Remote direct memory access (RDMA) optimized high availability for in-memory data storage
View Patent ↗A method for RDMA optimized high availability for in-memory storing of data includes receiving RDMA key-value store write requests in a network adapter of a primary computing server directed to writing data to an in-memory key-value store of the primary computing server and performing RDMA write operations of the data by the network adapter of the primary computing server responsive to the RDMA key-value store write requests. The method also includes replicating the RDMA key-value store write requests to a network adapter of a secondary computing server, by the network adapter of the primary computing server. Finally, the method includes providing address translation data for the in-memory key-value store of the primary computing server from the network adapter of the primary computing server to the network adapter of the secondary computing server.
1. A method for remote direct memory access (RDMA) optimized high availability for in-memory storing of data, the method comprising:
receiving RDMA key-value store write requests in a network adapter of a primary computing server directed to writing data to an in-memory key-value store storing associative arrays of data of the primary computing server each associative array including a key associated with a single value;
performing RDMA write operations of the data by the network adapter of the primary computing server responsive to the RDMA key-value store write requests;
replicating the RDMA key-value store write requests to a network adapter of a secondary computing server, by the network adapter of the primary computing server;
providing from the network adapter of the primary computing server to the network adapter of the secondary computing server, address translation data indicating the address in the in-memory key-value store of the primary computing server at which the data is stored;
receiving an RDMA key-value store update request in the network adapter of the primary computing server directed to data stored in the in-memory key-value store of the primary computing server;
performing an RDMA key-value store update operation on the stored data by the network adapter of the primary computing server responsive to the RDMA key-value store update request;
replicating the RDMA key-value store update request to the network adapter of the secondary computing server, by the network adapter of the primary computing server;
translating addressing for the stored data in the in-memory key-value store of the primary computing server to an address in an in-memory key-value store of the secondary computing server utilizing the address translation data; and,
updating the stored data in the in-memory key-value store of the secondary server utilizing the translated addressing.
2. The method of claim 1 , further comprising:
receiving from a requesting client an RDMA key-value store read request in the network adapter of the secondary computing server in respect to data stored in the in-memory key-value store of the primary computing server;
translating an address for the data stored in the in-memory key-value store of the primary computing server to an address in an in-memory key-value store of the secondary computing server utilizing the address translation data;
performing an RDMA key-value store read operation at the translated address; and,
returning by the network adapter of the secondary computing server the data produced by the RDMA key-value store read operation to the requesting client.
3. The method of claim 2 , further comprising:
translating a local address table of the client based upon the address translation data; and,
forwarding all subsequent RDMA key-value store requests for data in the in-memory key-value store of the primary computing server to the network adapter of the secondary computing server utilizing the translated local address table.