Server Load Balancing for engineers

Description

Server Load Balancing course description

This two-day Server Load Balancing course introduces the concepts of SLB from the reasons to implement, through the basics and then onto details studies of load distribution, health checks, layer 7 switching and Global SLB.

What will you learn

• Explain packet paths when implementing SLB.
• Recognise the impact of different topologies.
• Evaluate SLB load distribution methods.
• Describe how load balancers can improve security.
• Explain how GSLB works.

Server Load Balancing course details

Server Load Balancing course contents

• Introduction

Concept, reasons, benefits, alternatives. Other features: Security, Caching.

• SLB concepts

Architectures, Virtual servers, real servers, Virtual IP address, health checks. DNS load balancing. Packet walk using SLB.

• Load balancing

6 modes of bonding and load balancing without SLB. ISP load balancing. Health. Distribution policies: Round Robin, least connections, weighted distributions, response time, other variations. Persistent versus concurrent.

• Layer 4 switching

L2 SLB, L3 SLB, single arm SLB, DSR, more packet walking, TCP versus UDP, Port numbers.

• Layer 7 switching

Persistence. Cookie switching, Cookie hashing, Cookie insertion, URL switching, URL Hashing, SSL.

• Health checks

Layer 3: ARP, ping. Layer 4: SYN, UDP. Layer 7: HTTP GET, Status codes, HTTP keepalives, content verification, SSL. Other application keepalives. What to do after failure and recovery.

• Security

DOS attack protection, SYN attack protection, Rate limiting: connections, transactions. SSL offload.

• Redundancy

Hot standby, Active standby, Active active. Stateful, stateless. VRRP, STP.

• GSLB

Anycasting. DNS, TTL, DNS load balancing, problems with DNS load balancing,. HTTP redirect, health, thresholds, round trip times, location.