MySQL High Availability: Tools for Building Robust Data by Charles Bell, Mats Kindahl, Lars Thalmann

By Charles Bell, Mats Kindahl, Lars Thalmann

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Server bottlenecks and screw ups are a truth of lifestyles in any database deployment, yet they don't need to convey every little thing to a halt. MySQL has a number of good points which could assist you safeguard your procedure from outages, no matter if it's operating on undefined, digital machines, or within the cloud. MySQL excessive Availability explains how one can use those replication, cluster, and tracking positive aspects in quite a lot of real-life events.

Written through engineers who designed the various instruments lined inside of, this publication finds undocumented or hard-to-find elements of MySQL reliability and excessive availability -- wisdom that’s crucial for any association utilizing this database procedure.
* discover the binary log, a dossier for replication that is helping in catastrophe restoration and troubleshooting
* Get concepts for making improvements to reaction time and dealing with huge info units
* visual display unit database job and function, in addition to significant working approach parameters
* retain music of what masters and slaves are doing, and take care of mess ups and restarts, corruption, and different incidents
* Automate key initiatives with code from an open resource library written by way of the authors
* study thoughts for utilizing MySQL in virtualized environments, akin to Amazon net prone
* Use MySQL Cluster to accomplish excessive availability
"MySQL replication is commonly deployed yet hasn't ever been properly defined. This publication alterations that." -- Mark Callaghan, MySQL contributor and chief of MySQL engineering efforts at some of the world's greatest web businesses

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1. Explain why concurrency models (like state machines or process algebras) are helpful in designing concurrent systems. When might a concurrency model prove awkward or difficult to use in designing systems? 2. Draw a state machine for a simple petrol pump. A pump is either idle, ready, or pumping petrol. Pumping commences when the handle on the nozzle of the pump is squeezed, and stops when the handle is released. When the nozzle is removed from the pump itself, it is ready to be used. When the nozzle is hung up on the pump, the pump is considered to be idle.

Objects are described in a standard way, and this standard interface is made available for other services and programmers to find and use. – The UDDI registry is based on XML, a standard markup language that is at the heart of web service systems. – A standard set of protocols, SOAP, is used for interacting within the UDDI. These protocols are XML-based and sit above TCP/IP. The main difference between UDDI and general-purpose name services is the degree of precision that is needed and can be obtained with UDDI.

Response: a response failure (or commission failure) is related to omission failures; a response is received to a request, but it is incorrect. For example, a request to add a book to a shopping cart in an online store, which results in the wrong book being added, would be a response failure. 28 2. 2 Responding to failure Ideally, we would like to build a system that is reliable (and satisfies its specification) from the start. Using good software engineering practices, such as focusing on simple designs, eliminating redundant code, using modular designs, and frequent testing, will go a long way towards this.

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