Scaling with AWS

InterviewStreet www.hackerrank.com

SCALING WITH AWS

HARISHANKARANCO-FOUNDER

HACKERRANK.COM


About Me

• Engineer/Co-Founder/CTO• Started Interviewstreet in 2009•We are 20 member team. • Disrupting hiring space.


Before AWS

• Linode•Cheap • Easy to setup•Best, when bootstrapped


IEEEXTREME

IEEEXtreme is a global challenge in which teams of IEEE Student members, supported by an IEEE Student Branch, advised and proctored by an IEEE member, compete in a 24-hour time span against each other to solve a set of programming problems.


20112012

2013


ACM Programming ContestYahoo HackathonCampus Hiring for Amazon, Facebook, Flipkart in India

Resource intensive, autoscale lets us sleep peacefully.


MIGRATIONS


SSHFS -> S3

• Mount the directory of file server in all other servers.• Pain if you reboot the client.• Scary, if the main server reboots.• rm –rf * haunts you.


ZMQ -> SQS

• Webservers push to ZMQ• Codecheckers poll ZMQ• Easy to setup, but during high load, ZMQ

server takes the hit.• Single point of failure.• WISHLIST – Priority for SQS Queues


EC2 MySQL -> RDS

• The BEST decision we’ve made• Scaling, Read replicas were made super

easy.• Saved us many times from disasters.


THANK YOU

Scaling with AWS

Technology

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