MCS

Cold Starting and/or Hydrating Your Applications To Improve Their Startup Times

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In the End User Computing (EUC) space we know that after the first time the application starts post reboot, the next time is faster. The first startup is referred to as a cold startup and all subsequent runs are warm startups. The first time the application starts, components of the application, such as the EXEs (executables) and DLLs (dynamic link libraries) need to be loaded from disk, which can delay the startup time. All subsequent runs will then read the data from the file system cache, which is memory managed by the Operating System.

Hydrate and Cold Start your applications

The way we prepare a system for a user is to cold start (pre-launch) the applications when the system starts. We do this by starting and then terminating each process, such as winword.exe.

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Best Practice for the Windows Time (W32TIME) Service for RDSH and VDI workloads

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When using image deployment mechanisms for RDSH and VDI workloads, such as Citrix PVS, Citrix MCS and VMware View Composer, it’s extremely important to reconfigure the Windows Time (w32time) Service to ensure that the LastBootUpTime is accurate. If it’s not accurate, it effects monitoring, the correlation of log data, event triggers, etc.

The default Manual trigger of the Windows Time service is based on domain membership, which seems to cause issues as the image boots and changes name to the correct target name. Without having a deep enough understanding on the inner workings of these technologies, I can only assume that the default trigger of the Windows Time service is not compatible with the way the imaging mechanisms work on boot up to change the computer name and join to an Active Directory computer object. There may be a point during startup where Windows detects that it’s not domain joined and therefore stops the Windows Time service, which seems to throw the time out.

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