Comment 51 for bug 1445195

@brainv We will do similar tests this weekend and next week. Since we actually faced the read-only mode once more, I am not feeling comfortable yet with the current solution. I am going to try to reproduce the io pattern that we had when system went into read-only. It was something like `git clone` followed by `composer install` (PHP package manager) followed by a php script that creates and migrates mariadb database.