1. Cassandra on epam cloud
Database deployed into multiple locations

2. Agenda
Motivation
Solutions with Cassandra
Cassandra on EPAM Cloud

3. Hi! @gitaroktato gitaroktato gitaroktato Oresztész Margaritisz
Lead Software Engineer
Distributed / Cloud Computing
NoSQL
Agile
DevOps
@gitaroktato
gitaroktato
gitaroktato

4. Motivation

5. motivation EPAM needs global delivery of services 25 countries
4 continents
~ 22,000 employees

6. Use-Cases ~ 1200 companies EPAM use-cases ~ 6 - 12 nodes in production
~ TPS for read / write
~ GB per node

7. SOLUTIONS WITH CASSANDRA

8. Client Client R/W R/W Peer-to-peer
Any coordinator, any writer, any reader
Client connection distribution
R/W

9. Minsk Tokyo Client Built-in multi-region deployment DHT Gossip
250 ms – 1.5 mins

10. Client
Rapid Read Protection

11. Cassandra on epam cloud

13. EPAM-BY1
AWS-AP-NORTHEAST

14. Performance Replication latency between regions
Transactions per second for the whole cluster
3 instance in Minsk & Tokyo
2 CPU
4 GB RAM

15. Replication Latency Client NTP Client READ WRITE WRITE READ Client
Measured without load on the cluster
WRITE
READ
Client

16. Replication Latency

17. Throughput

20. Summary Configuration is easy
Migrating data between locations is built-in
Load spread evenly
Dealing with network failures by default

21. ?