From: Monty Taylor
Date: March 22 2007 5:53pm
Subject: Re: Integrating NDB async transactions with other event loops
List-Archive: http://lists.mysql.com/ndb-connectors/20
Message-Id: <1174586017.29239.1.camel@qualinost>
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On Mon, 2007-03-19 at 12:14 +0200, Mika Raento wrote:

> I'm looking to use the NDB connectors from Python and Perl based 
> async-io frameworks (specifically, Twisted and Danga::Socket) and have 
> been digging a bit into how this would be done as efficiently as possible.
> 
> First of all: has anybody already done something that integrates NDB 
> into an existing event loop? I'd love to hear your experiences. Second 
> question: is there any real documentation on how (or whether) the NDB 
> API uses threads internally?


Got a good reply on this from Jonas: 

"""
Using ndb async transactions and select/(e)poll does not currently work.
We dont provide a fd to use.
And communication between ndbapi/ndbd is multi socket and multiple
threads also
  multiplex over same socket(s).

Adding to this, transport mechanism is configurable (tcp,shm,sci etc)
and is
  transparent to ndbapi programs, as well as *with-in* ndbapi.

Conclusion: Using ndb async transaction is select/(e)poll loop
  is not possible wo/ adding that support explicitly to ndbapi...

  which btw is a cool idea...
"""
-- 
Monty Taylor, Senior Consultant
MySQL Inc., Seattle, USA, www.mysql.com
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