Demonstrate ability to make architectural trade off decisions involving storage options
S3 - Parallelization, alphabetical order, randomness in URL -> SSHHDDMMYY
S3
Good for: Web Storage, Static websites, Data Lake, backup/archive
Bad For: File, System, Structured data, archive (use Glacier class), dynamic websites
S3 Storage Classes
Rebuildable asset? S3-SSR (because you can regenerate it!)
Infrequently access (Backup & Archive or DR yet still active)? S3-IA
Greater than 4 hours retrieval, cheap (archive, digital preservation)? Glacier
Use Cases
Change S3 access permissions? bucket policy
Protect S3 file from delete or overwrite? enable versioning
Protect S3 bucket deletion? backup bucket to another account
Only certain folks can delete and overwrite? enable MFA delete
Only certain folks can change state of versioning? enable MFA
S3 Cross region replication? Requires versioning on source bucket; deletes and lifecycle actions not supported
Partner upload data? Pre-signed upload URLs
Performance Use Cases
Faster download of large objects? range based GET or use CloudFront
High TPS workload? prefix the key name with a hash or reverse timestamp string
Slow file upload speed? S3 Transfer acceleration or multi-part uploads
PUT optimization on a strong network? multi-part uploads of between 25-50MB to max throughput
PUT optimization on a weak network? multi-part uploads of about 10MB to prevent upload restart
Glacier
Good for: Archive
Bad for: Immediate access, rapidly changing data
EFS
Good for: Shared File storage for EC2 multi-threaded
Bad for: Archiving, temp storage, relational data
Use Cases: >7000 file operations per sec? Max I/O else General Purpose (burstable)
EBS
Good for: EC2 Block Storage with snapshots
Bad for: temp storage (use instance store), multi-instance (use EFS), durable (use EFS/S3), Web content (S3)
EC2 Instance Store
Good for: High I/O, temp storage
Bad for: persistant storage (s3 or EBS/EFS), RDMBS (EBS), shared storage (EFS), snapshots
Use Case:
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NoSQL? I2 (365K IOPS)
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MPP/Hadoop/EMR? D2 3.5 Gib/s; Might prewarm to get max performance
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Backup instance store? no snapshotting, file backup on mounted EFS/EBS
Storage Gateway/Snowball
Use Cases:
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Low end DR = S3 directly
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Cached = less to maintain local so cheaper outlay, frequently access to small amount of data
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Stored = low latency for ALL data with EBS Snapshots; snapshots can be used as a migration tool; better for traditional instance backup
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Virtual Tape Library - fast access. 1500 tape..
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Virtual Tape Shelf - unlimited storage and OK with a 24 hour turn around time.
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Snowball - lots of data with a small pipe = loading data takes more than a week
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Import/Export - send a disk into AWS
Demonstrate ability to make architectural trade off decisions involving database options
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Use RDS for ACID, joins, complex queries
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Don’t use RDS for index and query focused, BLOB
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Use DynamoDB for indexed, query focused data, automated scalability
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Don’t use DynamoDB for prewritten apps, data larger than 400kb, BLOB, relational data
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Use EC2 for DB2, Informix or Sybase
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Use EC2 for complete control of DB
Demonstrate ability to implement the most appropriate data storage architecture
^^^See above^^^
Products with automated backup
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Redshift
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Redis
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RDS
Products that don’t automatically backup
- EC2
Determine use of synchronous versus asynchronous replication
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Multi-AZ RDS = synchronous
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RDS Read Replica = asynchronous