About: Fusion-io NVMFS

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SanDisk/Fusion-io's NVMFS file system, formerly known as Direct File System (DFS), accesses flash memory via a virtual flash storage layer instead of using the traditional block layer API. This file system has two main novel features. First, it lays out files directly in a very large virtual storage address space. Second, it leverages the virtual flash storage layer to perform block allocations and atomic updates. As a result, NVMFS performs better and is much simpler than a traditional Unix file system with similar functionalities. Additionally, this approach avoids the log-on-log performance issues triggered by log-structured file systems. Microbenchmark results show that NVMFS can deliver 94,000 I/O operations per second (IOPS) for direct reads and 71,000 IOPS for direct writes with the

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  • SanDisk/Fusion-io's NVMFS file system, formerly known as Direct File System (DFS), accesses flash memory via a virtual flash storage layer instead of using the traditional block layer API. This file system has two main novel features. First, it lays out files directly in a very large virtual storage address space. Second, it leverages the virtual flash storage layer to perform block allocations and atomic updates. As a result, NVMFS performs better and is much simpler than a traditional Unix file system with similar functionalities. Additionally, this approach avoids the log-on-log performance issues triggered by log-structured file systems. Microbenchmark results show that NVMFS can deliver 94,000 I/O operations per second (IOPS) for direct reads and 71,000 IOPS for direct writes with the virtualized flash storage layer on top of a first-generation Fusion-io ioDrive. For direct access performance, NVMFS is consistently better than ext3 on the same platform, sometimes by 20%. For buffered access performance, NVMFS is also consistently better than ext3, and sometimes by over 149%. Application benchmarks show that NVMFS outperforms ext3 by 7% to 250% while requiring less CPU power. Additionally, I/O latency is lower with NVMFS compared to ext3. (en)
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  • SanDisk/Fusion-io's NVMFS file system, formerly known as Direct File System (DFS), accesses flash memory via a virtual flash storage layer instead of using the traditional block layer API. This file system has two main novel features. First, it lays out files directly in a very large virtual storage address space. Second, it leverages the virtual flash storage layer to perform block allocations and atomic updates. As a result, NVMFS performs better and is much simpler than a traditional Unix file system with similar functionalities. Additionally, this approach avoids the log-on-log performance issues triggered by log-structured file systems. Microbenchmark results show that NVMFS can deliver 94,000 I/O operations per second (IOPS) for direct reads and 71,000 IOPS for direct writes with the (en)
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  • Fusion-io NVMFS (en)
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