micro service challenges - microxchgmicroxchg.io/2015/slides/01_06_micro_service_challenges.pdf ·...

Copyright © 2015 by Fred George. All rights reserved.

Fred George [email protected] @fgeorge52

µService Challenges

1


✦ Confluence of technologies ✦ Cloud computing ✦ Bandwidth ✦ Languages (and supporting frameworks)

✦ Confluence of business needs ✦ Silicon Valley innovators as role models ✦ Accelerating business needs ✦ Reduction of entry barriers for niche competitors

Why MicroSerices Now?

2


Challenge 1

3

Synchronous or Asychronous

Copyright © 2015 by Fred George. All rights reserved.Copyright © 2012-2013 by Fred George. All rights reserved. 5

Chad Fowler vs. Fred George✦ Chad: Use Synchronous as default

✦ Algorithms typically described serially ✦ Programmer understanding / productivity

✦ Fred: Use Asynchronous as default ✦ Robustness should be primary goal ✦ Supports better de-coupling ✦ Teach the programmers


Rapids, Rivers, and Ponds

6


Asynchronous Services

7

Service

B u s


Asynchronous Services

7

Service

B u s

Need

Service

Need

Service

Need

Sol’n’sSol’n

Choose Sol’n

✦ Variants easy✦ Graceful degradation


Sample µServices in Action

9

High Capacity Message Bus

car_rent

Legacy Web

Server

User Offers

Membership

Segmentation

Location Offers Brand Offers

Copyright © 2015 by Fred George. All rights reserved. 11

car_rent

Legacy Web

Server

User Offers

Membership

Segmentation


Page served… client accessible

Car_Rent.com Login


B A

12

car_rent

Legacy Web

Server

User Offers

Membership

Segmentation


Page served… client accessible

Car_Rent.com Login

AB

A BA B


Brand OffersLocation Offers

B A

14

car_rent

Legacy Web

Server

User Offers

Membership

Segmentation

Sally logs in as Member

Car_Rent.com Login

A B

Sally



CD B A

14

car_rent

Legacy Web

Server

User Offers

Membership

Segmentation


Car_Rent.com Login

A B

Sally

CD



CD

B A

15

car_rent

Legacy Web

Server

User Offers

Membership

Segmentation


Car_Rent.com Login

A B

Sally

CD



CD

B A

16

car_rent

Legacy Web

Server

User Offers

Membership

Segmentation


Car_Rent.com Login

A B

Sally

CD


F E


CD

B A

17

car_rent

Legacy Web

Server

User Offers

Membership

Segmentation


Car_Rent.com Login

A B

Sally

CD

EF


F E


CD

B A

18

car_rent

Legacy Web

Server

User Offers

Membership

Segmentation


Car_Rent.com Login

A B

Sally

CD

EF


F E


CD

B A

18

car_rent

Legacy Web

Server

User Offers

Membership

Segmentation


Car_Rent.com Login

A B

Sally

CD

EF

C

G

CG



CD

20

car_rent

Legacy Web

Server

User Offers

Membership

Segmentation


Car_Rent.com Login

A B

Sally

EF

CGC

G



CD

21

car_rent

Legacy Web

Server

User Offers

Membership

Segmentation


Car_Rent.com Login

A B

Sally

EF

CGC

G



CD

21

car_rent

Legacy Web

Server

User Offers

Membership

Segmentation


Car_Rent.com Login

A B

Sally

EF

CGC

GC

H

CH



22

car_rent

Legacy Web

Server

User Offers

Membership

Segmentation


Car_Rent.com Login

Sally

ECG

CCH

H

H C EH EC



23

car_rent

Legacy Web

Server

User Offers

Membership

Segmentation

Sally looks in HoustonE

CGC

CH

HLocation: Houston

H

EC


Deconstructing the Database

Challenge 2

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How Many Databases?✦ Fortune 100 View:

✦ Entity-oriented; consistent ✦ As few as possible

✦ Micro-service view: ✦ DB per micro-service ✦ Poly-glot (various NoSQL, SQL) + event bus ✦ 10% writable; fewer transactional

25



26


car_rent

Legacy Web

Server

Membership

Segmentation


Redis

SolutionGathering

EventPublishing

300msResponder



27


car_rent

Legacy Web

Server

User Offers

Segmentation


Key-valueMembershipEnrichment

JoinOffers

NightlyETL


µServices or Clojure

Challenge 3


✦ Conceptualization (Job) ✦ Every service has one job ✦ If two jobs, make two services

✦ Encapsulation ✦ Service has its own persistence ✦ If shared persistence, just one service!

Services Like OO Classes

Copyright © 2012-2013 by Fred George. All rights reserved. 29


Clojure Loves Shared Data

30

X f o r m

X f o r m

X f o r m

X f o r m

? ? ?

Copyright © 2015 by Fred George. All rights reserved.Copyright © 2012-2013 by Fred George. All rights reserved.

3 Companies - 3 Variants

31

Number

Languages

Coupling

Forward 2008 - now

300+

Ruby, Node.js, Clojure, R, …

DB w cron, RESTful, Kafka bus

Daily Mail 2012 - now

3 + dozens

Node.js, Clojure

RabbitMQ bus

Outpace 2013-now

25

Clojure

Orchestraton, RabbitMQ bus

>>

>>


A New Hope…


Choosing Architecture and Frameworks

Challenge 4

33


No Design Patterns Book Yet…

Challenge 5

35


Conferences / Meetups Starting…

36


What is a MicroService?

Challenge 6-n

37


Taxonomy May be Useful (before it’s too late)

38

✦ Synchronicity ✦ Primary API access to service

✦ Average size / number ratio of services ✦ Zones for clarity of labeling

✦ DB / service ratio ✦ Expose potential hinderances to rapid deployment


Fred George [email protected] @fgeorge52

µService Challenges

39

micro service challenges - microxchgmicroxchg.io/2015/slides/01_06_micro_service_challenges.pdf ·...

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