Suballocation Schemes
Block suballocation addresses this problem by dividing up a tail block in some way to allow it to store fragments from other files.
Some block suballocation schemes can perform allocation at the byte level; most, however, simply divide up the block into smaller ones (the divisor usually being some power of 2). For example, if a 38 KiB file is to be stored in a file system using 32 KiB blocks, the file would normally span two blocks, or 64 KiB, for storage; the remaining 26 KiB of the second block becomes unused slack space. With a 8 KiB block suballocation, however, the file would occupy just 6 KiB of the second block, leave 2 KiB (of the 8 KIB suballocation block) slack and free the other 24 KiB of the block for other files.
Read more about this topic: Block Suballocation
Famous quotes containing the word schemes:
“Science is a dynamic undertaking directed to lowering the degree of the empiricism involved in solving problems; or, if you prefer, science is a process of fabricating a web of interconnected concepts and conceptual schemes arising from experiments and observations and fruitful of further experiments and observations.”
—James Conant (1893–1978)