OFFLOAD OF STORAGE NODE SCALE-OUT MANAGEMENT TO A SMART NETWORK INTERFACE CONTROLLER

• US 20200136996A1
• Filed: 12/27/2019
• Published: 04/30/2020
• Est. Priority Date: 06/29/2018
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: LI, Yadong, PETERSON, Scott D., SEN, Sujoy, MINTURN, David B.
• Granted Patent: US 11,509,606 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 12/1081 for peripheral access to main memory, e.g. direct memory access [DMA]
• CPC Class Codes: H04L 45/54 Organization of routing tables
• CPC Class Codes: H04L 45/745 Address table lookup; Address filtering
• CPC Class Codes: H04L 45/7453 using hashing
• CPC Class Codes: H04L 47/125 by balancing the load, e.g. traffic engineering
• CPC Class Codes: H04L 49/1569 Clos switching fabrics
• CPC Class Codes: H04L 49/3009 Header conversion, routing tables or routing tags
• CPC Class Codes: H04L 49/356 for storage area networks
• CPC Class Codes: H04L 67/1097 for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]
• CPC Class Codes: H04L 9/0643 Hash functions, e.g. MD5, SHA, HMAC or f9 MAC

Abstract

Examples described herein relate to a network interface that includes an initiator device to determine a storage node associated with an access command based on an association between an address in the command and a storage node. The network interface can include a redirector to update the association based on messages from one or more remote storage nodes. The association can be based on a look-up table associating a namespace identifier with prefix string and object size. In some examples, the access command is compatible with NVMe over Fabrics. The initiator device can determine a remote direct memory access (RDMA) queue-pair (QP) lookup for use to perform the access command.

Claims

1. A network interface comprising:

an initiator to determine a storage node associated with an access command based on an association between an address in the access command and a storage node and

a redirector to update the association between an address in the access command and a storage node based on messages from one or more remote storage nodes.

2. The network interface of claim 1, wherein the association comprises a namespace identifier corresponding to a prefix string and/or object size.

3. The network interface of claim 2, further comprising a table including at least one association.

4. The network interface of claim 1, wherein the access command is compatible with a protocol employed by NVMe over Fabrics.

5. The network interface of claim 1, wherein the access command comprises one or more of the following:

a write, a read, a command, and status request.

6. The network interface of claim 1, wherein the initiator is to determine a string and prefix string for a namespace.

7. The network interface of claim 6, wherein the initiator is to calculate a hash based on the string.

8. The network interface of claim 7, wherein the initiator is to determine a remote direct memory access (RDMA) queue-pair (QP) lookup using a table based on the hash.

9. The network interface of claim 1, wherein to update the association between an address in the access command and a storage node based on messages from one or more remote storage nodes and wherein a message includes a hint, the redirector is to:

based on detection that the hint is a simple hint or striped hint;

update an association between simple or striping hint with a remote direct memory access (RDMA) queue-pair (QP) number or

based on detection that the hint is a hash hint;

process a hash hint log,

update an association between a prefix string for a namespace and object size,

process the hash hint to determine a RDMA QP number used for a namespace identifier (NSID), and

update an association between a hash value to be with the determined RDMA QP number.

10. The network interface of claim 1, wherein the initiator is to identify a remote direct memory access (RDMA) queue-pair (QP) for a namespace identifier using a lookup and use the identified RDMA QP to transmit a command to a storage node.

11. The network interface of claim 1, wherein the initiator is to identify a remote direct memory access (RDMA) queue-pair (QP) for a namespace identifier (NSID) using a lookup and if an RDMA QP is not identified for an NSID, a default RDMA QP is used to transmit a command to a storage node.

12. The network interface of claim 1, comprising one or more of:

a host device, server, rack, or datacenter.

13. A method, performed in a network interface, comprising:

determining a storage node associated with an access command based on an association between an address in the access command and a storage node and

updating the association based on messages from one or more remote storage nodes.

14. The method of claim 13, wherein the association comprises a look-up table associating namespace identifier with prefix string and object size.

15. The method of claim 13, wherein the access command is compatible with NVMe over Fabrics.

16. The method of claim 13, wherein the access command comprises a write, a read, a command, or status request.

17. The method of claim 13, comprising calculating a hash based on the access command and determining a remote direct memory access (RDMA) queue-pair (QP) lookup based on the hash.

18. A system comprising:

one or more remote storage nodes and

a network interface communicatively coupled to one or more remote storage nodes, the network interface comprising;

an initiator to determine a storage node associated with an access command based on an association between an address in the access command and a storage node and

a redirector to update the association based on messages from one or more remote storage nodes.

19. The system of claim 18, wherein the association comprises a look-up table to associate a namespace identifier with prefix string and object size.

20. The system of claim 18, wherein the access command is compatible with NVMe over Fabrics.

21. The system of claim 18, wherein the initiator is to determine a remote direct memory access (RDMA) queue-pair (QP) lookup using a table based on a hash.