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Studiegids

nl en

Distributed Data Processing Systems

Vak
2020-2021

Admission requirements

This is a practical-intensive course, which involves lots of low-level systems programming. Mastering all this is also highly rewarding. Students are assumed to have taken courses in (advanced) programming, computer architecture/organization, computer networks, and operating systems at a BSc level.

Description

Distributed (data processing) systems are already pervasive, most members of our society interact with them daily. Social networks, government services, media streaming services--all systems heavily interfacing with the members of our society--are powered by distributed (data processing systems). Such systems are composed of many physically distributed computers, all connected through a network which acts as a means of communication. The data processing component of large-scale distributed systems regards all services that handle data. Such systems include data storage (e.g., HDFS, Ceph), data transmission and queueing (e.g., gRPC, ZeroMQ), key-value stores (e.g., Redis, Cassandra), and analytics (e.g., Spark, Hive), batch (e.g., Hadoop) and stream processing (e.g., Flink), as well as machine learning (e.g., Tensorflow, pytorch). Most of our online interactions generate data that passes through one or more of such systems.

As computer scientists, systems engineers, or devops, most of the large-scale systems we work with, either directly or indirectly, are actually distributed data processing systems. Both academia and industry invest significant effort into: (i) understanding the performance of these systems; (ii) understanding the interaction between these systems and their underlying computing infrastructure; (iii) defining principled design processes for building such systems; and (iv) building more efficient systems, that seamlessly scale with the number of users, machines, and workloads.

This course is a highly practical, systems-first approach at understanding distributed data processing systems. We will discuss general topics on the design of data processing systems, such as which parts are these composed of (e.g., storage, resource management, scheduling, communication). We will also treat general topics on performance evaluation, such as: benchmarking, workloads, metrics, statistical analysis, and how to design repeatable experiments. Finally, we also discuss more general distributed systems topics, such as their (non-)functional requirements: communication/RPC, fault-tolerance, consensus.

Course objectives

After following this course, students will be able to:
1. Explain the main concepts of distributed data processing systems, e.g., communication, resource management and scheduling, data consistency, fault-tolerance, performance.
2. Explain and identify trade-offs for designing certain components of distributed data processing systems, e.g., erasure-coding vs. replication for fault-tolerance.
3. Apply state-of-the-art experiment design techniques for reproducible performance evaluation.
4. Design, build, and evaluate distributed data processing systems.
5. Deploy and run on real-world distributed infrastructure (e.g., DAS-5) state-of-the-art distributed data processing systems (e.g., Spark, Hadoop, Flink etc.)

Timetable

The course takes place, according to the official schedule, every Tuesday 14:15-16:00.

Mode of instruction

The course is composed of three components:
1. Lectures given by the instructor, to setup course format, assignments, and to teach key topics in distributed data processing systems.
2. Self-study Lab Assignments. Students are expected to work on the lab assignments autonomously, outside of the lectures. This is a hands-on course, where the lab constitutes a large part of the final grade. There are two large-scale lab components: (1) a reproducibility study, where students implement several experiments from existing papers, to get acquainted with modern technology and state-of-the-art in experiment design; (2) a build-your-own-distributed-system, where students learn how to build a prototype distributed system.
3. Student Presentations and in-class discussion. Each student should prepare a 20-min presentation on a scientific article. This is followed by a 10-min Q&A discussion session, where all other students participate.

Assessment Method

The assessment method is based on the following student assignments:

  • Reproducibility study: 35% (group-based)

  • Build a system: 35% (group-based)

  • Presentation: 20% (individual)

  • Paper reviews: 10% (individual)

Each student must score a sufficient score (>= 5.5) in each of the four sub-parts of the grade. Partial scores will not be kept between academic years.

The teacher will inform the students how the inspection of and follow-up discussion of the exams will take place.

Reading list

There is no book to follow, students will be given at the beginning of the course a literature list which will be available via Brightspace.

Registration

Contact

Please contact the course coordinator: Alexandru Uta, a.uta@liacs.leidenuniv.nl

Remarks