Stochastic service guarantees for continuous data on multi-zone disks
PODS '97 Proceedings of the sixteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Using System-Level Models to Evaluate I/O Subsystem Designs
IEEE Transactions on Computers
Data Logging: A Method for Efficient Data Updates in Constantly Active RAIDs
ICDE '98 Proceedings of the Fourteenth International Conference on Data Engineering
A performance comparison of RAID-5 and log-structured arrays
HPDC '95 Proceedings of the 4th IEEE International Symposium on High Performance Distributed Computing
Zone-Bit-Recording-Enhanced Video Data Layout Strategies
MASCOTS '96 Proceedings of the 4th International Workshop on Modeling, Analysis, and Simulation of Computer and Telecommunications Systems
PROFS-Performance-Oriented Data Reorganization for Log-Structured File System on Multi-Zone Disks
MASCOTS '01 Proceedings of the Ninth International Symposium in Modeling, Analysis and Simulation of Computer and Telecommunication Systems
Observing the effects of multi-zone disks
ATEC '97 Proceedings of the annual conference on USENIX Annual Technical Conference
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Traditional RAID has the characteristics that location of stripe unit in each disk is stochastic and static, and that the outer zone of the disk has higher data transfer rate as compared to the inner one. Facing this situation, to exploit RAID I/O performance fully, this paper proposes a new algorithm PMSH (Placement and Migration based on Stripe unit Heat) for RAID stripe unit data to be placed optically and migrated dynamically. Based on the heat of RAID stripe unit, PMSH keeps migrating the frequently accessed stripe unit to the disk zone with higher data transfer rate to optimize the location of data in RAID disks and make the data distribution adapt to the evolution of file access pattern dynamically as well. Simulation results demonstrate significant RAID I/O performance improvement using PMSH.