7CCSMBDT- Tutorial 1 Huiping Chen huiping.chen@kcl.ac.uk Big Data Technologies in the labs In practice, the big data technologies that we will discuss in the module run in powerful servers (on the cloud) and are managed by professionals. We want to be able to use these big data technologies in a “testing” environment and with little […]
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DISTRIBUTED SYSTEMS 2PC, 3PC, PAXOS [SKYPE] 1 3PC AND PAXOS Last week(s) … Introduction to fault tolerance Adaptive timeouts & probes Semantic models at-most-once at-least-once zero-or-once … DISTRIBUTED SYSTEMS 2 3PC AND PAXOS 3PC AND PAXOS System model: Everything can fail! Need to establish the system model in order to determine algorithm System model fails:
distributed systems SEMESTER 2, 2020 DISTRIBUTED FILESYSTEMS This lecture … Distributed file systems – one of the first uses of distributed computing challenges general design considerations NFS (Networked File System) GFS (Google File System) HDFS (Hadoop Distributed File System) PFS (Parallel File System) Definition of a DFS • DFS: File system spread over multiple sites,
distributed systems 2020 CONSISTENCY MODELS 1 CONSISTENCY MODELS Motivation Requirements for a distributed system Security Scalability Availability Performance Common solution: replication Tradeoff: high availability vs data consistency DISTRIBUTED SYSTEMS 2 CONSISTENCY MODELS CONSISTENCY MODELS Data Consistency ADD 10%! (REQUEST A) ADD 100$! (REQUEST B) REQUEST A, THEN REQUEST B REQUEST
CS 425/ECE 428 Fall 2020 – Practice Midterm (Midterm is structured in the same way, and for same time as, regular midterm.) On-campus exam Date: Practice Exam time For All Students: 90 minutes. Exam will be available for 6 hours once you start. Applies to both on-campus and Coursera. Instructions: 1. Please hand in solutions
CS 425/ECE 428 Fall 2020 – Practice Midterm (Midterm is structured in the same way, and for same time as, regular midterm.) On-campus exam Date: Practice Exam time For All Students: 90 minutes. Exam will be available for 6 hours once you start. Applies to both on-campus and Coursera. Instructions: 1. Please hand in solutions
ISOM3015 (001 & 002) Assignment 1 (Due date: 14 October) (e-copy submission before class in Moodle & hard-copy submission in class) There is a small table called Employee with the following data: Copyright By PowCoder代写 加微信 powcoder We would like to write an application to process the input dataset to find the highest salaried employee
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RMIT Classification: Trusted Big Data Processing COSC 2637/2633 Assignment 2 Assessment Type Individual assignment. Submit online via Canvas → Assignment 2. Marks awarded for meeting requirements as closely as possible. Clarifications/updates may be made via announcements or relevant discussion forums. Due Date Week 12, Friday 23:59, 16 October Marks 40 Overview Write MapReduce and Spark
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Non-relational data and NoSQL Non-relational data and NoSQL Copyright By PowCoder代写 加微信 powcoder Relational Databases Relational DBs replaced file based data processing and offered huge improvements Invented by . Codd in 1970s Very rigid two-dimensional design for data organization Based on extensive utilization of SQL Only works with structured data Great for management of transactional
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