cloud computing design considerations
Post on 11-May-2015
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Cloud ComputingDesign Considerations
Kavis Technology Consulting
5-5-13
Scalability
independence
CUSTOMERS
Tenant 1
Tenant 2
Tenant 3
Tenant 4
Tenant 5
Tenant 6
APPLICATIONS
B2C Site
B2B Site
Payments
Reporting
Inventory
Billing
No impact on other TENANTS
No impact on other
APPLICATIONS
CUSTOMERindependence
APPLICATIONindependence
Multi-tenancy
Independence privacy Highest Scalability
Highest Cost Minimal reuse Highest Complexity
Database Server
App Server
Tenant 1 App Tenant 2 App
Tenant 1 Tenant 2
Total Isolation
independence privacy optimal Scalability Cost effective
Inefficient for small tenants Moderate Complexity
Database Server
App Server
Tenant 1 Tenant 2
Shared
App2App1
Data Isolation
Least complex Most Cost effective
Lack of independence performance scalability
Data segregation
App ServerShared
Database Server
Tenant 1
Tenant 2
App 2App 1
Data segregation
App ServerShared
Database Server
Tenant 1
Tenant 2
App 2App 1
Database Server
App Server
Tenant 1 Tenant 2
Shared
App2App1
Data Isolation
Hybrid approach
ClientRequest
Elas
tic IP
174.
23.2
34.6
6
Internal IP12.345.67.89
Internal IP12.345.55.92
Response
Status 200 - OK<?xml version="1.0" encoding="UTF-8"?><customer id="1"> <custno>57832</custno> <firstname>John</firstname> <lastname>Smith</lastname> <address> <number>41</number> <Main St</street> <city>Midtown</city> <state>NY</state> <zip>12345</zip> <country>USA</country> </address> <email>jsmith@example.com</email> <phone>123-456-7890</phone></customer>
Get http:/www.mydomain.com/customer/57832Accept: application/xml
ResourceState
Doing REST Right
Client
Request
ResponseStatus 504 – Timeout
Elas
tic IP
174.
23.2
34.6
6
Internal IP12.345.67.89
Internal IP12.345.55.92
Retry
Response
Status 200 - OK<?xml version="1.0" encoding="UTF-8"?><customer id="1"> <custno>57832</custno> <firstname>John</firstname> <lastname>Smith</lastname> <address> <number>41</number> <Main St</street> <city>Midtown</city> <state>NY</state> <zip>12345</zip> <country>USA</country> </address> <email>jsmith@example.com</email> <phone>123-456-7890</phone></customer>
Get http:/www.mydomain.com/customer/57832Accept: application/xml
Get http:/www.mydomain.com/customer/57832Accept: application/xml
ResourceState
Doing REST Right
data
Right tool for the right job• Physical characteristics• Performance characteristics• Volatility• Volume
• Transaction boundaries• Retention period• Regulatory requirements
When to use RDbMS
OLTP Table based Referential Integrity ACID Transactions
Company Employees
When to use Nosql
Key Value Store Best for content caching, Fast lookups Redis, MemcacheDB
Column Store Best for huge data volumes, Fast lookups, Distributed data Cassandra, Hbase Great for static, historical data
Document Databases Best for versioning various documents and formats CouchDB, Mongo
Graph Databases Best for complex relationships, social networks Neo, Infogrid
Hybrid
Security
PrivateCloud
Customer owns it all
IaaS
Customer is responsible
for App Stack and up.
PaaS
Customer is responsible
for Application
and up.
SaaS
Customer only deals
with administering
IDs
Auditing SSAE-16: SOC 2 ISO 27001 HIPAA PCI Safe harbor Software escrow
Auditing
Monitoring
Security Performance Capacity Uptime Throughput SLA User metrics Kpis Log file analysis
Logging
IntrusionDetection
TroubleShooting
Centralized logging Lock down server access Searchable logs Easier to audit Easier to find patterns
Logging
Service Level agreementsCustomer demandsUptimePage load timeApi response timeReporting times Incident resolution
Disaster recovery
Disaster recovery
RTO (Recovery Time Objective) “Time to be back up & running”
RPO (Recovery Point Objective) “Maximum time in which data is lost”
Value“How much money is recovery worth?”
Disaster recovery
Disaster recovery
Disaster recovery
Disaster recovery
Role of Devops
Asset management Policy Enforcement Disaster Recovery Access Controls
Monitoring - Operations Deployments – App Dev Support – APP Dev & Operations
Own Outright Shared Responsibility`
Team Roles
DevOps Architects App Dev QA Scrum Master Build Management Security
Devops Help Desk Computer Operations Account Manager Field Support QA App Dev Finance
Development Support
Business ImpactsAccounting/Finance• Capex vs Opex• Pay-as-you-go Harder to forecast costs• Pricing Balance revenue with platform costs
Legal• More rigorous RFP Process• Regulations – SOC2, PCI, ISO27001, SOX, PII, Safeharbor, software escrow, etc.• Country specific rules on privacy and data
Human Resources • Cloud requires many new skillsets• Training• Recruiting (skill shortage, remote and global workers)• New incentives
Sales• Shorter implementation cycles – Sell and go• Need to understand basics of cloud computing, especially when it comes to defending security• Need to discuss issues like privacy and SLAs
Thank You
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