SoftLayer Fundamentals. Load Balancing. July, 2014

Transcription

1 SoftLayer Fundamentals Load Balancing July, 2014

2 What is Load balancing? Problems: Too much traffic to a single Web server causes the site to go offline. Having only 1 web server is a single point of failure. Solution: Replicate web site content to multiple servers (service pool) and use a network device (LB) in front of these servers to impersonate the address of the website and redirect page requests only to healthy members of the service pool. 2

3 Types of Load balancing on Softlayer Single DataCenter Single DataCenter Multiple DataCenters 3

4 Local Load Balancing -> Single DataCenter Local Load Balancing Dedicated Load Balancer with SSL Dedicated Load Balancer with SSL 6600 Netscaler VPX Multitenant Proxy pass traffic through LB Single VIP Connections/Sec SSL Offloading Optional Good fit for less than 5000 connections/sec Single Tenant Proxy One VIP assigned but can have a few more HA Option 15,000 Connections* 1+ VIP Single Tenant Proxy One VIP but can have a few more HA Option 100,000 Connections* 1+ VIP GUI interface Public and Private Network HA optional Up to Layer7 Can use Static and Portable IPs 4 Shared Low volumes Dedicated High volumes Course materials 4 may not be reproduces in whole or in part without the prior written permission of IBM. Dedicated High volumes Layer 7 balancing

5 Use Case: Local Load Balancing Computer DNS Process Load Balancer (lbsjc.softlayerportaldemo.com) Web1.softlayerportaldemo.com Web3.softlayerportaldemo.com Web2.softlayerportaldemo.com 5

6 Global Load Balancing -> Multiple DataCenters Global Loadbalancer DNS Requests/Sec Does not Pass traffic; only responds to DNS requests For Datacenter to Datacenter Loadbalancing Shared DNS route 6 6

7 Use Case: Global Load Balancing Global Loadbalancer DNS Process Computer Load Balancer 7 web1 web2 Web4 San Jose Washington

8 Load Balancer Options: All Local Load Balancing Dedicated Load Balancer with SSL Dedicated Load Balancer with SSL 6600 Global Loadbalancer Netscaler VPX Multitenant Proxy pass traffic through LB Single VIP Connections/Sec SSL Offloading Optional Good fit for less than 5000 connections/sec Single Tenant Proxy One VIP assigned but can have a few more HA Option 15,000 Connections* 1+ VIP Single Tenant Proxy One VIP but can have a few more HA Option 100,000 Connections* 1+ VIP DNS Requests/Sec Does not Pass traffic; only responds to DNS requests For Datacenter to Datacenter Loadbalancing GUI interface Public and Private Network HA optional Up to Layer7 Can use Static and Portable IPs 8

9 Easy to order Datacenter Loadbalancer Pay per connection per second Netscaler VPX Global Loadbalancer 9

10 References us#!/wiki/wb f17_4b0c_85ea_df1aadd645c1/page/softlayer%20nuggets%20- %20Bite%20Sized%20Information%20about%20SoftLayer bfc8-a3d32a2a36d1/page/f7fd2b ab-8fb4-fc2e36c03050/attachment 10

11 11