Single points of failure:

Expensive robust hardware

Blade

Webserver

Non-scalable load

Monolithic app

Embedded PL/SQL

business logic

Potential Problems:

Oracle on

High Perf

Disc Array

Multi-proc

DB Server

1999 2007 2008 2009 2010 2011 2012 2013 2014 2015

Oracle on

High Perf

Disc Array

Multi-proc

DB Server

Blade

Webserver

Amazon

EC2

Webserver

Middle Tier

Apps

Amazon

EC2

API server

Amazon

SimpleDB

Oracle on

High Perf

Disc Array

Multi-proc

DB Server

Blade

Webserver

Amazon

EC2

Webserver

Middle Tier

Apps

Amazon

EC2

API server

Amazon

SimpleDB

Oracle on

High Perf

Disc Array

Multi-proc

DB Server

Blade

Webserver

Amazon

EC2

Webserver

Middle Tier

Apps

Amazon

EC2

API server

Amazon

SimpleDB

Amazon

SimpleDBcassandra

Amazon

DynamoDB

1 10 100 1000

99.999%

99.99%

99.9%

99%

Rate of Change

Availa

bili

ty

Frontier of

availability/change

1 10 100 1000

99.999%

99.99%

99.9%

99%

Rate of Change

Availa

bili

ty

Frontier of

availability/change

1 10 100 1000

99.999%

99.99%

99.9%

99%

Rate of Change

Availa

bili

ty

never

• Performance

• Scale

• Availability (redundancy, dependencies,

configurations, etc.)

• Security

• Privacy

• Retiring tech-debt

If it matters, don’t delegate it!

by the line manager responsible for the –ility debts

Features,

Testing

Availability

Scalability

Performance

Tech-debt

…tradeoff…

Talk Time Title

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