Thod Nguyen, CTO at eHarmony, highlights the company’s advancements in matching technology, boasting over 3 billion potential matches daily and significant data handling improvements. The new compatibility matching system has reduced processing time from over two weeks to just 12 hours and resulted in marked increases in communication, paid subscriptions, and unique visitors. Future plans include expanding use cases to global and localized matching, as well as integrating real-time geo-location features.

1. Thod
Nguyen
Chief
Technology
Officer
Big Dating at eHarmony

2. social impact

3. big dating at scale
! 3B+
poten9al
matches
daily
~
25+
TB
of
data
! 60M+
mul9-­‐aDribute
queries
daily
looking
across
250+
aDributes
! 212M+
photos
~
15+
TB
of
data
! 4B+
rela9onship
ques9onnaires
~
25+
TB
of
data

4. the big win for product
Decreased
the
processing
0me
to
match
by
95%,
from
2+
weeks
to
12
hours
on
3B+
poten0al
matches/day
! 30%
increase
in
2-­‐way
communica9ons
! 50%
increase
in
paid
subs
! 60%
increase
in
unique
visitors

5. today
! Compa9bility
Matching
System
!
The
Old
!
The
New
!
Why
MongoDB
!
What’s
Next

6. compatibility matching system®
Compa0bility
Matching
System®
Match
Distribu0on
3!
Compa0bility
Matching
1!
Affinity
Matching
2!

7. Compa0bility
Matching
System®
Affinity
Matching
Match
Distribu0on
2! 3!
compatibility matching system (cont’d)
Compa0bility
Matching
1!

8. traditional search

9. eharmony matching

10. compatibility models

11. compatibility matching process

12. legacy compatibility match processor (CMP)

13. legacy compatibility match processor V.2 (CMP)

14. challenges with existing v2. design

15. challenges with existing v2. design (contd.)

16. challenges with existing v2. design (contd.)

17. challenges with existing v2. design (contd.)

18. challenges with existing v2. design (contd.)

19. new data store requirements

20. why Mongodb?

21. tradeoffs
! No
schema
=
larger
footprint
! Aggrega9on
queries
are
different
! Ini9al
configura9on
can
be
long,
manual
process

22. lessons learned
! Turn
on
the
Firehose
! Unleash
the
Chaos
Monkey
! Engage
MongoDB,
Inc.
early
–
dev
to
produc9on
! Try
to
isolate
your
queries
to
a
shard
! Run
in
shadow
mode

23. what’s next
New
matching
use
cases:
! Globaliza9on
and
Localiza9on
of
eH
site
! Careers
by
eHarmony
! Internet
of
Things
“Compa9ble”
New
use
cases
within
eHarmony:
! Real-­‐9me
geo
loca9on
based
matching
service
! Careers

24. technology stack

25. linkedin.com/in/thodnguyen
We’re
Hiring
@jobs.eharmony.com