Enabling Tiering

On all new installations, the data tiering functionality is enabled and available for all new volumes. If you are upgrading, you must enable data tiering; see Step 5: Enable New Features for more information. If the data tiering functionality is enabled, you can then selectively enable tiering for a volume at the time of volume creation using the MapR Control system and the CLI. Data tiering is only available for new volumes; you cannot enable data tiering for existing volumes. Enable tiering for new volumes where read/write latency is not the dominant concern. You can decide later whether you want to do local (or warm) or remote (or cold) tiering. Data tiering cannot be disabled after it is enabled for a volume.

Enabling Tiering Using the MapR Control System

  1. Move the Data Tier slider to Yes (to enable tiering) in the Create New Volume page in MCS.
    Proceed to the next step only if you wish to select a tier type for the volume. You can create a tiering-enabled volume without selecting a tier type and select a tier type later by editing the volume.
    Note: You cannot disable tiering for a volume after it is enabled.
  2. (Optional) Select Erasure Coding (for warm tiering) or Remote Archiving (for cold tiering) from the Tiering Type drop-down menu.
    You:
    • Can enable a volume for either warm or cold tiering, but not for both.
    • Cannot modify the tier type after the volume is created.
  3. Specify all other required and optional properties for creating the volume and click Create Volume.
    For information on required and optional properties, see Creating a Volume.

Enabling Tiering Using the CLI

Run the following command to enable tiering:
maprcli volume create -name <vol-name> -path <mount-path> -tieringenable true
For more information, see volume create.