 memory efficiency memory efficiency admin 6 july 2012 1023am fasortamountasc yaffs has a lower memory footprint than most other logstructured flash file systems because it is logstructured ram is required to build up runtime data structures for acceptable performance as a rule of thumb yaffs uses approximately 2 bytes per chunk of nand flash where a chunk is typically one page of nand for nand with 512byte pages a budget of approximately 4kbytes of ram per 1mbyte of nand is usually sensible and for 2kbyte page devices a budget of approximately 1kbyte per 1mbyte of nand usually suffices you can find out details of yaffs memory use in the document  http wwwyaffsnet documents howyaffsworks 