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SSD Cache on High RAM system

ninjabucket
in General Support

Featured Replies

I'm thinking of putting unRAID on a system I have with 192GB of RAM.  Is a cache drive needed with large amounts of RAM, or will the RAM take care of most of the writes?

  • Quote

    The RAM will take care of most of the writes.

     

    My primary server has 64GB of RAM, and after adjusting the dirty_ratio up to 75, I can write ~40GB files to it at GbE speeds (~112MB/s).

     

    With 3x that much RAM you can probably leave dirty_ratio alone and achieve the same results.

  • Quote

    It seems like an expensive alternative to an SSD cache disk.

     

  • Quote
    • Community Expert

    Caching writes isn't the only reason to have a cache disk.

  • Quote

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    This topic is now archived and is closed to further replies.

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