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cubecos
Version: 2.4

How to enable flash cache for storage pool

Connect to console​

    $ ssh [email protected]
    Warning: Permanently added '192.168.1.x' (ECDSA) to the list of known hosts.
    Password:

Check the storage cache status​

    Welcome to the Cube Appliance
    Enter "help" for a list of available commands
    controller> storage
    controller:storage> cache
    controller:cache> status
    STATUS: off

Enable cache​

    controller:cache> switch
    Current cache status: off
    Turn on/off the cache(on/off): on

Check the result​

    controller:cache> status
    STATUS: on
    USED SIZE
    --
    0.34 223GiB
    --

[Optional] Promote/Demote to change the disk tier​

controller:storage> promote_disk
  index          name      size   storage ids
--
      1      /dev/sdb    238.5G           0 1
      2      /dev/sdc    931.5G           2 3
--
Enter the index to promote: 1
controller:storage> demote_disk
  index          name      size     osd              serial
--
      1      /dev/sda    745.2G     0 1  BTWA632602ZU800HGN
      2      /dev/sdb    745.2G     2 3  BTWA632601U9800HGN
      3      /dev/sdc    745.2G     4 5  BTWA632602Q0800HGN
      4      /dev/sdd    745.2G     6 7  BTWA632605GP800HGN
      5      /dev/sde    745.2G     8 9  BTWA63260373800HGN
      6      /dev/sdf    745.2G   10 11  BTWA632601ZJ800HGN
      7      /dev/sdg    745.2G   12 13  BTWA6326047A800HGN
      8      /dev/sdh    745.2G   14 15  BTWA632604RJ800HGN
      9      /dev/sdi    745.2G   16 17  BTWA632602Q3800HGN
     10      /dev/sdj    745.2G   18 19  BTWA632605EV800HGN
     11      /dev/sdk    745.2G   20 21  BTWA632601X9800HGN
     12      /dev/sdm    745.2G   22 23  BTWA6326038Z800HGN
     13      /dev/sdn    745.2G   24 25  BTWA632601RW800HGN
     14      /dev/sdo    745.2G   26 27  BTWA63250476800HGN
--
Enter the index to demote: 1