⚙️ AWS Batch

📅 Apr 15, 2026

AWS COMPUTE — BACKGROUND JOBS

⚙️ AWS Batch

AWS को Managed Batch Computing Service — Large scale background jobs automatically run गर्न। EC2/Fargate AWS ले manage गर्छ।

🔤 STEP 1 — "Batch" भनेको के हो? Foundation

Batch

= एकैचोटि धेरै काम

🇳🇵 Nepal Example — बिहानको पत्रिका छपाई

Kantipur अखबार रातभर एकैचोटि 2 लाख copy छाप्छ — एक-एकवटा order आउँदा छाप्दैन।

→ यही "Batch Processing" हो — एकैचोटि ठूलो काम, तुरुन्त response चाहिँदैन!

🧠 STEP 2 — Batch Computing भनेको के हो?

✅ Batch Job को characteristics:

▸ तुरुन्त response चाहिँदैन (background मा चल्छ)

▸ Large workload — हजारौं/लाखौं tasks

▸ Scheduled — रात 12 बजे, हरेक Sunday

▸ Long-running — घन्टौं लाग्न सक्छ

🇳🇵 Nepal Real Examples:

▸ Esewa को monthly statement — रात 2 बजे सबैको generate

▸ NTC को 1 लाख invoice — end of month एकैचोटि

▸ Daraz को product image resize — 10,000 images batch मा

▸ Nepal Bank को nightly transaction report

⚡ STEP 3 — AWS Batch नराखे के हुन्छ? राखे के फाइदा?

Scenario: Daraz ले नयाँ product आउँदा 10,000 product images resize गर्नुछ (thumbnail बनाउनु छ)।

❌ AWS Batch नराखे (Manual)

▸ EC2 server manually provision गर्नुपर्छ

▸ Job queue आफैं manage गर्नुपर्छ

▸ काम सकिएपछि server बन्द गर्न भुल्यो = पैसा waste

▸ Lambda use गर्दा 15 min limit exceed हुन्छ

✅ AWS Batch राखे

▸ AWS ले automatically EC2/Fargate start गर्छ

▸ 10,000 jobs automatically queue मा राखिन्छ

▸ काम सकिएपछि automatically terminate — पैसा बच्छ

▸ No time limit — घन्टौं चलाउन मिल्छ

🏗 STEP 4 — AWS Batch का 4 Main Components — यो 100% Exam मा आउँछ!

🇳🇵 Nepal Analogy — Printing Press (छापाखाना) जस्तो:

Component	के हो? (Tech)	Nepal Analogy	Exam Key
📋 Job	Actual task — container वा script जो run हुन्छ	एउटा newspaper copy छाप्ने काम	Actual work unit
📄 Job Definition	Job को blueprint — CPU, memory, Docker image specify	छाप्ने recipe — कति ink, कति paper, कुन machine	Template/Blueprint of job
🗂 Job Queue	Jobs को waiting line — priority अनुसार process हुन्छ	छाप्नुपर्ने orders को लाइन — पहिले आएको पहिले	FIFO waiting line
🖥 Compute Env	Actual servers — EC2 वा Fargate जहाँ job run हुन्छ	Printing machine नै — job run हुने ठाउँ	EC2 or Fargate — actual compute

⚠️ STEP 5 — Lambda vs AWS Batch — EXAM मा MOST IMPORTANT! यो नबुझे fail!

Exam मा सबैभन्दा बढी यही दुईको बीच confuse हुन्छ। एकचोटि राम्ररी बुझ्नुस्!

🇳🇵 Nepal Analogy: Lambda = Delivery boy (छिटो-छिटो packet deliver) | Batch = Factory worker (लामो समय एउटै काम)

Feature	⚡ Lambda	⚙️ AWS Batch
Max Time Limit	⭐ 15 minutes MAX	No strict limit ✔
Workload Type	Short, light tasks	Heavy, large-scale
Trigger	Event-driven (S3 upload, API call)	Scheduled / Queued jobs
Container Jobs	Limited	✔ Full container support
Infrastructure	Serverless — AWS manages all	EC2/Fargate AWS manages
Nepal Example	Esewa payment OTP पठाउने (2 sec)	NTC को 1 लाख invoice रात भर generate
Charge	Per invocation + duration	Only EC2/Fargate cost (Batch itself free!)

⚡ Lambda use गर्नुस् जब:
Short + Event-driven + < 15 min

⚙️ Batch use गर्नुस् जब:
Long + Heavy + Scheduled + No time limit

Service	Use When	Nepal Example	Keyword
🔥 Batch vs EMR vs Lambda vs EC2 — 4-Way Confusion Buster
⚙️ AWS Batch	Large background container jobs, long-running	1 लाख image resize overnight	Background/Batch/Container jobs
⚡ Lambda	Short event-driven, under 15 minutes	Esewa payment OTP 2 sec मा	Event-driven / Short / <15 min
🔶 EMR	Hadoop/Spark TB/PB big data analytics	NTC 10TB call log Spark ले analyze	Hadoop/Spark/TB/PB
🖥 EC2	Full manual control, custom setup	Custom web server आफैं manage	Full control/Manual/Custom

Question	Answer
❓ MCQ Practice — Exam Style
Q1. Company wants to run container-based jobs at scale without managing infrastructure. A) EC2 B) Lambda C) Batch D) RDS	C ✔ AWS Batch
Q2. Lambda को maximum execution time कति छ? A) 5 min B) 15 min C) 1 hour D) No limit	B ✔ 15 minutes
Q3. ⭐ Process 100,000 video files, each takes 30 minutes. Best service? A) Lambda B) AWS Batch C) API Gateway D) CloudFront	B ✔ Batch (30 min > Lambda 15 min!)
Q4. AWS Batch को छुट्टै service charge छ? A) Yes B) No C) Only for Fargate D) Only for EC2	B ✔ No — EC2/Fargate cost मात्र
Q5. ⭐ Tricky — Nightly financial report generate for 50,000 accounts. Which service? A) Lambda B) EMR C) AWS Batch D) RDS	C ✔ Batch (nightly + large scale)

Keyword देख्यौ	Answer	किन? One-line
⚡ FINAL EXAM CHEATSHEET — Keyword देख्यौ = Answer थाहा (100%)
Thousands/Millions of batch jobs / Container jobs at scale	⚙️ AWS Batch	Large + Background + No time limit
Long-running processing / No strict time limit / Scheduled jobs	⚙️ AWS Batch	Lambda = 15 min max, Batch = unlimited
⭐ Job takes 30 min / 1 hour / overnight	⚙️ AWS Batch	Lambda 15 min exceed = Batch! यो trap हो!
Short event / API trigger / < 15 min / Serverless	⚡ Lambda	Event-driven = Lambda
Hadoop / Spark / TB / PB big data	🔶 EMR (Batch होइन!)	Hadoop/Spark = EMR, container jobs = Batch