[zeromq-dev] Exact matching on subscription topics

Andrew Hume andrew at research.att.com
Thu Jan 19 03:54:17 CET 2012

bizarre! but if we're at this level, then we're doomed...

On Jan 18, 2012, at 7:47 PM, Stephen Lord wrote:

>> Yes. Agreed. Complex filtering, even SQL-like filters offered by some 
>> enterprise middleware implementations, is probably out-of-scope for 0MQ.
>> However, few simple filtering algorithms (exact, prefix, regexp?) that 
>> can be performed at wire speed may be in scope.
>> The question here is how to implement the latter.
>> The important point is that the filtering algorithm should be 
>> distributed to every node in the message distribution tree. Thus, 
>> supplying a callback function at the subscriber won't do.
>> I suggest reading the past posts in this thread. There's a disucssion of 
>> the algorithm that would allow for new filtering algorithms that 
>> wouldn't break the old intermediate nodes not aware of the new algorithm.
>> Martin
> I just saw this topic pop up in my email, while in another window I was
> reading something on compression algorithms, and discussion of fast
> prefix matching....
> Perhaps this is a component of what you are looking for:
> http://fastcompression.blogspot.com/2011/12/fast-sequence-comparison.html
> Steve
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Andrew Hume  (best -> Telework) +1 623-551-2845
andrew at research.att.com  (Work) +1 973-236-2014
AT&T Labs - Research; member of USENIX and LOPSA

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