Storage services Flashcards
What are Storage accounts?
Cloud solution for storing data, accounts with accesses to different types of storage services.
What are the 4 main types of Storage services Azure offers?
Blobs (Binary Large Objects) also called containers - basic, inexpensive way to store data
File Shares
Queues
Tables
What are the 3 Access tiers?
Hot, Cool, Archive
What are the different Redundancy options in a Storage account?
LRS, GRS, ZRS, GZRS
Locally- , Geo- , Zone- and Geo-zone-redundancy
What are the features of LRS?
Locally-redundant storage
Three copies within a single data center
Lowest cost & least durability
Protects data against server rack and drive failures
Disaster in the data center: Data may be lost
What are the features of ZRS?
Zone-redundant storage
Three replications across three Availability Zones
Separate physical location
Protects data against disaster in a data center
What are the features of GRS?
Geo-redundant storage
Three copies using LRS in one region
Three copies using LRS in secondary region
Paired region based on region pairs
Read-access per default only after failure (RA-)GRS
Protects from regional disaster
What are the features of GZRS?
Geo-zone-redundant storage
Three replications across three Availability Zones (ZRS)
Three copies using LRS in secondary region
Maximum durability, availability and consistency
Read-access per default only after failure (RA-)GZRS
What is Blob?
Binary Large Object
Storing massive amount of unstructured data of any type. Organized to Containers (folders, that are not hierarchical (cannot be nested).
Describe Hot Access tier and give an example.
More expensive storage cost
Cheaper read/write operations
Low latency
Good for frequently accessed data
Example: Images on a website
Describe Cool Access tier and give an example.
Cheaper storage cost than “Hot”
More expensive read/write operations
Good for infrequently accessed data
Higher latency
Good for infrequently accessed data
Example: Short-term backup
Older datasets
Describe Archive Access tier and give an example.
Cheapest storage
Most expensive access cost
Cannot be read directly (offline tier)
Must be rehydrated to cool or hot before it can be accessed
Example: Long-term backup, Data Archiving
What is Queue storage?
Storing large number of messages in a queue, because they cant be processed right away but one by one.
What are Azure files and how can they be accessed?
Managed files shared in the cloud that serve as a replacement of physical file servers.
They can be accessed via SMB - Server Message Block protocol or NFS - Network File System protocol
What is File Sync? What are the typical use cases?
Syncing data from on-premise file servers to Azure.
Used to sync data between sites / offices or in case of disaster recovery.
