Starting the Smart Prefetch Engine

Prerequisite: The file system format of the bcache drive is ext4. Other file system formats are not supported.

Run the lsblk -fs command to check whether the file system format of the bcache drive is ext4.

1. Start the acache_client service.

   sudo systemctl start acache_client

2. Check whether the acache_client has been started successfully.

   sudo systemctl status acache_client

   

   If the command output contains active (running), the acache_client has been started successfully.

   When the acache_client service is being started, the error stating "Warning: acache_client.service changed on disk. Run 'systemctl daemon-reload' to reload units" may occur, as shown in the following figure.

   

   Perform the following steps to rectify the fault:

   1. Reload the service configuration file.

      systemctl daemon-reload

   2. Start the acache_client service.

      systemctl start acache_client