Cache Optimizer

A comprehensive tool for optimizing and managing web server caching mechanisms, including FastCGI and Redis caching.

Features

• FastCGI cache configuration
• Redis cache optimization
• Cache performance analysis
• Cache monitoring and reporting
• Multi-layer caching support
• Cache warming capabilities

Installation

Prerequisites

• Bash shell
• Python 3 (for dashboard)
• jq (for JSON processing)
• yq (for YAML processing, optional)
• Root or sudo privileges

Installation Steps

1. Clone the repository:

git clone https://github.com/yourusername/lambda-scripts.git
cd lambda-scripts/admin-tools

2. Make the script executable:

chmod +x cache-optimizer.sh

3. Install dependencies:

For Debian/Ubuntu:

sudo apt-get update
sudo apt-get install -y python3 jq redis-server

For RHEL/CentOS:

sudo yum install -y python3 jq redis

4. Download the script from the Lambda Softworks Customer Portal:
   • Log in to your Lambda Softworks Customer Portal account
   • Navigate to the Files section
   • Download the cache-optimizer.sh script

Usage

Basic Commands

1. Setup FastCGI cache:

sudo ./cache-optimizer.sh --setup-fastcgi

2. Optimize Redis:

sudo ./cache-optimizer.sh --optimize-redis

3. Monitor cache performance:

sudo ./cache-optimizer.sh --monitor 60 3600

Advanced Options

• --analyze: Analyze cache performance
• --clear TYPE: Clear specified cache (fastcgi,redis,all)
• --monitor [interval] [duration]: Monitor cache performance

Configuration

Cache Configuration

# /etc/web-tools/cache-config.yml
redis:
  maxmemory: 2gb
  maxmemory_policy: allkeys-lru
  save_frequency: 900
  appendonly: true
  appendfsync: everysec

fastcgi:
  cache_path: /var/cache/nginx
  cache_levels: 1:2
  cache_valid: 60m
  cache_min_uses: 1

Logs and Data Storage

Log File Location

• /var/log/web-tools/cache-optimizer.log

Cache Locations

• FastCGI Cache: /var/cache/nginx
• Redis Data: /var/lib/redis

Backup Location

• /etc/web-tools/cache-backups/

Report Location

• /var/log/web-tools/cache-reports/

Cross-Platform Compatibility

Linux Support

• RHEL/CentOS 7+
• Ubuntu 18.04+
• Debian 10+
• Other Linux distributions with systemd

Service Support

• Nginx 1.18+
• Redis 6.0+

Examples

Cache Setup

# Setup FastCGI cache
sudo ./cache-optimizer.sh --setup-fastcgi

# Optimize Redis
sudo ./cache-optimizer.sh --optimize-redis

Cache Management

# Analyze cache performance
sudo ./cache-optimizer.sh --analyze

# Clear specific cache
sudo ./cache-optimizer.sh --clear fastcgi
sudo ./cache-optimizer.sh --clear redis

# Monitor cache performance
sudo ./cache-optimizer.sh --monitor 300 7200

Troubleshooting

Common Issues

1. Permission Errors

   • Ensure the script is run with sudo
   • Check directory permissions
   • Verify user has necessary privileges

2. Cache Issues

   • Verify cache directory permissions
   • Check cache size limits
   • Review cache configuration

3. Report Generation Issues

   • Check log directory permissions
   • Verify HTML template access
   • Check disk space

Debug Mode

To enable debug logging:

sudo DEBUG=1 ./cache-optimizer.sh [OPTIONS]