a brief about capacity planing strategies and models.

1. Capacity Planning
in Brief
ANTHONY DEHNASHI
2012

2. Overview
 Overview:
 Obviously we can’t encapsulate all capacity planning details in
a couple of slides
 Very high-level briefing.
 Models and suggested model outlined.
 Overall process to do capacity planning.

3. What is capacity planning
 The process of determining
 The production capacity needed by an organization to meet
changing demands for its products, services, and business.
 If the service level agreement (SLA) and / or operational level
agreement (OLA) are continuously met for that specific
environment ,technology, and standards within defined cost
constraints.

4. Overall Imp. Strategies
101
Strategies
Match
Lead Strategy Lag Strategy
Strategy
Add capacity way before the fact. Add capacity after the fact Add capacity step by step

5. Match Strategy
 Match Strategy:
 More moderate strategy to stay aligned in support
for your business forecast and SLAs:
 Avoid overheads
 Avoid unnecessary costs.
 Add capacity when its needed and where its
needed.
 Add capacity only if there is a demand for it.

6. Capacity Planning Steps
 What to do for Capacity Planning
 Identify the service level agreements (SLA)
 Define and determine the SLA through the system and the end
users expectations. Assuming you define some sort of metrics and
KPIs in your SLA.
 Analyze the current baseline capacity (nX)
 Identify the current state of the capacity and determine the quality
of it against the current SLA and user expectations.
 Forecast Capacity
 Plan for the future capacity based on the Architecture
Vision, Strategic Architecture, Business requirements , system&
user expectations, SLA,…

7. Building Methodology
Steps to Create Methodology
Cost +
Classify the Performance
Performance
workload modeling
• Understand the • Future workload • Future
Analysis
environment definition performance shape
• Define the • Model of • Analysis and
workload performance conclusion
Knowing the Forecast the Forecast
system workload performance

8. Pieces of puzzle
 Some important areas of concern in capacity
 Server Hardware
 OS software
 Web servers, application servers
 LAN and WAN infrastructure detail.
 Communication and connectivity
 Business components.
 Internal and External Integrations Points
 Database
 Firewalls
 Load balancers
 NAS and SAN
 Third party software

9. Available Models
Workload model
• Load and demand on the system and each component within the system
Performance model
• Define the current system performance and predict the future performance of the system
• Define utilization, throughput, response time, wait time, data usage, bandwidth, …
• Compare against SLA to ensure the coverage.
Cost Model
• Hardware and software costs as well as other support costs.

10. What Strategy & Model
 You need to use Strategies and models depending on
your scenario, environment, system, and situation.
 You need to carefully look at your system before
deciding what model and / or strategy you are going
to use.
 Make sure to pick an strategy before getting into
choosing a model.

11. Suggested Model
Workload Performance Model Mash-up
Represent load/stress on the environment and
components within while profiling the reaction in
order to measure & analyze the current and
predicted performance and capacity of the system.