Instructs the OS to flush it's internal buffers to
the disk device.
NOTE: due to OS and hardware design, data flushed
cannot be guaranteed to be actually on disk-platters.
Actual durability of data depends on write-caches,
barriers, presence of battery-backup, filesystem and
OS-support.
Instructs the OS to flush it's internal buffers to the disk device.
NOTE: due to OS and hardware design, data flushed cannot be guaranteed to be actually on disk-platters. Actual durability of data depends on write-caches, barriers, presence of battery-backup, filesystem and OS-support.