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I also want to look into adjusting some of the ZFS l2arc configuration settings; such as setting metadataonly on some filesystems, and letting it store data on others. Theoretically we could add the l2 arc, and only let the VMWare filesystems store filesystem data on the l2arc. While not the same as being able to specify filesystem priority for IOP's, etc., it could provide similar benefits without having a separate zpool.

Also want to do some testing with setting primarycache=metadata on other filesystems to see how that affects performance on the one that has primarycache=all