0 views collected around this technical thread.
This article explains what disks are, compares mechanical HDDs and SSDs, outlines disk classification by interface and architecture, defines key I/O performance metrics such as IOPS, throughput, utilization, and latency, and introduces Linux tools like iostat, iotop, and sar for monitoring and analysis.
This article provides two Bash scripts: one that continuously displays inbound and outbound traffic of a specified network interface, and another that remotely checks disk usage on up to 100 servers, issuing warnings when partitions exceed a defined threshold.
Redis is exploring a disk‑backed tiered storage architecture, allowing infrequently used data to move from memory to flash and back, a move aimed at reducing costs, improving scalability, and expanding its popularity among developers and gaming applications.
This article explains the different server storage types—including mechanical HDDs, solid‑state SSDs, various interfaces, RAID arrays, and network‑attached storage—while covering their structures, performance characteristics, Linux device handling, and how to choose the right solution based on cost, capacity, speed, and reliability.
This article explains the physical and logical operation of mechanical hard drives and solid‑state drives, details the Ext4 filesystem structures such as superblocks, inodes, block groups, flexible and meta block groups, and outlines allocation strategies and link types.
This guide explains how to use Prometheus' irate function and Grafana to calculate and visualize CPU, memory, and disk usage percentages for each host, including the necessary PromQL queries and formulas in a monitoring setup.
The article explains common storage I/O characteristics—such as I/O size, read/write ratio, sequential versus random access, locality, stability, and multithreading—across various application workloads and shows how tools like Iometer can be used to model and benchmark these patterns.
This article provides a comprehensive overview of server hardware fundamentals, covering server form factors, motherboard architecture, selection criteria, major vendors, CPU concepts and performance, NUMA, memory specifications, disk throughput and IOPS, as well as network card types and bonding modes.
This article explains the physical makeup of mechanical hard drives—including platters, heads, tracks, cylinders and sectors—shows how to view disk details with Linux commands like lsblk and fdisk, and clarifies common misconceptions about heads, cylinders and sector sizes.
This article compiles ten common Linux operational problems—from shell script failures and cron output issues to disk space exhaustion and MySQL errors—detailing their causes and step‑by‑step solutions to help sysadmins quickly diagnose and resolve system faults.
This article explains the principles of caching, compares memory and disk storage, demonstrates several iOS persistence methods, and details how YYCache combines memory and disk layers with LRU optimization and network synchronization to improve performance in a real‑world mobile app.
This article translates hardware latencies—from CPU cache and memory to disk and network—into human‑scale time equivalents, using vivid analogies and benchmark data to illustrate why storage and networking appear extremely slow from the processor's viewpoint.