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Capacity Planning & Sizing

Master CICS capacity planning and sizing including capacity planning methodologies, resource sizing calculations, growth planning, and capacity monitoring.

Capacity Planning
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Introduction to Capacity Planning

Capacity planning in CICS involves determining the resources needed to meet current and future performance requirements. It ensures optimal resource utilization and prevents performance degradation due to insufficient capacity.

🎯Learning Objective

By the end of this tutorial, you'll understand capacity planning concepts, capacity planning methodologies, resource sizing calculations, growth planning strategies, and capacity monitoring for comprehensive CICS resource management.

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What is Capacity Planning in CICS?

Capacity planning in CICS involves determining the resources needed to meet current and future performance requirements. It includes capacity planning methodologies, resource sizing calculations, growth planning, and capacity monitoring for optimal CICS resource management.

Capacity Planning Explained Simply

Think of capacity planning like planning a party. You need to figure out how much food, drinks, space, and seating you'll need based on how many people are coming and what kind of party it is. You don't want to run out of things, but you also don't want to waste money on too much.

In CICS, capacity planning means figuring out how much computer power, memory, storage, and network capacity you'll need to handle your current workload and any expected growth. You want to have enough resources to keep everything running smoothly, but not so much that you're wasting money on unused capacity.

Planning Components

📈Current Capacity Analysis

  • Current resource utilization
  • Performance baseline analysis
  • Workload characterization
  • Resource bottleneck identification

🔮Future Capacity Planning

  • Growth forecasting
  • Capacity requirement prediction
  • Resource scaling strategies
  • Infrastructure planning

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Capacity Planning Methodologies

Capacity planning methodologies in CICS are systematic approaches for determining resource requirements. They include workload analysis, performance modeling, capacity forecasting, and resource optimization strategies for comprehensive capacity planning.

Methodology Types

📊Workload Analysis Methodology

Analyzing current and projected workloads:

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Workload Analysis Methodology: 1. Workload Characterization - Transaction volume analysis - User behavior analysis - Application usage patterns - Peak usage identification 2. Performance Requirements Analysis - Response time requirements - Throughput requirements - Availability requirements - Scalability requirements 3. Resource Consumption Analysis - CPU consumption analysis - Memory consumption analysis - I/O consumption analysis - Network consumption analysis 4. Workload Projection - Transaction volume projection - User growth projection - Application growth projection - Resource requirement projection Example Workload Analysis: Current: 10,000 transactions/day Peak: 15,000 transactions/hour Growth: 20% annual growth Projection: 12,000 transactions/day next year Resources: CPU 80%, Memory 70%, I/O 60%

🔬Performance Modeling Methodology

Creating performance models for capacity planning:

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Performance Modeling Methodology: 1. System Performance Modeling - System performance characteristics - Performance bottleneck modeling - Performance scaling modeling - Performance optimization modeling 2. Application Performance Modeling - Application performance characteristics - Application scaling modeling - Application optimization modeling - Application resource modeling 3. Resource Performance Modeling - CPU performance modeling - Memory performance modeling - I/O performance modeling - Network performance modeling 4. Capacity Planning Modeling - Capacity requirement modeling - Capacity scaling modeling - Capacity optimization modeling - Capacity planning modeling Example Performance Modeling: System: Linear scaling up to 80% utilization Application: Customer management app Resources: CPU-bound application Model: 2x workload = 2x CPU requirement Planning: Add CPU capacity for growth

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Resource Sizing Calculations

Resource sizing in CICS involves calculating the appropriate amount of resources needed for optimal performance. It includes CPU sizing, memory sizing, storage sizing, and network sizing calculations for proper resource allocation.

Sizing Calculations

💻CPU Sizing Calculations

Calculating CPU requirements for CICS:

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CPU Sizing Calculations: 1. CPU Utilization Analysis - Current CPU utilization - Peak CPU utilization - CPU utilization trends - CPU utilization patterns 2. CPU Requirement Calculation - Base CPU requirement - Peak CPU requirement - Growth CPU requirement - Buffer CPU requirement 3. CPU Capacity Planning - CPU capacity requirements - CPU scaling requirements - CPU optimization requirements - CPU monitoring requirements 4. CPU Sizing Formula CPU Required = (Peak Utilization / Target Utilization) × Current CPU Growth Factor = 1 + (Annual Growth Rate / 100) Total CPU = CPU Required × Growth Factor × Buffer Factor Example CPU Sizing: Current: 4 CPU cores at 80% utilization Peak: 95% utilization Target: 70% utilization Growth: 20% annual growth Buffer: 20% buffer Calculation: (95/70) × 4 × 1.2 × 1.2 = 7.8 CPU cores Recommendation: 8 CPU cores

💾Memory Sizing Calculations

Calculating memory requirements for CICS:

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Memory Sizing Calculations: 1. Memory Utilization Analysis - Current memory utilization - Peak memory utilization - Memory utilization trends - Memory utilization patterns 2. Memory Requirement Calculation - Base memory requirement - Peak memory requirement - Growth memory requirement - Buffer memory requirement 3. Memory Capacity Planning - Memory capacity requirements - Memory scaling requirements - Memory optimization requirements - Memory monitoring requirements 4. Memory Sizing Formula Memory Required = (Peak Utilization / Target Utilization) × Current Memory Growth Factor = 1 + (Annual Growth Rate / 100) Total Memory = Memory Required × Growth Factor × Buffer Factor Example Memory Sizing: Current: 8GB memory at 75% utilization Peak: 90% utilization Target: 80% utilization Growth: 15% annual growth Buffer: 25% buffer Calculation: (90/80) × 8 × 1.15 × 1.25 = 12.9GB Recommendation: 16GB memory

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Growth Planning and Forecasting

Growth planning in CICS involves planning for future capacity requirements based on business growth, user growth, and transaction volume growth. It includes growth forecasting, capacity scaling, and infrastructure planning for future needs.

Growth Planning

📊Growth Forecasting

Forecasting future growth requirements:

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Growth Forecasting: 1. Business Growth Analysis - Business volume growth - Customer growth - Transaction growth - Revenue growth 2. User Growth Analysis - User count growth - User activity growth - User behavior changes - User demand growth 3. Technology Growth Analysis - Technology advancement impact - New feature adoption - Technology migration impact - Technology optimization impact 4. Growth Projection Methods - Linear growth projection - Exponential growth projection - Seasonal growth projection - Compound growth projection Example Growth Forecasting: Business: 25% annual revenue growth Users: 30% annual user growth Transactions: 35% annual transaction growth Technology: 10% efficiency improvement Projection: 3-year growth forecast Planning: Infrastructure scaling plan

🏗️Infrastructure Planning

Planning infrastructure for future growth:

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Infrastructure Planning: 1. Hardware Planning - Server capacity planning - Storage capacity planning - Network capacity planning - Backup capacity planning 2. Software Planning - Software licensing planning - Software upgrade planning - Software optimization planning - Software maintenance planning 3. Facility Planning - Data center capacity planning - Power capacity planning - Cooling capacity planning - Space capacity planning 4. Resource Planning - Human resource planning - Budget planning - Timeline planning - Risk planning Example Infrastructure Planning: Hardware: Additional servers for 2x capacity Software: License upgrades for new features Facility: Data center expansion for growth Resources: Additional staff for maintenance Timeline: 6-month implementation plan Budget: $500K infrastructure investment

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Capacity Monitoring and Alerting

Capacity monitoring and alerting in CICS involves continuously monitoring resource utilization, capacity trends, and performance metrics to ensure optimal capacity management. It includes real-time monitoring, capacity alerts, and capacity reporting.

Monitoring Strategies

🔍Real-Time Capacity Monitoring

Implementing real-time capacity monitoring:

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Real-Time Capacity Monitoring: 1. Resource Utilization Monitoring - CPU utilization monitoring - Memory utilization monitoring - I/O utilization monitoring - Network utilization monitoring 2. Performance Monitoring - Response time monitoring - Throughput monitoring - Error rate monitoring - Availability monitoring 3. Capacity Trend Monitoring - Capacity trend analysis - Capacity growth monitoring - Capacity utilization monitoring - Capacity forecasting monitoring 4. Alert Management - Threshold-based alerts - Trend-based alerts - Performance alerts - Capacity alerts Example Real-Time Monitoring: CPU: 85% utilization (Alert at 90%) Memory: 78% utilization (Alert at 85%) Response Time: 1.2s average (Alert at 2s) Throughput: 1000 TPS (Alert at 1200 TPS) Trend: 5% monthly growth detected

📈Capacity Reporting

Comprehensive capacity reporting:

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Capacity Reporting: 1. Executive Capacity Reports - High-level capacity summary - Capacity utilization trends - Capacity planning recommendations - Capacity investment requirements 2. Technical Capacity Reports - Detailed capacity analysis - Resource utilization details - Performance impact analysis - Optimization recommendations 3. Operational Capacity Reports - Daily capacity reports - Weekly capacity summaries - Monthly capacity reviews - Quarterly capacity assessments 4. Capacity Planning Reports - Capacity requirement reports - Capacity scaling reports - Capacity optimization reports - Capacity investment reports Example Capacity Reporting: Executive: 80% capacity utilization, 6-month runway Technical: CPU bottleneck identified, memory optimization needed Operational: Daily capacity trending upward Planning: Additional CPU capacity needed in 3 months Investment: $200K for capacity expansion

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Summary

Capacity planning and sizing in CICS provides comprehensive resource management for optimal performance. Through capacity planning methodologies, resource sizing calculations, growth planning, and capacity monitoring, CICS environments can ensure adequate resources for current and future needs.

Understanding capacity planning concepts, methodologies, resource sizing calculations, growth planning strategies, and capacity monitoring is essential for implementing effective capacity management in enterprise CICS environments.