ACID principles Atomicity Definition: A transaction is an all-or-nothing operation. Either every step in the transaction is completed successfully, or none of it happens. example: Bank Transfer: When transferring $100 from Account A to Account B, either:$100 is deducted from…
SOLID principles This is more interview based concept if you are backend developer this is obvious to ask. S: Single Responsibility Principle (SRP) • Each part of your code should have one job. • Makes code easier to read and…
What is an Nginx reverse proxy? Most enterprise architectures use a single, reverse proxy server to handle all incoming requests. The proxy server then inspects each HTTP request and identifies which backend system, be it an Apache, Tomcat, Express or…
A proxy_pass is usually used when there is an nginx instance that handles many things, and delegates some of those requests to other servers. Some examples are ingress in a Kubernetes cluster that spreads requests among the different microservices that are responsible…
Check all running services service –status-all
1. 𝐒𝐜𝐚𝐥𝐚𝐛𝐢𝐥𝐢𝐭𝐲 𝐯𝐬. 𝐏𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞: Grow the system to handle more work vs. execute tasks faster. 2. 𝐕𝐞𝐫𝐭𝐢𝐜𝐚𝐥 𝐯𝐬. 𝐇𝐨𝐫𝐢𝐳𝐨𝐧𝐭𝐚𝐥 𝐒𝐜𝐚𝐥𝐢𝐧𝐠: Scale up with more powerful hardware vs. scale out by adding more servers. 3. 𝐋𝐚𝐭𝐞𝐧𝐜𝐲 𝐯𝐬. 𝐓𝐡𝐫𝐨𝐮𝐠𝐡𝐩𝐮𝐭: Prioritize fast responses…
Install ntfs-3g first sudo apt-get install ntfs-3g ntfs-config Check partition uuid and dev id sudo blkid output: /dev/sda7: LABEL=”PROJECTS” UUID=”A82A91682A913472″ TYPE=”ntfs” PARTLABEL=”Basic data partition” PARTUUID=”bd3713fd-2717-4957-b516-dd31c67702ef” /dev/sda8: LABEL=”WEBSOFT” UUID=”2E70988670985685″ TYPE=”ntfs” PARTLABEL=”Basic data partition” PARTUUID=”09e25678-fe8f-42c8-bc4d-866789efe0b6″ /dev/sda9: LABEL=”FOUNDATION” UUID=”4AA6A537A6A52503″ TYPE=”ntfs” PARTLABEL=”Basic data partition”…
Install PHP Rdkafka extension user default system on linux On Debian and Ubuntu, install librdkafka from the Confluent APT repositories, see instructions here and then install librdkafka: $ apt install librdkafka-dev On RedHat, CentOS, Fedora, install librdkafka from the Confluent YUM repositories,…
লোড ব্যালেন্সিং কি ? একটি ওয়েবসাইট বা ওয়েব সার্ভিসকে প্রোডাকশন লেভেলে নিয়ে যাওয়ার জন্য এর নিজেরই হাজারটা চ্যালেন্জ রয়েছে। সেগুলো পার করে যখন একটা ভাল মার্কেট পেয়ে যান তখন সেটা আপনার জন্য একটা বড় পাওয়া। আপনার সিস্টেমের ব্যবহারকারী দিন দিন…
Tecognize Training May 16 at 7:00 PM · আজকের ব্লগে মূলত Database partitioning এর উপরে একটা ওভারভিউ দেয়ার চেষ্টা করব। তবে তার আগে Database scaling কি, কেন করি, কিভাবে করি এবং সেইসাথে Database replication এবং Database partitioning এর উপরে কিছু তফাৎ আমরা দেখার চেষ্টা করব।…
“Java brains” youtube channel “learn code with durgesh” youtube Dev Rezaurl – https://www.youtube.com/channel/UCK-YZ99fTsn4jOuZTGUaDzQ
Here is what I did to complete the install: Find a .nbi folder under C:\Users\folder. This folder has .nbi folder under it Open a command prompt and Go to NetBeans folder which has uninstall.exe Run this command in the command prompt:.\uninstall.exe –userdir c:\Users\folder\\.nbi folder is the folder you found…
Helper Function # app_path() $path = app_path(); $path = app_path(‘Http/Controllers/Controller.php’); # base_path() $path = base_path(); $path = base_path(‘vendor/bin’); # config_path() $path = config_path(); $path = config_path(‘app.php’); # database_path() $path = database_path(); $path = database_path(‘factories/UserFactory.php’); # mix() $path = mix(‘css/app.css’); #…
AWS Certified Solutions Architect Associate SAA-C02 Course Outline Introduction: Introduction and Overview ● The exam blueprint Why Should I Learn and Get Certified with AWS? AWS – 10,000-Foot Overview The History of AWS So Far AWS –…
A beginner friendly material to start with. These resources can be used as training material for freshers. Core Java Chapter 0 : Fundamentals Data Types and Variables – https://www.baeldung.com/java-primitives Access Modifiers – https://www.baeldung.com/java-access-modifiers If-Else https://www.baeldung.com/java-control-structures https://www.baeldung.com/java-using-not-in-if-conditions Switch Case – https://www.baeldung.com/java-switch Loops – https://www.baeldung.com/java-loops OOP…