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by Xylakant 5105 days ago
Disk-based session storage was the default for years and still is. I know of some high-volume sites that used NFS as the sharing mechanism at least up to 2008 and I assume they still do. It kinda works if you do mostly reads. Storing the session in the database was the prime example when session_set_save_handler() was first introduced. The symfony framework still ships with a pdo session handler, so I'd assume people still use it [1] The memcache session handler had major problems with session locking at least as of 2008, I don't know if it's been fixed by now.

[1] https://github.com/symfony/symfony/blob/8ebe624b82dc9f91231e...