AWS Storage aka S3 Overview
AWS S3
S3 – Object based storage (Photos,videos e.g)
0- 5TB file size
unlimited storage
Files are stored in buckets – (equivalent to folder)
S3 is universal namespace, i.e names are unique
https://s3-us-west.amazonaws.com/anujtomar
-Key – name of object
-value – data
-version id
-metadata
-subresources –
-
- ACL
- Torrent
- S3 – 99.99 availability, 99.99999999999 % durability, stored redundantlycan sstain 2 site failure
- S3 – IA – Infrequent access 99.9 availabilty, lower fees than s3 but charged retriveal fee
- Reduced redundancy storage – 99.99 durability & 99.99 availability
- Glacier – Very cheap, used for archival takes 3-5 hours to restore from glacier
S3 Charges:
- Storage
- Requests
- Storage Mgt Pricing
- Data transfer pricing
- Transfer acceleation
Read S3 FAQ Before exam:
S3 – versioning
– stores all version even if u delete the same
– once enabled versioning can’t be disabled, only be suspended
integrate with lifecycle rules
S3 – Cross Region Replication:
– versioning should be enabled on both buckets
- old objects before enabling cross replication will not be replicated
- New objects will only be replicated
- if u update old version it will replicate all version
- permissions are replicated
- Regions must be unique
- delete markers are replicated – kind of invisible cloak, objects still there
- deleting individual versions or delete markers will not be replicated – u need to delete those manually
It appears the Cross-Region Replication in Amazon S3 cannot be chained. Therefore, it cannot be used to replicate from Bucket A to Bucket B to Bucket C.
An alternative would be to use the AWS Command-Line Interface (CLI) to synchronise between buckets, eg:
aws s3 sync s3://bucket1 s3://bucket2 aws s3 sync s3://bucket1 s3://bucket3
The sync command only copies new and changed files. Data is transferred directly between the Amazon S3 buckets, even if they are in different regions — no data is downloaded/uploaded to your own computer.
