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Cluster Computing and MapReduce Lecture 3
Cluster Computing and MapReduce Lecture 3
Published: 2007/08/28
Channel: Google Developers
GOOGLE FILE SYSTEM
GOOGLE FILE SYSTEM
Published: 2017/09/28
Channel: Veena Rathi
Star TV - Canlı Yayın HD
Star TV - Canlı Yayın HD
Published: 2016/11/02
Channel: STARTVSTAR
硅谷之路 9:深入浅出Google File System
硅谷之路 9:深入浅出Google File System
Published: 2017/05/16
Channel: BitTiger官方频道 BitTiger Official Channel
Case Study 03 - The Google File System (GFS)
Case Study 03 - The Google File System (GFS)
Published: 2017/08/07
Channel: Distributed Systems
05 May 2014: GFS
05 May 2014: GFS
Published: 2014/05/06
Channel: Geoffrey Challen
Google File System
Google File System
Published: 2015/10/23
Channel: Audiopedia
GFS MSc 2015
GFS MSc 2015
Published: 2015/07/06
Channel: sumithmoratuwa
CHRP-PCA M01 C02 VD Google File System
CHRP-PCA M01 C02 VD Google File System
Published: 2017/06/08
Channel: InurturePro Sme
File Systems as Fast As Possible
File Systems as Fast As Possible
Published: 2016/05/03
Channel: Techquickie
Google File Stream
Google File Stream
Published: 2017/10/13
Channel: U5 Instructional Technology
Google Drive File Stream - First Look
Google Drive File Stream - First Look
Published: 2017/04/23
Channel: Jamesss
What is GOOGLE FILE SYSTEM? What does GOOGLE FILE SYSTEM mean? GOOGLE FILE SYSTEM meaning
What is GOOGLE FILE SYSTEM? What does GOOGLE FILE SYSTEM mean? GOOGLE FILE SYSTEM meaning
Published: 2017/11/04
Channel: The Audiopedia
The Hadoop File System (GFS, MAP REDUCE, BIG TABLE)
The Hadoop File System (GFS, MAP REDUCE, BIG TABLE)
Published: 2016/11/28
Channel: Cliff Green
File System Concept
File System Concept
Published: 2015/02/23
Channel: Udacity
Collaborate and Store Files with Team Drive | The G Suite Show
Collaborate and Store Files with Team Drive | The G Suite Show
Published: 2017/03/28
Channel: G Suite
Google File System
Google File System
Published: 2015/04/01
Channel: Roman Khabirov
Inside a Google data center
Inside a Google data center
Published: 2014/12/17
Channel: G Suite
Google File System (GFS o GooFS)
Google File System (GFS o GooFS)
Published: 2012/05/11
Channel: Manuel de la Torre
Google File System - parte 1
Google File System - parte 1
Published: 2013/08/16
Channel: PinguimVideos
Google File System
Google File System
Published: 2016/02/02
Channel: Kevin Rutz
硅谷之路 9 深入浅出Google File System
硅谷之路 9 深入浅出Google File System
Published: 2016/04/13
Channel: BitTiger官方频道 BitTiger Official Channel
google file system research paper
google file system research paper
Published: 2017/04/25
Channel: Федор Жарыхин
Hadoop Distributed File System (HDFS) Introduction
Hadoop Distributed File System (HDFS) Introduction
Published: 2013/01/29
Channel: Hortonworks
What is local file system & What is HDFS
What is local file system & What is HDFS
Published: 2014/07/12
Channel: Durga Software Solutions
Google File System - parte 2
Google File System - parte 2
Published: 2013/08/16
Channel: PinguimVideos
El Google File System
El Google File System
Published: 2012/05/30
Channel: JoseKstro
Google Drive SDK Live: Google Drive vs Traditional File Systems
Google Drive SDK Live: Google Drive vs Traditional File Systems
Published: 2012/08/13
Channel: Google Developers
Optimal Flash Provisioning for Cloud Storage Workloads in Google
Optimal Flash Provisioning for Cloud Storage Workloads in Google's Colossus File System
Published: 2014/06/24
Channel: hkoie
Modeling and Verifying Google File System
Modeling and Verifying Google File System
Published: 2015/11/09
Channel: IEEE PROJECTS 2016-2017
FileSystem MetaData | HDFS | Hadoop Distributed File System
FileSystem MetaData | HDFS | Hadoop Distributed File System
Published: 2017/05/29
Channel: IT Skills In Demand
Hadoop Distributed File System (HDFS)
Hadoop Distributed File System (HDFS)
Published: 2015/03/27
Channel: Sarah McGinn
Google File System - parte 3
Google File System - parte 3
Published: 2013/08/16
Channel: PinguimVideos
The Linux File System - Explained
The Linux File System - Explained
Published: 2012/11/17
Channel: Nixie Pixel
Sync File System API
Sync File System API
Published: 2014/10/14
Channel: Chromette
Hadoop Tutorial: Intro to HDFS
Hadoop Tutorial: Intro to HDFS
Published: 2012/10/31
Channel: InfoQ
Hadoop Distributed Filesystem (HDFS) And Its Features
Hadoop Distributed Filesystem (HDFS) And Its Features
Published: 2016/12/25
Channel: Code Complete-The spirit of coding
Google Glass Android processes and file system
Google Glass Android processes and file system
Published: 2013/05/03
Channel: Siamak Ashrafi
Wuala - a distributed file system
Wuala - a distributed file system
Published: 2007/11/02
Channel: GoogleTechTalks
Лекция 16: Распределенные файловые системы. Google Filesystem. Основные особенности
Лекция 16: Распределенные файловые системы. Google Filesystem. Основные особенности
Published: 2016/03/27
Channel: НОУ ИНТУИТ
What is Hadoop Distributed File System (HDFS)?
What is Hadoop Distributed File System (HDFS)?
Published: 2017/06/13
Channel: BigData 101
Chrome Apps Office Hours: Synchronized File System
Chrome Apps Office Hours: Synchronized File System
Published: 2013/03/13
Channel: Google Developers
Seattle Conference on Scalability: Lustre File System
Seattle Conference on Scalability: Lustre File System
Published: 2012/08/22
Channel: GoogleTalksArchive
27 File System Architecture - 1
27 File System Architecture - 1
Published: 2013/04/10
Channel: kashyap B
Course Preview: Android File System
Course Preview: Android File System
Published: 2017/03/30
Channel: Pluralsight
The Reiser4 Filesystem
The Reiser4 Filesystem
Published: 2012/08/22
Channel: GoogleTalksArchive
File System - Telugu
File System - Telugu
Published: 2014/11/15
Channel: Spoken-Tutorial IIT Bombay
File Server Migration to Google Drive
File Server Migration to Google Drive
Published: 2012/09/07
Channel: SADA Systems, Inc.
best app to manage your files|| Google File go|| what is google File go and how its work
best app to manage your files|| Google File go|| what is google File go and how its work
Published: 2017/11/11
Channel: Techno Info & WD
Seattle Conference on Scalability: Lustre File System
Seattle Conference on Scalability: Lustre File System
Published: 2007/10/09
Channel: GoogleTechTalks
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WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
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Google File System
Operating system Linux kernel
Type Distributed file system
License Proprietary

Google File System (GFS or GoogleFS) is a proprietary distributed file system developed by Google to provide efficient, reliable access to data using large clusters of commodity hardware. A new version of Google File System code named Colossus was released in 2010.[1][2]

Design[edit]

Google File System is designed for system-to-system interaction, and not for user-to-system interaction. The chunk servers replicate the data automatically.

GFS is enhanced for Google's core data storage and usage needs (primarily the search engine), which can generate enormous amounts of data that must be retained; Google File System grew out of an earlier Google effort, "BigFiles", developed by Larry Page and Sergey Brin in the early days of Google, while it was still located in Stanford. Files are divided into fixed-size chunks of 64 megabytes, similar to clusters or sectors in regular file systems, which are only extremely rarely overwritten, or shrunk; files are usually appended to or read. It is also designed and optimized to run on Google's computing clusters, dense nodes which consist of cheap "commodity" computers, which means precautions must be taken against the high failure rate of individual nodes and the subsequent data loss. Other design decisions select for high data throughputs, even when it comes at the cost of latency.

A GFS cluster consists of multiple nodes. These nodes are divided into two types: one Master node and a large number of Chunkservers. Each file is divided into fixed-size chunks. Chunk servers store these chunks. Each chunk is assigned a unique 64-bit label by the master node at the time of creation, and logical mappings of files to constituent chunks are maintained. Each chunk is replicated several times throughout the network, with the minimum being three, but even more for files that have high end-in demand or need more redundancy.

The Master server does not usually store the actual chunks, but rather all the metadata associated with the chunks, such as the tables mapping the 64-bit labels to chunk locations and the files they make up, the locations of the copies of the chunks, what processes are reading or writing to a particular chunk, or taking a "snapshot" of the chunk pursuant to replicate it (usually at the instigation of the Master server, when, due to node failures, the number of copies of a chunk has fallen beneath the set number). All this metadata is kept current by the Master server periodically receiving updates from each chunk server ("Heart-beat messages").

Permissions for modifications are handled by a system of time-limited, expiring "leases", where the Master server grants permission to a process for a finite period of time during which no other process will be granted permission by the Master server to modify the chunk. The modifying chunkserver, which is always the primary chunk holder, then propagates the changes to the chunkservers with the backup copies. The changes are not saved until all chunkservers acknowledge, thus guaranteeing the completion and atomicity of the operation.

Programs access the chunks by first querying the Master server for the locations of the desired chunks; if the chunks are not being operated on (i.e. no outstanding leases exist), the Master replies with the locations, and the program then contacts and receives the data from the chunkserver directly (similar to Kazaa and its supernodes).

Unlike most other file systems, GFS is not implemented in the kernel of an operating system, but is instead provided as a userspace library.

Performance[edit]

Deciding from benchmarking results,[3] when used with relatively small number of servers (15), the file system achieves reading performance comparable to that of a single disk (80–100 MB/s), but has a reduced write performance (30 MB/s), and is relatively slow (5 MB/s) in appending data to existing files. (The authors present no results on random seek time.) As the master node is not directly involved in data reading (the data are passed from the chunk server directly to the reading client), the read rate increases significantly with the number of chunk servers, achieving 583 MB/s for 342 nodes. Aggregating a large number of servers also allows big capacity, while it is somewhat reduced by storing data in three independent locations (to provide redundancy).

See also[edit]

References[edit]

  1. ^ "Google's Colossus Makes Search Real-Time by Dumping MapReduce", High Scalability (World Wide Web log), 2010-09-11 .
  2. ^ "Colossus: Successor to the Google File System (GFS)". SysTutorials. 2012-11-29. Retrieved 2016-05-10. 
  3. ^ Ghemawat, Gobioff & Leung 2003.

Bibliography[edit]

External links[edit]

  • "GFS: Evolution on Fast-forward", Queue, ACM .
  • "Google File System Eval, Part I", Storage mojo .

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