Features supported

The xapi storage interface supports the following features:

• Storage Repositories: collections of Volumes on the same storage substrate
• Volumes may be created, cloned, snapshotted, queried, attached to and detached from VMs
• Storage Repositories can be incrementally probed; for example given only an iSCSI target portal, the IQNs and then the LUNs can be discovered.
• Everything is named by URIs, where the scheme describes the protocol used to access the data (e.g. file, iscsi)
• Implementations expose capabilities and these are reported via the XenAPI
• Dynamic properties (such as space utilisation, I/O bandwidth and latency) can be exposed as "datasources" which are compatible with the xapi toolstack RRD framework.
• The storage implementation can be used to store the xapi HA statefile and database redo logs
• If the storage implementation supports fast clone, then it will work with the xapi "clone on boot" feature

Features not currently supported

The following features are not supported:

• Storage motion: this requires a redesign of the mirroring code in tapdisk.