Storage optimized virtual machine sizes

Storage optimized VM sizes offer high disk throughput and IO, and are ideal for Big Data, SQL, and NoSQL databases. This article provides information about the number of vCPUs, data disks and NICs as well as storage throughput and network bandwidth for each size in this grouping.

The Ls-series offers up to 32 vCPUs, using the Intel® Xeon® processor E5 v3 family. The Ls-series gets the same CPU performance as the G/GS-Series and comes with 8 GiB of memory per vCPU. Ls-series VMs are ideal for applications requiring low latency, high throughput, and large local disk storage.

Example use cases include NoSQL databases such as Cassandra, MongoDB, Cloudera, and Redis, data warehousing, and large transactional databases.


The Ls-series is optimized for use of the temporary disk attached to the VM machine rather than use of durable data disks. The high throughput and IOPS of the temporary disk makes the Ls-series ideal for NoSQL stores such as Apache Cassandra and MongoDB which replicate data across multiple VMs to achieve persistence in the event of the failure of a single VM. The Ls-series does not support the creation of a local cache to increase the IOPS achievable by durable data disks.


ACU: 180-240

Premium Storage: Supported

Premium Storage Caching: Not Supported

Size vCPU Memory: GiB Temp storage (SSD) GiB Max data disks Max temp storage throughput: IOPS / MBps Max uncached disk throughput: IOPS / MBps Max NICs / Expected network bandwidth (Mbps)
Standard_L4s 4 32 678 16 20,000 / 200 5,000 / 125 2 / 4,000
Standard_L8s 8 64 1,388 32 40,000 / 400 10,000 / 250 4 / 8,000
Standard_L16s 16 128 2,807 64 80,000 / 800 20,000 / 500 8 / 16,000
Standard_L32s 1 32 256 5,630 64 160,000 / 1,600 40,000 / 1,000 8 / 20,000

The maximum disk throughput possible with Ls-series VMs may be limited by the number, size, and striping of any attached disks. For details, see Premium Storage: High-performance storage for Azure virtual machine workloads.

1 Instance is isolated to hardware dedicated to a single customer.

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.
  • If you want to get the best performance for your VMs, you should limit the number of data disks to 2 disks per vCPU.
  • Expected network bandwidth is the maximum aggregated bandwidth allocated per VM type across all NICs, for all destinations. Upper limits are not guaranteed, but are intended to provide guidance for selecting the right VM type for the intended application. Actual network performance will depend on a variety of factors including network congestion, application loads, and network settings. For information on optimizing network throughput, see Optimizing network throughput for Windows and Linux. To achieve the expected network performance on Linux or Windows, it may be necessary to select a specific version or optimize your VM. For more information, see How to reliably test for virtual machine throughput.

Other sizes

Next steps

Learn more about how Azure compute units (ACU) can help you compare compute performance across Azure SKUs.