S3 - Simple Storage Servce

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)Object based storage

Flat files

File size 0Byts to 5TB

Unlimited

Files are stored in Buckets

Bucket names are unique

Add news item - can read quickly - BUT update & delete may take a while.

(Consistency modal for new objects READ after WRITE)

S3 eventual consistency - overwrites PUTS and DELETE

S3 is object base . Consist of

Key - name

Value - data

Version ID

Meta data (dates, tags)

Sub Resources

Access Control list

Torrent

S3 - IA - Infrequent Access - Lover cost than s3 - But give data very quickly when it need

RRS - Reduced Redundancy Storage (S3 availability 11 - 9s. RRS - 4 - 9s)

Glacier - Archiver. Take 5-6 hours to retrieve

Charges for

Storage

Requests

Storage Management (For tags)

Data Transfer - (In replication for different regions)

Transfer Acceleration (Upload files via Cloud front edge locations instead of normal internet)

Versioning

if versioning turned on cannot remove it. But Disable the versioning

Capacity calculate for sum of all versions

If delete the version it CANNOT recover. But if we delete the Object it can recover via old console (select delete marker and delete it)

Cross region replication

Both buckets must versioning enabled. Existing files will not replicating. If object delete it replicated. But if restored by deleting delete marker that wont replicate. Same way deleting individual versions will replicate.

Life-cycle Management

S3 -> IA -> Glacier

CloudeFront

EdgeLocation - A location where content will be cached.

Supports for S3, EC2, ELB & Route53

Also can write (put files) on Edge location. Then they will move to origin.

Cached objects will remove after TTL (Time to live) usually 24 days.

Can forcibly clear the cache. But it costs