17. A method, comprising: determining, by a processor, that a server request is of a type that requires at least one token to be removed from a token pool for said server request to be handled; determining, by the processor, that said server request requires a predetermined number of tokens to be removed from said token pool for said server request to be handled; and handling, by the processor, said server request when said token pool contains said predetermined number of tokens for said request by removing said predetermined number of tokens when said server request is handled by a server with which said token pool is associated, wherein the processor is configured to receive tokens and to provide the tokens to, and remove tokens from a plurality of different pools that include said token pool, wherein each of the plurality of different pools is associated with a different server, and wherein the token pool is configured to hold M tokens.
17. A method, comprising: determining, by a processor, that a server request is of a type that requires at least one token to be removed from a token pool for said server request to be handled; determining, by the processor, that said server request requires a predetermined number of tokens to be removed from said token pool for said server request to be handled; and handling, by the processor, said server request when said token pool contains said predetermined number of tokens for said request by removing said predetermined number of tokens when said server request is handled by a server with which said token pool is associated, wherein the processor is configured to receive tokens and to provide the tokens to, and remove tokens from a plurality of different pools that include said token pool, wherein each of the plurality of different pools is associated with a different server, and wherein the token pool is configured to hold M tokens. 20. A method as claimed in claim 17 , comprising receiving, by the processor, a predetermined number of tokens and providing, by the processor, the predetermined number of tokens during a first period to said token pool.