11–20 of 59 posts
I found the nginx native image library completely inadequate a few years ago, so I had to use the perl module to connect it to imagemagick libraries instead. Much higher quality results. Not sure if they have improved the native library but I doubt it has the flexibility. The important part is caching the results because of the expensive cpu time. ps. googling about the current state of this came up with an interesti…
Does the image_filter module use the GPU? Image filtering is an expensive operation for the CPU, with large latencies as well.
You're better off performing it on a CPU, of course SIMD optimized.
Besides, web servers probably won't have GPUs anyways.
Does the image_filter module use the GPU? Image filtering is an expensive operation for the CPU, with large latencies as well.
Actually GPU latencies and transfer costs dominate most simple image filtering operations. A GPU might be fast once the data is in GPU local RAM, but if just transferring the data back and forth takes 3x the time running the filter locally, what's the point? You're better off performing it on a CPU, of course SIMD optimized. Besides, web servers probably won't have GPUs anyways.
And these Intel Xeon's with embedded GPUs don't need to transfer data to the coprocessor, since they operate off of system memory, so transfer latencies are a non-issue.
I was wondering if an additional cookie based security token is possible with secure_link module. (show image only if session cookie is present) Apparently, it is possible, great! One of the google results: https://gist.github.com/hilbix/5921589
I wish the author had gone into more detail about why they chose to stop using Varnish.
I wish the author had gone into more detail about why they chose to stop using Varnish.
I stopped using varnish because, after all, my site is just a blog and Nginx is just fine for my needs. It has a single backend server, so there's no load-balancing. Basically, I was already using Nginx to serve static files, and my caching logic was so simple it was actually easier to move it into Nginx.
I'm genuinely curious because I've never stood up Varnish before so maybe there's an anti-pattern / gotcha to learn from.
This is a cool little project showcasing some of NginX's lesser known modules in action. However, I have one nitpick. The caching server's main location is a bit of a cargo-cult unoptimization. They have specified: location ^/(.+)$ { When the equivalent: location / { Is shorter, clearer, and does not incur a regular expression capture on every request that is never used.
That allows "/" to be used for other purposes, e.g. redirecting to the main page of the site, or displaying a nice error page. (However, in this case it simply shows the default Debian Nginx installation page: http://m.charlesleifer.com/ )
This is a cool little project showcasing some of NginX's lesser known modules in action. However, I have one nitpick. The caching server's main location is a bit of a cargo-cult unoptimization. They have specified: location ^/(.+)$ { When the equivalent: location / { Is shorter, clearer, and does not incur a regular expression capture on every request that is never used.
My ideal web server would have a configuration that resembles a decision procedure in a programming language, so I can have a mental model for what makes it choose one route over the others, and how settings are combined, etc.
Somehow Nginx repeatedly makes me and my coworkers very confused—are we crazy or just mildly incompetent? Should I read an Nginx book?
(One time I wanted to do something fairly straightforward, I think using a conditional inside some block, and when I looked in the manual it warned very strongly that this might cause segmentation faults. I was like WTF?)
secure_link_md5 "my awesome secret $uri";
This is why in the ngx_http_secure_link_module's documentation the secret is appended (instead of prepended), see http://nginx.org/en/docs/http/ngx_http_secure_link_module.ht...:
secure_link_md5 "$secure_link_expires$uri$remote_addr secret";
I wish the author had gone into more detail about why they chose to stop using Varnish.