# AWS-SA-Notes

## S3: Object based storage
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## CloudFront:
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##EC2:
### EC2 Types in pricing
	1. On Demand
	2. Reserver
	3. Spot
	4. Dedicated Hosts

### EC2 types
	1. D (D2) (Storage Optimized) - Dense storage - File server/Data wearehousing
	2. I (I2) (Storage Optimized) - High speed storage - NOSQL DB, Data Warehousing
	3. R (R4) (Memory Optimized) - Memory Optimized  - Memory intensive app / DB
	4. T (T2) (General Purpose) - Low cost general purpose - Web server, small DB
	5. M (M4) (General Purpose) - General purpose - Application Server
	6. C (C4) (Compute Optimized) - Compute Optimized - CPU intensive Apps/ DB
	7. G (G2) (GPU Instances) - Graphic intensive - Video encoding/ 3D video steaming
	8. F (F1) - Field programmable gateway - Hardware acceleration for your code
	9. P (P2) (GPU Compute) - Graphics/ General purpose GPU - Machine learning, Bit coin mining
	10. X (X1) (Memory Optimized) - Memory Optimized - SAP HANA/ Apache Spark

### EBS: Block based storage
	1. General Purpose SSD (GP2) - less than 10,000 IOPS
	2. Provisioned IOPS SSD (IO1) - more than 10,000 IOPS - no sql DB or large DB
	3. Throughput optimized HDD (ST1) - Big Data/ Data wearehouse/ Log processing
		cannt boot volume
	4. Cold HDD (SC1) - Low coast - File server
		cannt boot volume
	5. Magnetic (Standerd) - Lowest, Infrquently data access

### RAID: Redundant Array of Independent Disks
	1. RAID 0 - Striped, No Redundancy, Good Performance - Gaming PC
	2. RAID 1 - Mirrored (copy exact copy to another disk), Redundancy(If one disk failed, you can still use the RAID array using other disk)
	3. RAID 5 - Good for reading, AWS DOESNOT RECOMMAND ever putting Raid 5's on EBS
	4. RAID 10 - Combination of RAID 0 and 1, Striped and Mirrored, Good performance
		and good redundency