Hey thanks so much for your response!<br><br><div>I'll look into that upstream facility. Looks like thats is exactly what I need.</div><div><br></div><div>Thanks again!</div><div>Christopher</div><div><br><div class="gmail_quote">
On Mon, Jul 12, 2010 at 10:25 PM, agentzh <span dir="ltr"><<a href="mailto:agentzh@gmail.com">agentzh@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div class="im">On Tue, Jul 13, 2010 at 5:22 AM, Christopher Triolo<br>
<<a href="mailto:christopher.triolo@gmail.com">christopher.triolo@gmail.com</a>> wrote:<br>
> I'm in the process of creating a nginx module that serves files from a file<br>
> system within mongoDB.<br>
> Code is here: <a href="http://github.com/mdirolf/nginx-gridfs" target="_blank">http://github.com/mdirolf/nginx-gridfs</a><br>
> Basically we embed our C-driver into the module and talk to mongoDB that<br>
> way.<br>
<br>
</div>By looking at the source code, it seems to me that it blocks on I/O. Sigh.<br>
<div class="im"><br>
> When the handler is called, it retrieves a file chunk by chunk from mongoDB<br>
> and serves it.<br>
<br>
</div>Is it possible to make it non-blocking? Like those using the<br>
ngx_http_upstream facility?<br>
<div class="im"><br>
> I would be very grateful if someone would be able to clear up a few things<br>
> for me, as I still haven't fully wrapped my head around nginx's internals...<br>
> Do I save anything by calling ngx_http_output_filter() for each chunk of<br>
> data.<br>
<br>
</div>Actually, it usually makes things slower if the chunk is too small<br>
(more invocations of the output filter chain and more writev<br>
syscalls). We observed a significant performance difference in our<br>
mysql driver module ngx_drizzle ;)<br>
<div class="im"><br>
> If the call to mongoDB blocks the worker process, would it be just the same<br>
> to call ngx_http_output_filter() once for the whole file?<br>
<br>
</div>Not really :)<br>
<br>
Cheers,<br>
<font color="#888888">-agentzh<br>
</font><div><div></div><div class="h5"><br>
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