sync: /sink/ n., vi. (var. `synch') 1. To synchronize, to bring
into synchronization. 2. [techspeak] To force all pending I/O to
the disk; see flush, sense 2. 3. More generally, to force a
number of competing processes or agents to a state that would be
`safe' if the system were to crash; thus, to checkpoint (in the
database-theory sense).
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