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Dec 17, 2024 · 7 min read · Scenario: Diagnosing Disk I/O Latency You suspect that a disk is experiencing high latency during peak traffic. To monitor real-time disk performance, you run: iostat -y -x 5 3 Output: avg-cpu: %user %nice %system %iowait %steal %idle ...
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Dec 17, 2024 · 4 min read · What Happens When You malloc 2 GB but Don’t Use It? malloc reserves virtual memory, not physical memory: When you call malloc(2GB), the operating system reserves 2 GB of address space for your process in the virtual memory. No physical RAM is allo...
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Nov 23, 2024 · 5 min read · Building and maintaining consistent infrastructure across multiple environments and platforms has historically been a daunting challenge. Enter Packer, a game-changer developed by HashiCorp. This open-source tool automates the creation of machine ima...
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Nov 23, 2024 · 2 min read · What is Packer? Packer is an open-source tool created by HashiCorp for building identical machine images for multiple platforms from a single source configuration. It automates the process of creating machine images, eliminating manual steps and ensu...
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Nov 23, 2024 · 2 min read · Packer Fundamentals This briefing document reviews key concepts and insights of HashiCorp Packer, a tool for creating machine images. 1. Interacting with Packer The primary and sole method of interacting with Packer is through its command-line interf...
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