News & Events

Department Events & Announcements

Events

• Apr

  12

  CS Seminar: Designing efficient and scalable cache management systems (Juncheng Yang)

  Department of Computer Science (CS)

  12:00 PM 3514, Mudd Hall ( formerly Seeley G. Mudd Library)

  EVENT DETAILS

  Friday / CS Seminar
  April 12th / 12:00 PM
  In Person / Mudd 3514

  Speaker
  Juncheng Yang, Carnegie Mellon University

  Talk Title
  Designing efficient and scalable cache management systems

  Abstract
  Software-managed caches have been ubiquitously deployed in today's system infrastructure. From personal devices to servers on the edge and the cloud, these caches speed up data access, reduce data movement, and avoid repeated computation. However, they consume a huge amount of resources, i.e., DRAM and CPUs.
  
  In this talk, I will discuss how to design efficient and scalable cache systems. In the first part, I will demonstrate that the efficiency of a key-value cache is not only determined by the eviction algorithm but also by other components, e.g., storage layout and expiration design. I will then describe how I designed Segcache to reduce memory footprint by up to 60% and increase throughput by 8x compared to state-of-the-art systems. Segcache has been adopted for production at Twitter and Momento.
  In the second part, I will introduce a surprising new finding from our largest-scale eviction algorithm study: FIFO queues are all we need for cache eviction. I will then describe S3-FIFO, a new cache eviction algorithm that is simpler, more scalable, and more efficient than state-of-the-art algorithms. S3-FIFO has been adopted for production at Google, VMWare, Redpanda, and several others.
  Finally, I will describe my future work on building efficient, performant, and robust data systems.

  Biography
  Juncheng Yang (https://junchengyang.com) is a 6th-year Ph.D. student in the Computer Science Department at Carnegie Mellon University. His research interests broadly cover the efficiency, performance, reliability, and sustainability of large-scale data systems.
  
  Juncheng's works have received best paper awards at NSDI'21, SOSP'21, and SYSTOR'16. His OSDI'20 paper was recognized as one of the best storage papers at the conference and invited to ACM TOS'21. Juncheng received a Facebook Ph.D. Fellowship in 2020, was recognized as a Rising Star in machine learning and systems in 2023, and a Google Cloud Research Innovator in 2023.

  His work, Segcache, has been adopted for production at Twitter and Momento. The two eviction algorithms he designed (S3-FIFO, SIEVE) have been adopted for production at Google, VMware, Cloudflare, Redpanda, and many others with over 20 open-source libraries available on GitHub. Moreover, the open-source cache simulation library he created, libCacheSim, has been used by almost 100 research institutes and companies.

  Research Area/Interests
  Computer systems

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  TIME Friday, April 12, 2024 at 12:00 PM - 1:00 PM

  LOCATION 3514, Mudd Hall ( formerly Seeley G. Mudd Library)    map it

  ADD TO CALENDAR

  CONTACT Wynante R Charles    wynante.charles@northwestern.edu EMAIL

  CALENDAR Department of Computer Science (CS)

• Aug

  14

  Undergraduate Quantum Summer School

  McCormick School of Engineering and Applied Science

  All Day Ford Motor Company Engineering Design Center

  EVENT DETAILSmore info

  Innovation in Quantum Pedagogy, Application, and its Relation to Culture (IQ-PARC), funded by the Department of Defense — National Defense Education Program, is extending an invitation to underrepresented students nationwide (including military-connected students) to participate in a summer school focused on quantum technologies, to be held at Northwestern University. Join us for presentations by faculty and industry partners introducing quantum technologies, cutting-edge research areas, and related job opportunities particularly in the areas of national security.

  This effort aims to foster an inclusive environment that encourages participation from all corners of the academic community. Successful applicants will receive up to $1,000 USD to cover travel and lodging expenses in Evanston, IL.

  Priority application deadline: May 15, 2024.

  Decisions will be sent by June 15, 2024.

  Register Now

  more less

  TIME Wednesday, August 14, 2024

  LOCATION Ford Motor Company Engineering Design Center    map it

  ADD TO CALENDAR

  CONTACT Dongyang Li    lidongyang@northwestern.edu EMAIL

  CALENDAR McCormick School of Engineering and Applied Science

• Aug

  15

  Undergraduate Quantum Summer School

  McCormick School of Engineering and Applied Science

  All Day Ford Motor Company Engineering Design Center

  EVENT DETAILSmore info

  Innovation in Quantum Pedagogy, Application, and its Relation to Culture (IQ-PARC), funded by the Department of Defense — National Defense Education Program, is extending an invitation to underrepresented students nationwide (including military-connected students) to participate in a summer school focused on quantum technologies, to be held at Northwestern University. Join us for presentations by faculty and industry partners introducing quantum technologies, cutting-edge research areas, and related job opportunities particularly in the areas of national security.

  This effort aims to foster an inclusive environment that encourages participation from all corners of the academic community. Successful applicants will receive up to $1,000 USD to cover travel and lodging expenses in Evanston, IL.

  Priority application deadline: May 15, 2024.

  Decisions will be sent by June 15, 2024.

  Register Now

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  TIME Thursday, August 15, 2024

  LOCATION Ford Motor Company Engineering Design Center    map it

  ADD TO CALENDAR

  CONTACT Dongyang Li    lidongyang@northwestern.edu EMAIL

  CALENDAR McCormick School of Engineering and Applied Science

• Sep

  16

  Computer Science Incoming MS Placement Exam

  Department of Computer Science (CS)

  All Day

  EVENT DETAILS

  *Applicable to new MS students. Does not apply to BSMS and BAMS students.

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  TIME Monday, September 16, 2024

  ADD TO CALENDAR

  CONTACT MS Student Help    ms-help@cs.northwestern.edu EMAIL

  CALENDAR Department of Computer Science (CS)

• Sep

  16

  Computer Science PhD Orientation

  Department of Computer Science (CS)

  8:00 AM Mudd Hall (Mudd Hall ( formerly Seeley G. Mudd Library))3514, Mudd Hall ( formerly Seeley G. Mudd Library)

  EVENT DETAILS

  New Ph.D. students and CS-affiliated faculty, all CS-affiliated Ph.D. students are welcome to attend the Fall 2024 Ph.D. orientation. This full day orientation various panels to orient PhD affiliates with the department and get answers to questions about PhD life.

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  TIME Monday, September 16, 2024 at 8:00 AM - 5:00 PM

  LOCATION Mudd Hall (Mudd Hall ( formerly Seeley G. Mudd Library))3514, Mudd Hall ( formerly Seeley G. Mudd Library)    map it

  ADD TO CALENDAR

  CONTACT PhD Student Help    phd-student-help@cs.northwestern.edu EMAIL

  CALENDAR Department of Computer Science (CS)

• Sep

  24

  Fall 2024 Classes Begin (No Northwestern Monday in Fall)

  University Academic Calendar

  All Day

  EVENT DETAILS

  Fall 2024 Classes Begin (No Northwestern Monday in Fall)

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  TIME Tuesday, September 24, 2024

  ADD TO CALENDAR

  CONTACT Office of the Registrar    nu-registrar@northwestern.edu EMAIL

  CALENDAR University Academic Calendar

• Sep

  25

  CS Seminar

  Department of Computer Science (CS)

  12:00 PM 3514, Mudd Hall ( formerly Seeley G. Mudd Library)

  EVENT DETAILS

  TBA

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  TIME Wednesday, September 25, 2024 at 12:00 PM - 1:00 PM

  LOCATION 3514, Mudd Hall ( formerly Seeley G. Mudd Library)    map it

  ADD TO CALENDAR

  CONTACT Wynante R Charles    wynante.charles@northwestern.edu EMAIL

  CALENDAR Department of Computer Science (CS)

• Sep

  30

  Last day to add a class or change a section for Fall (Last day for tuition adjustment related to enrollment changes (to or from full-time). No reductions are made to bills for dropped or swapped classes after this date)

  University Academic Calendar

  All Day

  EVENT DETAILS

  Last day to add a class or change a section for Fall (Last day for tuition adjustment related to enrollment changes (to or from full-time). No reductions are made to bills for dropped or swapped classes after this date)

  more less

  TIME Monday, September 30, 2024

  ADD TO CALENDAR

  CONTACT Office of the Registrar    nu-registrar@northwestern.edu EMAIL

  CALENDAR University Academic Calendar

• Sep

  30

  CS Seminar

  Department of Computer Science (CS)

  12:00 PM 3514, Mudd Hall ( formerly Seeley G. Mudd Library)

  EVENT DETAILS

  TBA

  more less

  TIME Monday, September 30, 2024 at 12:00 PM - 1:00 PM

  LOCATION 3514, Mudd Hall ( formerly Seeley G. Mudd Library)    map it

  ADD TO CALENDAR

  CONTACT Wynante R Charles    wynante.charles@northwestern.edu EMAIL

  CALENDAR Department of Computer Science (CS)

• Oct

  2

  CS Seminar

  Department of Computer Science (CS)

  12:00 PM 3514, Mudd Hall ( formerly Seeley G. Mudd Library)

  EVENT DETAILS

  TBA

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  TIME Wednesday, October 2, 2024 at 12:00 PM - 1:00 PM

  LOCATION 3514, Mudd Hall ( formerly Seeley G. Mudd Library)    map it

  ADD TO CALENDAR

  CONTACT Wynante R Charles    wynante.charles@northwestern.edu EMAIL

  CALENDAR Department of Computer Science (CS)

• Oct

  7

  CS Seminar

  Department of Computer Science (CS)

  12:00 PM 3514, Mudd Hall ( formerly Seeley G. Mudd Library)

  EVENT DETAILS

  TBA

  more less

  TIME Monday, October 7, 2024 at 12:00 PM - 1:00 PM

  LOCATION 3514, Mudd Hall ( formerly Seeley G. Mudd Library)    map it

  ADD TO CALENDAR

  CONTACT Wynante R Charles    wynante.charles@northwestern.edu EMAIL

  CALENDAR Department of Computer Science (CS)