Why do you go down the system ★ Naotaka Owada Nikkei BP
Description of item	System disorders and reliability basic knowledge books that you want to know why the system goes down Naotaka Owada (Author), Nikkei Computer (supervision, supervision) Nikkei BP 2009/1/31 1st edition 2 Printing used goods. Introduction of content Bank ATM suspension, seat reservations, stock inconvenience -Thorough explanation of causes and mechanisms! It can be used 24 hours a day, naturally normal operation. Once down, the information systems of companies and government agencies that support the world that is convenient as social infrastructure will cause major problems.. A reporter of Nikkei Computer magazine, who has tracked many information systems troubles, analyzes down cases that have occurred in the past 10 years from a cool perspective.. We will explain the system of technology and down the system with many examples of the technology and the cause of down.. Features 1: Reliable mechanism seen from the "down" perspective The information system incorporates a variety of technologies in order to move normally, assuming an exceptional situation, and is used based on the operation rules.. However, even after repeating such technologies and ingenuity and repeating tests, system down is occurring.. In this book, we first explain the basic technology and operation method for normal operation, followed by the actual down case, despite such a technology, and the fact that it is actually down in reality. I will see if it was lurking. Features 2: The cause of the system down is classified into four and explained! System down causes various causes, and multiple factors may be involved, but if you pierce it, you will reach one cause.. In this book, it classifies into four categories: "software defects", "lack of performance / capacity", "setting / operation mistakes", and "unexpected accidents", and the root cause has caused one after another to lead to down. I will solve the cause of the entanglement. Features 3:52 The actual situation of down shown by the case! Nikkei Computer, including 40 billion yen loss in stock order, 110,000 ATMs suspended, trains urgent, computer system dates, duplicate diversion of account transfer, data center fire, and two servers at the same time. We will take up typical 52 cases from the past 10 years of down cases taken by the magazine, and learn measures to prevent "down" a major trouble.. Contents (from "BOOK" database) Bank ATM suspension, seat reservation incapable, stock inconvenience -In detail the cause and mechanism. Let's acquire "Basic" that will be accepted in 10 years. table of contents Chapter 1 System stopped ... ――What is “down”? 1.1 Stop = Down is misunderstood 1.2 down is divided into 4 types from the cause Chapter 2 should have been tested properly ... ―― Bug in application software 2.1 A 20th century bug that suddenly wakes up 2.2 "Date problem" that comes when you forget 2.3 Database deadlock fires repeatedly COLUMN here System Down Consultation Center Is the system down one of the "3K"? Chapter 3 Not only applications ... ―― OS, malfunction of middleware 3.1 The stop cannot be detected 3.2 If you change the combination, it will not work 3.3 Do not release while grabbing memory Chapter 4 I can't withstand the flood of access ... ―― Insufficient performance / capacity 4.1 I can't make use of the performance of hardware 4.2 Memory, CPU is not enough 4.3 The increase in communication data turns down 4.4 The database is full 4.5 Batch processing does not end even after dawn COLUMN here System Down Consultation Center Is the operator being scolded and the role? Chapter 5 is not allowed if you did not notice ... ――In environment setting / change error 5.1 Change parameters to miss 5.2 System environment change mistakes 5.3 Forget to apply a patch file 5.4 Calendar setting mistakes Chapter 6 That "inadvertent" is fatal ... ―― Operation / operation error 6.1 Make a mistake in the operation command 6.2 Migration / Input mistakes of data 6.3 Failed to switch to standby system 6.4 Confusion creates a "secondary disaster" and expands damage Chapter 7 No way, this happens ... ―― Hard failure, unexpected accidents 7.1 The server is broken 7.2 Communication network is out of communication 7.3 Computers, if there is no electricity, just a box 7.4 Data Center destroyed / burned down due to the earthquake COLUMN here System Down Consultation Center Are you in trouble because the down is too reduced? Chapter 8 Disability correspondence is a fight against time ... ―― Learn down 8.1 Priority of recovery over the cause of the cause 1608
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