We will review general consulting phases and the architecture role in them. You will understand the difference between presale, discovery, and assessment phases. We will review the discovery in detail: onside and offside parts. What are the most important activities before an onside visit? We will review the usual team composition for covering discovery tasks. Types of requirements, architecture methodologies, architecture documents, and many other activities covered by architects.

3. Completed Architecture Methodology

4. Architect in Consulting

5. Architect in Consulting: presale

6. Architect in Consulting: discovery

7. Architect in Consulting: architecture drivers

8. Architect in Consulting: QAW

9. Architect in Consulting: ADD

11. Project: the best web
application
Small example

12. Best app example
Assignment
To design a business web application
persisting its data in the relational database
and enjoying high levels of reliability. The
programming language of choice is Java.
Budget limit is under 100K.

13. Architecture drivers
Business Goal:
1. Create the best web application
2. Deadline is March 2021
Constrain:
1. The programming language of choice is Java
2. Fixed price
3. Budget up to 100K
QAS:
1. Business application make a transaction for reporting feature during high load database
proxy redirect request to DB slave and return data without performance degradation; Approved
latency up to 3 sec;

14. System Context
Application DB

15. DB reliability view
4.2.1 Intent
The view defines the runtime decomposition of the server-side part of the solution. It is driven by the Business Case and
quality attribute scenario QA-1, CON-2, CON-3
4.2.2 Context
The view context is defined by the view
4.2.3 Representation
DB reliability design #21
4.2.4 Elements
4.2.5 Contracts
PGPOOL tcp end point configuration…
# Description
Element1 Responsible for a, b, c
Element2 Responsible for a, b, c
Element3 Responsible for a, b, c
<element name> <element description and responsibilities>

16. DB reliability view: representation
SQL Client Proxy
node#1
node#2
master
slave
read/write
stream logs
read
/tcp
SQL interface

17. DB reliability view: representation
4.2.6 Behavior
4.2.7 Variability
PGPool will be used for Perf, Staging, Prod. For all other env will used only single master node.
4.2.8 Reasoning
:app :PG Slave
write query
write
send WAL

18. THANK YOU!
ANY QUESTIONS?