Data Networking for Developers

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D*ata Networking f*or D*evelopers

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About m*e IT Infrastructure Architect CCS World’s Oldest Intern Foxycart [email protected] www.binarydelusions.com

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O*verview • Why this is so important to you? • Networking Overview • Firewalls • Load Balancers • Caching • Data Flow Mapping • Application Performance Management • Snifﬁng for Troubleshooting

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Why is this So Important? • n-Tier Architectures • RESTful APIs • Service Oriented Architectures • HATEOAS

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An Ethernet Frame Frame Ethernet Preamble SOF Dest MAC Source MAC Len Data FCS Data Link Packet Data Dest IP Source IP Misc HCS Opt Pad IP Network Segment Data Dest Port Source Port Opt Pad TCP Misc CS Transport

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Firewalls • Packet Filtering • Closed from outside • Allow return trafﬁc to a request from an inside source

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Firewalls: Allowing Traffic f*rom O*utside • “Poking Holes” • Access Control List Entries (Network) • Network Address Translation (NAT) (Transport) • Source, Destination, Protocol, Port

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Firewall P*ositioning Web Service Database Load Balancer Firewall ACL NAT

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Firewalls: Deeper • Stateful Inspection • Intrusion Prevention • Application • Next Generation

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The D*ecesion P*oint

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L*oad Balancers • Local/Global • VIPs • Server Farms • Real Servers • SSL Ofﬂoading • Stickiness

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Firewall P*ositioning Web Service Database Load Balancer Firewall Server Farm VIP

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L*oad Balancers: Types • Response Time • Bandwidth • Hashes (address, content, cookie, head, url) • Connection Count • Least Loaded (health) • Round Robin

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Caching • Reducing Expensive Calls • Results vary by architecture... Greatly • Changing rapidly

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Caching: Where • Content Delivery Networks • Hosts (FusionIO) • Content Network Devices (Switches, Load Balancers) • SANs (FastCache)

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D*ata Flow Web Service Database Load Balancer Firewall

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D*ata Flow: Sniffed

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Sniffing D*emo

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Application P*erformance Monitoring

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New Relic

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Transaction Tracing

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App Server Stats

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D*ashboarding

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Who is Responsible?

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Make i*t Simple

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