Data replication method, apparatus, and system

An electronic device, comprising:

• a memory configured to store a program;
• and
• a processor coupled to the memory and configured to execute the program to cause the electronic device to:
• obtain a usage status comprising a ratio of a data amount of incoming data at a first device and a bandwidth for replication between the first device and a second device wherein a replication manner to replicate data from the first device to the second device is based on the usage status and a preset threshold;
• take a snapshot for the first device from the second device and replicating the data to the second device according to the snapshot when the ratio is less than the preset threshold;
• and
• replicate, according to a storage address of the data that is located in the first device, the data from the first device to the second device without a snapshot operation when the ratio is not less than the preset threshold and take no snapshot for the first device until the ratio decreases to be less than the preset threshold.

A storage system, comprising:

• a second device;
• and
• a first device communicatively coupled to the second device and configured to:
• obtain a usage status comprising a ratio of a data amount of incoming data at the first device and a bandwidth for replication between the first device and the second device wherein a replication manner to replicate data from the first device to the second device is based on the usage status and a preset threshold;
• and
• replicate, according to a storage address of the data that is located in the first device, the data from the first device to the second device without a snapshot operation when the ratio is not less than the preset threshold and take no snapshot for the first device until the ratio decreases to be less than the preset threshold.