Setting the SSD Configuration

To allow future storage expansion, you will need to set the Maximum Device Count to the total number of drive slots physically available in the Lightbits node during the initial Lightbits configuration process.

Setting the Maximum Device Count to the maximum number of drive slots allows you to start the Lightbits node with empty drive slots in the server chassis. This is because you only need a small amount of storage and plan to add more SSDs into the empty drive slots as demand increases.

For example, your storage server chassis has 12 SSD slots, but initially, you only want to configure Lightbits to use eight drives. So in this case, you need to:

• Set your Maximum Device Count to 12.
• Physically install only eight drives.
• Leave four drive slots empty for later use.

To specify the SSD configuration for a node, you must enter a value for the total drive slots available for your Lightbits node to the host configuration file as follows:

name: server00

data_ifaces:

-   bootproto: static

    conn_name: ens1

    ifname: ens1

    ip4: 10.10.10.100/24

nodes:

-   instanceID: 0

    data_ip: 10.10.10.100

    failure_domains:

    - server00

    ec_enabled: true

    data_ip: 10.10.10.100

    lightfieldMode: SW_LF

    storageDeviceLayout:

      initialDeviceCount: 6

      maxDeviceCount: 12

      allowCrossNumaDevices: false

      deviceMatchers:

#      - model =~ ".*"

        - partition == false

        - size >= gib(300)