the same name. In that case, the form of virtual storage resource names is the datastore name + "_" + serial number (Example: "_1").
