This is achieved by using the dockerd –g command. For host systems where the system drive exists on spinning disk magnetic media (HDDs) but faster storage media is available (faster HDDs or SSDs), it is possible to move the container scratch space to a different drive. This serves as the container's system drive, and as such many of the writes and reads done in container operation follow this path. Scratch Space LocationĬontainers, by default, use a temporary scratch space on the container host's system drive media for storage during the lifetime of the running container. Subsequent container starts from the image will not incur the first logon cost. However, this cost can be removed from Nano Server based images by committing at least one layer to the container image. This is not the case with Nano Server base image. The base image that ships for Server Core has been optimized by removing the start-up time overhead associated with first logon (OOBE).
Microsoft ships a base image for both Nano Server and Server Core. Below are some tuning trade-offs to understand to achieve improved start-up time.
#SHEEPSHAVER IMPROVE PERFORMANCE WINDOWS HOW TO#
As such, understanding how to best optimize for container start-up time is critical. Container Start-Up TimeĬontainer start-up time is a key metric in many of the scenarios that containers offer the greatest benefit. When it does restart, it restarts much faster.
#SHEEPSHAVER IMPROVE PERFORMANCE WINDOWS WINDOWS#
It takes up far less disk space, sets up significantly faster, and requires far fewer updates and restarts than Windows Server. It is similar to Windows Server in Server Core mode, but significantly smaller, has no local logon capability, and only supports 64-bit applications, tools, and agents. Nano Server is a remotely administered server operating system optimized for private clouds and datacenters. Windows Server Containers and Hyper-V Containers offer support for Server Core and for a new installation option available in Windows Server 2022: Nano Server. In addition, there is the expected further overhead in some network, storage IO, and CPU paths. This affects container density as, unlike Windows Server Containers, less sharing of system files and binaries can occur, resulting in an overall larger storage and memory footprint. The extra isolation provided by Hyper-V containers is achieved in large part by a hypervisor layer of isolation between the container and the container host. In this configuration, the kernel of the container host is not shared with the Hyper-V Containers. Hyper-V Containers expand on the isolation provided by Windows Server Containers by running each container in a highly optimized virtual machine. A Windows Server container shares a kernel with the container host and all containers running on the host. Windows Server Containers provide application isolation through process and namespace isolation technology. Windows Server Container and Hyper-V containers offer many of the same portability and consistency benefits but differ in terms of their isolation guarantees and performance characteristics. Windows Server Container and Hyper-V Containers In addition, we detail performance impacting configurations, and describe the tradeoffs with each of those options. These configurations have different performance implications, which we detail below to help you understand which is right for your scenarios. Each container type supports either the Server Core or Nano Server SKU of Windows Server 2022. Starting with Windows Server 2022, two types of containers are available: Windows Server Containers and Hyper-V Containers.