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| Speaker: |
Professor A. L. Narasimha Reddy
Department of Electrical & Computer Engineering, Texas A&M University
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| Title: |
"Flexible Allocation and management of space in Storage Systems" |
| When: |
Thursday, May 1, 2008
10:30am - 12:00pm |
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Abstract:
Current file systems allocate storage statically at the time of their creation. This results in many suboptimal scenarios, for example: (a) space on the disk is not allocated well across multiple file systems, (b) data is not organized well for typical access patterns. We propose Virtual Allocation for flexible storage allocation. Virtual allocation separates storage allocation from the file system. It employs an allocate-on-write strategy, which lets applications fit into the actual usage of storage space without regard to the configured file system size. This improves flexibility by allowing storage space to be shared across different file systems. We present the design of virtual allocation and an evaluation of it through benchmarks based on a prototype system on Linux.
We describe two applications of Virtual Allocation. We consider (1) the problem of balancing locality and load in networked storage systems with multiple storage devices (or bricks) and (2) the problem of data distribution in heterogeneous devices such as flash and disk drives. We employ virtual allocation in designing user-optimal data migration in networked storage systems and in matching file characteristics to device characteristics. We will present results from Linux-based prototypes.
Bio:
Narasimha Reddy is currently a professor in the department of Electrical and Computer Engineering at Texas A & M University. During 1990-95, he was a research staff member at IBM Almaden Reserch Center. Reddy's research interests are in storage systems, computer networks and multimedia systems. Reddy receiveda Ph.D. from Univeristy of Illinois in 1990. He received an NSF Career award in 1996. One of his papers has been cited "for one of the most influential papers from the 1st ACM Multimedia Conference".
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| Location: |
IBM Austin Research Laboratory
Bldg 904, Floor 6, Room 6D-000
Austin, Texas |
| Contact: |
Gi-Joon Nam |
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