Sean Hsieh JenHsuan

	ALB	NLB	GWLB
Support protocol	Layer 7	Layer 4	Layer 3
Latancy	Higher than NLB	Lower than ALB	-
Cross-zone lb default	Enabled	Disabled	Disabled
Provide DNS?	o	x	x
Provide fixed IP?	x	o	x
Use case	micro services/container-based apps/HTTP/HTTPS	SSH	-
Support multiple SSL?	o (need SNI)	o (need SNI)	-

	Cluster	Spread	Partition
Pros	great networking/low-latency	Reduce simultaneous failure	-
Cons	In single AZ	limit to 7 per AZ per group	Up to 100 of EC2 instances
Use case	HPC workloads/node-to-node communication	maximize the high availability	Distributed ETL/HDFS/HBase/Cassandra/Kafka

	S3 File Gateway	Volume Gateway	Tape Gateway
Supported Protocols	NFS/SMB	iSCSI/SMB/NTFS	-
Transfer to S3?	standard/IA/One Zone-IA/Intelligent	-	-
Backup to S3	-	use iSCSI protocol	-
Support AD?	o	o	x
Modes	x	Cached volumes/Stored volumes	x

	Compliance Mode	Governance Mode	Legal Hold
Feature	Versions can’t be overwritten or deleted	Version and settings can’t overwrite/delete/alter	Protect the object indefinitely (independent from retention period)
Permission?	x	Some users	Using S3:PutObjectLegalHold IAM permission

	Service	Feature
	Glue Job Bookmarks	prevent re-processing old data
	Glue Elastic Views	Combine and replace data across multiple data source stores using `SQL`
	Glue DataBrew	clean and normalize data using `pre-built` transformations
	Glue Studio	new GUI to create/run/and monitor `ETL` jobs in `Glue`
	Glue Streaming ETL	compatible with Kinesis Data Streaming/Kafka/MSK (managed Kafka)
	Glue Triggers	allows you to automate the execution of Glue Jobs/Crawlers/or Workflows based on certain conditions

	gp2/gp3 (SSD)	io1/io2 (SSD)	st1(HDD)	sc1(HDD)
Feature	most cost-effective storage	critical applications with sustained IOPS	frequently accessed/throughput-intensive	Lowest-cost HDD volume designed for frequently accessed
Use Case	low latency	great for database workloads	big data/log pprocessing	Scenario where the lowest cost is important
Can be boot volumes	o	o	x	x
EBS multi-attach feature	x	o	x	x
Capacity	1GB ~ 1TB	-	-	-

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