> Asynchronous I/O can be implemented with two threads:
> - I/O thread     - waits for I/O requests
> 
> - working thread - sends I/O request (returns immediately)
> 
> - I/O thread     - sends I/O request to kernel, kernel to DMA, then wait 
> for completion (no CPU involved here - basically it waits on the 
> read/write functions)
> 
If I am not mistaken (and I probably am) this is the functionality the
the selector will give you in java NIO.

-- Chris


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