Is using blockdevices for caching supported in Red Hat Enterprise Linux (RHEL)?

Solution Verified - Updated -

Issue

  • Is it possible to use blockdevices (i.e. backed by a SSD drive) as transparent cache layer to access disks?
  • Is there a function to use SSD for caching?
  • Can SSD be used as an additional caching layer between (slow) harddisks and (fast) ram?
  • Does RHEL support any of the following storage caching technologies?
    • dm-cache or lvmcache
    • bcache
    • FlashCache
    • EnhancedIO
    • RapidCache

Environment

  • Red Hat Enterprise Linux (RHEL) 6, 7, 8

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