Tuning Storage Scale configuration settings to optimize performance

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How to change IBM Storage Scale configuration settings to optimize performance when used with IBM Storage Archive Enterprise Edition.

Settings for the following Storage Scale configuration parameters can affect the performance of the IBM Storage Archive Enterprise Edition:

      maxFilesToCache
      pagepool
      worker1Threads
      worker3Threads
      tokenMemLimit
      dmapiWorkerThreads

The ltfsee_config command, by default, changes the settings for these parameters to the following values:

 
      workerThreads 512 (for Storage Scale 4.2.1)
      dmapiWorkerThreads 64

A best practice is to keep the total value of the pagepool, maxFileToCache and maxStatCache settings to 50% or less of the available system memory.

A setting that is too large or too small for your system can impact IBM Storage Archive Enterprise Edition performance. For example, if the system memory available for the IBM Storage Archive Enterprise Edition is not large enough for a 28 GB (26.08 GiB) page pool (pagepool 28G setting) and 15 GB (13.97 GiB) of caching tokens (tokenMemLimit 15G setting), it can cause unexpected Linux® memory swapping that significantly degrades system performance. In such a case, tune the values for these settings by reducing them to fit the available memory space.

For more information about Storage Scale configuration parameters, see the mmchconfig command in your Storage Scale documentation.