Method and system for balancing and optimizing primary placement group, and device and medium

A method for balancing and optimizing a primary placement group, applied to a computer device, the computer device comprising at least one processor and a memory, the memory being used to store computer instructions that are executable on the processor, the computer instructions, when executed by the processor, implementing the method, the method comprising:

• determining a theoretical average value according to a total capacity of one or more cache disks and a total number of object-based storage devices, wherein capacity is M, the total number is N, the object-based storage devices comprise N object-based storage devices which are all mechanical disks, and the theoretical average value is used to indicate cache capacity occupied by each mechanical disk with caches, N is an integer greater than 1, M is greater than 0;
• determining a weight corresponding to a current object-based storage device of the N object-based storage devices based on an actual capacity occupied by the current object-based storage device and the theoretical average value;
• obtaining a total number of current primary placement groups, and determining the number of expected balanced primary placement groups based on the total number of the current primary placement groups and the weight corresponding to the current object-based storage device;
• reading an address of a current placement group placed in the current object-based storage device, obtaining a corresponding base value based on the address of the current placement group and an address of the current object-based storage device, and determining the current placement group placed in the current object-based storage device as a primary placement group in a case where the base value is less than a preset value;
• and
• repeating a previous operation until the number of the determined primary placement groups in the current object-based storage device reaches the number of the expected balanced primary placement groups;
• wherein the obtaining a corresponding base value based on the address of the current placement group and an address of the current of object-based storage device comprises,
• calculating a first value from the address of the current placement group and the address of the current object-based storage device by using a Hash algorithm, and obtaining highest sixteen bits of the first value as the corresponding base value.