Most recently,my server was migrated to AlmaLinux 10 from CentOS 7,and it was found that there is no Redis available,but ValKey is available instead.It felt strange that Redis was replaced by Valkey,and I had to use it.Valkey is an open-source,high-perform...
We started with a straightforward-sounding problem: take live video streams delivered over HLS and DASH,and extract meaningful context in near real time.Map each moment to a standard content taxonomy so that ad decisioning has something useful to work with...
While both Redis and Memcached are powerful,open-source,in-memory data stores,their architectural philosophies differ significantly.Understanding why major tech companies (such as Netflix,Uber,Twitter,and Airbnb) overwhelmingly favor Redis requires a deep ...
1.The Problem: Hotspots Created by Viral PostsA service that ran perfectly fine on most days would slow to a crawl — and sometimes the database would freeze entirely — the moment traffic converged on a single influencer’s post or an event-driven piece o...
If you have both PHP 7.4 and PHP 8.1 installed on CentOS 7,but you're unsure where PHP 8.1 is located (e.g.for CLI use or configuring services),you can locate it with the following steps: .1.Check Current PHP Version .2.Install EPEL and Remi Repositories 3...
Below is from Alex Xu.The Data Engineering RoadmapData engineering has become the backbone of effective data analysis.It involves managing,processing,and optimizing data to derive actionable insights.Here’s a roadmap that can help you get better at data e...
A queue is a linear data structure that follows the First-In,First-Out (FIFO) principle.Elements are added to the rear (enqueue operation) and removed from the front (dequeue operation).This ensures that the element that has been waiting the longest is pro...
A six-layer production architecture designed to ingest raw video streams and files,extract multimodal semantic insights,enforce brand safety and regulatory compliance,and output structured,ad-targetable metadata in sub-hundred-millisecond response windows....
GraphQL offers several advantages over REST APIs,including fetching only the data a client needs,reducing over-fetching and under-fetching issues prevalent in REST.This leads to improved performance,especially on mobile devices with limited bandwidth.Graph...
Implementing APIs can present a variety of challenges across different phases of the development lifecycle.Here's a breakdown of common test challenges:1.Design and Planning Phase::Defining Clear Requirements: Ambiguous or poorly defined requirements lead ...
Apache Kafka is a distributed,fault-tolerant,high-throughput streaming platform.Think of it as a central nervous system for your data,reliably handling real-time data feeds. Core Concepts:Producers: Applications that write (publish) data to Kafka topics.Co...
How do you create EC2 Spot InstanceA Python script to create an EC2 Spot instance using boto3.The script launches a spot instance based on an AMI,associates it with a specific security group in a given VPC,and assigns custom tags for easy identification.Pr...
Installing Python 3.8 in a venv environment on CentOS 7 requires several steps.Follow the guide below:1.Update System PackagesFirst,ensure your system is up-to-date:2.Install Development Tools and DependenciesInstall the required tools and libraries for bu...
MLOps (Machine Learning Operations)MLOps is a set of practices that aims to deploy and maintain machine learning models in production reliably and efficiently.It bridges the gap between machine learning development (ML Dev) and operations (Ops),similar to ...
Brand safety—preventing ads from appearing next to inappropriate,offensive,or illegal content—is a critical advertiser concern.A family-oriented brand (Disney,Nestle,American Express) will not tolerate ads appearing on pages containing violence,hate spee...
A hot shard is a database partition that receives disproportionately high load due to skewed traffic patterns.In ad tech,this occurs when a few large advertisers or campaigns dominate traffic.A single popular advertiser might generate 10% of all impression...
Setting up an Amazon Web Services (AWS) Elastic Container Service (ECS) involves several steps to deploy containerized applications in a scalable and managed environment.AWS ECS supports Docker containers and allows you to run applications on a managed clu...
Have you ever wanted to streamline how you develop and deploy applications? Amazon Elastic Container Service (ECS) could be the game-changer you're looking for.This service allows developers to manage Docker containers on a highly scalable and secure platf...
To set up an SMTP server on CentOS 7, you can use a popular mail server software called Postfix. Here are the steps to install and configure Postfix:1. Update System: Make sure your system is up-to-date by running the following commands:2. Install Postfix:...
Ad detection from a video stream involves identifying and segmenting promotional content within a larger video sequence.This process is crucial for various applications,including content monitoring,ad verification,automated content moderation,enhancing use...
In a relational database,a "Table" stores structured data rows and columns.In a vector database,its equivalent is a "Collection," which stores vector embeddings along with optional metadata.Vector databases often leverage multiple collections to perform co...
To optimize the performance of a high-traffic search results page,the primary focus must be on minimizing latency and maximizing system scalability to ensure a seamless,uninterrupted user experience under heavy load.The ultimate goal is to deliver highly r...
You should check incomplete multipart uploads if your Metrics in the S3 Management Console shows larger size than you actually use. In my case,I found the total size of S3 bucket was 180TB,but actually size I uploaded based on the origin storage was 40TB.I...
If you've heard of uvicorn,you know Docker.If you've heard of gunicorn,you've served at a production level.Do you agree?. uvicorn vs.gunicorn: The Core Difference:uvicorn: An HTTP server primarily designed for Ruby applications (using the Rack interface).I...
Batch processing on AWS allows for the on-demand provisioning of a multi-part job processing architecture that can be used for instantaneous or delayed deployment of a heterogeneous,scalable "grid" of worker nodes that can quickly crunch through large batc...
What is a Stateful Database?A stateful database is a type of database system that retains information about past interactions or states and uses this information to process subsequent requests.In essence,it remembers the "state" of the data over time.This ...
System Architecture OverviewTo handle 100,000+ Transactions Per Second (TPS) for order inquiries,the system must decouple write operations from read operations.A traditional relational database (RDBMS) cannot handle this scale of read traffic directly.This...
If you have an Amazon Web Service (AWS) Acount, you can get Access Key as below. [Account] –> [Security Credentials] –> [Access Credentials] For security reason, Access Key should NOT be shared with anyone.