From 78b1db45700c0020d1c76e3019512cf3b7c9bb5f Mon Sep 17 00:00:00 2001 From: Jet Hughes Date: Sat, 22 Oct 2022 10:28:03 +1300 Subject: [PATCH] vault backup: 2022-10-22 10:28:03 --- content/notes/25-advanced-topics.md | 38 +++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 content/notes/25-advanced-topics.md diff --git a/content/notes/25-advanced-topics.md b/content/notes/25-advanced-topics.md new file mode 100644 index 000000000..bbe1964e0 --- /dev/null +++ b/content/notes/25-advanced-topics.md @@ -0,0 +1,38 @@ +--- +title: "25-advanced-topics" +aliases: +tags: +- cosc203 +- lecture +--- + +# Datacenter networks +- 10's to 100's of thousands of hosts, often closely coupled, in close proximity + - e-business :(e.g., amazon) + - content servers: youtube etc + - search engines, data mining (e.g., google) +- challenges + - multiple applications, each server many clients + - reliability + - managing/balancing load + - procesing, networking, data bottlenecks + + +network elements +- server racks, 20-40 server blades: host +- Top of Rack (TOR) switch +- Tier 2 switches: connect to ~16 TORS below +- tier 1 switches connect to ~16 T-2s below +- border routers: connections outside +- ![](https://i.imgur.com/kFOrQ97.png) + +- multipath communcation + - rich interconnecitions so many routes + - increased throughput + - increased reliability through redundancy + +application-layer routing +- load balancer: app-layer routing +- recieves + +# Software Defined networks