The A8-A11 and H-series sizes are also known as compute-intensive instances. The hardware that runs these sizes is designed and optimized for compute-intensive and network-intensive applications, including high-performance computing (HPC) cluster applications, modeling, and simulations. The A8-A11 series uses Intel Xeon E5-2670 @ 2.6 GHZ and the H-series uses Intel Xeon E5-2667 v3 @ 3.2 GHz.
Azure H-series virtual machines are the next generation high performance computing VMs aimed at high end computational needs, like molecular modeling, and computational fluid dynamics. These 8 and 16 core VMs are built on the Intel Haswell E5-2667 V3 processor technology featuring DDR4 memory and local SSD based storage.
In addition to the substantial CPU power, the H-series offers diverse options for low latency RDMA networking using FDR InfiniBand and several memory configurations to support memory intensive computational requirements.
|Size||CPU cores||Memory: GiB||Local SSD: GiB||Max data disks||Max disk throughput: IOPS||Max NICs / Network bandwidth|
|Standard_H8||8||56||1000||16||16 x 500||2 / high|
|Standard_H16||16||112||2000||32||32 x 500||4 / very high|
|Standard_H8m||8||112||1000||16||16 x 500||2 / high|
|Standard_H16m||16||224||2000||32||32 x 500||4 / very high|
|Standard_H16r*||16||112||2000||32||32 x 500||4 / very high|
|Standard_H16mr*||16||224||2000||32||32 x 500||4 / very high|
A-series - compute-intensive instances
|Size||CPU cores||Memory: GiB||Local HDD: GiB||Max data disks||Max data disk throughput: IOPS||Max NICs / Network bandwidth|
|Standard_A8*||8||56||382||16||16x500||2 / high|
|Standard_A9*||16||112||382||16||16x500||4 / very high|
|Standard_A10||8||56||382||16||16x500||2 / high|
|Standard_A11||16||112||382||16||16x500||4 / very high|
Size table definitions
- Storage capacity is shown in units of GiB or 1024^3 bytes. When comparing disks measured in GB (1000^3 bytes) to disks measured in GiB (1024^3) remember that capacity numbers given in GiB may appear smaller. For example, 1023 GiB = 1098.4 GB
- Disk throughput is measured in input/output operations per second (IOPS) and MBps where MBps = 10^6 bytes/sec.
- Data disks can operate in cached or uncached modes. For cached data disk operation, the host cache mode is set to ReadOnly or ReadWrite. For uncached data disk operation, the host cache mode is set to None.
- Maximum network bandwidth is the maximum aggregated bandwidth allocated and assigned per VM type. The maximum bandwidth provides guidance for selecting the right VM type to ensure adequate network capacity is available. When moving between Low, Moderate, High and Very High, the throughput will increase accordingly. Actual network performance will depend on many factors including network and application loads, and application network settings.
For information and considerations about using these sizes, see About the H-series and compute-intensive A-series VMs.
Learn more about how Azure compute units (ACU) can help you compare compute performance across Azure SKUs.