Re: ZODB and asyncio interaction

On Thu, Apr 21, 2016 at 10:03 PM, Jesus Cea <[email protected]> wrote:
> Hi there. I kind of remember a discussion some time ago about the
> strategy to mix ZODB and asyncio, with references to some other work,
> but I don't remember the details and I can't find the thread.
>
> Thinking of my own, I can't devise how to be able to suspend an
> attribute access to fetch the data and, at the same time, allow other
> asyncio activity to progress in the same thread.
>
> What am I missing or I misunderstood the thread and it can't just be
> done? :-)

I don't think the ZODB model fits with asynchronous development.

I'm a huge fan of asynchronous development for I/O or when dealing
with external services.  I'm not a fan of asynchronous development
as a general development model.  I get why some people embrace it;
in a browser, you often have to wait for a server without blocking a UI,
and browser developers are bringing their habits to the server, where it
might not make much sense.

One might argue that ZODB applications sometimes block waiting for
a storage server, but I would argue that if this is significant, then perhaps
the application isn't tuned well, and that this can be mitigated with a modest
thread pool, in addition to tuning, if possible.

BTW, I've been thinking off an on about how someone might leverage ZODB
in a browser.  A model I've been thinking about is one where ZODB could be
used in web-workers that are exposed as services with asynchronous interfaces,
but work imperatively internally.

Jim

-- 
Jim Fulton
http://jimfulton.info

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