Patent ID: 11863520
Assignee: ALIBABA GROUP HOLDING LIMITED
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A data access method, wherein the method comprises:
receiving, by a Remote Direct Memory Address (RDMA) control service, an address assignment request sent by an instance control service based on a first instance;
assigning, by a Remote Direct Memory Address (RDMA) control service, an address segment to the first instance based on user information and a corresponding connection relationship between a switch and the first instance defined by a user;
building, by the RDMA control service, an access control list based on the address segment assigned to the first instance, wherein the access control list is used for controlling access between different first instances defined by the user;
sending, by the RDMA control service, the access control list to a switch control service, such that the switch control service configures the access control list for the switch;
returning, by the RDMA control service, the address segment to the instance control service, such that the instance control service starts the first instance;
receiving, by the RDMA control service, a multicast packet carrying information about a network port of a second instance that is sent by the second instance through the network port, wherein the receiving is before the assigning of an address segment to the first instance;
sending, by the RDMA control service, a query request to a machine deployment control service based on the information about the network port that is carried in the multicast packet, to query for deployment information of the second instance; and
receiving, by the RDMA control service, the deployment information returned by the machine deployment control service based on the query request, and determining a corresponding connection relationship between the second instance and the switch based on the deployment information.