Elastic Quotas

Elastic quotas are a novel method of managing storage resources, which allows users to exceed their persistent quota while disk resources are available. When storage becomes scarce, the system automatically reclaims some storage based on pre-configured policies. Elastic quota policies are the core of the elastic quota system: they allow administrators and users to select the appropriate methods for reclaiming space. In this project we describe and evaluate various policies and provide insight into fairness, efficiency, gaming, and convenience from the perspectives of administrators and users. We have implemented a prototype of the elastic quota system in Linux, including a highly-configurable policy control system. Our evaluation of the system and shows it to have a low overhead while offering new and useful disk usage models.

Conference and Workshop Papers:

# Title (click for html version) Formats Published In Date Comments
1 Reducing Storage Management Costs via Informed User-Based Policies PS PDF BibTeX NASA/IEEE Conference on Mass Storage Systems and Technologies (MSST 2004) Apr 2004  

Technical Reports:
# Title (click for html version) Formats Published In Date Comments
1 Reducing Storage Management Costs via Informed User-Based Policies PS PDF BibTeX Stony Brook U. CS TechReport FSL-03-01 Mar 2003  
2 The Design and Implementation of Elastic Quotas: A System for Flexible File System Management PS PDF BibTeX Columbia U. CS TechReport CUCS-014-02 Jun 2002  

Past Students:

# Name (click for home page) Program Period Current Location
1 Charles P. Wright PhD May 2003 - May 2006 Partner, Senior Software Architect, Illumon (New York, NY)
2 Kiran-Kumar Muniswamy-Reddy MS Jan 2002 - May 2004 Consulting Member of Technical Staff, Oracle Corp (Seattle, WA)
3 Jeffrey R. Osborn BS/MS Jan 2001 - May 2003 Associate Director, Customer Intelligence, MRM//McCann (Birmingham, MI)
4 Charles P. Wright BS (Honors) Dec 2001 - May 2003 Application Software Developer, Walleye Software (New York, NY)
5 Ariye Shater BS Jan 2002 - May 2002 Vice President, Quantitative Analytics, Barclays Capital (New York, NY)

Sponsors:

# Sponsor Amount Period Type Title (click for award abstract)
1 HP/Intel $131,529 2002-2003 Sole PI Linux Application Performance and File System Security
2 HP/Intel $22,490 2001-2002 Sole PI Linux Network Scalability and File System Reliability