Disk Cache Configuration

For I/O-intensive applications like Primavera, use the writeback setting.

• none – offers the best balance of native performance and data safety by skipping the host cache, so it’s the usual pick for production and live migration.
• writeback – gives top-notch performance by using the host’s RAM as a buffer, but if the host crashes before syncing to disk, you risk losing a lot of data.
• writethrough – ensures rock-solid data integrity by only confirming writes after they reach the physical storage, though write speeds suffer badly.

After you change this setting, a reboot is needed.