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UFFS 1.1.0

  Date Added: May 10, 2013  |  Visits: 291


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UFFS is an ultra low cost flash file system for embedded system.<br /><br />UFFS is a NAND flash file system designed for embedded system, it performs some unique and advanced features:<br /><br />Low cost:<br /><br />For NAND flash with 512 page size:<br />NAND flash | Total Blocks | Buffers/Caches | Total RAM cost<br /><br />128M | 8192 | 40/30 | 164K<br />32M | 2048 | 40/30 | 68K<br />16M | 1024 | 10/10 | 26K<br /><br />Tree Nodes: 16 * toatl_blocks<br /><br />Page Buffers: page_size(512) * buffers (10 ~ pages_per_block)<br />Block info caches: (14 * pages_per_block) * block_info_caches ( 5 ~ 20)<br /><br />Total Memory usage = Tree Nodes + Page Buffers + Block info caches + Others(1~2K)<br /><br />For NAND flash with 2K page size:<br /><br />NAND flash | Total Blocks | Buffers/Caches | Total RAM cost<br /><br />512M | 8192 | 40/30 | 180K<br />128M | 512 | 40/30 | 70K<br /><br />Tree Nodes: 16 * toatl_blocks<br /><br />Page Buffers: page_size(2048) * buffers (10 ~ pages_per_block)<br /><br />Block info caches: (14 * pages_per_block) * block_info_caches ( 5 ~ 20)<br /><br />Total Memory usage = Tree Nodes + Page Buffers + Block info caches + Others(1~2K)<br /><br />Fast booting<br /><br />UFFS read only one spare area for each NAND flash block to build up the in-memory nodes tree. Typically, UFFS needs less then 1 second to mount a full loaded 128 Mbytes NAND flash.<br /><br />Superb Reliability<br /><br />Guaranteed integrity across unexpected power losses.<br /><br />Bad-block tolerant, ECC enable and ware-leveling<br /><br />Nothing new for flash file system, but UFFS implements these in a simple yet effective way.<br /><br />No garbage collection needed for UFFS<br /><br />UFFS collect the 'dirty blocks' on the fly, no garbage collection needed.<br /><br />Support direct flash interface, no operating system needed<br /><br />UFFS can be build on top of direct flash interface,easy to port to any embedded system.<br /><br />Fully tested<br /><br />UFFS is fully tested on PC (via UFFS PC emulator). Moreover, UFFS is not just 'proof-of-concept' but has been successfully used in real world product for tens of thousands of copies.<br /><br />What UFFS "IS", "IS NOT" ?<br /><br />UFFS is not a Linux kernel module.<br />UFFS is not running in a separated thread rather tha

Requirements: No special requirements
Platforms: Windows, Mac, *nix, Mac OSX, Linux, C/C++ , BSD Solaris
Keyword: Development Tool File Flash Nand Nand Flash File Real Time System
Users rating: 0/10

License: Freeware
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