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Load Balancing

Nhóm thực hiện:0512288 - Ngô Vĩnh San

0512279 - Hoàng Trung Quân0512113 - Nguyễn Phước Hiền

Load Balancing

What is Load Balancing???

Why we need Load Balancing ???

How its work?

And in Windows Server 2003?

What is Load Balancing?

What is

Load Balancing?

Why we need Load Balancing?

High Availability

High Reliability

High Scalability

Round Robin DNS

203.34.23.3 203.34.23.4 203.34.23.5

Internet

DNS server

Hardware Load Balancer

Requests

Hardware Load Balancer

Clusters

203.34.23.3

203.34.23.4

203.34.23.5

Virtual IP : 203.34.23.100

Based on information in the header, cookies, or URL data

Rewrite the request’s header

How NLB works?

Create a virtual network adapter has its own IP & MAC

Using own local data

How NLB Works (Cont)?

As a filter Calculate the host should be

replyEach host performs the same

calculations independently Decide should reply or not

How NLB works(Cont)?

Unicast mode Replace MAC address

Multicast mode Replace MAC address, but

retain the MAC originalHeartbeat message

Detect a failure host Detect a new host

And in Windows Server 2003?

Server 1 Server 2

192.168.1.10/24 192.168.1.11/24

192.168.65.129/24 192.168.65.130/24

Internet

192.168.1.100/24

Switch 2

Switch 1

NLB Thank You – Question?