How do I enable aio on nginx on FreeBSD?

Question

I want to use asynchronous IO on nginx on FreeBSD. I see lots of documentation on how to configure it or how to compile nginx with it.

However, I already have nginx installed so I need to re-compile nginx with aio enabled. The recompile part is what I don't know how to do.

I'm using the nginx (v0.7.67) port provided with FreeBSD 8.

Can anybody help me?

Answer 1

First, you need to add AIO support to your FreeBSD. You can use two ways for do this. 1) Add "options VFS_AIO" and rebuild kernel. 2) Loaded AIO dynamically via loadable kernel module: kldload aio

Add this lines to config after that:

location /video/ {
    sendfile       off;
    aio            on;
    output_buffers 1 64k;
}

You can use sendfile for AIO:

location /video/ {
    sendfile       on;
    tcp_nopush     on;
    aio            sendfile;
}

Both variants will work.

Answer 2

The easiest way to enable nginx file aio support on FreeBSD is to install nginx via the ports tree and just select the FILE_AIO option in the dialog.

portsnap fetch extract
cd /usr/ports/www/nginx
make install clean

But if you want to compile it yourself, download the source, extract it and then:

./configure --with-file-aio
make install

(You need to run both portsnap and make install as root!)