Semester7

Notes of courses done/attended in semester 7 in college

books

Module 1
- intro to the course
A cloud cannot be hosted in a single system, it needs to be spread across various system

evals

defn

computing

mainframe

PCs
- not huge capacity
- interactive with user
- user can send cmds, and all
Computer Networks based systems
- decentralized
- connected
- interactive and remote processing
Grid Computing
- resources avail in ur own lab/insti etc
- give access to other ppl
- remote
- non-interactive workload bhi kar sakte
  - submit a job and leave to complete
- Personal comp ki capacity bahut small
- so this is cluster and can be connected over n/w and give access to others

grid

Data Centers
- pooling the resources
  - grid me bhi yehi tha but usme resources sab ek jagah the and academic purposes mainly
- yaha huge bandwidth connectivity
- ppl can purchase/rent it
Computing on cloud
- data centers were infrastructure : they provide infra
- cloud also provide services on top of it
- infrastr > on top of it platform > on top of it services

Cloud provides elasticity
- u can reduce or increase ur resource requirements as u go, on demand
Maintenance
- resource maintenance me I do not have to invest money
- someone else is taking care of it
- I have some system lovcally, uske kharaab hone ki prob bahut kam, Cloud pe bahut jyaada systems, so same person will take care of all those resources
- Cooling, Air conditioning of systems vagairah bhi dekhna hoga
Scalability is provided
- Cloud providers replicate data to some geographically diverse places
- so if there is some disaster in some place, data is saved at other place

vis1

vis2