Cloudera Administration Handbook – How to become an effective Big Data administrator of large Hadoop clusters – #bookreview

 

 

Cloudera Administration Handbook

 Rohit Menon

Packt PublishingKindle, paperback

 

The explosive growth and use of Big Data in business, government, science and other arenas has fueled a strong demand for new Hadoop administrators. The administrators’ key duty is to set up and maintain Hadoop clusters that help process and analyze massive amounts of information.

New Hadoop administrators and those looking to join their ranks especially will want to give good consideration to The Cloudera Administration Handbook by Rohit Menon. This is a well-organized, well-written and solidly illustrated guide to building and maintaining large Apache Hadoop clusters using Cloudera Manager and CDH5.

The author has an extensive computer science background and is a Cloudera Certified Apache Hadoop Developer. He notes that “Cloudera Inc., is a Palo Alto-based American enterprise software company that provides Apache Hadoop-based software, support and services, and training to data-driven enterprises. It is often referred to as the commercial Hadoop company.”

CDH, Menon points out, is the easy shorthand name for a rather awkward software title: “Cloudera’s Distribution Including Apache Hadoop.” CDH is “an enterprise-level distribution including Apache Hadoop and several components of its ecosystem such as Apache Hive, Apache Avro, HBase, and many more. CDH is 100 percent open source,” Menon writes.

The Cloudera Manager, meanwhile, “is a web-browser-based administration tool to manage Apache Hadoop clusters. It is the centralized command center to operate the entire cluster from a single interface. Using Cloudera Manager, the administrator gets visibility for each and every component in the cluster.”

The Cloudera Manager is not explored until nearly halfway into the book, and some may wish it had been explained sooner, since they may be trying to learn it on day one of their new job. However, Menon wants readers first to become familiar with “all the steps and operations needed to set up a cluster via the command line” at a terminal. And these are, of course, important considerations to becoming an effective, knowledgeable and versatile Hadoop Administrator.  (You may not always have access to Cloudera Manager while setting up or troubleshooting a cluster.)

The book’s nine chapters show its well-focused range:

  • Chapter 1: Getting Started with Apache Hadoop
  • Chapter 2: HDFS and MapReduce
  • Chapter 3: Cloudera’s Distribution Including Apache Hadoop
  • Chapter 4: Exploring HDFS Federation and Its High Availability
  • Chapter 5: Using Cloudera Manager
  • Chapter 6: Implementing Security Using Kerberos
  • Chapter 7: Managing an Apache Hadoop Cluster
  • Chapter 8: Cluster Monitoring Using Events and Alerts
  • Chapter 9: Configuring Backups

You will have to bring some hardware and software experience and skills to the table, of course. Apache Hadoop primarily is run on Linux. “So having good Linux skills such as monitoring, troubleshooting, configuration, and security is a must” for a Hadoop administrator, Menon points out. Another requirement is being able to work comfortably with the Java Virtual Machine (JVM) and understand Java exceptions.

But those skills and his Cloudera Administration Handbook can take you from “the very basics of Hadoop” to taking up “the responsibilities of a Hadoop administrator and…managing huge Hadoop clusters.”

Si Dunn

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The Sun is God – Adrian McKinty takes readers well off the beaten path with this new historical mystery – #bookreview

 

The Sun is God

Adrian McKinty

Seventh Street Books - Kindle, paperback

Take a weird but true exotic setting. Throw in some real people and real murders. Add to the mix a fictional investigator: Will Prior, an ex-military police lieutenant who deliberately got himself cashiered from the British army during the Boer War following a deadly clash with African prisoners. Wrap it all up with a (very) surprising ending.

The Sun is God, Adrian McKinty’s new historical mystery, likely will please and amaze many readers. Trying to track down a murderer in a 1906 German nudist colony off the coast of New Guinea is a stunning and challenging departure from his Detective Sean Duffy trilogy set in the urban battles and enormous tensions of Northern Ireland in the 1980s.

McKinty is in fine form in this book as he offers up a complicated crime story set within a little-remembered slice of pre-World War I history: Part of New Guinea, north of Australia, was a German colony in the year 1906.

It is here that Will Prior is now living with his “servant girl,” Siwa, amid the colony’s failing banana, rubber and tea plantations.  While still willing to swear allegiance to the British Empire, Will now lives under German rule. So, when a German army officer, Captain Hauptmann Kessler, comes to his house one day, Will fears that it is to take back the money Germany previously loaned him to become a plantation owner. Instead, Will learns that the colony’s governor wants him, because of his past military police experience, to go with Captain Kessler to an island where some German nudists claim to have discovered the secret of immortality.

One of the immortals, unfortunately, has suddenly turned up quite dead. And while the nudists claim the victim died in his bed from malaria, an official autopsy in the capital of German New Guinea has revealed something quite different: the victim drowned and had bruise marks consistent with a struggle.

Things quickly get even more strange after Will and Kessler arrive and have to camp amid the nudists and share their dangerous diet while they attempt to find clues. There’s sex, yes, and drugs. (But the novel is set 50 years before Elvis Presley, so no rock ‘n’ roll.)  And, once danger erupts for the two investigators, they can’t call for backup, and they definitely can’t hide — not on a very small island that boats seldom visit, because it’s thought to be haunted.

Si Dunn

The Button Man – A fast-paced chase to find and stop an obsessed serial killer – #fiction #bookreview

 

The Button Man

A Hugo Marston Prequel

Mark Pryor

(Seventh Street Books - paperback, Kindle)

 

Fans of Mark Pryor’s investigator Hugo Marston will be delighted with this well-written and fast-paced new prequel to The Bookseller, the novel that started the Marston series. Likewise, The Button Man is an excellent place to start reading if you are seeking a new crime fighter to follow through the streets and countrysides of England and France.

The Button Man takes us back to Marston’s troubled early days as chief of security at the U.S. Embassy in London, before he became chief of security at the U.S. Embassy in Paris.

In both cities, Marston has a penchant for going “off the reservation,” so to speak, once he is on a case. Indeed, rather than hang around the embassy grounds, he willingly chases suspects through London, Paris and the English and French countrysides. And, as The Button Man shows, Marston often will ditch protocol, as well as jurisdiction, and risk working alone, free from the bureaucracies of British or French backup, as he moves in for the dangerous showdown.

In The Button Man, the ambassador assigns Marston to protect two well-known Americans while British police investigate them following a highly publicized hit-and-run fatality. But one of the Americans suddenly is found murdered, and the other gives Marston the slip and goes on the run.

When Marston, an ex-FBI profiler, goes after the fugitive, he doesn’t know that his pursuit is about to evolve into something much bigger than he expects. Helped along by secretive young woman with an odd name and by a pheasant-hunting member of the British parliament who’s big on law and order and tight budgets, Marston soon finds himself desperately trying to track down and stop someone different and decidedly more dangerous: an English serial killer who doesn’t agree that the way he murders his victims is a crime.

Si Dunn

Si Dunn’s books include Erwin’s Law and Dark Signals.

 

Halley – This fine, intense #YA novel explores the harsh lives that women and children faced in 1930s rural Georgia – #bookreview

Halley

Faye Gibbons

(NewSouth Books - hardcover, Kindle)

 

Life was tough in the mountains of  northeast Georgia during the Great Depression. And it was particularly hard for women, who had virtually no rights and no say in important matters, especially if they were unmarried. The rural mountain life also was tough for children, who were expected to work hard, always obey, not be heard, and waste no time on enjoyment or fun.

In Faye Gibbons’ excellent new young-adult novel, a hard, unforgiving brand of backwoods religion also holds sway in young Halley’s life. Her father, Jim Owenby, recently has died, and Halley, her mother Kate, and her young brother Robbie have been forced to move in with Kate’s mother and father. Halley’s grandfather, Pa Franklin, is a backwoods fundamentalist preacher who cuts no one any slack. He is quick to judge, criticize, preach, punish and condemn. In his eyes, the road to hell is very short and most people already are on it.

Pa Franklin also takes, or tries to take, any money earned by his wife, his daughter and his granddaughter. And he even reads their mail and sometimes throws it away before they can see it. It is his way, he thinks, of protecting them from their own helplessness.

The author grew up in northern Georgia, in a large mountain family, and she has gotten to know many of the region’s people, mill towns, and other communities. Her central character, Halley Owenby, is fourteen and dreams mainly of getting an education and somehow gaining a level of control over her own life.

The actions and confrontations that unfold in this new book are gritty, intense and sometimes dark. Yet the combined powers of hope, love, honesty and stubborn effort finally shine through and light the way to brighter possibilities for Halley and those around her.

Faye Gibbons is a superb storyteller and writer, with a fine-tuned ear for regional speech, a sharp eye for detail, and an unhidden love for her characters–even the ones who make us shudder, cringe and tighten our fists in frustration at their repeated refusals to listen, think, and change.

Si Dunn

 

 

 

 

 

 

Halley

Blind Moon Alley – John Florio’s 2nd Jersey Leo novel is a noir knockout – #bookreview

 

 

Blind Moon Alley

A Jersey Leo Novel

John Florio

(Seventh Street Books - paperback, Kindle)

 

Jersey Leo absolutely is a misfit in Prohibition-era, Depression-ravaged Philadelphia. He is a mixed-race albino who works behind the bar at the Ink Well, a speakeasy where the customers include seedy criminals and tough cops looking both for booze and bribes.

Jersey Leo breaks the law every time he pours a drink. He also knows how to use a gun and brass knuckles. And he isn’t above hiding an escaped convict.

Yet he also has genuine notions of right and wrong within his dark world where bread lines and desperation are just around the corner. Mostly, he just wants to stay out of trouble, he claims. “No, I’m not out to rid our streets of crime and corruption. All I want to do is pour some moon, make a little dough, and if the stars align, spend a bit of time with a certain five-foot-two-inch coat checker whose eyes haven’t seen enough of the real world to stop sparkling.”

Of course, that’s not how life works out in Jersey Leo’s underworld, where his street name is “Snowball.” He makes a solemn promise to a cop-killer friend now facing execution in the electric chair, and soon that promise has him running from crooked cops and trying to flee Philadelphia with a speakeasy siren named Myra. She was his grammar-school crush, he’s reasonably sure he loves her again, and he wants to take her to the West Coast, far from the murdering crowd in Philly. Yet there suddenly are more forces and complications at work than Snowball can comprehend or handle once he tries to scrape up their escape money.

Blind Moon Alley, the second Jersey Leo novel, is a thriller rich with thrills–and chills. (The series’ debut novel is Sugar Pop Moon, published last year.) John Florio is a fine writer with a smooth, taut style and tone that quickly bring to mind Dashiell Hammett, Raymond Chandler and even Robert B. Parker.  Jersey Leo, however, is not a detective. He is just, in his words, “a genetic milkshake with one too many scoops of vanilla, a piano keyboard with no sharps or flats, a punch line to an inside joke that I’ve never been in on.” He might shoot you if he has to. Or, he might give you his last dollar if he knows you are having a harder time surviving than he is.

Si Dunn

 

 

 

 

The Mob and the City: The Hidden History of How the Mafia Captured New York – #bookreview

The Mob and the City: The Hidden History of How the Mafia Captured New York

 

The Mob and the City

The Hidden History of How the Mafia Captured New York

C. Alexander Hortis

(Prometheus Books, Kindle, hardcover)

 

Forget The Godfather, its sequels and numerous other, famous “Mafia” movies. This excellent book cuts straight through the hype, fictions, and glamorizations to tell “the hidden history of how the street soldiers”–not the godfathers–“of the modern Mafia captured New York City during the 1930s, 1940s, and 1950s.” And its author convincingly argues that “the key formative decade for the Mafia was actually the 1930s”–not “the Prohibition era of the 1920s” as numerous books and movies have had us believe. During the Great Depression-ravaged Thirties, the Sicilian mafiosi , the Cosa Nostra (“Our Thing”), rose to become New York’s top crime syndicate, with thousands of foot soldiers and associates eventually “entrenched throughout the economy, neighborhoods, and nightlife of New York.”

The Mob and the City is well-written and superbly researched. C. Alexander Hortis has dug deeply into available resources but also uncovered important new data sources, including previously secret files obtained via the Freedom of Information Act. Hortis presents a convincing case that there was (1) never really a “golden age of gangsters” in New York and (2) definitely not much honor among thieves. “The wiseguys,” he writes, “broke every one of their ‘rules,’ trafficked drugs almost from the beginning, became government informers, betrayed each other, lied, and cheated.” Hortis’s story of how New York City’s booming economy also offered the major crime syndicates “an embarrassment of riches” to exploit and plunder is fascinating and eye-opening reading.

Si Dunn

 

 

 

 

 

 

 

 

 

 

 

 

The Well-Grounded Rubyist, 2nd Edition – A solid, well-written, updated guide to the Ruby programming language – #bookreview

 

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The Well-Grounded Rubyist

David A. Black

(Manning - paperback)

Ruby, predominately known as an object-oriented programming language, shows up frequently on lists of the top ten (or whatever) languages to know. And Ruby has long been paired with Rails to create the popular Ruby on Rails web application framework.

When the forerunner of this book appeared eight years ago, it was titled Ruby for Rails: Ruby Techniques for Rails Developers. And R4R, as it is sometimes known, was well received in both the Ruby and Rails camps.

In 2009, the R4R book was revised and retitled The Well-Grounded Rubyist. “This new edition is  a descendant of R4R but not exactly an update. It’s more of a repurposing,” the author, David A. Black, noted at the time. “The Well-Grounded Rubyist is a ‘just Ruby’ book, and it’s written to be read by anyone interested in Ruby.”

That focus continues in this second edition, which has been updated to cover Ruby 2.1. Ruby newcomers can get started and advance quickly with this fine “just Ruby” book in hand. Ruby veterans also can use it to gain new knowledge and sharpen familiar skills.

Black approaches the process of explaining Ruby “as a kind of widening spiral, building on the familiar but always opening out into the unknown.”

His well-written text does not try to be a “complete” language reference. Instead, reading The Well-Grounded Rubyist is like having a well-experienced and patient mentor close at hand–a mentor who willingly offers up clear examples and explanations. You likely will want to keep this book around as a go-to how-to reference long after you have learned and begun to work with Ruby.

It does help to have at least a little experience with programming before you tackle Ruby and this book. And, if you already have an older version of Ruby installed on your computer, upgrade it to 2.1.x. (As this review is being written, 2.1.2 is the current version.)

Yes, Ruby can be used in several different programming paradigms, including functional and imperative. But The Well-Grounded Rubyist is essentially all-object-oriented-all-the-time in its approach.

“Ruby is an object-oriented language, and the sooner you dive into how Ruby handles objects, the better,” Black states. “Accordingly, objects will serve both as a way to bootstrap the discussion of the language (and your knowledge of it) and as a golden thread leading us to further topics and techniques.”

Si Dunn