Aqueduct: Online Data Migration with Performance Guarantees
FAST '02 Proceedings of the Conference on File and Storage Technologies
Hippodrome: Running Circles Around Storage Administration
FAST '02 Proceedings of the Conference on File and Storage Technologies
Traveling to Rome: QoS Specifications for Automated Storage System Management
IWQoS '01 Proceedings of the 9th International Workshop on Quality of Service
Data partitioning and load balancing in parallel disk systems
The VLDB Journal — The International Journal on Very Large Data Bases
EPYFQ: a novel scheduling algorithm for performance virtualization in shared storage environment
Proceedings of the 5th international workshop on Software and performance
Awarded Best Student Paper! -- A Framework for Building Unobtrusive Disk Maintenance Applications
FAST '04 Proceedings of the 3rd USENIX Conference on File and Storage Technologies
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In this paper, we present a novel approach of online virtual disk migration with performance guarantees, which is important for storage maintenance tasks. Our approach can be applied to moving virtual disk and exchanging virtual disks. It identifies the surplus I/O resource of storage pools after satisfying performance requirement of virtual disks with EPYFQ scheduling algorithm, and gives high priority of using these I/O resource to migration tasks. Thus, the performance of virtual disks is guaranteed during migration, and the migration is completed in the shortest possible time. Moreover, our approach divides migration task into multiple storage transactions, which can protect the consistency of the data in the migrated virtual disks when application I/O and migration I/O execute concurrently. We implement our approach into E-DM, a kernel module of Linux, and evaluate it. The result shows that the IOPS of virtual disks is decreased not more than 3% during migration.