How do I configure the number of optimizers to run concurrently?

By default, NXPowerLite for File Servers will run two optimizers in parallel meaning it is capable of compressing two files at the same time.  However, you may wish to increase this setting to speed up the compression cycle or decrease it to reduce system resources being used. This article shows you how you can do this, both for evaluation and optimization runs.

System Requirements

This requires version 7.1.4 or later. If you have an earlier version please download an appropriate version.

Changing the number of concurrent optimizers

  1. Close the dashboard, and from the services console (services.msc) stop the NXPowerLite File Server service.
  2. Open the registry editor, and navigate to the appropriate key:
    • HKEY_LOCAL_MACHINE\Software\Neuxpower\NXPowerLite Fileserver\8.0 (on 32-bit systems)
    • HKEY_LOCAL_MACHINE\Software\Wow6432Node\Neuxpower\NXPowerLite Fileserver\8.0 (on 64-bit systems)
  3. Create or edit a DWORD key called "Max optimizer threads", with a value set to the number of optimizers that you wish to run concurrently.

Now launch the NXPowerLite for File Servers dashboard and resume and restart the run*. The service must be restarted and the run restarted before the number of optimizers is set. 

Viewing the concurrently-running optimizers

Each optimizer thread launches a separate instance of the process 'Optimizer.exe', which you can view from your preferred process monitoring tool (e.g. Task Manager).

Optimizer.exe is only run while it is actually optimizing an individual file or zip file, and exits once that file is complete. At times, therefore, you will see your configured number of Optimizer.exe instances running, at other times there might be fewer running.

Choosing how many optimizers to run concurrently

As stated, by default NXPowerLite for File Servers now runs with 2 concurrent optimizers and on many systems that will be most effective setting.

NXPowerLite can generate heavy CPU and disk I/O traffic. If you do increase the number of concurrent optimizer processes, we recommend monitoring your CPU and disk I/O to ensure that this is not becoming a bottleneck affecting the performance of the system as a whole. In our testing, we have found that you can increase the number of concurrent optimizer processes to 4, before other constraints impact on the performance.

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