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...
"""
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