Wiki Article · Cinematic

Cache

Yeh article cache ka complete guide hai — woh temporary, fast-access storage layer jo frequently…

Overview

Cache — Quick Facts

📌

Property: Detail

🎯

Topic: Cache

⚡

Also Known As: Caching, cache memory, cache layer

🔑

Category: Performance / Scalability /…

Topic 1

Infobox

📚 | Property | Detail | |---|---| | Topic | Cache | | Also Known As | Caching, cache…

Topic 2

What Is Cache?

💡 Cache ek temporary storage layer hai jo frequently accessed data ko fast-access location…

Topic 3

Where Cache Is Used

🎯 | Cache Type | Location | What It Stores | Typical Speed | |---|---|---|---| | CPU L1…

Topic 4

CPU Cache (Hardware)

💡

CPU cache cache lines me data…

🔑

Typical cache line size: 64 bytes

⚡

Ek byte chahiye to bhi poori…

🎯

Yahi reason hai ki sequential…

Topic 5

Cache Hit vs Cache Miss

🔑 | Term | Meaning | Effect | |---|---|---| | Cache Hit | Requested data cache me mil gaya…

Topic 6

Caching Strategies

✨ Write Strategies | Strategy | How It Works | Pros | Cons | |---|---|---|---| |…

Topic 7

Cache Eviction Policies

💡

Har access pe item "recently used"…

🔑

Jab cache full ho — list ke bottom…

⚡

Implementation: usually doubly…

🎯

Redis default eviction: allkeys-lru

Topic 8

Application-Level Caching

💡

PHP files har request pe parse +…

🔑

OPcache compiled bytecode memory…

⚡

Next request pe parse skip →…

🎯

Production me hamesha enabled hona…

Topic 9

HTTP Caching

📚 Cache-Control Header | Directive | Meaning | |---|---| | public | Koi bhi cache store kar…

Topic 10

Browser Cache

💡

Filename versioning: style.v2.css…

🔑

Query string: style.css?v=12345

⚡

Content hash: style.a1b2c3.css…

🎯

Modern PWAs (Progressive Web Apps)…

Topic 11

CDN Caching

🎯 What Is CDN? CDN (Content Delivery Network) = globally distributed servers jo content ko…

Topic 12

Database Caching

💡

MySQL/MariaDB me InnoDB engine ka…

🔑

Data pages + index pages memory me…

⚡

Buffer pool size = available RAM…

🎯

Hit rate 99%+ target karo: SHOW…

Topic 13

Cache Invalidation

💡

Stale data risk: Cache me purana…

🔑

Timing: Kab invalidate karna hai —…

⚡

Distributed systems: Multiple…

🎯

Dependencies: One data change…

Topic 14

Distributed Caching

💡

Traditional hashing me node…

🔑

Consistent hashing me sirf 1/N…

⚡

Redis Cluster aur Memcached dono…

🎯

Virtual nodes (vnodes) = better…

Topic 15

Cache Stampede

🌟 Problem Cache stampede (thundering herd) tab hota hai jab: 1. Popular cache key expire…

Topic 16

Cache Hit/Miss Flow — Mermaid Diagram

🚀 `mermaid flowchart TD REQ["Client Request"] CHECK{"Cache me hai?"} HIT["Cache…

Topic 17

Common Mistakes

💡

Frequently accessed hai

🔑

Computation/fetch expensive hai

⚡

Change rate slow hai

🎯

Include: relevant parameters (user…

Topic 18

Best Practices

💡 1. Set Appropriate TTL Data type ke basis pe TTL decide karo. Static assets: hours/days.…

Topic 19

Interview Perspective

🎯 Q1: Cache kya hai aur cache-aside pattern kaise kaam karta hai? A: Cache ek temporary…

Topic 20

Glossary

⭐ | Term | Definition | |---|---| | Cache | Temporary fast storage for frequently accessed…

Comparison

Cache Hit vs Cache Miss

⚖️

Cache Hit: Requested data cache me mil…

⚖️

Cache Miss: Data cache me nahi tha

⚖️

Hit Rate: Hits / (Hits + Misses) × 100

Diagram

Visual Flow

📊 Diagram visualization — details in narration

Quiz — Question 1

Cache ka sabse sahi definition kya hai?

Quick Quiz

Quiz — Question 2

Cache ka 'Topic' kya hai?

Complete! 🎉

Cache Complete!

Aliens Wiki · HIEN · Cinematic Knowledge

✅

Cache Complete

➡️

Cache

Cache — Quick Facts

Property: Detail

Topic: Cache

Also Known As: Caching, cache memory, cache layer

Category: Performance / Scalability /…

Infobox

What Is Cache?

Where Cache Is Used

CPU Cache (Hardware)

CPU cache cache lines me data…

Typical cache line size: 64 bytes

Ek byte chahiye to bhi poori…

Yahi reason hai ki sequential…

Cache Hit vs Cache Miss

Caching Strategies

Cache Eviction Policies

Har access pe item "recently used"…

Jab cache full ho — list ke bottom…

Implementation: usually doubly…

Redis default eviction: allkeys-lru

Application-Level Caching

PHP files har request pe parse +…

OPcache compiled bytecode memory…

Next request pe parse skip →…

Production me hamesha enabled hona…

HTTP Caching

Browser Cache

Filename versioning: style.v2.css…

Query string: style.css?v=12345

Content hash: style.a1b2c3.css…

Modern PWAs (Progressive Web Apps)…

CDN Caching

Database Caching

MySQL/MariaDB me InnoDB engine ka…

Data pages + index pages memory me…

Buffer pool size = available RAM…

Hit rate 99%+ target karo: SHOW…

Cache Invalidation

Stale data risk: Cache me purana…

Timing: Kab invalidate karna hai —…

Distributed systems: Multiple…

Dependencies: One data change…

Distributed Caching

Traditional hashing me node…

Consistent hashing me sirf 1/N…

Redis Cluster aur Memcached dono…

Virtual nodes (vnodes) = better…

Cache Stampede

Cache Hit/Miss Flow — Mermaid Diagram

Common Mistakes

Frequently accessed hai

Computation/fetch expensive hai

Change rate slow hai

Include: relevant parameters (user…

Best Practices

Interview Perspective

Glossary

Cache Hit vs Cache Miss

Cache Hit: Requested data cache me mil…

Cache Miss: Data cache me nahi tha

Hit Rate: Hits / (Hits + Misses) × 100

Visual Flow

See Also

Redis — Popular in-memory cache +…

Memcached — Simple high-throughput…

CDN — Content delivery network…

HTTP — HTTP caching headers

Database — Database caching layers

Latency — Response time…

Quiz — Question 1

Quiz — Question 2

Cache Complete!

Cache Complete

Redis — Popular in-memory…