In-depth technical articles, high-load system architecture analyses, and practical digital transformation strategies shared directly by Sudo’s engineers and solutions architects.
The Proxy pattern puts a stand-in object in front of the real one, with the same interface, to control access: intercepting calls, logging, caching, checking permissions, or delaying initialization. I...
A fraud-detection model with 99.13% accuracy sounds impressive, until you learn that a program that prints "not fraud" for every transaction scores 99.12%. That is why model evaluation for classifiers...
In a multi-site model on Cloud VPS, every site runs over HTTPS and the certificates live on the balancer tier. With hundreds of domains and Let's Encrypt certificates that only last 90 days, renewing...
PHP 7.4 is the last branch of PHP 7, and its security support ended in late 2022. On many Cloud VPS clusters it still runs a fair number of websites, alongside a group of even older sites on PHP 7.2,...
In the database tier of a multi-website setup on Cloud VPS, each server typically runs one MySQL 8.0 instance holding dozens of schemas for dozens of different websites. The server has only a few GB o...
A single Cloud VPS cluster typically holds legacy websites that only run on PHP 7.2, new Laravel sites that need PHP 8.x, and many sites in between on PHP 7.4. Upgrading everything to one version is n...
If you have ever standardized a whole table before splitting it into train and test sets, picked hyperparameters by watching the score on the test set, or forgotten to apply the right preprocessing wh...
In a multi-website setup on Cloud VPS, every request passes through one door: the balancer tier. These are the only servers with public IPs, and they run an Nginx reverse proxy that decrypts HTTPS, bl...
When a cluster has only a few servers, remembering each IP is easy. Once the count reaches a few dozen, spread across balancers, minions, database servers, build servers and monitoring servers, writin...
The Decorator pattern adds behavior to an object by wrapping it in another object that has the same interface, instead of creating a subclass for every combination of features. You probably use it eve...
With only a handful of websites, giving each site its own server is the simplest approach. Once you are running hundreds of sites, most of them PHP/Laravel and each needing a different PHP version, th...
Almost every modern machine learning model, from linear regression to neural networks with billions of parameters, is trained with the same idea: measure the error, compute the slope, take a small ste...
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