Igor Sysoev Wrote:
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> I can not say anuthing about subject, I'm just
> interesting are any
> advanatges to store images in MySQL instead of
> file system ?

First of all quite a lot of backend processes and application code relies on it. Those interfaces cannot be changed easily. But on the other hand for the ease of handling the data. For redundancy it is much easier and more performant to do MySQL replication instead of file system based approaches. With millions of files even when using deep hashed subdirectory trees a full rsync(1) run would take several hours up to half a day to perform a sync. Even when using tools utilizing the inotify(7) framework like lsyncd(1) [1] you have to run a full rsync(1) run from time (e.g., reboots due to kernel updates, inotify event overflow, etc.). With data backup you would face the same issues, too. As company policies discourage the use of AGPL-licenses software, MongoDB/gridfs is also not an option. Our current solution is Apache 2.2 MPM worker/Perl-based but on the long term this does not scale too well anymore, that's why we are looking for alternatives.

[1] http://code.google.com/p/lsyncd/