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Resume (.pdf)
Ph.D in Computer Science, expected in Spring 2005 Advisor: Scott A. Brandt M.S. in Computer Science, June 2002 Advisor: Scott A. Brandt B.S in Computer Science, June 2000
Storage System Research Center, Dept. of Computer Science, UCSC Advisor: Scott A. Brandt July 2001 -- Present Object-Based Storage Devices (OBSDs or OSDs) are network-attached devices that presents an interface of arbitrarily-named data objects of variable sizes. Distributed file systems building on OBSDs are expected to achieve better scalability, reliability, and security. It is important to efficiently manage OBSD storage space, exploit object interface, and fully integrate OBSDs into distributed storage systems.
-- Studied file system workload characterization for large distributed file systems. -- Characterize the object-level workload; on-going work. -- Design OBSD protocols; on-going work. -- Integrate OBSDs into large distributed storage systems; on-going work.
-- Studied file system performance by using MEMS-based storage devices as metadata storage. -- Optimized the file data layout through exploiting the internal parallalism of MEMS-based storage devices. HP NonStop Laboratory, Cupertino CA Mentor: Pankaj Mehra and Sam Fineberg June 2004 -- August 2004 The Apsara Persistent Memory (PM) system targets Online Data Store (ODS) to provide a fast non-volatile storage. By employing RDMA-enabled networks, the PM system can offer extremely high bandwidth and low latency while guarantee data durable. More important, it provides a durable address space, which can fundamentally change the persistent architecture used in most online data stores. My job is to design and implement the PM system over InfiniBand. The prototype of the PM system has passed the laboratory testing. Sandia National Laboratory, Livermore, CA Mentor: Dov Cohen July 2003 -- September 2003 Understanding file system access patterns is critical for performance optimization in distributed file systems. While it is relatively hard to make file system kernel adapting to different applications, applications could easily benefit a lot by shifting to the file system preferred patterns. My task included developing a file system tracing toolkit for Linux clusters, analyzing file system access patterns and storage system bandwidth utilization, and optimizing them at the application level.
Teaching assistant for CS111, {\em Introduction to Operating Systems}. Teaching assistant for CS002, {\em Introduction to Computer Science}.
Summer Intern, Cupertino, CA, June 2004 -- August 2004 I implemented the Apsara Persistent Memory System over InfiniBand. Summer Intern, Livermore, CA, July 2003 -- Sept. 2003 I designed and implemented a file system tracing toolkit for Linux cluster. China, Summer Intern, Hefei, China, June 1999 -- Sept. 1999 I worked on the project of building fortran compiler for parallel applications in the DAWN 2000 parallel architecture. My task was to develop underlying packages for the parallel debugger that synchronizes data communication between different nodes.
OBFS is specially designed for Object-Based Storage Devices (OBSDs). It optimizes the disk layout to maximize the data object throughput. The user-space OBFS is developed in Linux. The kernel version of OBFS is under development. MEMS Architecture Simulator can be used to simulate MEMS write buffer, MEMS Virtual Disk, and MEMS metadata storage. It has been integrated into the DiskSim package. Object Workload Simulator simulates the activities between the OBSD clusters and clients in large object-based storage systems. Besides being used to characterize of object workloads, it can also be used to examine various protocols among object-based storage systems. The Apsara Persistent Memory System enables user to use network attached persistent memory devices through high performance switch networks. It is developed under HPUX on Itanium 2 platforms. File System Tracing Toolkit is developed to capture the file-system-related system calls in Linux clusters. This toolkit is integrated into Linux kernel 2.4.20.
scott AT cs.ucsc.edu, (831) 459-5042 Computer Science Department Jack Baskin School of Engineering University of California Santa Cruz, CA 95064 elm AT cs.ucsc.edu, (831) 459-1222 Computer Science Department Jack Baskin School of Engineering University of California Santa Cruz, CA 95064 darrell AT cs.ucsc.edu, (831) 459-2616 Computer Science Department Jack Baskin School of Engineering University of California Santa Cruz, CA 95064 pankaj.mehra AT hp.com, (408) 285-1823 19333 vallco pkwy, MS 4402 Cupertino, CA 95014
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