What can I use the additional InfiniBand network for?

The InfiniBand network can be used for high-performance applications that require low latency and high-throughput communication between compute instances. A common example is parallel applications that use Message Passing Interface (MPI).

Cloud Services

Related questions and answers

  • The InfiniBand network can be used for high-performance applications that require low latency and high-throughput communication between compute instances. A common example is parallel applications that use Message Passing Interface (MPI).

  • Although both A7 and A8 instances have eight virtual cores and 56 GB of RAM, A8 instances also offer the advantage of an additional 32 Gbit/s InfiniBand network that includes remote direct memory access (RDMA) technology for maximum efficiency of parallel MPI applications.

  • Cloud services are billed based on the length of time your service was deployed for. If your instance was deployed for less than an hour, or multiple hours plus some fraction of hour, you will be charged for that duration only. Azure does not round up the partial hour to full hour for billing – you pay for exactly the duration of time that your cloud services instance was in “running” state.

  • Maybe. If the status says “Stopped (Deallocated)”, you aren’t being billed. If it says “Stopped Allocated”, you’re still being billed for allocated cores. StateBilledDetails| | |Starting|Yes|The initial starting state of cloud services as they are going through the boot cycle. This period is billed as the cloud services are running.| |Running (Started)|Yes|The running state of the cloud services.| |Stopped|Yes|A “Stopped” cloud service only stops the role host processes running in the VMs, but the VMs will still be running and you will be billed for allocated cores. Note: To put a cloud service in a “Stopped” state, use the “Stop” option from the Microsoft Azure portal.| |Deleted (Deallocated)|No|Cores are no longer allocated to the cloud services and are no longer billed. Note: The only way to stop all VMs in a cloud service is to delete both the staging and production deployments.|

  • No, the prices listed are tax exclusive, therefore tax will be added separately.

  • No. The InfiniBand network in A8 and A9 instances is only used to connect compute instances within the same Cloud Services deployment, so that compute-intensive applications running on these instances can communicate with the highest efficiency.