4 ms·

PHP is usually deployed in a FastCGI multiprocess setup, so the server will keep handling requests on the other processes while the hashing process is blocked.

by Joeri 11y ago

PHP is usually deployed in a FastCGI multiprocess setup, so the server will keep handling requests on the other processes while the hashing process is blocked. I wonder whether threading really saves you, given that there are only so many cores in a system and password hashing is CPU heavy. Naively it seems a DoS would involve sending as many parallel requests as there are cores, which is not a lot and can easily be done from a single machine.

sarciszewski 11y ago
The blog post that HN is reading is served by PHP-FPM + nginx, without any extra special features to handle the load of an unexpected "oh hey we made it to the front page of HN". It's also hosted on a relatively cheap VPS.
- seanp2k2 11y ago
  Considering the other article from HN today about Stack Overflow being able to handle their top-100 global Alexa rank traffic with one physical web front end, I'm impressed but not that impressed. PHP has been popular for a long time and lots of smart people have figured out how to make it pretty quick. For things like blog posts, I'm sad that Movable Type fell out of favor. The pattern of using dynamic server pages to edit blog posts and generate static files for your viewers just makes so much sense to me. Then again, these days we can host our single-page JS front-ends on S3 + CloudFront and hook them up to API gateway and Lambda / Beanstalk talking to RDS and "not have any servers" :)
herbst 11y ago
I know thats what i ment with usually you give a fuck, i dont know any way you could run PHP single threaded on a server (i mean there sure is). But its something common you learn when you programm in the other languages i mentioned. I dont think it could get a real issue in a real environment, except someone really wants to fuck with you. But the some fail2ban on to fast requests should fix this easily as the hashes dont actually take that long.
- girvo 11y ago
  > i dont know any way you could run PHP single threaded on a server Using `php -S 0.0.0.0:80 index.php` would do it!
seanp2k2 11y ago
Even with mod_php you get 1 per fork with the prefork mpm, so this wouldn't even stop some Apache 2.2 box with php4 configured 10 years ago from accepting new connections.

by Joeri 11y ago

sarciszewski 11y ago

The blog post that HN is reading is served by PHP-FPM + nginx, without any extra special features to handle the load of an unexpected "oh hey we made it to the front page of HN". It's also hosted on a relatively cheap VPS.

seanp2k2 11y ago
Considering the other article from HN today about Stack Overflow being able to handle their top-100 global Alexa rank traffic with one physical web front end, I'm impressed but not that impressed. PHP has been popular for a long time and lots of smart people have figured out how to make it pretty quick. For things like blog posts, I'm sad that Movable Type fell out of favor. The pattern of using dynamic server pages to edit blog posts and generate static files for your viewers just makes so much sense to me. Then again, these days we can host our single-page JS front-ends on S3 + CloudFront and hook them up to API gateway and Lambda / Beanstalk talking to RDS and "not have any servers" :)

herbst 11y ago

I know thats what i ment with usually you give a fuck, i dont know any way you could run PHP single threaded on a server (i mean there sure is). But its something common you learn when you programm in the other languages i mentioned. I dont think it could get a real issue in a real environment, except someone really wants to fuck with you. But the some fail2ban on to fast requests should fix this easily as the hashes dont actually take that long.

girvo 11y ago
> i dont know any way you could run PHP single threaded on a server Using `php -S 0.0.0.0:80 index.php` would do it!

seanp2k2 11y ago

Even with mod_php you get 1 per fork with the prefork mpm, so this wouldn't even stop some Apache 2.2 box with php4 configured 10 years ago from accepting new connections.