Cloud Data Storage is a service where data is stored on remote servers (in data centers) and accessed via the internet, instead of storing it on a local computer.
👉 In simple words: Saving your data online instead of your device
User → Internet → Cloud Server → Data Stored
Stores data as objects (data + metadata + ID)
Stores data in blocks (fixed-size chunks)
Stores data as files in folders
| Type | Structure | Use Case |
|---|---|---|
| Object | Objects | Media files |
| Block | Blocks | Databases |
| File | Files/Folders | Documents |
User
↓
API / Interface
↓
Storage System
↓
Distributed Servers (Data Centers)
✔ Scalability (increase storage anytime) ✔ Durability (data is safe) ✔ Availability (access anytime) ✔ Redundancy (multiple copies stored) ✔ Security (encryption, authentication)
✔ Prevents data loss
✔ Cost-effective (pay-as-you-go) ✔ Easy access from anywhere ✔ High scalability ✔ Automatic backup ✔ Disaster recovery
✔ Internet dependency ✔ Security risks ✔ Data privacy issues ✔ Limited control ✔ Possible downtime
Cloud Storage
/ | \
Server1 Server2 Server3
| | |
Data Data Data (Copies)
👉 Data is stored in multiple servers for safety
✔ Backup systems ✔ Big data storage ✔ Video streaming ✔ Social media platforms ✔ Business data storage
👉 Define cloud data storage 👉 Explain types of cloud storage 👉 Difference between object, block, file storage 👉 Advantages and disadvantages 👉 What is data replication?
| Topic | Key Idea | Example |
|---|---|---|
| Cloud Storage | Store data online | Google Drive |
| Object Storage | Data as objects | Videos/images |
| Block Storage | Data in chunks | Databases |
| File Storage | Folder structure | Documents |
| Replication | Multiple copies | Backup systems |
| Benefits | Scalable, low cost | — |
| Challenges | Security, internet | — |
✔ Remember 3 storage types (Object, Block, File) ⭐ ✔ Learn data replication concept ✔ Understand advantages vs disadvantages ✔ Use diagrams in exams
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