Azure Classroom Series – 28/Oct/2021

Naming Storage Accounts

• When naming the Azure storage account, we need to ensure
  • The storage account name must be unique across all the storage accounts in Azure.
  • The name must be between 3 to 24 characters & can contain only lowercase letters and numbers

Performance Tiers

• When creating the storage account, we need to choose between Standard & Premium Performance Tiers. This setting cannot be changed later
  • Standard:
    • This tier supports all storage services
      • blobs
      • tables
      • files
      • queues
      • unmanaged Azure Virtual Machine disks
  • Premium:
    • This tier is designed to support workloads with greater demands on I/O and is backed by high-performance SSD disks.
    • It only supports General Purpose Accounts with Disk Blobs & Page Blobs.
    • It also supports Block Blobs or Append Blobs with BlockBlobStorage Account & Files with FileStorage accounts

Redundancy or Replication Options

• When we create a storage account, we can also specify how our data will be replicated for redundancy and resistance to failure.
  • Locally Redundant Storage (LRS):
    • Makes three synchronous copies of our data within a single datacenter
    • Available for both the Standard & Premium Performance Tiers
  • Zone Redundant Storage (ZRS):
    • Makes three synchronous copies of our data to three seperate availability zones within a single region
  • Geographically Redundant Storage (GRS):
    • This is same as LRS (three local copies) plus three additional asynchronous copies to a second datacenter hundreds of miles away from the primary region.
    • Data replication to other Geography typically occurs within 15 minutes (although ther is no SLA provided)
  • Geo Zone Redundant Storage:
    • This is same as ZRS (three synchronous copies across Zones), plus three additional asynchronous copies to second datacenter hunderds of miles away from the primary region.
    • Data replication to other Geography typically occurs within 15 minutes (although ther is no SLA provided)
• Refer Here for the official docs.

Access Tier

• Azure Blob Storage supports three access tiers
  • Hot:
    • This access tier is used for frequently accessed data.
    • Relative to other tiers data access costs are low, while storage costs are higher
  • Cool:
    • This access tier is used to store large amounts of data i.e not accessed frequently & this is stored for atleast 30 days.
    • The availability SLA is lower than Hot tier.
    • Relative to Hot tier access costs are higher & storage costs are lower
  • Archive:
    • This access tier is used to archive data for long term storage i.e. accessed rarely & can tolerate several hours of retrieval latency & will remain in Archive tier for atleast 180 days.
    • This tier is most-cost effective for storing data, but access data is more expensive than Hot or Cool tiers.
  • Evaluate prices using pricing calculator Refer Here