Azure Classroom Series – 03/Jan/2021

Terms in Disk Performance

• IOPS: Storage type which we select (SSD /HDD) which will decide how fast disks are & this is measured in IOPS (Input/Output Operations per second )
• Througput: This is amount of data that your application is sending the the storage disk in a second
• IOPS vs Throughput:
  • IOPS * I/O Size = throughput.
• latency: Reading and writing takes time. Latency is the time it takes for you app to send a request to the disk and get response
• To reduce this disk latency Disk Caching
• Disk caching:
  • Caching uses specialized & sometimes expensive temporary storage that has faster read & write performace than permanent
  • Read Caching: tries to speed up the data retrieval
  • Write Caching: tries to speed up writing data to persistent storage

Cache Options for Azure VMs

• We have following options
  • Read/Write
  • Read-only
  • None
• Os disk:
  • Read-only, Read/Write (default), None can be set
• Data Disk
  • Read-only (default), Read-write and None can be set
• Temporary disk: disk caching is not supported

Azure File Shares

• Create a windows server and linux system
• We can use Azure file share to create a network file share using SMB Protocol to vms in Azure and also to windows/linux/mac machines on-premise.
• Create a Storage account and naviagate to fileshare blade
• Now login into the windows server created and mount the file share
  • Launch Powershell as administrator
  • Now copy the command and run it in powershell
• Now lets mount this file share on a linux vm
• To enable identity based authentication for Active directory users Refer Here
• If your organization wants to use azure file share using NFS protocol Refer Here