Dr. Carlos Maltzahn is an Adjunct Assistant Professor of Computer Science and the Executive Director of the UCSC/LANL Institute for Scalable Scientific Data Management. He joined the SSRC in January 2005 after five years at Netapp where he worked in the performance engineering group. His current research interests include scalable file system data and metadata management (especially for storage class memories), storage qos, very long-term preservation, network intermediaries (especially prediction and grouping), applied machine learning, information retrieval, and cooperation dynamics.

Publications

2008

• Sasha Ames, Carlos Maltzahn, Ethan L. Miller, QUASAR: Interaction with File Systems Using a Query and Naming Language, Technical Report UCSC-SSRC-08-03, September 2008. [Distributed Metadata Management]

2007

• Sage Weil, Andrew Leung, Scott A. Brandt, Carlos Maltzahn, RADOS: A Fast, Scalable, and Reliable Storage Service for Petabyte-scale Storage Clusters, Proceedings of the ACM Petascale Data Storage Workshop 2007 (PDSW 07), November 2007. [Petabyte-Scale Object-Based Storage]
• David Bigelow, Suresh Iyer, Tim Kaldewey, Roberto Pineiro, Anna Povzner, Scott A. Brandt, Richard Golding, Theodore Wong, Carlos Maltzahn, End-to-end Performance Management for Scalable Distributed Storage, Proceedings of the ACM Petascale Data Storage Workshop 2007 (PDSW 2007), November 2007. [Storage QoS]
• Jonathan Koren, Yi Zhang, Sasha Ames, Andrew Leung, Carlos Maltzahn, Ethan L. Miller, Searching and Navigating Petabyte Scale File Systems Based on Facets, Proceedings of the 2007 ACM Petascale Data Storage Workshop (PDSW 07), November 2007. [Distributed Metadata Management]
• Andrew Leung, Eric Lalonde, Jacob Telleen, James Davis, Carlos Maltzahn, Using Comprehensive Analysis for Performance Debugging in Distributed Storage Systems, Proceedings of the 24th IEEE Conference on Mass Storage Systems and Technologies (MSST 2007), September 2007, pages 281-286. [Petabyte-Scale Object-Based Storage]
• Andrew Leung, Eric Lalonde, Jacob Telleen, James Davis, Carlos Maltzahn, Using Comprehensive Analysis for Performance Debugging in Distributed Storage Systems, Technical Report UCSC-SSRC-07-05, May 2007. Later version published in MSST 2007. [Petabyte-Scale Object-Based Storage]
• Carlos Maltzahn, Nikhil Bobb, Mark W. Storer, Damian Eads, Scott A. Brandt, Ethan L. Miller, Graffiti: A Framework for Testing Collaborative Distributed Metadata, Proceedings in Informatics 21, March 2007, pages 97–111. [Distributed Metadata Management] [Storage Class Memories]

2006

• Sage Weil, Scott A. Brandt, Ethan L. Miller, Carlos Maltzahn, CRUSH: Controlled, Scalable, Decentralized Placement of Replicated Data, Proceedings of SC '06, November 2006. [Petabyte-Scale Object-Based Storage]
• Sage Weil, Scott A. Brandt, Ethan L. Miller, Darrell D. E. Long, Carlos Maltzahn, Ceph: A Scalable, High-Performance Distributed File System, Proceedings of the 7th Conference on Operating Systems Design and Implementation (OSDI '06), November 2006. [Petabyte-Scale Object-Based Storage]
• Sasha Ames, Nikhil Bobb, Kevin Greenan, Owen Hofmann, Mark W. Storer, Carlos Maltzahn, Ethan L. Miller, Scott A. Brandt, LiFS: An attribute-rich file system for storage class memories, Proceedings of the 23rd IEEE / 14th NASA Goddard Conference on Mass Storage Systems and Technologies, May 2006. [Storage Class Memories]
• Sage Weil, Feng Wang, Qin Xin, Scott A. Brandt, Ethan L. Miller, Darrell D. E. Long, Carlos Maltzahn, Ceph: A Scalable Object-Based Storage System, Technical Report UCSC-SSRC-06-01, March 2006. [Petabyte-Scale Object-Based Storage]
• Nikhil Bobb, Damian Eads, Mark W. Storer, Scott A. Brandt, Carlos Maltzahn, Ethan L. Miller, Graffiti: A framework for testing collaborative distributed metadata, Proceedings of the 7th International Workshop on Distributed Data and Structures (WDAS 2006), January 2006. [Storage Class Memories]

2005

• Mark W. Storer, Kevin Greenan, Ethan L. Miller, Carlos Maltzahn, POTSHARDS: Storing Data for the Long-Term Without Encryption, Proceedings of the 3rd International IEEE Security in Storage Workshop, December 2005. [Archival Storage] [Secure File and Storage Systems]
• Sasha Ames, Nikhil Bobb, Scott A. Brandt, Adam Hiatt, Carlos Maltzahn, Ethan L. Miller, Alisa Neeman, Deepa Tuteja, Richer file system metadata using links and attributes, Proceedings of the 22nd IEEE / 13th NASA Goddard Conference on Mass Storage Systems and Technologies, April 2005. [Storage Class Memories]

1999

• Carlos Maltzahn, Kathy Richardson, Dirk Grunwald, Reducing the Disk I/O of Web Proxy Server Caches, USENIX Annual Technical Conference, June 1999. [Prediction and Grouping]
• Carlos Maltzahn, Kathy Richardson, Dirk Grunwald, James Martin, On Bandwidth Smoothing, 4th International Web Caching Workshop (WCW'99), March 1999. [Prediction and Grouping]

1997

• Carlos Maltzahn, Kathy Richardson, Dirk Grunwald, Performance Issues of Enterprise Level Web Proxies, 1997 ACM SIGMETRICS International Conference on Measurement and Modeling of Computer Systems, June 1997. [Storage QoS]