On distributed file tree walk of parallel file systems
On distributed file tree walk of parallel file systems
复制标题
并行文件系统的分布式文件树遍历
DOI:
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发表时间:
2012
期刊:
影响因子:
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通讯作者:
John R. Bringhurst
中科院分区:
文献类型:
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作者:
Jharrod Lafon;S. Misra;John R. Bringhurst
Supercomputers generate vast amounts of data, typically organized into large directory hierarchies on parallel file systems. While the supercomputing applications are parallel, the tools used to process them requiring complete directory traversais, are typically serial. We present an algorithm framework and three fully distributed algorithms for traversing large parallel file systems, and performing file operations in parallel. The first algorithm introduces a randomized work-stealing scheduler; the second improves the first with proximity-awareness; and the third improves upon the second by using a hybrid approach. We have tested our implementation on Cielo, a 1.37 petaflop supercomputer at the Los Alamos National Laboratory and its 7 petabyte file system. Test results show that our algorithms execute orders of magnitude faster than state-of-the-art algorithms while achieving ideal load balancing and low communication cost. We present performance insights from the use of our algorithms in production systems at LANL, performing daily file system operations.