You are using AFF storage with the NVMe storage protocol on your Linux clients.
In this scenario, which NVMe feature must be present and enabled for the client to see storage failover happen?
You are using AFF storage with the NVMe storage protocol on your Linux clients.
In this scenario, which NVMe feature must be present and enabled for the client to see storage failover happen?
Asymmetric Namespace Access (ANA) is a vital feature for NVMe storage systems to ensure proper failover capabilities. ANA provides a mechanism for NVMe devices to report the state and availability of namespaces to the host, allowing the host to make intelligent decisions about which paths to use for I/O operations. This is particularly important in scenarios involving high availability and failover. Without ANA, the client would not have the information needed to correctly handle storage failover.
Since its NVME protocol and LINUX clients which use DM-multipathing and NOT MPIO (which is for Windows clients). The feature would have to be ANA Answer: A https://docs.netapp.com/us-en/ontap-fli/pdfs/sidebar/Verifying_host_LUN_path_and_multipath_configuration_verification.pdf
A- ANA - The ONTAP implementation of NVMe/FC requires application-level high availability. If a controller loss or path failure occurs, the application host must manage path failover to its (application) HA partner. This limitation exists because the NVMe multipathing specification called ANA, analogous to ALUA in SCSI protocol, was still under development. While implementing NVMe/FC, NetApp helped design the ANA protocol in the NVMe forum, where it was recently ratified. A future release of ONTAP will offer support for this enhancement.