1. GlassFish in the Real World
Mike Croft

2. GlassFish in the Real World
Introductions

3. Who Am I?
C2B2 Expert Support consultant
Ex-IBM
Snowboarder
@croft

4. Who are you? CS/Software Engineering/etc students?
Anyone know what Java EE/SE/ME is?

5. Why Are We Here? What’s a “Middleware”? What is RASP?
Why is it important?
How do I do this for real?

6. GlassFish in the Real World
What’s a “middleware”?

7. What’s a “Middleware”? Internet Web Browser The Middle JEE Application
Server
Internet
Web Browser DB
Fire wall
Load
Balancer
JEE
Application
Server
The Middle

8. GlassFish in the Real World
What is “rasp”?

9. Non-Functional Requirements These Are Priority 1 Requirements!
What is RASP?
Non-Functional Requirements
Reliability
Availability
Scalability
Performance
These Are Priority 1 Requirements!

10. RELIABILITY What is RASP? Customers need confidence
No Data Loss or Corruption
Prevents Exploits
Fraud
Reputation Risk
Legal Challenge
Customers need confidence
in their transactions

11. AVAILABILITY What is RASP? Available for customers
No availability? No transactions
Transactions = £££
Receive your P45 if you can’t sort it!

12. AVAILABILITY What is RASP? Systems Complex Systems must be 24/7
No Maintenance Windows
Online Upgrade
Graceful Degradation
Failure Detection

13. Overall Availability = 0.99*0.99*0.99 = 97%
What is RASP?
AVAILABILITY
System 1 2 3
99% Availability
Overall Availability = 0.99*0.99*0.99 = 97%
How many days downtime?

14. AVAILABILITY What is RASP? Redundancy Decoupling 99% Availability
System 1
99% Availability
System 2
System 3
System
99% Availability
Pair = 1 – (0.01*0.01) = 99.99%
Overall = x x = 99%
Overall = 99%

15. AVAILABILITY What is RASP?
Cluster
Node 1
Cluster
Node 2
Cluster
Node 3
Cluster Availability = 99.99%
ONLY IF 2 Nodes can cope with peak load Otherwise Availability is only 99%

16. Without a reduction in performance!
What is RASP?
SCALABILITY
Add hardware in response to demand
Without a reduction in performance!

17. Cloud Enables Elastic Scalability
What is RASP?
SCALABILITY
Success of the Business or Service
Growth of Mobile
Huge Variation of Load through a period
Sudden Large Spikes due to events
Cloud Enables Elastic Scalability

18. SCALABILITY What is RASP? Scale UP Add hardware to a single host
Add CPUs, memory or disk.
Typical way of scaling databases
Expensive for Price/Performance
Increase server density
Image credit: Cisco

19. SCALABILITY What is RASP? Scale OUT Add Additional Servers
Add Load Balancer
Distribute traffic across the servers
Much Cheaper than Scale Up
Has HA benefits
Image credit: Cisco

20. What is RASP?
SCALABILITY
Nirvana

21. SCALABILITY What is RASP? Typical Architecture Node 1 Load Balancer 34 2
Database
Nodes Host
Stateless Services
Database contains
Persistent State

22. How fast does a single transaction take to execute?
What is RASP?
PERFORMANCE
How fast does a single transaction take to execute?
Faster Performance = Happier Customers
Faster Performance = More Transactions

23. PERFORMANCE What is RASP? Raw Algorithmic Performance
Resource Limitations
Not enough cpu, disk, memory
Resource Contention
Locks
IO Latency
Network, Disk

24. Time delay in requesting an operation and it being initiated
What is RASP?
PERFORMANCE
LATENCY
Time delay in requesting an operation and it being initiated
Key factor in large scale distributed applications
Typically not taken into account during development

25. PERFORMANCE What is RASP? Latency Factors Network Distance
Network Reliability
Data Size
Operation Granularity
Resource Contention
JVM GC

26. Move the Data and Processing
What is RASP?
PERFORMANCE
Solution?
Move the Data and Processing
Close Together

27. GlassFish in the Real World
How do I do this for real?

28. How Do I Do This For Real?
Acquire Servers

29. How Do I Do This For Real? Acquire GlassFish 4

30. How Do I Do This For Real? Configure GlassFish asadmin tool
asadmin start-domain domain1
asadmin change-admin-password --user admin
asadmin enable-secure-admin asadmin restart-domain
asadmin tool
Admin console

31. How Do I Do This For Real?
Demo!

32. GlassFish in the Real World
Any questions?