Azure Storage Performance Tiers
- In Azure there are two performance tiers
- Standard:
- This tier supports all storage services
- blobs
- tables
- files
- queues
- This tier supports all storage services
- Premium:
- This tier is designed to support workloads with greater demands of I/O and is backed by high performance SSD disks.
- This tier supports the following storage services
- Page blob
- Block Blob
- files (File Share)
- Standard:
Azure Storage Replication Options (Redundancy)
- When we create a Storage Account, we can specify how the data will be replicated for redundancy and resistance to failure. The options are
| Account Type | Description |
|---|---|
| Locally Redundant Storage (LRS) | Make three synchronous copies of our data with in single region |
| Zone Redundant Storage (ZRS) | Makes three synchronous copies of our data across multiple AZ in the region |
| Geographically Redundant Storage (GRS) | Same as LRS, plus three additional copies asynchronously to different region |
| Read-access GRS | Same capabilities as GRS, plus you have read-only access to the data in the other region |
Access Tiers
- Azure blob storage supports three access tiers
- Hot: Optimized for frequently access of objects in storage account. Relative to other tiers data access costs are low while storage costs are higher
- Cool: Optimized for in-frequently accessed and stored data. Relative to Hot Tier, data access costs are higher and storage costs are lower
- Archive: Optimized for long-term archiving of infrequently access data that can tolerate several hours of retrieval latency.
| parameters | Hot tier | Cool tier | Archive Tier |
|---|---|---|---|
| Availability SLA | 99.9% (99.99% RA-GRS) | 99% (99.99% RA-GRS) | N/A |
| Costs | Higher storage costs and lower access costs | Lower storage and higher access costs | Lowest storage cost and highest access cost |
| Latency | milliseconds | milliseconds | Up to 15 hours |
| Minimum Storage Duration | N/A | 30 days | 180 days |
Exercises:
- Create a Storage account with Standard performance tier and Zone Redundant Storage in central us region
- Create a Storage account with Standard performance tier and LRS and select the Cool Access tier
