Easy Notes of Cloud Computing unit- 5 @Computer Diploma

Description

5.1 Cloud & Ubiquitous Computing

Ubiquitous Computing (Pervasive Computing) is the idea of computing being available everywhere and at any time, often through small, interconnected devices.

• Cloud Trends:

  • Edge Computing: Processing data near the source (devices) instead of a distant data center to reduce latency.

  • Serverless Computing: Developers write code without managing servers; the cloud “disappears” into the background.

  • 5G/6G Integration: Providing the high-speed, low-latency “pipe” needed for real-time cloud access.

  • Distributed Cloud: Public cloud services distributed to different physical locations (like on-premises or at the edge) but managed centrally.

5.2 Enabling Technologies in IoT

These technologies allow physical objects to communicate with the cloud:

• RFID (Radio Frequency Identification): Uses electromagnetic fields to identify and track tags attached to objects (e.g., contactless payments, inventory).

• WSN (Wireless Sensor Networks): Groups of sensors that monitor conditions (temp, pressure) and pass data to a central cloud gateway.

• ZigBee: A low-power, short-range wireless protocol ideal for “mesh” networks in smart homes or factories.

• GPS (Global Positioning System): Provides precise geographical location data, allowing the cloud to track assets globally.

5.3 Innovative IoT Applications

• Healthcare (ECG Analysis):

  • Process: Wearable sensors capture heart signals $\rightarrow$ Data sent to Cloud $\rightarrow$ AI analyzes the ECG for arrhythmias $\rightarrow$ Doctor receives an instant alert.

  • Benefits: Real-time monitoring, early detection, and reduced hospital visits.

• CRM & ERP (Business Apps):

  • IoT-Enabled CRM: Customer devices report their own status (e.g., a printer ordering its own ink when low).

  • IoT-Enabled ERP: Real-time supply chain tracking; machines on a factory floor report maintenance needs before they break.

5.4 Cloud Platforms & Benefits

Public Cloud Giants

• Amazon EC2: Provides Virtual Machines (compute power) that scale up or down instantly.

• Amazon S3: Highly durable Object Storage for photos, videos, and backups.

• Google App Engine (GAE): A PaaS platform; developers just upload code, and Google handles all scaling and infrastructure.

Cloud Management & Interoperability

• OpenStack: An open-source platform used to build Private Clouds using standard hardware.

• CloudStack: A simpler, “turnkey” open-source alternative to OpenStack for managing IaaS.

• OpenNebula: A lightweight, flexible tool for managing virtualized data centers and hybrid clouds.

• Intercloud: The “Cloud of Clouds”; a model that allows different cloud providers to share resources and work together seamlessly.

Quick Recall Keywords for Exams:

• Mesh Networking: How ZigBee devices talk to each other to extend range.

• Low Latency: The main goal of Edge Computing (speed).

• Vertical Cloud: Cloud platforms built specifically for one industry (e.g., Healthcare Cloud).

• Vendor Lock-in: The risk of being stuck with one provider (solved by OpenStack/Intercloud).