WelcomeAmir ish-Shalom, Chief Architect

What we do

• Messages & Stickers

• Audio messages & video

• Group conversations

• Full multiple device support

• HD video & phone calls

• Viber out

We are adding new functions

TO become even more SOCIAL

‘Imagine if you could listen in

on somebody else’s conversation?’

Public Chats

• Chat owners

• Participants

• Followers

Public Chats -

Features• ‘Likes’

• Live updates to all online followers

• Invite a friend to follow

• Search & explore

Games• Developed by 3rd parties

• Viber characters & style

• “Viber Connect”

• Friends list

• Messaging via Viber:

• Invites

• Gifts & “bragging”

• User to user communication

Viber Usage

Everybody’s vibing

• 530+ Million users worldwide

• 236+ Million Monthly Active Users

• 1+ Million new users every day

• Billions of messages sent every day

• iOS, Android, desktop (and more)

Strong growth in

2014NOW OVER 530 million Viber unique ids

1

9

4

0

7

4

1

2

5

1

9

4

2

8

0

3

7

5

46

0

Jun/11 Dec/11 Jun/12 Dec/12 Jun/13 Dec/13 Jun/14 Nov/14

*Unique IDs: Unique phone numbers excluding deactivations (Millions of unique users)

2015-01

2014-12

2014-11

2014-10

2014-09

2014-08

2014-07

2014-06

2014-05

2014-04

2014-03

2014-02

2014-01

2013-12

2013-11

2013-10

2013-09

2013-08

2013-07

2013-06

2013-05

2013-04

2013-03

2013-02

2013-01

2012-12

2012-11

2012-10

2012-09

2012-08

2012-07

2012-06

2012-05

2012-04

2012-03

2012-02

2012-01

2011-12

2011-11

2011-10

2011-09

2011-08

2011-07

2011-06

2011-05

2011-04

2011-03

2011-02

2011-01

Strong Growth in

2014In 2014 vs. 2013 there was:

• 2.5x growth in talking minutes

• 3x growth in messages

• 10x growth in group messages

a truly global platformNorth

America7.2%

Central &south

America

9.0%

Westerneurope19.9% eastern

europe11.7%

Middleeast

14.2%

africa8.0%

Asia & Asia

pacfic29.9%

Source : Viber Cumulative

activated users, percentage

share by region. Oct 31, 2014

Viber global PenetrationViber is used by 12% of the world’s mobile device

owners

WhatsApp LINE KakaoTalk WeChat

39

%

12

%10

%6

%4

%

Percentage of

world’s mobile users

(excl. China) who

uses each app

Source: GlobalWebIndex Q2

2014, published Sep25 2014

Top 5 global

marketsRussia

28m

India

32m

uk

14m

Brazil

18m

america

30m

*Unique IDs: Unique phone

numbers excluding deactivations

Database Architecture

Viber DB Architecture – 1st

Generation

In-house

in-memory DBApplication ServersViber

Clients

Viber DB Architecture – 2nd

Generation

Redis Cache MongoDB Cluster

Redis Clusters

Application ServersViber

Clients

Redis Sharder

Redis Sharder

2nd Generation DB Architecture

Problems• MongoDB performance

• MongoDB does not scale well with many application servers

• Redis – In-memory database with no sharding

• Redis Sharder – Not manageable and robust enough

3rd Generation DB Architecture

Requirements• High performance

• Large data sets

• Scalable

• Robust

• Backed-up

• Always on

• Easy to monitor

• Prefer single DB solution

Solution:

Viber DB Architecture – 3rd

Generation

Application ServersViber

Clients

Couchbase

Backup

ClusterCouchbase

Clusters

XDCR

Migrating from 2nd to 3rd

Generation DB’s• Migrate a live system

• Zero downtime

• No data loss

• Consistent data

MongoDB Cluster

Redis Clusters

Couchbase

Clusters

CouchBase Usage

CouchBase Usage

• Over 2 Million operations per second

• ~200 Couchbase servers in 8 different clusters

• Almost 1000 application servers

• Cluster sizes between 3 to 51 nodes

• Clusters have between 0-2 replicas (most have 1 replica)

CouchBase Versions

• Most clusters using CB v2.51

• 2 clusters have been migrated to CB v3.02

• Currently testing CB v3.02 and planning migration

How a one line mistake can

create 500,000 ops

Launch of a new product

21 node cluster with Over

800,000 OPS

Questions?

Thank You