Linux journal France est un journal francophone mensuel spécialisé dans GNU/Linux et les logiciels libres. Il est publié par les éditions Diamond, qui publient également MISC, Linux Pratique et Linux Pratique Essentiel.
- Learn the right way to set up and use Cassandra from the floor up
- Design wealthy schemas that seize the relationships among varied information varieties utilizing compound fundamental keys
- Master the complex gains to be had in Cassandra 2.0 via a step by step educational that builds a real-world application's database layer.
Cassandra is a allotted database that sticks out for its strong function set and intuitive interface, whereas nonetheless delivering the excessive availability and scalability of a disbursed store.
Starting from fitting Cassandra and developing your first keyspace, to gaining knowledge of the several desk buildings Cassandra deals and exploring the newest and strongest positive aspects of the Cassandra question Language, CQL3, this ebook explores every one subject in the course of the lens of a real-world instance software. With lots of examples, tips, and transparent reasons, you will grasp compound fundamental keys, assortment columns, light-weight transactions, and plenty of different complicated points of Cassandra.
By the top of the ebook, you will be totally built to construct robust, scalable Cassandra database layers on your applications.
What you'll learn
- Install Cassandra and create your first keyspace
- Choose the proper desk constitution for the duty handy in various scenarios
- Use variety slice queries for effective info access
- Effortlessly deal with concurrent updates with assortment columns
- Ensure facts integrity with light-weight transactions and logged batches
- Understand eventual consistency and use the ideal consistency point in your situation
- Implement top practices for information modeling and access
About the Author
Mat Brown is a qualified software program engineer in Brooklyn, long island. In his profession, he has eager about development consumer-facing net and cellular functions for numerous businesses; he at present works at Genius.
Table of Contents
- Getting up and operating with Cassandra
- The First Table
- Organizing comparable Data
- Beyond Key-value Lookup
- Establishing Relationships
- Denormalizing info for optimum Performance
- Expanding Your info Model
- Collections, Tuples, and User-defined Types
- Aggregating Time-series Data
- How Cassandra Distributes Data
By Derek Vadala
Redundant Array of self reliant Disks (RAID) know-how is changing into a customary function of computers that aid mission-critical providers like dossier sharing, mail trade, or internet servers. RAID bargains advantages to those crucial platforms: greater I/O functionality and fail-safe facts storage.Although bandwidth difficulties on networks are good documented, the inner facts move bottleneck that exists on the point in every one method may also go away you with difficult functionality concerns. RAID is a cheap and easy-to-manage solution to alleviate this bandwidth challenge via allotting the I/O load seamlessly throughout a number of disks and controllers.RAID additionally presents uninterrupted information entry via disk mirroring and parity algorithms. that implies platforms can stay on-line even in the course of a disk or controller failure. RAID is scalable, making it powerful adequate for big, high-traffic websites and small, severe structures. by utilizing RAID, approach directors can mix unmarried disks into terabytes worthy of knowledge storage.Managing RAID on Linux covers every thing method directors want to know to place jointly a method which may aid RAID. you are going to know about the differing kinds of RAID, besides linked applied sciences and matters, and the way to settle on the easiest RAID method to your wishes. With a step by step, hands-on technique, the writer courses you thru the set up of both Linux software program RAID or a RAID card. The booklet indicates tips on how to construct an array and optionally set up a high-performance dossier approach. Contents include:
* An advent to RAID and Linux
* making plans and structure of your RAID system
* construction a software program RAID
* software program RAID instruments and references
* construction a RAID
* functionality and tuning of your RAID system
RAID has develop into the reasonably cheap resolution of option to care for the ever-increasing call for for information space for storing. Written for method directors, energy clients, tech managers, and a person who desires to know about RAID expertise, handling RAID on Linux sidesteps the often-confusing vendor-specific procedure you'll locate in different places to offer you the instantly tale on RAID. Even non-Linux clients will locate this ebook filled with priceless fabric.
By Arnold Robbins, Elbert Hannah
There's not anything that hard-core Unix and Linux clients are extra fanatical approximately than their textual content editor. Editors are the topic of adoration and worship, or of scorn and mock, based upon no matter if the subject of debate is your editor or anyone else's.
vi has been the normal editor for with regards to 30 years. renowned on Unix and Linux, it has a becoming following on home windows structures, too. so much skilled process directors cite vi as their software of selection. and because 1986, this e-book has been the advisor for vi.
However, Unix structures aren't what they have been 30 years in the past, and nor is this ebook. whereas holding the entire worthwhile beneficial properties of earlier versions, the seventh version of Learning the vi and vim Editors has been multiplied to incorporate designated details on vim, the top vi clone. vim is the default model of vi on so much Linux structures and on Mac OS X, and is offered for plenty of different working structures too.
With this consultant, you examine textual content modifying fundamentals and complicated instruments for either editors, corresponding to multi-window enhancing, tips on how to write either interactive macros and scripts to increase the editor, and tool instruments for programmers -- all within the easy-to-follow kind that has made this publication a classic.
Learning the vi and vim Editors includes:
A whole advent to textual content enhancing with vi:
How to make complete use of vim:
Coverage of 3 different renowned vi clones -- nvi, elvis, and vile -- can be integrated. you can find numerous beneficial appendixes, together with an alphabetical speedy connection with either vi and ex mode instructions for normal vi and for vim, plus an up to date appendix on vi and the Internet.
Learning both vi or vim is needed wisdom if you happen to use Linux or Unix, and in both case, studying this e-book is vital. After studying this booklet, the alternative of editor should be visible for you too.
By Roderick W. Smith
A precise, full-color creation to Linux fundamentals
Serving as a inexpensive, safe replacement to pricey working platforms, Linux is a UNIX-based, open resource working approach. Full-color and concise, this beginner's consultant takes a learning-by-doing method of realizing the necessities of Linux. each one bankruptcy starts via sincerely selecting what you are going to research within the bankruptcy, by way of a simple dialogue of techniques that leads you correct into hands-on tutorials. Chapters finish with extra routines and evaluate questions, permitting you to augment and degree your understanding.
This e-book is vital examining for an individual getting into the area of Linux!
There's loads of pleasure surrounding using Linux in embedded platforms -- for every thing from cellphones to motor vehicle ABS platforms and water-filtration crops -- yet no longer loads of functional details. Building Embedded Linux Systems bargains an in-depth, hard-core consultant to assembling embedded structures in keeping with Linux.
Updated for the newest model of the Linux kernel, this re-creation grants the fundamentals of establishing embedded Linux platforms, besides the configuration, setup, and use of greater than forty assorted open resource and loose software program applications in universal use. The publication additionally appears on the strengths and weaknesses of utilizing Linux in an embedded procedure, plus a dialogue of licensing matters, and an creation to real-time, with a dialogue of real-time ideas for Linux.
This necessary publication good points arcane and formerly undocumented approaches for:
- Building your personal GNU improvement toolchain
- Using an effective embedded improvement framework
- Selecting, configuring, construction, and fitting a target-specific kernel
- Creating an entire goal root filesystem
- Setting up, manipulating, and utilizing solid-state garage devices
- Installing and configuring a bootloader for the target
- Cross-compiling a slew of utilities and packages
- Debugging your embedded method utilizing a plethora of instruments and techniques
- Using the uClibc, BusyBox, U-Boot, OpenSSH, thttpd, tftp, strace, and gdb packages
By providing the right way to construct the working approach elements from pristine resources and the way to discover extra documentation or aid, Building Embedded Linux Systems drastically simplifies the duty of conserving entire keep an eye on over your embedded working system.
By Yochai Benkler
What do Wikipedia, Zip Car’s company version, Barack Obama's presidential crusade, and a small team of lobster fishermen have in universal? all of them express the facility and promise of human cooperation in reworking our companies, our executive, and our society at huge. simply because at the present time, whilst the prices of participating are below ever prior to, there aren't any limits to what we will be able to in attaining by way of operating together.
For centuries, we as a society have operated in keeping with a truly unflattering view of human nature: that, people are universally and inherently egocentric creatures. hence, our such a lot deeply entrenched social buildings – our top-down enterprise types, our punitive felony structures, our market-based ways to every little thing from schooling reform to environmental law - were outfitted at the premise that people are pushed in basic terms through self curiosity, programmed to reply in basic terms to the invisible hand of the loose markets or the iron fist of a controlling government.
In the decade, even if, this fallacy has eventually started to resolve, as enormous quantities of reviews carried out throughout dozens of cultures have chanced on that the majority humans will act way more cooperatively than formerly believed. the following, Harvard college Professor Yochai Benkler attracts on state-of-the-art findings from neuroscience, economics, sociology, evolutionary biology, political technological know-how, and a wealth of genuine global examples to debunk this long-held delusion and show how we will harness the facility of human cooperation to enhance company strategies, layout smarter know-how, reform our financial platforms, maximize volunteer contributions to technology, lessen crime, increase the efficacy of civic activities, and extra.
For instance, he describes how:
• By construction on numerous voluntary contributions, open-source software program groups have constructed the most very important infrastructure on which the area broad internet runs
• Experiments with pay-as-you-wish pricing within the tune display that enthusiasts will voluntarily pay way more for his or her favourite song than financial versions could ever predic
• Many self-regulating groups, from the lobster fishermen of Maine to farmers in Spain, reside inside of self-regulating method for sharing and allocating communal resources
• Despite contemporary setbacks, Toyota’s collaborative shop-floor, provide chain, and administration constitution contributed to its meteoric upward thrust above its American opposite numbers for over 1 / 4 century.
• Police precincts around the state have controlled to lessen crime in tricky neighborhoods via collaborative, trust-based, group partnerships.
A must-read for somebody who desires to comprehend the dynamics of cooperation in twenty first century existence, The Penguin and the Leviathan not just demanding situations such a lot of of the ways that we are living and paintings, it forces us to reconsider our complete view of human nature.
By Matthew Helmke
Matthew Helmke, Amber Graner, "The reputable Ubuntu ebook, seventh Edition"
2012 | ISBN-10: 0133017605 | EPUB | 432 pages | 10 + 21 MB
Ubuntu is an entire, loose working procedure that emphasizes ease of use, group, and aid whereas improving pace, energy, and suppleness. it's designed for everybody from computing device newcomers to experts.
This name serves a large viewers: beginners who simply are looking to attempt the waters and provides Ubuntu a attempt, intermediate clients, and those that are looking to take the next move towards turning into strength clients. it isn't meant as a consultant to hugely technical makes use of like expert platforms management or programming, even though there's a few technical fabric the following; the focal point is on studying the landscape.
New during this version is deep insurance of the groundbreaking, user-experience-focused team spirit machine, an cutting edge new type of human—computer interplay that has gone through vast improvement and trying out to supply robust, industry-leading usability.
In addition, you will
Learn easy methods to use and customise Ubuntu for domestic, small enterprise, university, executive, and firm environments
Learn tips on how to fast replace Ubuntu to generation models with upgraded applications
Find up to date troubleshooting recommendation from Ubuntu clients all over the world to get the assistance you would like quickly
Learn Ubuntu Server set up and management, together with LVM and RAID implementation
By Helmut Herold
Dieses Buch beschreibt die Systemprogrammierung unter Linux/Unix. Unix bietet wie
jedes Betriebssystem sogenannte Systemaufrufe an, die von den Benutzerprogrammen
aus aufgerufen werden können, wenn diese bestimmte Dienste vom process benötigen.
Typische von einem Betriebssystem angebotene Dienste sind z.B. Öffnen einer Datei,
Schreiben auf eine Datei, Bereitstellen von freiem Speicherplatz oder Kommunizieren mit
Diese Systemaufrufe werden ebenso wie andere wichtige Funktionen aus der C-Stan-
dardbibliothek in diesem Buch anhand von zahlreichen anschaulichen Beispielen aus-
führlich beschrieben. Praxisnahe Übungen am Ende jedes Kapitels ermöglichen dem
Leser das Anwenden und Vertiefen der jeweils erworbenen Kenntnisse.
An entsprechenden Stellen wird in diesem Buch die Umsetzung von wichtigen Betriebs-
systemkonzepten und -algorithmen am process Linux gezeigt. Dieses approach wurde nicht
nur aufgrund seiner großen Beliebtheit ausgewählt, sondern auch, weil Linux alle seine
Quellprogramme der Öffentlichkeit zur Verfügung stellt.
By Tony Steidler-Dennison, Stuart Langridge
This publication is the last word advisor to developing, optimizing and securing the Apache net server on a Linux approach. no matter if you’re making plans on working Linux at domestic, or on a leased net Server, this publication will stroll you step by step via all the universal management projects, from handling site visitors reporting to log-file rotation. This consultant even contains step by step directions on fitting Linux (Fedora 4), Apache 2.0, personal home page five and MySQL 4.1 on a house or workplace improvement server, so that you can attempt all your purposes ahead of rolling them out.