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In order to manage XtremIO in Cisco UCS Director, the XMS Host IP is used when adding a physical account in Cisco UCS Director.
A Volume is a set of blocks, presented to the operating environment as a range of consecutive logical blocks with disk-like storage and I/O semantics. It is possible to define various percentages of disk space as Volumes in an active cluster.
The XtremIO Storage Array uses the term "Initiators" to refer to ports that can access a Volume. Initiators are managed in the XtremIO Storage Array by assigning them to an Initiator Group. The Initiators within an Initiator Group share access to one or more of the cluster's Volumes.
Initiators are added to the cluster by defining them in an Initiator Group. You can define Initiators when adding a group, or later define them by using the Edit Initiator Group option. To remove an Initiator, edit the group and delete the Initiator's properties.
When mapping a Volume to an Initiator Group, a Logical Unit Number (LUN) is automatically assigned.
You can map an Initiator Group to multiple Volumes. The Initiator Group's first mapping receives a LUN of 1. Additional mappings receive LUNs in sequential order. These numbers cannot be changed later so any change must be specified during LUN creation.
Consistency Groups (CG) are used to create a consistent image of a set of Volumes, usually used by a single application, such as a database. With XtremIO CGs, you can create a Snapshot of all Volumes in a group, using a single command. This ensures that all Volumes are created at the same time. Many operations that are applied on a single Volume can also be applied on a CG.
To establish an iSCSI connection for transferring data, first define an iSCSI portal. An iSCSI portal is an IPv4 address and port associated with a Target port. Each iSCSI Target can be associated with multiple portals. If an IP connection requires routing to remote networks, you can define routing rules that apply to the iSCSI Target ports only.
Snapshots are instantaneous copy images of Volume data. The state of the data captured is exactly as it appeared at the specific point in time that the Snapshot was created. This enables you to save the Volume data state and then access the specific Volume data whenever needed, including after the source Volume has changed.
A Snapshot can be taken either directly from a source Volume or from other Snapshots within a source Volume’s group (Volume Snapshot Group). XtremIO Snapshots are by default read-write, but can be created as read-only to maintain immutability.
The source data remains available without interruption, while the Snapshot can be used to perform other functions on the data. Changes made to the Snapshot’s source do not affect the Snapshot data.
XtremIO Snapshots are space-efficient both in terms of metadata consumed and physical capacity. Snapshots are implemented using redirect-on-write methodology. New writes to the source Volume (or Snapshot) are redirected to new locations, and only metadata is updated to point to the new data location. This method guarantees that there is no performance degradation while Snapshots are created.
Note | The Create Snapshot Set feature is also available under the Snapshots tab. The steps used to create a Snapshot Set are identical. |
Cisco UCS Director XtremIO provides the following System Reports:
The following reports are displayed as child reports under the Clusters Report.
To view a System Report, do the following: