The application relates to the storage technical field and discloses a
dynamic capacity expansion or reduction method, device, equipment and medium. The method comprises the following steps: collecting load information of a
server processing data, comparing the load information with a preset load degree, obtaining a first comparison result, counting the first comparison result, obtaining a count value, comparing the count value with a preset number value, obtaining a second comparison result, sending a capacity expansion or reduction instruction to a preset
cloud server according to the second comparison result and a preset configuration file, obtaining
server information corresponding to capacity expansion or reduction, receiving the
server information corresponding to capacity expansion or reduction, and configuring corresponding servers to balance the load, so that the load of the host server can be maintained in a balanced state, the operation and maintenance cost is reduced, and the operation and maintenance efficiency is improved.