15. An apparatus as claimed in claim 1 , wherein the apparatus comprises or is part of a server.
1. An apparatus, comprising: a processor configured to receive tokens and to provide the tokens to a plurality of different pools, wherein each of the plurality of different pools is associated with a different server, and wherein one pool of the plurality of different pools is configured to hold M tokens, and remove tokens from said plurality of different pools, wherein said processor is configured such that, when it is determined that a server request is of a type that requires at least one token to be removed from said one pool for said server request to be handled, and that said server request requires a determined number of tokens to be removed from said one pool for said server request to be handled, then said server request is handled when said one pool contains said determined number of tokens for said request and said determined number of tokens is removed when said server request is handled by the server with which said one pool is associated.