Why Node JS cluster is important?
How to create Node JS cluster application?
Using PM2 to run Node JS application
Communication between Master process and Child Process
Communication between Master process and Child Process using PM2 and RabbitMQ
Working with Redis cache
Using Nginx as a reverse proxy and load balancer
At the end of this course, you will be ready to use Node JS cluster with PM2, RabbitMQ, Redis and Nginx.
Our Redis™ customers who have Lua scripts deployed often report this error – “BUSY Redis is busy running a script. You can only call SCRIPT KILL or SHUTDOWN NOSAVE”. In this post, we will explain the Redis transactional property of scripts, what this error is about, and why we must be extra careful about it on Sentinel-managed systems that can failover.
Redis “transactions” aren’t really transactions as understood conventionally – in case of errors, there is no rollback of writes made by the script.
“Atomicity” of Redis scripts is guaranteed in the following manner:
It is highly recommended that the script complete within a time limit. Redis enforces this in a weak manner with the ‘lua-time-limit’ value. This is the maximum allowed time (in ms) that the script is allowed to run. The default value is 5 seconds. This is a really long time for CPU-bound activity (scripts have limited access and can’t run commands that access the disk).
However, the script is not killed when it executes beyond this time. Redis starts accepting client commands again, but responds to them with a BUSY error.
If you must kill the script at this point, there are two options available:
It is usually better to just wait for the script to complete its operation. The complete information on methods to kill the script execution and related behavior are available in the documentation.
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In this tutorial, you will learn how to install Node onto Ubuntu 19.04 Disco Dingo. We will cover installation from the default repositories and, for those wanting more recent releases, how to install from the NodeSource repositories.
Installing from Ubuntu
The Ubuntu 19.04 Disco Dingo repository includes NodeJS version 10.15. Like most packages found here, it certainly is not the most recent release; however, if stability is more important than features, it will be your preferred choice.
#nodejs #nodejs 10.x #nodejs 11.x #nodejs 12.x #nodejs 8.x
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Here, I will show you how to create full text search in laravel app. You just follow the below easy steps and create full text search with mysql db in laravel.
Let’s start laravel full-text search implementation in laravel 7, 6 versions:
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