By reducing the file system fragmentation, FBA decrease the write overhead caused by the merger. Along with space allocation delay and write-delay optimization of hidden delay technology, random-write performance of file system is enhanced a lot. FBA减少了文件系统碎片,从而降低写操作引起的合并开销,再加上延迟隐藏技术中对空间延迟分配和延迟写的优化和改进,提高了文件系统的随机写性能。