Articles about data science, data engineering, system design, cloud computing, and more.https://srcecde.me/en-ushttps://srcecde.me/posts/claude-code-ollama-open-source-free/https://srcecde.me/posts/claude-code-ollama-open-source-free/Run Claude Code with open source models via Ollama - completely free, private, and offline. Includes context window testing and setup guide.Tue, 27 Jan 2026 00:00:00 GMTclaude codeollamaopen sourceLLMlocal LLMqwentutorialAI codingai-mlChirag (Srce Cde)https://srcecde.me/posts/what-is-a-vector-space-in-machine-learning/https://srcecde.me/posts/what-is-a-vector-space-in-machine-learning/Understand vector spaces in machine learning with clear math definitions and a memorable kitchen analogy. Learn what qualifies as a vector space and what doesn't.Mon, 05 Jan 2026 00:00:00 GMTdata sciencemachine learningmathai-mlChirag (Srce Cde)https://srcecde.me/posts/similar-product-search-s3-vector-buckets-image-text-rrf/https://srcecde.me/posts/similar-product-search-s3-vector-buckets-image-text-rrf/Build product search with Amazon S3 Vector Buckets. A hands-on tutorial covering image and text similarity search, embeddings, and RRF multimodal fusion.Sun, 03 Aug 2025 00:00:00 GMTdata sciencedistancemetricsvector searchsearchai-mlChirag (Srce Cde)https://srcecde.me/posts/taxicab-manhattan-eucledian-distance-math-intuition/https://srcecde.me/posts/taxicab-manhattan-eucledian-distance-math-intuition/Learn Manhattan (L1) and Euclidean (L2) distance with step-by-step math, visual examples, and practical guidance on when to use each in machine learning.Mon, 19 Aug 2024 00:00:00 GMTdata sciencedistancemetricseucledianmanhattan distanceai-mlChirag (Srce Cde)https://srcecde.me/posts/2024/02/asterisk-and-forward-slash-as-function-parameters-python/https://srcecde.me/posts/2024/02/asterisk-and-forward-slash-as-function-parameters-python/Learn how asterisk (*) and forward slash (/) work in Python function parameters. Covers *args, **kwargs, positional-only, and keyword-only arguments with examples.Sat, 17 Feb 2024 00:00:00 GMTpythonprogrammingengineeringChirag (Srce Cde)https://srcecde.me/posts/2023/10/hands-on-aws-lambda-function-url-with-aws-iam-authentication-type/https://srcecde.me/posts/2023/10/hands-on-aws-lambda-function-url-with-aws-iam-authentication-type/Secure AWS Lambda function URLs with IAM authentication. Restrict access to authenticated IAM users and roles with step-by-step hands-on guide.Tue, 31 Oct 2023 00:00:00 GMTawsaws lambdaauthenticationserverlesscloud-infraChirag (Srce Cde)https://srcecde.me/posts/2023/10/pixel-vs-path-comparing-raster-and-vector-images/https://srcecde.me/posts/2023/10/pixel-vs-path-comparing-raster-and-vector-images/Understand the difference between raster and vector images. Compare pixel-based bitmaps with path-based vectors for design and image processing.Wed, 25 Oct 2023 00:00:00 GMTdata scienceimage processingcomputer visionraster vs vectorimageai-mlChirag (Srce Cde)https://srcecde.me/posts/2023/09/essence-of-digital-images-building-blocks/https://srcecde.me/posts/2023/09/essence-of-digital-images-building-blocks/Explore digital image fundamentals: pixels, color spaces, bit depth, and compression. Understand how images are represented as data structures.Sun, 17 Sep 2023 00:00:00 GMTdata scienceimage processingcomputer visionaiimageai-mlChirag (Srce Cde)https://srcecde.me/posts/2023/01/aws-glue-custom-classifier-grok-tutorial/https://srcecde.me/posts/2023/01/aws-glue-custom-classifier-grok-tutorial/Create AWS Glue custom classifiers using Grok patterns. Catalog data correctly when built-in classifiers fail to parse the schema structure.Mon, 02 Jan 2023 00:00:00 GMTawsaws glueserverlessgrokcloud-infraChirag (Srce Cde)https://srcecde.me/posts/2022/12/automatically-stop-ec2-instances-over-the-weekend/https://srcecde.me/posts/2022/12/automatically-stop-ec2-instances-over-the-weekend/Save AWS costs by automatically stopping EC2 instances on weekends. Use Lambda and EventBridge to schedule instance start and stop.Wed, 14 Dec 2022 00:00:00 GMTawsec2automationcloud computingcloud-infraChirag (Srce Cde)https://srcecde.me/posts/2022/11/how-to-get-alert-when-any-user-login-into-aws-console/https://srcecde.me/posts/2022/11/how-to-get-alert-when-any-user-login-into-aws-console/Get email alerts when users login to AWS console. Use CloudTrail, EventBridge, and SNS to monitor login events, especially for root account.Tue, 01 Nov 2022 00:00:00 GMTawscloudtrailserverlesseventbridgecloud-infraChirag (Srce Cde)https://srcecde.me/posts/2022/09/select-from-s3-query-data-via-s3-select/https://srcecde.me/posts/2022/09/select-from-s3-query-data-via-s3-select/Query S3 data using SQL with S3 Select. Filter CSV, JSON, or Parquet files directly in S3 to reduce data transfer costs and retrieval time.Mon, 12 Sep 2022 00:00:00 GMTawss3s3 selectserverlesssqlcloud-infraChirag (Srce Cde)https://srcecde.me/posts/2022/09/mount-azure-blob-storage-as-file-system-on-docker-container/https://srcecde.me/posts/2022/09/mount-azure-blob-storage-as-file-system-on-docker-container/Mount Azure Blob Storage as a file system on Docker containers using BlobFuse. Access blob data from Linux filesystem in containerized apps.Sat, 10 Sep 2022 00:00:00 GMTazureblob storageazure blogvirtual machinecloud-infraChirag (Srce Cde)https://srcecde.me/posts/2022/09/mount-azure-file-storage-as-volume-on-docker-container-in-virtual/https://srcecde.me/posts/2022/09/mount-azure-file-storage-as-volume-on-docker-container-in-virtual/Mount Azure File Storage as a Docker volume on Azure VMs. Persist container data by reading and writing to cloud storage.Sat, 03 Sep 2022 00:00:00 GMTazuredockerazure file storagecontainerscloud-infraChirag (Srce Cde)https://srcecde.me/posts/2022/08/aws-glue-tutorial-csv-to-parquet-transformation-end-to-end/https://srcecde.me/posts/2022/08/aws-glue-tutorial-csv-to-parquet-transformation-end-to-end/Transform CSV to Parquet using AWS Glue. End-to-end tutorial covering crawlers, Data Catalog, and ETL jobs for serverless data transformation.Tue, 30 Aug 2022 00:00:00 GMTawsaws glueetls3cloud-infraChirag (Srce Cde)https://srcecde.me/posts/2022/08/remote-development-with-visual-studio-code-and-ec2/https://srcecde.me/posts/2022/08/remote-development-with-visual-studio-code-and-ec2/Set up remote development with VS Code and EC2. Connect your local IDE to an EC2 instance via SSH for cloud-based development with full IDE features.Sat, 20 Aug 2022 00:00:00 GMTec2vscoderemote developmentprogrammingengineeringChirag (Srce Cde)https://srcecde.me/posts/2022/07/whitelist-ip-addresses-to-access-the-static-site-hosted-on-s3/https://srcecde.me/posts/2022/07/whitelist-ip-addresses-to-access-the-static-site-hosted-on-s3/Restrict access to S3-hosted static websites by IP address. Use bucket policy to whitelist specific IPs and block unauthorized traffic.Wed, 13 Jul 2022 00:00:00 GMTaws s3awsserverlessstatic sitecloud-infraChirag (Srce Cde)https://srcecde.me/posts/2022/07/send-notification-based-on-cloudwatch-logs-filter-patterns/https://srcecde.me/posts/2022/07/send-notification-based-on-cloudwatch-logs-filter-patterns/Get email alerts when errors appear in CloudWatch logs. Use subscription filters with SNS to monitor Lambda functions for keywords and errors.Wed, 06 Jul 2022 00:00:00 GMTaws lambdaawsserverlesssqscloud-infraChirag (Srce Cde)https://srcecde.me/posts/2022/06/whitelist-ip-addresses-for-lambda-function-urls/https://srcecde.me/posts/2022/06/whitelist-ip-addresses-for-lambda-function-urls/Whitelist IP addresses for AWS Lambda function URLs. Add IP validation in your code to allow specific IPs and block unauthorized requests.Sun, 19 Jun 2022 00:00:00 GMTaws lambdaawsserverlesscloud-infraChirag (Srce Cde)https://srcecde.me/posts/2022/06/how-to-whitelist-ip-addresses-in-amazon-http-api/https://srcecde.me/posts/2022/06/how-to-whitelist-ip-addresses-in-amazon-http-api/Whitelist IP addresses in Amazon HTTP API using Lambda Authorizers. Control traffic when Resource Policy is not available for HTTP API Gateway.Sun, 12 Jun 2022 00:00:00 GMTapiawsapi gatewayserverlesscloud-infraChirag (Srce Cde)https://srcecde.me/posts/2022/06/how-to-map-static-outbound-ip-with-the-aws-lambda-function/https://srcecde.me/posts/2022/06/how-to-map-static-outbound-ip-with-the-aws-lambda-function/Map a static outbound IP to AWS Lambda using Elastic IP, VPC, and NAT Gateway. Essential when external APIs require whitelisted source IPs.Mon, 06 Jun 2022 00:00:00 GMTlambdaawsstatic ipserverlesscloud-infraChirag (Srce Cde)https://srcecde.me/posts/2022/05/allow-access-to-api-gateway-from-specific-ip-addresses-whitelist-ips/https://srcecde.me/posts/2022/05/allow-access-to-api-gateway-from-specific-ip-addresses-whitelist-ips/Whitelist IP addresses for AWS REST API Gateway endpoints. Use Resource Policy to allow specific IPs and block all other incoming requests.Mon, 30 May 2022 00:00:00 GMTapi gatewayawsrest apisecuritycloud-infraChirag (Srce Cde)https://srcecde.me/posts/2022/02/automate-tasks-with-sms-via-amazon-pinpoint/https://srcecde.me/posts/2022/02/automate-tasks-with-sms-via-amazon-pinpoint/Automate tasks using two-way SMS with Amazon Pinpoint. Set up long codes, configure SNS triggers, and process incoming SMS messages with Lambda.Thu, 03 Feb 2022 00:00:00 GMTautomationawsamazon pinpointcloud computingcloud-infraChirag (Srce Cde)https://srcecde.me/posts/2022/01/aws-lambda-layer-building-made-easy/https://srcecde.me/posts/2022/01/aws-lambda-layer-building-made-easy/Build AWS Lambda layers with a single command using Docker. Skip manual EC2 setup and automate layer creation, configuration, and publishing.Mon, 24 Jan 2022 00:00:00 GMTaws lambda layerawsserverlesscloud computingcloud-infraChirag (Srce Cde)https://srcecde.me/posts/2021/12/handle-sqs-message-failure-in-batch-with-partial-batch-response/https://srcecde.me/posts/2021/12/handle-sqs-message-failure-in-batch-with-partial-batch-response/Handle SQS message failures gracefully with AWS Lambda partial batch response. Learn to process batches without reprocessing already successful messages.Sun, 12 Dec 2021 00:00:00 GMTsqsawsserverlesssqs lambdacloud-infraChirag (Srce Cde)https://srcecde.me/posts/2021/12/opencv-with-aws-lambda-via-layers/https://srcecde.me/posts/2021/12/opencv-with-aws-lambda-via-layers/Set up OpenCV on AWS Lambda using layers. Step-by-step guide to create, configure, and deploy opencv-python-headless for serverless image processing.Sat, 04 Dec 2021 00:00:00 GMTopencvlambdaaws lambda layerserverlessimage processingcloud-infraChirag (Srce Cde)https://srcecde.me/posts/2021/11/mlops-explained/https://srcecde.me/posts/2021/11/mlops-explained/What is MLOps and why do you need it? Learn how Machine Learning Operations extends DevOps for model versioning, continuous training, and ML lifecycle management.Tue, 16 Nov 2021 00:00:00 GMTmlopsmachine learningaidata scienceai-mlChirag (Srce Cde)https://srcecde.me/posts/2021/08/avoid-writing-expensive-code-in-python-with-memoization/https://srcecde.me/posts/2021/08/avoid-writing-expensive-code-in-python-with-memoization/Speed up Python programs with memoization. Learn to cache function results using decorators to avoid expensive repeated computations, with Fibonacci examples.Fri, 13 Aug 2021 00:00:00 GMTpythoncachememoizationfunctional programmingengineeringChirag (Srce Cde)https://srcecde.me/posts/2021/07/image-kernels/https://srcecde.me/posts/2021/07/image-kernels/Understand image kernels and convolution matrices for image processing. Learn how kernels work for blurring, sharpening, and edge detection with visual examples.Fri, 02 Jul 2021 00:00:00 GMTcomputer visionimage processingopencvai-mlChirag (Srce Cde)https://srcecde.me/posts/2021/02/copy-file-directory-to-from-ec2-using-scp-secure-copy/https://srcecde.me/posts/2021/02/copy-file-directory-to-from-ec2-using-scp-secure-copy/Transfer files to and from EC2 instances using SCP (Secure Copy Protocol). Quick commands for copying files and directories with your .pem identity file.Wed, 17 Feb 2021 00:00:00 GMTscpec2 instancesecure copyawscloud-infraChirag (Srce Cde)https://srcecde.me/posts/2020/11/how-to-read-pdf-s3-lambda-trigger/https://srcecde.me/posts/2020/11/how-to-read-pdf-s3-lambda-trigger/Read PDF files from S3 using AWS Lambda. Step-by-step tutorial covering Lambda layers setup, EC2 configuration, and S3 trigger integration.Fri, 13 Nov 2020 00:00:00 GMTawsaws lambdaaws ec2aws s3lambdacloud-infraChirag (Srce Cde)https://srcecde.me/posts/2020/11/loading-isplaying-saving-images/https://srcecde.me/posts/2020/11/loading-isplaying-saving-images/Loading, Displaying & Saving images using OpenCVThu, 05 Nov 2020 00:00:00 GMTopencvopencv pythoncomputer visionai-mlChirag (Srce Cde)