ACM Transactions on Computer Systems (TOCS)
Reimplementing the Cedar file system using logging and group commit
SOSP '87 Proceedings of the eleventh ACM Symposium on Operating systems principles
A case for redundant arrays of inexpensive disks (RAID)
SIGMOD '88 Proceedings of the 1988 ACM SIGMOD international conference on Management of data
The design and implementation of a log-structured file system
ACM Transactions on Computer Systems (TOCS)
Falling off the cliff: when systems go nonlinear
HOTOS'05 Proceedings of the 10th conference on Hot Topics in Operating Systems - Volume 10
Parallax: virtual disks for virtual machines
Proceedings of the 3rd ACM SIGOPS/EuroSys European Conference on Computer Systems 2008
Extensible block-level storage virtualization in cluster-based systems
Journal of Parallel and Distributed Computing
Hierarchical file systems are dead
HotOS'09 Proceedings of the 12th conference on Hot topics in operating systems
HotStorage'10 Proceedings of the 2nd USENIX conference on Hot topics in storage and file systems
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File systems were originally designed for hosts with only one disk. Over the past 20 years, a number of increasingly complicated changes have optimized the performance of file systems on a single disk. Over the same time, storage systems have advanced on their own, separated from file systems by the narrow block interface. Storage systems have increasingly employed parallelism and virtualization. Parallelism seeks to increase throughput and strengthen fault-tolerance. Virtualization employs additional levels of data addressing indirection to improve system flexibility and lower administration costs. Do the optimizations of file systems make sense for current storage systems? In this paper, I show that the performance of a current advanced local file system is sensitive to the virtualization parameters of its storage system. Sometimes random block layout outperforms smart file system layout. In addition, random block layout stabilizes performance across several virtualization parameters. This approach has the advantage of immunizing file systems to changes in their underlying storage systems.