Disk Cache Configuration

If you're running an IO-intensive app like Primavera, go with writeback mode.

• none: Strikes the ideal balance between raw performance and data safety—it works without the host cache, so it's the go-to for production and live migration scenarios.
• writeback: Delivers top speed by buffering writes in the host's RAM, but watch out—if the host crashes before data hits the disk, you could lose a lot.
• writethrough: Guarantees rock-solid data integrity because every write is confirmed only after it's safely on physical storage, but the trade-off is painfully slow write performance.

A system reboot is necessary after altering this configuration.