An improved mechanism for efficiently polling file descriptors in a large scale computer system is disclosed. The heat sink has a base, and a plurality of fins extending from the base. In one embodiment, the methods include advertising the first set of LsBs by transmitting a first advertisement message that includes the start indexes, ranges of SIDs, and sub-block numbers of all LsBs of the first set of LsBs. The slag additive section is configured to feed a slag additive mixture into the gasifier and to substantially control the total water content within the gasification system.