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🐚 Caching Strategies in TuskLang - Bash Guide

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Caching Strategies in TuskLang - Bash Guide

💾 Revolutionary Caching Strategy Configuration

Caching strategies in TuskLang transform your configuration files into intelligent, multi-tier caching systems. No more simple key-value stores or rigid cache policies—everything lives in your TuskLang configuration with dynamic cache invalidation, intelligent prefetching, and comprehensive cache analytics.

> "We don't bow to any king" – TuskLang caching strategies break free from traditional cache constraints and bring modern caching capabilities to your Bash applications.

🚀 Core Caching Strategy Directives

Basic Caching Strategy Setup

#caching: enabled                     # Enable caching
#cache-enabled: true                 # Alternative syntax
#cache-strategy: lru                 # Cache eviction strategy
#cache-ttl: 3600                    # Time to live (seconds)
#cache-max-size: 1000               # Maximum cache size
#cache-prefetch: true               # Enable cache prefetching

Advanced Caching Strategy Configuration

#cache-invalidation: smart           # Cache invalidation strategy
#cache-distributed: true             # Enable distributed caching
#cache-persistence: true             # Enable cache persistence
#cache-compression: true             # Enable cache compression
#cache-monitoring: true              # Enable cache monitoring
#cache-analytics: true               # Enable cache analytics

🔧 Bash Caching Strategy Implementation

Basic Cache Manager

#!/bin/bash
Load caching strategy configuration

source <(tsk load caching-strategy.tsk)
Caching strategy configuration

CACHE_ENABLED="${cache_enabled:-true}"
CACHE_STRATEGY="${cache_strategy:-lru}"
CACHE_TTL="${cache_ttl:-3600}"
CACHE_MAX_SIZE="${cache_max_size:-1000}"
CACHE_PREFETCH="${cache_prefetch:-true}"
Cache manager

class CacheManager {
    constructor() {
        this.enabled = CACHE_ENABLED
        this.strategy = CACHE_STRATEGY
        this.ttl = CACHE_TTL
        this.maxSize = CACHE_MAX_SIZE
        this.prefetch = CACHE_PREFETCH
        this.cache = new Map()
        this.accessTimes = new Map()
        this.stats = {
            hits: 0,
            misses: 0,
            evictions: 0,
            sets: 0
        }
    }
    
    get(key) {
        if (!this.enabled) return null
        
        const item = this.cache.get(key)
        if (item && !this.isExpired(item)) {
            this.accessTimes.set(key, Date.now())
            this.stats.hits++
            return item.value
        }
        
        this.stats.misses++
        return null
    }
    
    set(key, value, ttl = this.ttl) {
        if (!this.enabled) return
        
        // Check if cache is full
        if (this.cache.size >= this.maxSize) {
            this.evict()
        }
        
        const item = {
            value,
            timestamp: Date.now(),
            ttl: ttl * 1000
        }
        
        this.cache.set(key, item)
        this.accessTimes.set(key, Date.now())
        this.stats.sets++
    }
    
    isExpired(item) {
        return Date.now() - item.timestamp > item.ttl
    }
    
    evict() {
        switch (this.strategy) {
            case 'lru':
                this.evictLRU()
                break
            case 'lfu':
                this.evictLFU()
                break
            case 'fifo':
                this.evictFIFO()
                break
            default:
                this.evictLRU()
        }
    }
    
    evictLRU() {
        let oldestKey = null
        let oldestTime = Date.now()
        
        for (const [key, time] of this.accessTimes) {
            if (time < oldestTime) {
                oldestTime = time
                oldestKey = key
            }
        }
        
        if (oldestKey) {
            this.cache.delete(oldestKey)
            this.accessTimes.delete(oldestKey)
            this.stats.evictions++
        }
    }
    
    evictLFU() {
        // Implementation for LFU eviction
        this.stats.evictions++
    }
    
    evictFIFO() {
        // Implementation for FIFO eviction
        this.stats.evictions++
    }
    
    getStats() {
        return { ...this.stats }
    }
    
    clear() {
        this.cache.clear()
        this.accessTimes.clear()
    }
}
Initialize cache manager

const cacheManager = new CacheManager()

Dynamic Cache Operations

#!/bin/bash
Dynamic cache operations

cache_get() {
    local key="$1"
    local cache_dir="${cache_directory:-/tmp/cache}"
    local cache_file="$cache_dir/$key"
    
    if [[ -f "$cache_file" ]]; then
        local timestamp=$(jq -r '.timestamp' "$cache_file" 2>/dev/null)
        local ttl=$(jq -r '.ttl' "$cache_file" 2>/dev/null)
        local current_time=$(date +%s)
        
        # Check if cache is expired
        if [[ $((current_time - timestamp)) -lt $ttl ]]; then
            local value=$(jq -r '.value' "$cache_file" 2>/dev/null)
            echo "$value"
            return 0
        else
            # Remove expired cache
            rm -f "$cache_file"
        fi
    fi
    
    return 1
}
cache_set() {
    local key="$1"
    local value="$2"
    local ttl="${3:-3600}"
    local cache_dir="${cache_directory:-/tmp/cache}"
    local cache_file="$cache_dir/$key"
    
    # Create cache directory
    mkdir -p "$cache_dir"
    
    # Create cache entry
    cat > "$cache_file" << EOF
{
    "key": "$key",
    "value": "$value",
    "timestamp": $(date +%s),
    "ttl": $ttl
}
EOF
    
    echo "✓ Cache set: $key"
}
cache_delete() {
    local key="$1"
    local cache_dir="${cache_directory:-/tmp/cache}"
    local cache_file="$cache_dir/$key"
    
    if [[ -f "$cache_file" ]]; then
        rm -f "$cache_file"
        echo "✓ Cache deleted: $key"
    else
        echo "Cache not found: $key"
    fi
}
cache_clear() {
    local cache_dir="${cache_directory:-/tmp/cache}"
    
    if [[ -d "$cache_dir" ]]; then
        rm -rf "$cache_dir"/*
        echo "✓ Cache cleared"
    fi
}

Intelligent Cache Invalidation

#!/bin/bash
Intelligent cache invalidation

smart_cache_invalidation() {
    local pattern="$1"
    local cache_dir="${cache_directory:-/tmp/cache}"
    
    # Find and invalidate matching cache entries
    find "$cache_dir" -name "$pattern" -type f -delete
    
    echo "✓ Smart cache invalidation completed for pattern: $pattern"
}
cache_invalidation_by_time() {
    local max_age="${1:-3600}" # seconds
    local cache_dir="${cache_directory:-/tmp/cache}"
    local current_time=$(date +%s)
    
    # Find and remove old cache entries
    find "$cache_dir" -name "*.json" -type f -exec sh -c '
        for file do
            local timestamp=$(jq -r ".timestamp" "$file" 2>/dev/null || echo 0)
            if [[ $((current_time - timestamp)) -gt $max_age ]]; then
                rm -f "$file"
            fi
        done
    ' sh {} +
    
    echo "✓ Cache invalidation by time completed (max age: ${max_age}s)"
}
cache_invalidation_by_size() {
    local max_size="${1:-1000}" # entries
    local cache_dir="${cache_directory:-/tmp/cache}"
    
    # Count cache entries
    local count=$(find "$cache_dir" -name "*.json" -type f | wc -l)
    
    if [[ $count -gt $max_size ]]; then
        # Remove oldest entries
        local to_remove=$((count - max_size))
        find "$cache_dir" -name "*.json" -type f -printf '%T@ %p\n' | sort -n | head -n "$to_remove" | cut -d' ' -f2- | xargs rm -f
        
        echo "✓ Cache invalidation by size completed (removed $to_remove entries)"
    else
        echo "Cache size within limits ($count/$max_size)"
    fi
}

Cache Prefetching

#!/bin/bash
Cache prefetching

cache_prefetch() {
    local key_pattern="$1"
    local data_source="$2"
    local ttl="${3:-3600}"
    
    echo "Prefetching cache for pattern: $key_pattern"
    
    # Generate keys to prefetch
    local keys=($(generate_prefetch_keys "$key_pattern"))
    
    for key in "${keys[@]}"; do
        # Fetch data from source
        local data=$(fetch_data_from_source "$data_source" "$key")
        
        if [[ -n "$data" ]]; then
            # Cache the data
            cache_set "$key" "$data" "$ttl"
            echo "✓ Prefetched: $key"
        fi
    done
    
    echo "✓ Cache prefetching completed"
}
generate_prefetch_keys() {
    local pattern="$1"
    
    # Generate keys based on pattern
    case "$pattern" in
        "user_*")
            echo "user_profile user_settings user_preferences"
            ;;
        "config_*")
            echo "config_system config_application config_database"
            ;;
        "data_*")
            echo "data_recent data_popular data_trending"
            ;;
        *)
            echo "default_key"
            ;;
    esac
}
fetch_data_from_source() {
    local source="$1"
    local key="$2"
    
    case "$source" in
        "database")
            fetch_from_database "$key"
            ;;
        "api")
            fetch_from_api "$key"
            ;;
        "file")
            fetch_from_file "$key"
            ;;
        *)
            echo "default_data"
            ;;
    esac
}

Distributed Caching

#!/bin/bash
Distributed caching

distributed_cache_get() {
    local key="$1"
    local cache_nodes=("${cache_nodes[@]:-localhost:6379}")
    
    for node in "${cache_nodes[@]}"; do
        local host="${node%:*}"
        local port="${node#*:}"
        
        # Try to get from this node
        local value=$(redis-cli -h "$host" -p "$port" GET "$key" 2>/dev/null)
        
        if [[ -n "$value" ]]; then
            echo "$value"
            return 0
        fi
    done
    
    return 1
}
distributed_cache_set() {
    local key="$1"
    local value="$2"
    local ttl="${3:-3600}"
    local cache_nodes=("${cache_nodes[@]:-localhost:6379}")
    
    # Set in all nodes for redundancy
    for node in "${cache_nodes[@]}"; do
        local host="${node%:*}"
        local port="${node#*:}"
        
        redis-cli -h "$host" -p "$port" SETEX "$key" "$ttl" "$value" >/dev/null 2>&1
    done
    
    echo "✓ Distributed cache set: $key"
}
distributed_cache_sync() {
    local source_node="${1:-localhost:6379}"
    local target_nodes=("${@:2}")
    
    echo "Synchronizing cache from $source_node to ${#target_nodes[@]} nodes..."
    
    # Get all keys from source
    local host="${source_node%:*}"
    local port="${source_node#*:}"
    local keys=$(redis-cli -h "$host" -p "$port" KEYS "*" 2>/dev/null)
    
    for key in $keys; do
        local value=$(redis-cli -h "$host" -p "$port" GET "$key" 2>/dev/null)
        local ttl=$(redis-cli -h "$host" -p "$port" TTL "$key" 2>/dev/null)
        
        # Set in target nodes
        for target_node in "${target_nodes[@]}"; do
            local target_host="${target_node%:*}"
            local target_port="${target_node#*:}"
            
            if [[ $ttl -gt 0 ]]; then
                redis-cli -h "$target_host" -p "$target_port" SETEX "$key" "$ttl" "$value" >/dev/null 2>&1
            else
                redis-cli -h "$target_host" -p "$target_port" SET "$key" "$value" >/dev/null 2>&1
            fi
        done
    done
    
    echo "✓ Distributed cache synchronization completed"
}

Cache Analytics

#!/bin/bash
Cache analytics

cache_analytics() {
    local cache_dir="${cache_directory:-/tmp/cache}"
    local analytics_file="/var/log/cache_analytics.json"
    
    # Collect cache statistics
    local total_entries=$(find "$cache_dir" -name "*.json" -type f | wc -l)
    local total_size=$(du -sb "$cache_dir" 2>/dev/null | cut -f1)
    local hit_count=0
    local miss_count=0
    
    # Read hit/miss counts from log
    if [[ -f "/var/log/cache.log" ]]; then
        hit_count=$(grep -c "HIT" "/var/log/cache.log" 2>/dev/null || echo 0)
        miss_count=$(grep -c "MISS" "/var/log/cache.log" 2>/dev/null || echo 0)
    fi
    
    # Calculate hit rate
    local total_requests=$((hit_count + miss_count))
    local hit_rate=0
    if [[ $total_requests -gt 0 ]]; then
        hit_rate=$(echo "scale=2; $hit_count * 100 / $total_requests" | bc -l)
    fi
    
    # Generate analytics report
    cat > "$analytics_file" << EOF
{
    "timestamp": "$(date -Iseconds)",
    "total_entries": $total_entries,
    "total_size_bytes": $total_size,
    "hit_count": $hit_count,
    "miss_count": $miss_count,
    "hit_rate_percent": $hit_rate,
    "cache_efficiency": "$(calculate_cache_efficiency $hit_rate)"
}
EOF
    
    echo "✓ Cache analytics generated: $analytics_file"
}
calculate_cache_efficiency() {
    local hit_rate="$1"
    
    if [[ $(echo "$hit_rate >= 80" | bc -l) -eq 1 ]]; then
        echo "excellent"
    elif [[ $(echo "$hit_rate >= 60" | bc -l) -eq 1 ]]; then
        echo "good"
    elif [[ $(echo "$hit_rate >= 40" | bc -l) -eq 1 ]]; then
        echo "fair"
    else
        echo "poor"
    fi
}

🎯 Real-World Configuration Examples

Complete Caching Strategy Configuration

caching-strategy-config.tsk

caching_strategy_config:
  enabled: true
  strategy: lru
  ttl: 3600
  max_size: 1000
  prefetch: true
#caching: enabled
#cache-enabled: true
#cache-strategy: lru
#cache-ttl: 3600
#cache-max-size: 1000
#cache-prefetch: true
#cache-invalidation: smart
#cache-distributed: true
#cache-persistence: true
#cache-compression: true
#cache-monitoring: true
#cache-analytics: true
#cache-config:

 general:


   strategy: lru


   ttl: 3600


   max_size: 1000


   prefetch: true


 invalidation:


   strategy: smart


   patterns:


     - "user_*"


     - "config_*"


     - "data_*"


   time_based: true


   size_based: true


 distributed:


   enabled: true


   nodes:


     - "localhost:6379"


     - "cache1.example.com:6379"


     - "cache2.example.com:6379"


   sync_interval: 300


 persistence:


   enabled: true


   directory: "/var/cache"


   compression: true


   backup: true


 monitoring:


   enabled: true


   metrics:


     - "hit_rate"


     - "miss_rate"


     - "eviction_rate"


     - "size"


 analytics:


   enabled: true


   interval: 60


   retention: "7d"


 prefetch:


   enabled: true


   patterns:


     user_profile: "user_*"


     config_data: "config_*"


     popular_data: "data_*"

Multi-Tier Caching

multi-tier-caching.tsk

multi_tier_caching:
  tiers:
    - name: l1
      type: memory
      size: 100
      ttl: 300
    - name: l2
      type: disk
      size: 1000
      ttl: 3600
    - name: l3
      type: distributed
      size: 10000
      ttl: 86400
#cache-l1: memory:100:300
#cache-l2: disk:1000:3600
#cache-l3: distributed:10000:86400
#cache-config:

 tiers:


   l1:


     type: memory


     size: 100


     ttl: 300


     strategy: lru


   l2:


     type: disk


     size: 1000


     ttl: 3600


     strategy: lru


   l3:


     type: distributed


     size: 10000


     ttl: 86400


     strategy: lru

🚨 Troubleshooting Caching Strategies

Common Issues and Solutions

1. Cache Performance Issues 

Debug cache performance

debug_cache_performance() {
    echo "Debugging cache performance..."
    cache_analytics
    echo "Cache performance analysis completed"
}

2. Cache Invalidation Issues 

Debug cache invalidation

debug_cache_invalidation() {
    local pattern="$1"
    echo "Debugging cache invalidation for pattern: $pattern"
    smart_cache_invalidation "$pattern"
}

🔒 Security Best Practices

Caching Strategy Security Checklist

Security validation

validate_caching_strategy_security() {
    echo "Validating caching strategy security configuration..."
    # Check cache encryption
    if [[ "${cache_encryption}" == "true" ]]; then
        echo "✓ Cache encryption enabled"
    else
        echo "⚠ Cache encryption not enabled"
    fi
    # Check cache access controls
    if [[ "${cache_access_controls}" == "true" ]]; then
        echo "✓ Cache access controls enabled"
    else
        echo "⚠ Cache access controls not enabled"
    fi
    # Check cache data sanitization
    if [[ "${cache_data_sanitization}" == "true" ]]; then
        echo "✓ Cache data sanitization enabled"
    else
        echo "⚠ Cache data sanitization not enabled"
    fi
}

📈 Performance Optimization Tips

Caching Strategy Performance Checklist

Performance validation

validate_caching_strategy_performance() {
    echo "Validating caching strategy performance configuration..."
    # Check cache size
    local max_size="${cache_max_size:-1000}"
    if [[ "$max_size" -le 10000 ]]; then
        echo "✓ Reasonable cache size ($max_size)"
    else
        echo "⚠ Large cache size may impact memory usage ($max_size)"
    fi
    # Check TTL
    local ttl="${cache_ttl:-3600}" # seconds
    if [[ "$ttl" -ge 300 ]]; then
        echo "✓ Reasonable TTL ($ttl s)"
    else
        echo "⚠ Short TTL may impact cache effectiveness ($ttl s)"
    fi
    # Check prefetching
    if [[ "${cache_prefetch}" == "true" ]]; then
        echo "✓ Cache prefetching enabled"
    else
        echo "⚠ Cache prefetching not enabled"
    fi
}

🎯 Next Steps

- Cache Optimization: Learn about advanced cache optimization - Cache Visualization: Create cache visualization dashboards - Cache Correlation: Implement cache correlation and alerting - Cache Compliance: Set up cache compliance and auditing

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Caching strategies transform your TuskLang configuration into an intelligent, multi-tier caching system. It brings modern caching capabilities to your Bash applications with dynamic invalidation, intelligent prefetching, and comprehensive analytics!

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