Resource affinity in a dynamic resource pool

An apparatus comprising:

• one or more computer readable storage media;
• a predefined list of numbers stored on at least one of the one or more computer readable storage media;
• and
• program instructions stored on at least one of the one or more computer readable media that, when executed by a processing system, direct the processing system to:
• receive a request for access to content, the content being stored in a distributed or cloud computing environment on an associated server resource of a changing group of server resources, the changing of the changing group of server resources occurring through adding or removing one or more server resources to or from the changing group;
• map the request to the associated server resource, the map comprising:
• calculating a modulus on a request identifier with at least a first number in the predefined list of numbers to generate a resource identifier identifying the associated server resource, wherein each modulus result is a resource identifier that identifies possible server resources in the changing group, wherein at least one of the possible server resources is possible to be the associated server resource;
• and
• communicating with the associated server resource corresponding to the resource identifier.

A resource locator comprising:

• one or more computer readable storage media;
• a predefined list of numbers stored on at least one of the one or more computer readable storage media, the predefined list of numbers comprising a plurality of prime numbers;
• and
• program instructions stored on at least one of the one or more computer readable storage media that, when executed by a processing system, direct the processing system to:
• receive requests for access to content, the content being stored in a distributed or cloud computing environment on associated server resources of a changing group of server resources, the changing of the changing group of server resources occurring through adding or removing one or more server resources to or from the changing group;
• map the requests to the associated server resources, wherein for each request, the program instructions direct the processing system to:
• obtain a numeric identifier (x) from the request;
• retrieve at least a first number (n) in the predefined list of numbers;
• calculate x mod n to generate a resource identifier, the resource identifier being the modulus result of x mod n;
• determine whether the resource identifier identifies an available associated server resource or an unavailable associated server resource;
• and
• in response to a determination that the resource identifier identifies the available associated server resource, communicate the request to the available associated server resource;
• in response to a determination that the resource identifier identifies the unavailable associated server resource, traverse the predefined list of numbers to retrieve a next number (m), calculate x mod m, and determine whether a resulting resource identifier identifies the available server associated resource or the unavailable associated server resource until the resource identifier identifies the available associated server resource.