Journal ArticleDOI
Cassandra: a decentralized structured storage system
Avinash Lakshman,Prashant Malik +1 more
TLDR
Cassandra is a distributed storage system for managing very large amounts of structured data spread out across many commodity servers, while providing highly available service with no single point of failure.Abstract:
Cassandra is a distributed storage system for managing very large amounts of structured data spread out across many commodity servers, while providing highly available service with no single point of failure. Cassandra aims to run on top of an infrastructure of hundreds of nodes (possibly spread across different data centers). At this scale, small and large components fail continuously. The way Cassandra manages the persistent state in the face of these failures drives the reliability and scalability of the software systems relying on this service. While in many ways Cassandra resembles a database and shares many design and implementation strategies therewith, Cassandra does not support a full relational data model; instead, it provides clients with a simple data model that supports dynamic control over data layout and format. Cassandra system was designed to run on cheap commodity hardware and handle high write throughput while not sacrificing read efficiency.read more
Citations
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Journal ArticleDOI
dCompaction: Delayed Compaction for the LSM-Tree
TL;DR: A new compaction scheme, delayed compaction (dCompaction), that decreases write amplification and avoids KV item reads and writes during compaction, and consequently improves the throughput of LSM-tree based KV stores.
Posted Content
Conflict-free Replicated Data Types: An Overview.
TL;DR: This document presents an overview of Conflict-free Replicated Data Types research and practice, organizing the presentation in the aspects relevant for the application developer, the system developer and the CRDT developer.
Journal ArticleDOI
Yugong: geo-distributed data and job placement at scale
Yuzhen Huang,Yingjie Shi,Zheng Zhong,Yihui Feng,James Cheng,Jiwei Li,Haochuan Fan,Chao Li,Tao Guan,Jingren Zhou +9 more
TL;DR: Y Yugong is presented — a system that manages data placement and job placement in Alibaba’s geo-distributed DCs, with the objective to minimize cross-DC bandwidth usage.
Proceedings ArticleDOI
Middleware design for integrating relational database and NOSQL based on data dictionary
TL;DR: A method is proposed to integrate these two types of database by adding middleware between application layer and database layer, which would provide an unified interface and shield underlying data distribution for the applications, meet the need of horizontal scalability without affecting the application logic implementation.
Proceedings ArticleDOI
Monitoring and feedback of learning processes in virtual worlds through analytics architectures: A real case
Juan Cruz-Benito,Roberto Therón,Francisco José García-Peñalvo,Cristina Maderuelo,Jonás Samuel Pérez-Blanco,Hinojal Zazo,Ana Martín-Suárez +6 more
TL;DR: A whole system that comprises several tools, which make possible the automatization of a learning process inside a virtual world with the subject of quality assurance in pharmacy laboratories are shown.
References
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Journal ArticleDOI
MapReduce: simplified data processing on large clusters
Jeffrey Dean,Sanjay Ghemawat +1 more
TL;DR: This paper presents the implementation of MapReduce, a programming model and an associated implementation for processing and generating large data sets that runs on a large cluster of commodity machines and is highly scalable.
Journal ArticleDOI
MapReduce: simplified data processing on large clusters
Jeffrey Dean,Sanjay Ghemawat +1 more
TL;DR: This presentation explains how the underlying runtime system automatically parallelizes the computation across large-scale clusters of machines, handles machine failures, and schedules inter-machine communication to make efficient use of the network and disks.
Proceedings ArticleDOI
Chord: A scalable peer-to-peer lookup service for internet applications
TL;DR: Results from theoretical analysis, simulations, and experiments show that Chord is scalable, with communication cost and the state maintained by each node scaling logarithmically with the number of Chord nodes.
Journal ArticleDOI
The Google file system
TL;DR: This paper presents file system interface extensions designed to support distributed applications, discusses many aspects of the design, and reports measurements from both micro-benchmarks and real world use.
Proceedings Article
Bigtable: A Distributed Storage System for Structured Data (Awarded Best Paper!).
Fay W. Chang,Jeffrey Dean,Sanjay Ghemawat,Wilson C. Hsieh,Deborah A. Wallach,Michael Burrows,Tushar Deepak Chandra,Andrew Fikes,Robert Gruber +8 more
TL;DR: Bigtable as mentioned in this paper is a distributed storage system for managing structured data that is designed to scale to a very large size: petabytes of data across thousands of commodity servers, including web indexing, Google Earth and Google Finance.