Redis Installation and Configuration: Complete In-Memory Database Guide

Introduction

Redis (Remote Dictionary Server) is an open-source, in-memory data structure store that serves as a database, cache, message broker, and streaming engine. Since its introduction in 2009, Redis has become one of the most popular NoSQL databases and caching solutions, renowned for its exceptional performance, simplicity, and versatility.

Unlike traditional disk-based databases, Redis stores data primarily in memory, enabling sub-millisecond response times and supporting millions of requests per second. This makes it ideal for use cases requiring ultra-fast data access, including caching, session management, real-time analytics, message queues, and leaderboards.

Redis supports various data structures including strings, hashes, lists, sets, sorted sets, bitmaps, hyperloglogs, geospatial indexes, and streams, providing developers with powerful tools to solve complex problems efficiently.

This comprehensive guide covers Redis installation, configuration, security hardening, performance optimization, persistence options, and best practices for production environments across various Linux distributions.

Why Choose Redis?

Redis excels in several key areas:

Performance:

In-memory storage for microsecond latency
Single-threaded architecture eliminating context switching
Supports millions of operations per second
Pipelining for batch operations
Optimized data structures

Versatility:

Multiple data structures (strings, lists, sets, hashes, sorted sets)
Pub/Sub messaging for real-time communication
Lua scripting for complex operations
Geospatial operations
Streams for event sourcing

Reliability:

Persistence options (RDB snapshots, AOF logs)
Replication for high availability
Sentinel for automatic failover
Clustering for horizontal scaling
Transactions with MULTI/EXEC

Developer Experience:

Simple, intuitive commands
Rich client library support (Python, Node.js, Java, PHP, etc.)
Extensive documentation
Active community

Major organizations using Redis include Twitter, GitHub, Stack Overflow, Airbnb, and Uber.

Prerequisites

Before installing Redis, ensure your system meets these requirements:

System Requirements

Minimum Requirements:

Linux server (Ubuntu 20.04+, Debian 11+, CentOS 8+, Rocky Linux 8+)
Root or sudo access
1GB RAM minimum
5GB available disk space
64-bit architecture recommended

Recommended for Production:

4+ CPU cores
16GB+ RAM (depending on data size)
SSD storage
Dedicated server for Redis
Sufficient swap space configured

Prerequisites Check

# Check system architecture
uname -m

# Check available memory
free -h

# Check disk space
df -h

# Check Linux kernel version
uname -r

# Disable transparent huge pages (recommended)
cat /sys/kernel/mm/transparent_hugepage/enabled

Installation

Installing Redis on Ubuntu/Debian

Redis is available in default repositories:

# Update package index
sudo apt update

# Install Redis server
sudo apt install redis-server -y

# Verify installation
redis-server --version

# Check service status
sudo systemctl status redis-server

# Enable Redis to start on boot
sudo systemctl enable redis-server

Install latest stable version from official Redis repository:

# Add Redis repository
curl -fsSL https://packages.redis.io/gpg | sudo gpg --dearmor -o /usr/share/keyrings/redis-archive-keyring.gpg

echo "deb [signed-by=/usr/share/keyrings/redis-archive-keyring.gpg] https://packages.redis.io/deb $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/redis.list

# Update and install
sudo apt update
sudo apt install redis -y

Installing Redis on CentOS/Rocky Linux

For Red Hat-based distributions:

# Update system packages
sudo dnf update -y

# Install EPEL repository
sudo dnf install epel-release -y

# Install Redis
sudo dnf install redis -y

# Start Redis
sudo systemctl start redis

# Enable Redis to start on boot
sudo systemctl enable redis

# Verify installation
redis-server --version

# Check service status
sudo systemctl status redis

Install from Remi repository for latest version:

# Install Remi repository
sudo dnf install https://rpms.remirepo.net/enterprise/remi-release-9.rpm -y

# Enable Redis 7 module
sudo dnf module enable redis:remi-7.2 -y

# Install Redis
sudo dnf install redis -y

# Start and enable service
sudo systemctl start redis
sudo systemctl enable redis

Installing from Source

For the absolute latest version or custom compilation:

# Install build dependencies
# Ubuntu/Debian
sudo apt install build-essential tcl -y

# CentOS/Rocky
sudo dnf groupinstall 'Development Tools' -y
sudo dnf install tcl -y

# Download latest Redis
cd /tmp
wget https://download.redis.io/redis-stable.tar.gz

# Extract archive
tar -xzvf redis-stable.tar.gz
cd redis-stable

# Compile Redis
make

# Run tests (optional but recommended)
make test

# Install Redis
sudo make install

# Create Redis user
sudo useradd -r -s /bin/false redis

# Create directories
sudo mkdir -p /etc/redis
sudo mkdir -p /var/lib/redis
sudo mkdir -p /var/log/redis

# Copy configuration file
sudo cp redis.conf /etc/redis/redis.conf

# Set permissions
sudo chown -R redis:redis /var/lib/redis
sudo chown -R redis:redis /var/log/redis
sudo chown redis:redis /etc/redis/redis.conf

Create systemd service file:

sudo nano /etc/systemd/system/redis.service

Add content:

[Unit]
Description=Redis In-Memory Data Store
After=network.target

[Service]
Type=notify
User=redis
Group=redis
ExecStart=/usr/local/bin/redis-server /etc/redis/redis.conf
ExecStop=/usr/local/bin/redis-cli shutdown
Restart=always
RuntimeDirectory=redis
RuntimeDirectoryMode=0755

[Install]
WantedBy=multi-user.target

Start and enable service:

sudo systemctl daemon-reload
sudo systemctl start redis
sudo systemctl enable redis
sudo systemctl status redis

Verifying Installation

Confirm Redis is working properly:

# Check Redis version
redis-server --version
redis-cli --version

# Check service status
sudo systemctl status redis
# or
sudo systemctl status redis-server

# Check listening ports (default: 6379)
sudo ss -tulpn | grep 6379
sudo netstat -tulpn | grep 6379

# Test Redis connection
redis-cli ping
# Should return: PONG

# Get Redis information
redis-cli info

# Test basic operations
redis-cli set testkey "Hello Redis"
redis-cli get testkey
redis-cli del testkey

Directory Structure

Understanding Redis file locations:

Configuration:

Ubuntu/Debian: /etc/redis/redis.conf
CentOS/Rocky: /etc/redis.conf or /etc/redis/redis.conf

Data:

/var/lib/redis/ - Data directory

Logs:

/var/log/redis/redis-server.log - Log file

Binaries:

/usr/bin/redis-server - Redis server
/usr/bin/redis-cli - Redis command-line client
/usr/bin/redis-sentinel - Redis Sentinel

Initial Configuration

Understanding redis.conf

The main configuration file controls all Redis behavior:

# Edit configuration file
# Ubuntu/Debian
sudo nano /etc/redis/redis.conf

# CentOS/Rocky
sudo nano /etc/redis.conf

Key configuration sections:

# Network settings
bind 127.0.0.1 ::1
protected-mode yes
port 6379
tcp-backlog 511
timeout 0
tcp-keepalive 300

# General settings
daemonize yes
supervised systemd
pidfile /var/run/redis/redis-server.pid
loglevel notice
logfile /var/log/redis/redis-server.log
databases 16

# Snapshotting (RDB persistence)
save 900 1
save 300 10
save 60 10000
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
dbfilename dump.rdb
dir /var/lib/redis

# Replication
# replica-read-only yes

# Security
# requirepass your_password

# Memory management
maxmemory 256mb
maxmemory-policy allkeys-lru

# Append Only File (AOF persistence)
appendonly no
appendfilename "appendonly.aof"
appendfsync everysec
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb

Configuring Network Settings

By default, Redis only listens on localhost. For production:

# Listen only on localhost (most secure)
bind 127.0.0.1 ::1

# Listen on specific interface
bind 192.168.1.100

# Listen on all interfaces (use with caution)
bind 0.0.0.0

# Change default port (optional)
port 6379

# Enable protected mode (recommended)
protected-mode yes

Restart Redis after changes:

sudo systemctl restart redis
# or
sudo systemctl restart redis-server

# Verify configuration
redis-cli config get bind
redis-cli config get port

Setting Up Authentication

Always use password authentication in production:

Edit redis.conf:

# Set strong password
requirepass your_very_strong_password_here

# For Redis 6+, use ACLs for more granular control
# Create ACL user
# user default on >your_password ~* &* +@all

Restart Redis:

sudo systemctl restart redis

Connect with authentication:

# Method 1: Authenticate after connection
redis-cli
AUTH your_password

# Method 2: Authenticate during connection
redis-cli -a your_password

# Method 3: Use AUTH command
redis-cli
127.0.0.1:6379> AUTH your_password
OK
127.0.0.1:6379> ping
PONG

Redis 6+ ACL Configuration

Redis 6 introduced Access Control Lists for fine-grained permissions:

# Connect to Redis
redis-cli -a your_password

# Create read-only user
ACL SETUSER readonly on >readonly_password ~* +@read -@write -@dangerous

# Create read-write user for specific keys
ACL SETUSER appuser on >app_password ~app:* +@all

# Create admin user
ACL SETUSER admin on >admin_password ~* &* +@all

# List all users
ACL LIST

# Show current user
ACL WHOAMI

# Save ACL configuration
ACL SAVE

# View user permissions
ACL GETUSER username

Configure ACL in redis.conf:

# Enable ACL configuration file
aclfile /etc/redis/users.acl

Create users.acl file:

sudo nano /etc/redis/users.acl

Add users:

user default on >default_password ~* &* +@all
user readonly on >readonly_pass ~* +@read -@write -@dangerous
user appuser on >app_pass ~app:* +@all

Enabling Remote Access

To allow remote connections:

# Edit redis.conf
# Comment out or modify bind directive
bind 0.0.0.0

# Or bind to specific IPs
bind 127.0.0.1 192.168.1.100

# Ensure protected mode is on
protected-mode yes

# Require password
requirepass your_strong_password

Configure firewall:

# UFW (Ubuntu/Debian)
sudo ufw allow from 192.168.1.0/24 to any port 6379

# firewalld (CentOS/Rocky)
sudo firewall-cmd --permanent --add-rich-rule='rule family="ipv4" source address="192.168.1.0/24" port protocol="tcp" port="6379" accept'
sudo firewall-cmd --reload

Security Hardening

Firewall Configuration

Restrict Redis access to trusted sources:

# UFW rules
# Allow from specific IP
sudo ufw allow from 192.168.1.50 to any port 6379

# Allow from subnet
sudo ufw allow from 192.168.1.0/24 to any port 6379

# Check rules
sudo ufw status numbered

# firewalld rules
# Allow from specific IP
sudo firewall-cmd --permanent --add-rich-rule='rule family="ipv4" source address="192.168.1.50" port protocol="tcp" port="6379" accept'

# Allow from subnet
sudo firewall-cmd --permanent --add-rich-rule='rule family="ipv4" source address="192.168.1.0/24" port protocol="tcp" port="6379" accept'

# Reload firewall
sudo firewall-cmd --reload

Disabling Dangerous Commands

Rename or disable dangerous commands in redis.conf:

# Rename dangerous commands
rename-command FLUSHDB ""
rename-command FLUSHALL ""
rename-command KEYS ""
rename-command CONFIG "CONFIG_b89a7f6c3d"
rename-command DEBUG ""
rename-command SHUTDOWN "SHUTDOWN_d73h4g8k2l"

# Or rename to obscure names
rename-command FLUSHDB "FLUSH_a8f3k2n9p5"
rename-command CONFIG "CONFIG_z9x4c7v2b1"

SSL/TLS Encryption

Redis 6+ supports native TLS:

Generate certificates:

# Create directory
sudo mkdir -p /etc/redis/ssl
cd /etc/redis/ssl

# Generate CA key and certificate
sudo openssl genrsa -out ca-key.pem 4096
sudo openssl req -new -x509 -days 3650 -key ca-key.pem -out ca-cert.pem

# Generate server key and certificate
sudo openssl genrsa -out redis-server-key.pem 4096
sudo openssl req -new -key redis-server-key.pem -out redis-server.csr
sudo openssl x509 -req -days 3650 -in redis-server.csr -CA ca-cert.pem -CAkey ca-key.pem -CAcreateserial -out redis-server-cert.pem

# Generate client key and certificate
sudo openssl genrsa -out redis-client-key.pem 4096
sudo openssl req -new -key redis-client-key.pem -out redis-client.csr
sudo openssl x509 -req -days 3650 -in redis-client.csr -CA ca-cert.pem -CAkey ca-key.pem -CAcreateserial -out redis-client-cert.pem

# Set permissions
sudo chown redis:redis /etc/redis/ssl/*
sudo chmod 600 /etc/redis/ssl/*.pem

Configure TLS in redis.conf:

# TLS/SSL Configuration
port 0
tls-port 6379
tls-cert-file /etc/redis/ssl/redis-server-cert.pem
tls-key-file /etc/redis/ssl/redis-server-key.pem
tls-ca-cert-file /etc/redis/ssl/ca-cert.pem
tls-auth-clients yes
tls-protocols "TLSv1.2 TLSv1.3"
tls-ciphers DEFAULT:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK
tls-prefer-server-ciphers yes

Restart Redis and connect with TLS:

sudo systemctl restart redis

# Connect with TLS
redis-cli --tls \
    --cert /etc/redis/ssl/redis-client-cert.pem \
    --key /etc/redis/ssl/redis-client-key.pem \
    --cacert /etc/redis/ssl/ca-cert.pem \
    -a your_password

Running Redis as Non-Root User

Ensure Redis runs as dedicated user:

# Verify Redis user
ps aux | grep redis

# Check service configuration
sudo systemctl cat redis | grep User

# Ensure correct ownership
sudo chown -R redis:redis /var/lib/redis
sudo chown -R redis:redis /var/log/redis
sudo chown redis:redis /etc/redis/redis.conf

Kernel Security Settings

Optimize kernel parameters for Redis:

sudo nano /etc/sysctl.conf

Add:

# Redis recommended settings
vm.overcommit_memory = 1
net.core.somaxconn = 65535

# Disable transparent huge pages
echo never > /sys/kernel/mm/transparent_hugepage/enabled

Apply changes:

sudo sysctl -p

# Make THP change permanent
sudo nano /etc/rc.local

Add:

#!/bin/bash
echo never > /sys/kernel/mm/transparent_hugepage/enabled
exit 0

Make executable:

sudo chmod +x /etc/rc.local

Performance Optimization

Memory Configuration

Configure memory limits and policies:

# Set maximum memory (recommended)
maxmemory 2gb

# Eviction policy when maxmemory is reached
# allkeys-lru: Evict any key using LRU
# volatile-lru: Evict keys with expire set using LRU
# allkeys-lfu: Evict any key using LFU (Redis 4.0+)
# volatile-lfu: Evict keys with expire set using LFU
# volatile-ttl: Evict keys with expire set, shortest TTL first
# noeviction: Return errors when memory limit is reached
maxmemory-policy allkeys-lru

# Sample size for LRU/LFU algorithms
maxmemory-samples 5

Memory policy selection:

allkeys-lru: General caching use case
volatile-lru: Mixed caching and persistence
allkeys-lfu: Frequency-based eviction (Redis 4.0+)
volatile-ttl: Time-sensitive data
noeviction: When data loss is unacceptable

Monitor memory usage:

# Get memory statistics
redis-cli info memory

# Check used memory
redis-cli info memory | grep used_memory_human

# Check memory fragmentation
redis-cli info memory | grep mem_fragmentation_ratio

# Get specific key memory usage
redis-cli --bigkeys

# Memory usage by key pattern
redis-cli --memkeys --memkeys-samples 1000

Persistence Configuration

Redis offers two persistence options:

RDB (Redis Database Backup):

# Save if at least 1 key changed in 900 seconds
save 900 1

# Save if at least 10 keys changed in 300 seconds
save 300 10

# Save if at least 10000 keys changed in 60 seconds
save 60 10000

# Enable compression
rdbcompression yes

# Enable checksum
rdbchecksum yes

# Filename
dbfilename dump.rdb

# Directory
dir /var/lib/redis

# Stop writes on save error
stop-writes-on-bgsave-error yes

AOF (Append Only File):

# Enable AOF
appendonly yes

# AOF filename
appendfilename "appendonly.aof"

# Sync strategy
# always: Sync after every write (slowest, safest)
# everysec: Sync every second (good compromise)
# no: Let OS decide when to sync (fastest, least safe)
appendfsync everysec

# Rewrite configuration
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb

# Load truncated AOF
aof-load-truncated yes

# Enable RDB-AOF hybrid format (Redis 4.0+)
aof-use-rdb-preamble yes

Persistence recommendations:

High performance cache: Disable both (appendonly no, no save directives)
Data safety critical: Enable AOF with everysec
Balanced approach: RDB snapshots + AOF
Maximum durability: AOF with always (performance impact)

Manual persistence operations:

# Trigger RDB snapshot
redis-cli BGSAVE

# Check last save time
redis-cli LASTSAVE

# Trigger AOF rewrite
redis-cli BGREWRITEAOF

# Get persistence info
redis-cli info persistence

Connection Optimization

# Maximum number of client connections
maxclients 10000

# TCP backlog
tcp-backlog 511

# Close idle connections after N seconds (0 = disable)
timeout 300

# TCP keepalive
tcp-keepalive 300

# Enable fast connection
tcp-fastopen 3

Slow Log Configuration

Monitor slow queries:

# Execution time threshold in microseconds
slowlog-log-slower-than 10000

# Maximum entries in slow log
slowlog-max-len 128

View slow queries:

# Get slow log entries
redis-cli SLOWLOG GET 10

# Get slow log length
redis-cli SLOWLOG LEN

# Reset slow log
redis-cli SLOWLOG RESET

Pipelining and Batch Operations

Use pipelining for better performance:

# Without pipelining (multiple round trips)
redis-cli set key1 value1
redis-cli set key2 value2
redis-cli set key3 value3

# With pipelining (single round trip)
(echo "set key1 value1"; echo "set key2 value2"; echo "set key3 value3") | redis-cli --pipe

# Using redis-cli with multiple commands
redis-cli <<EOF
set key1 value1
set key2 value2
set key3 value3
EOF

Monitoring Performance

Key metrics to monitor:

# Comprehensive server info
redis-cli info

# Specific sections
redis-cli info server
redis-cli info clients
redis-cli info memory
redis-cli info persistence
redis-cli info stats
redis-cli info replication
redis-cli info cpu
redis-cli info keyspace

# Real-time statistics
redis-cli --stat

# Monitor all commands in real-time
redis-cli monitor

# Check connected clients
redis-cli client list

# Latency monitoring
redis-cli --latency
redis-cli --latency-history
redis-cli --latency-dist

# Intrinsic latency test
redis-cli --intrinsic-latency 100

Backup Strategies

RDB Snapshots

Manual backup:

# Trigger background save
redis-cli BGSAVE

# Wait for save to complete
redis-cli LASTSAVE

# Copy RDB file
sudo cp /var/lib/redis/dump.rdb /backup/redis_backup_$(date +%Y%m%d).rdb

# Compress backup
sudo gzip /backup/redis_backup_$(date +%Y%m%d).rdb

AOF Backup

# Copy AOF file
sudo cp /var/lib/redis/appendonly.aof /backup/redis_aof_$(date +%Y%m%d).aof

# Compress backup
sudo gzip /backup/redis_aof_$(date +%Y%m%d).aof

Automated Backup Script

sudo nano /usr/local/bin/redis-backup.sh

Add content:

#!/bin/bash

# Configuration
BACKUP_DIR="/backups/redis"
REDIS_DATA_DIR="/var/lib/redis"
RETENTION_DAYS=7
DATE=$(date +%Y%m%d_%H%M%S)
LOG_FILE="$BACKUP_DIR/backup.log"

# Create backup directory
mkdir -p $BACKUP_DIR

# Function to log messages
log_message() {
    echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1" | tee -a $LOG_FILE
}

log_message "Starting Redis backup"

# Trigger BGSAVE
redis-cli BGSAVE
sleep 2

# Wait for save to complete
while [ "$(redis-cli LASTSAVE)" == "$(redis-cli LASTSAVE)" ]; do
    sleep 1
done

# Copy RDB file
if [ -f "$REDIS_DATA_DIR/dump.rdb" ]; then
    cp $REDIS_DATA_DIR/dump.rdb $BACKUP_DIR/dump_$DATE.rdb
    gzip $BACKUP_DIR/dump_$DATE.rdb
    log_message "RDB backup completed: dump_$DATE.rdb.gz"
fi

# Copy AOF file if exists
if [ -f "$REDIS_DATA_DIR/appendonly.aof" ]; then
    cp $REDIS_DATA_DIR/appendonly.aof $BACKUP_DIR/appendonly_$DATE.aof
    gzip $BACKUP_DIR/appendonly_$DATE.aof
    log_message "AOF backup completed: appendonly_$DATE.aof.gz"
fi

# Remove old backups
find $BACKUP_DIR -name "dump_*.rdb.gz" -mtime +$RETENTION_DAYS -delete
find $BACKUP_DIR -name "appendonly_*.aof.gz" -mtime +$RETENTION_DAYS -delete
log_message "Removed backups older than $RETENTION_DAYS days"

# Calculate backup size
TOTAL_SIZE=$(du -sh $BACKUP_DIR | cut -f1)
log_message "Total backup directory size: $TOTAL_SIZE"

log_message "Backup process completed"

Make executable and schedule:

sudo chmod +x /usr/local/bin/redis-backup.sh

# Test script
sudo /usr/local/bin/redis-backup.sh

# Schedule with cron (daily at 2 AM)
sudo crontab -e

# Add line:
0 2 * * * /usr/local/bin/redis-backup.sh

Restoring from Backup

# Stop Redis
sudo systemctl stop redis

# Restore RDB file
sudo gunzip /backup/dump_20260111.rdb.gz
sudo cp /backup/dump_20260111.rdb /var/lib/redis/dump.rdb

# Or restore AOF file
sudo gunzip /backup/appendonly_20260111.aof.gz
sudo cp /backup/appendonly_20260111.aof /var/lib/redis/appendonly.aof

# Set ownership
sudo chown redis:redis /var/lib/redis/dump.rdb
sudo chown redis:redis /var/lib/redis/appendonly.aof

# Start Redis
sudo systemctl start redis

# Verify data
redis-cli keys "*"

Troubleshooting

Connection Issues

# Check if Redis is running
sudo systemctl status redis

# Check listening ports
sudo ss -tulpn | grep 6379

# Check logs
sudo tail -f /var/log/redis/redis-server.log

# Test connection
redis-cli ping

# Test with authentication
redis-cli -a your_password ping

# Check configuration
redis-cli config get bind
redis-cli config get port
redis-cli config get requirepass

Memory Issues

# Check memory usage
redis-cli info memory

# Check memory policy
redis-cli config get maxmemory-policy

# Find large keys
redis-cli --bigkeys

# Check memory fragmentation
redis-cli info memory | grep fragmentation

# If fragmentation is high, restart Redis
sudo systemctl restart redis

Performance Issues

# Check slow queries
redis-cli SLOWLOG GET 10

# Monitor commands
redis-cli monitor

# Check latency
redis-cli --latency

# Check connected clients
redis-cli client list

# Find expensive commands
redis-cli --stat

# Check hit rate
redis-cli info stats | grep keyspace

Persistence Issues

# Check persistence status
redis-cli info persistence

# Check last save status
redis-cli LASTSAVE

# Manually trigger save
redis-cli BGSAVE

# Check AOF status
redis-cli config get appendonly

# Manually rewrite AOF
redis-cli BGREWRITEAOF

# Check logs for errors
sudo tail -f /var/log/redis/redis-server.log

Conclusion

Redis provides exceptional performance and versatility as an in-memory data store. This guide has covered installation, configuration, security, optimization, and maintenance practices essential for production deployments.

Key Takeaways

Security: Always use authentication and restrict network access
Memory Management: Configure appropriate eviction policies
Persistence: Choose RDB, AOF, or both based on requirements
Monitoring: Track memory usage, slow queries, and performance metrics
Backups: Implement automated backup strategies

Best Practices Summary

Enable authentication with strong passwords
Use Redis 6+ ACLs for granular access control
Configure maxmemory and eviction policies
Choose appropriate persistence strategy
Disable dangerous commands in production
Monitor memory usage and fragmentation
Implement regular automated backups
Use SSL/TLS for remote connections
Optimize kernel parameters
Keep Redis updated with security patches

Additional Resources

Redis's simplicity and performance make it an essential tool in modern application architectures. Master these fundamentals to build fast, reliable systems.

Redis Installation and Configuration: Complete In-Memory Database Guide

Redis Installation and Configuration: Complete In-Memory Database Guide

Introduction

Why Choose Redis?

Prerequisites

System Requirements

Prerequisites Check

Installation

Installing Redis on Ubuntu/Debian

Installing Redis on CentOS/Rocky Linux

Installing from Source

Verifying Installation

Directory Structure

Initial Configuration

Understanding redis.conf

Configuring Network Settings

Setting Up Authentication

Redis 6+ ACL Configuration

Enabling Remote Access

Security Hardening

Firewall Configuration

Disabling Dangerous Commands

SSL/TLS Encryption

Running Redis as Non-Root User

Kernel Security Settings

Performance Optimization

Memory Configuration

Persistence Configuration

Connection Optimization

Slow Log Configuration

Pipelining and Batch Operations

Monitoring Performance

Backup Strategies

RDB Snapshots

AOF Backup

Automated Backup Script

Restoring from Backup

Troubleshooting

Connection Issues

Memory Issues

Performance Issues

Persistence Issues

Conclusion

Key Takeaways

Best Practices Summary

Additional Resources

Latest Video

Get $20 Free Credit