Discovery controller registration of non-volatile memory express (NVMe) elements in an NVMe-over-fabrics (NVMe-oF) system
Presented herein are embodiments for registering elements of a non-volatile memory express (NVMe) entity in an NVMe-over-Fabric (NVMe-oF) environment. In embodiments, a method for registering with a centralized storage fabric service component via a discovery controller (DC) of the centralize service comprises transmitting a DC registration command to the DC. In embodiments, the DC registration command includes a number of registration entries that the NVMe entity will be submitting for registration. In embodiments, the identified number of NVMe registration entries are transmitted to the centralized service and are stored in a registry. The NVMe registration entry may include an entry type for indicating an NVMe registration entry type, an NVMe qualified name (NQN) for identifying the NVMe entity, and a transport address for specifying an address of the element of the NVMe entity. Other NVMe entities may query the registry to obtain information about NVMe elements in the system.
1. A computer-implemented method for registering one or more elements of a non-volatile memory express (NVMe) entity in a NVMe over Fabric (NVMe-oF) system, comprising:
establishing a connection to a discovery controller of the NVMe-oF system;
transmitting a discovery controller registration command (DCRC) to the discovery controller, the discovery controller registration command (DCRC) comprising an identifier indicating a number of registrations to be registered with the discovery controller; and
transmitting to the discovery controller an NVMe registration for each element corresponding to the number of registrations indicated in the discovery controller registration command (DCRC), in which an NVMe registration comprises:
an indicator for indicating a type of the NVMe registration;
an NVMe qualified name (NQN) for identifying the element of the NVMe entity; and
a transport address for specifying an address for the element of the NVMe entity.
2. The computer-implemented method of claim 1 , wherein a plurality of data is registered regarding the element of the NVMe entity.
3. The computer-implemented method of claim 2 , wherein the plurality of data comprises one or more attributes, parameters, properties, or components associated with the element of the NVMe entity.
4. The computer-implemented method of claim 1 , further comprising:
authenticating the NVMe entity to the discovery controller before transmitting the discovery controller registration command (DCRC) to the discovery controller.
5. The computer-implemented method of claim 1 wherein the discovery controller comprises or has access to a datastore of NVMe registrations from a plurality of NVMe entities comprising one or more NVMe hosts and one or more non-volatile memory (NVM) subsystems and the method further comprises:
sending to the discovery controller a query to identify a listing of elements that are relevant to the NVMe entity that is sending the query, in which the listing of elements is obtained from the datastore of NVMe registrations; and
receiving, from the discovery controller, a listing of elements from the datastore of NVMe registrations that are relevant to the NVMe entity that sent the query.
6. The computer-implemented method of claim 1 , further comprising:
listening for an asynchronous event message generated by the discovery controller; and
performing one or more connectivity actions, one or more discovery actions, or both in response to information received in the asynchronous event message.
7. The computer-implemented method of claim 1 , wherein the NVMe registration further comprises a symbolic name for the element of the NVMe entity.
8. The computer-implemented method of claim 1 , wherein the NVMe entity is an NVMe host and the NVMe registration further comprises a host identifier for the NVMe host.
9. A non-transitory computer-readable medium or media comprising one or more sequences of instructions which, when executed by one or more processors, causes steps to be performed for registering one or more elements of a non-volatile memory express (NVMe) entity in a NVMe over Fabric (NVMe-oF) system, comprising:
establishing a connection to a discovery controller of the NVMe-oF system;
transmitting a discovery controller registration command (DCRC) to the discovery controller, the discovery controller registration command (DCRC) comprising an identifier indicating a number of registrations to be registered with the discovery controller; and
transmitting to the discovery controller an NVMe registration for each element corresponding to the number of registrations indicated in the discovery controller registration command (DCRC), in which an NVMe registration comprises:
an indicator for indicating a type of the NVMe registration;
an NVMe qualified name (NQN) for identifying the element of the NVMe entity; and
a transport address for specifying an address for the element of the NVMe entity.
10. The non-transitory computer-readable medium or media of claim 9 , wherein a plurality of data is registered regarding the element of the NVMe entity and the plurality of data comprises one or more attributes, parameters, properties, or components associated with the element of the NVMe entity.
11. The non-transitory computer-readable medium or media of claim 9 , wherein the discovery controller comprises a datastore of NVMe registrations from a plurality of NVMe entities comprising one or more NVMe hosts and one or more non-volatile memory (NVM) subsystems and the non-transitory computer-readable medium or media further comprises one or more sequences of instructions which, when executed by one or more processors, causes steps to be performed comprising:
sending to the discovery controller a query to identify a listing of elements that are relevant to the NVMe entity that is sending the query, in which the listing of elements is obtained from the datastore of NVMe registrations; and
receiving, from the discovery controller, a listing of elements from the datastore of NVMe registrations that are relevant to the NVMe entity that sent the query.
12. The non-transitory computer-readable medium or media of claim 9 , further comprising one or more sequences of instructions which, when executed by one or more processors, causes steps to be performed comprising:
listening for an asynchronous event message generated by the discovery controller; and
performing one or more connectivity actions, one or more discovery actions, or both in response to information received in the asynchronous event message.
13. The non-transitory computer-readable medium or media of claim 9 , wherein the NVMe registration further comprises a symbolic name for the NVMe entity.
14. The non-transitory computer-readable medium or media of claim 9 , wherein the NVMe entity is an NVMe host and the NVMe registration further comprises a host identifier for the NVMe host.
15. A system for registering one or more elements of a non-volatile memory express (NVMe) entity in a NVMe over Fabric (NVMe-oF) system, comprising
one or more processors; and
a non-transitory computer-readable medium or media comprising one or more sets of instructions which, when executed by at least one of the one or more processors, causes steps to be performed comprising:
establishing a connection to a discovery controller of the NVMe-oF system;
transmitting a discovery controller registration command (DCRC) to the discovery controller, the discovery controller registration command (DCRC) comprising an identifier indicating a number of registrations to be registered with the discovery controller; and
transmitting to the discovery controller an NVMe registration for each element corresponding to the number of registrations indicated in the discovery controller registration command (DCRC), in which an NVMe registration comprises:
an indicator for indicating a type of the NVMe registration;
an NVMe qualified name (NQN) for identifying the element of the NVMe entity; and
a transport address for specifying an address for the element of the NVMe entity.
16. The system of claim 15 , wherein a plurality of data is registered regarding the element of the NVMe entity and the plurality of data comprises one or more attributes, parameters, properties, or components associated with the element of the NVMe entity.
17. The system of claim 15 , wherein the discovery controller comprises a datastore of NVMe registrations from a plurality of NVMe entities comprising one or more NVMe hosts and one or more non-volatile memory (NVM) subsystems and the non-transitory computer-readable medium or media further comprises one or more sequences of instructions which, when executed by one or more processors, causes steps to be performed comprising:
sending to the discovery controller a query to identify a listing of elements that are relevant to the NVMe entity that is sending the query, in which the listing of elements is obtained from the datastore of NVMe registrations; and
receiving, from the discovery controller, a listing of elements from the datastore of NVMe registrations that are relevant to the NVMe entity that sent the query.
18. The system of claim 15 , further comprising one or more sequences of instructions which, when executed by one or more processors, causes steps to be performed comprising:
listening for an asynchronous event message generated by the discovery controller; and
performing one or more connectivity actions, one or more discovery actions, or both in response to information received in the asynchronous event message.
19. The system of claim 15 , wherein the NVMe registration further comprises a symbolic name for the NVMe entity.
20. The system of claim 15 , wherein the NVMe entity is an NVMe host and the NVMe registration further comprises a host identifier for the NVMe host.