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Table of Contents LVM Overview Core Concepts Common Operations Disk Scanning Creating LVM Volumes Expanding Logical Volumes Shrinking Logical Volumes Swap Partition Expansion Command Reference LVM Overview LVM (Logical Volume Manager) is a storage device management technology that provides logical abstraction layer between physical storage de ...

Install System Dependencies Update the system and install required development libraries and tools: yum -y update yum -y install gcc openssl-devel zlib-devel readline-devel libffi-devel bzip2-devel mysql-devel python-devel java wget git redis nginx supervisor Enable services to start automatically after a reboot: syst ...

Prerequisites Log in to your CentOS 7 server using an account that has sudo privileges. Ensure that no other service (such as Apache) is occupying port 80 or 443, as this would prevent Nginx from starting. Installing Nginx Nginx is available from the EPEL (Extra Packages for Enterprise Linux) repository. Follow these steps to install it: Inst ...

Deployment Environment To establish a local Key Management Service (KMS) infrastructure, access to a Linux server with root privileges is required. This guide utilizes CentOS 7 x64 as the baseline environment. Ensure that network connectivity allows for downloading resources and that port 1688 (TCP/UDP) remains accessible for client connections ...

IP Address ClassificationIPv4 addresses are categorized into five classes (A through E), although D (multicast) and E (experimental) are rarely configured on standard hosts.Class A: The first octet represents the network (1-127). The loopback address consumes 127.0.0.0/8, leaving 126 valid networks. Each network supports 2^24 - 2 hosts. Default ...

While the standard Percona Monitoring Plugins provide a robust baseline, they often omit critical database performance indicators such as Queries Per Second (QPS), Transactions Per Second (TPS), and Input/Output Operations Per Second (IOPS). To maintain comprehensive observability, the monitoring configuration must be extended to include these ...

In Linux, there are several ways to execute commands that continue running even after you close your terminal session: Background execution with &: The ampersand symbol allows a command to run in the background. However, if you close your terminal (like Xshell), the process will terminate. nohup command: This allows a command to keep runni ...

System Account and SSH Automation Setup Establishing a dedicated service account with passwordless SSH access streamlines the deployment workflow for all cluster components. # Provision the deployment user and assign passwordless sudo rights sudo useradd -m -s /bin/bash ds_user echo "ds_user:SecurePass123" | sudo chpasswd sudo tee -a ...

Memory Units and General SettingsRedis configuration supports standard memory units. Units are case-insensitive, meaning 1GB, 1Gb, and 1gb are equivalent.1kb = 1024 bytes1k = 1000 bytes1mb = 1024*1024 bytes1m = 1000000 bytesBy default, Redis runs in the foreground. To run as a background daemon, modify the daemonize setting.daemonize yes pidfil ...

Creating a Bootable USB Drive Download the ISO from a local mirror, such as Alibaba Cloud, or the official site, wich automatically selects the fastest route. When using tools like UltraISO, select RAW mode for writing the image to avoid many common issues. Alternatively, write the USB on Linux: sudo dnf install -y epel-release ntfsprogs ntfs ...