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This is a guest repost Przemek Sobstel, who believes that dogpile effect issue is not covered enough, especially in the PHP world. Orignal article: Preventing dogpile effect. The Dogpile effect occurs when cache expires and websites are hit by numerous requests the same time. From my own experiences working on
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Once upon a time a great Twitter melee was fought for the coveted title of Consensus Best Way to Structure Systems. The competition was between Microservices and Monolithic Apps. Flying the the logo of Microservices, from a distant cloud covered land, is the Kingdom of Netflix, whose champion was Sir
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While Ten Caching Mistakes that Break your App by Omar Al Zabir is a few years old, it is still a great source of advice on using caches, especially on the differences between using a local in-memory cache and when using a distributed cache. Here are the top 10 mistakes
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The title is a paraphrase of something Raymond Blum, who leads a team of Site Reliability Engineers at Google, said in his talk How Google Backs Up the Internet. I thought it a powerful enough idea that it should be pulled out on its own: Mr. Blum explained common backup
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This is a guest post by Aaron Sullivan, Director & Principal Engineer at Rackspace. We all love a silver bullet. Over the last few years, if I were to split the outcomes that I see with Rackspace customers who start using SSDs, the majority of the outcomes fall under two
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Arvid Norberg on the libtorrent blog has put together an excellent list of principles of high performance programs, obviously derived from hard won experience programming on bittorrent: Two fundamental causes of performance problems: 1. Memory Latency. A big performance problem on modern computers is the latency of SDRAM. The CPU
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After Google cut prices on their Google Cloud Platform Amazon quickly followed with their own price cuts. Even more interesting is what the future holds for pricing. The near future looks great. After that? We'll see. Adrian Cockcroft highlights that Google thinks prices should follow Moore’s law,
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This is a guest repost by Venkatesh CM at Architecture Issues Scaling Web Applications. I will cover architecture issues that show up while scaling and performance tuning large scale web application in this blog. Lets start by defining few terms to create common understanding and vocabulary. Later on I will
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Adrian Singer has boiled down 7 years of experience to a set of 10 very useful tips on how to best optimize NGINX and PHP-fpm for high traffic sites: 1. Switch from TCP to UNIX domain sockets. When communicating to processes on the same machine UNIX sockets have better performance
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How is it possible that a wooden Shinto shrine built in the 7th century is still standing? The answer depends on how you answer this philosophical head scratcher: With nearly every cell in your body continually being replaced, are you still the same person? The Ise Grand Shrine has been
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My favorite kind of histories are those told from an insider's perspective. The story of Richard the Lionheart is full of great battles and dynastic intrigue. The story of one of his soldiers, not so much. Yet the soldiers' story, as someone who has experienced the real
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Ever come to a point where you feel you've learned enough to share your experiences in the hopes of helping others traveling the same road? That's what Martin Kleppmann has done in an lovingly written Six things I wish we had known about scaling, an article