I've been wondering the same thing and have found many interesting 
technical papers - though some seem overly-complex. I'm not sure what 
head-way the node community has made in this regard though.

Here's an interesting one: 
http://homes.cs.washington.edu/~magda/kwon-vldb08.pdf

Mario

On Friday, 2 August 2013 00:13:48 UTC-4, Gregg Caines wrote:
>
> Hey all,
>
> From my understanding, the stream abstraction doesn't currently concern 
> itself with (big-R) Reliability.  Is that correct?
>
> For example, what if I wanted to send a text file over TCP (maybe with a 
> capitalization transform in between for good measure), where the entire 
> script could resume properly from being interrupted and restarted?
>
> I'd need to maintain the byte offset of the last file-read somewhere of 
> course that could survive the restart, but it seems like the internal 
> 'drain' mechanism can't really guarantee that even if I've successfully 
> read up to that byte, it's been successfully written to TCP.  It could have 
> been in motion through the streams and their buffers (even with 
> highWaterMark = 1) at the time that script was stopped.  
>
> I could imagine an implementation where no stream can emit a 'drain' event 
> until all of its down-streams have emitted 'drain' events, but otherwise it 
> seems that the in-memory buffers sort of make that impossible.  
>
> I'm just asking because I'm trying to determine if streams are the right 
> abstraction for some reliable messaging work that I'm doing.  It would be 
> nice if the answer was yes, but it seems like no.  
>
> Can anyone throw me a clue?
>
> Thanks,
>
> G
>

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