{"id":{"repo_id":"mit","oai_identifier":"oai:dspace.mit.edu:1721.1/37095"},"canonical_url":"https://search.dev.ndltd.org/etd/mit/oai:dspace.mit.edu:1721.1/37095","repository":{"repo_id":"mit","name":"MIT","base_url":"https://dspace.mit.edu/oai/request"},"display":{"title":"Measuring the performance of a Distributed Quota Enforcement system for spam control","abstract":"In this thesis, I evaluate Distributed Quota Enforcement (DQE), a system for enforcing quotas on e-mail use as a spam control mechanism. I briefly describe the design and implementation of DQE, and then evaluate the enforcer's performance in several ways. My evaluation includes: the capacity of a single node; how the enforcer scales with added nodes; how well the enforcer tolerates faults; the relationship between the enforcer's size and time to respond (request latency); and the impact of globally distributing the enforcer's nodes. Salient features of the evaluation include: an enforcer composed to a few thousand high-end PCs can handle the world's current e-mail volume; the enforcer is resistant to failures: even with 20% of its nodes down, stamps are reused on average only 1.5 times; the main bottleneck in the enforcer's performance is disk seeks.","abstract_html":"In this thesis, I evaluate Distributed Quota Enforcement (DQE), a system for enforcing quotas on e-mail use as a spam control mechanism. I briefly describe the design and implementation of DQE, and then evaluate the enforcer's performance in several ways. My evaluation includes: the capacity of a single node; how the enforcer scales with added nodes; how well the enforcer tolerates faults; the relationship between the enforcer's size and time to respond (request latency); and the impact of globally distributing the enforcer's nodes. Salient features of the evaluation include: an enforcer composed to a few thousand high-end PCs can handle the world's current e-mail volume; the enforcer is resistant to failures: even with 20% of its nodes down, stamps are reused on average only 1.5 times; the main bottleneck in the enforcer's performance is disk seeks.","abstract_has_math":false,"creators":["Zamfirescu-Pereira, John Dalbert"],"institution":"Massachusetts Institute of Technology","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":"Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.","school":null,"contributors":[],"advisors":["Hari Balakrishnan."],"committee_chairs":[],"committee_members":[],"year":2006,"date_issued":"2006","date_published":"2006","updated_at":"2026-07-22T22:21:34Z","subjects":["Electrical Engineering and Computer Science."],"languages":["eng"],"rights":["M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission."],"rights_urls":["http://dspace.mit.edu/handle/1721.1/7582"],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/1721.1/37095","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Hari Balakrishnan."]},{"key":"dc:contributor.department","label":"Department","values":["Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science."]},{"key":"dc:contributor.other","label":"Dc Contributor Other","values":["Massachusetts Institute of Technology. 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I briefly describe the design and implementation of DQE, and then evaluate the enforcer's performance in several ways. My evaluation includes: the capacity of a single node; how the enforcer scales with added nodes; how well the enforcer tolerates faults; the relationship between the enforcer's size and time to respond (request latency); and the impact of globally distributing the enforcer's nodes. Salient features of the evaluation include: an enforcer composed to a few thousand high-end PCs can handle the world's current e-mail volume; the enforcer is resistant to failures: even with 20% of its nodes down, stamps are reused on average only 1.5 times; the main bottleneck in the enforcer's performance is disk seeks."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["M.Eng."]},{"key":"dc:title","label":"Title","values":["Measuring the performance of a Distributed Quota Enforcement system for spam control"]}]}],"canonical_facts":{"dc:contributor.advisor":["Hari Balakrishnan."],"dc:contributor.department":["Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science."],"dc:contributor.other":["Massachusetts Institute of Technology. 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