Understanding Azure Blob storage is often made confusing by the term BLOB itself and the large number of options Microsoft offers. So lets clear your mind with some to-the-point straight talk.
What is Blob Storage?
Blob is just an acronym for BINARY LARGE OBJECT and what they are is just files that are stored inside something (like a folder). You access blob storage typically through a browser URL (like https://<Your-Azure-Account>/blob.core.windows.net/<Container>/<Blob> ) or an application like Veeam backup
How Is Blob Storage Structured?
Your Azure Account can have Many Azure Blob Storage CONTAINERS (just think Folders) and each Blob Container can contain many files.
What Are the Different Types of Azure Blobs & How Much Do The Cost?
These prices are in US dollars and are for the base “Locally Redundant Storage”.
| Access Performance | Storage Minimums | Storage Cost Per GB per Month | Write Cost per 10,000 Operations | Read Cost Per 10,000 Operations | Data Retrieval Cost /GB | Data Write Cost /GB | Cost per 10K List or Creates | Delete Costs | |
| Premium | High | n/a | $.0975 | $.0114 | $.0010 | $.0010 | $.0010 | $.0010 | no chg |
| Hot | Medium | n/a | $.0200 | $.0550 | $.0044 | no chg | no Chg | $.0550 | no chg |
| Cool | Low | 30 Days | $.0150 | $.1000 | $.0100 | $.0100 | $.0025 | $.0550 | no chg |
| Archive | 15 hrs | 180 Days | $.0025 | $.1100 | $5.5000 | $.0220 | no Chg | $.0550 | no chg |
What Are the Different Redundancy Options for Bob Storage?
| Acronym | Name | Details |
| LRS | locally redundant storage | Designed to provide at least 99.999999999 % (11 9’s) durability of objects over a given year by keeping multiple copies of your data in one datacenter. |
| ZDS | zone redundant storage | Designed to provide at least 99.9999999999 % (12 9’s) durability of objects over a given year by keeping multiple copies of your data across multiple datacenters or across regions. |
| GRS | geographically redundant storage | Designed to provide at least 99.99999999999999 % (16 9’s) durability of objects over a given year by keeping multiple copies of the data in one region, and asynchronously replicating to a second region. |
| RGRS | read-access geographically redundant storage | Designed for to provide at least 99.99999999999999 % (16 9’s) durability of objects over a given year and 99.99 % read availability by allowing read access from the second region used for GRS. |
What Are the Three Different Types of Blobs?
- BLOCK BLOBS – typical files (.DOCX, .JPGS, .MP4’s…) – has maximum single file size of 200GB
- PAGE BLOBS – file that have parts updated – think about database files where some tiny record in the middle of the file needs to be updated, like daily backups – A single PAGE BLOB file can be 1TB in size
- APPEND BLOBS – files that need to be added to frequently – think about log files that are constantly being added to
How To Recall Data From an Archived Blob?
To recall data from an archived Blob, you need to convert it to a COOL, HOT or PREMIUM Blob before you can see it. Archive is for truly Archived data.
Want More Blob Storage Straight Talk?
We found this video to be quite helpful.
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