Systems and methods for achieving near zero impact during node failure in a cluster system

A node management method, comprising:

• receiving, by a client driver of a client device, cluster topology data from a leader node of a cluster system;
• routing, by the client driver of the client device, a client request to one of a plurality of nodes that are responsive based on the cluster topology data and management data of the cluster system;
• performing, by the client driver of the client device, a hashing function on a key contained in the client request to obtain a hash value;
• performing, by the client driver of the client device, a modulo function on the hash value to obtain a data slot value of the key using a total number of a plurality of data slots in the cluster system, the data slot value being a data slot value of one of the plurality of data slots in the cluster system, and the data slot value being associated with the one of the plurality of nodes that are responsive;
• and
• routing, by the client driver of the client device, the client request to the one of the plurality of nodes further based on the data slot value and by knowing the plurality of data slots allocated to each of the plurality of nodes in the cluster system and the total number of the plurality of data slots in the cluster system.

A non-transitory computer-accessible medium comprising instructions for execution by a processor, wherein, upon execution of the instructions, the processor is configured to perform procedures comprising:

• routing, by a client driver of a client device, a client request to one of a plurality of nodes that are responsive based on cluster topology data and management data of a cluster system, wherein the cluster topology data includes an address of each of the plurality of nodes in the cluster system;
• performing, by the client driver of the client device, a hashing function on a key contained in the client request to obtain a hash value;
• performing, by the client driver of the client device, a modulo function on the hash value to obtain a data slot value of the key using a total number of a plurality of data slots in the cluster system, the data slot value being a data slot value of one of the plurality of data slots in the cluster system, and the data slot value being associated with the one of the plurality of nodes that are responsive;
• and
• routing, by the client driver of the client device, the client request to the one of the plurality of nodes further based on the data slot value and by knowing the plurality of data slots allocated to each of the plurality of nodes in the cluster system and the total number of the plurality of data slots in the cluster system.