generate-many-uid.el

(defun my-make-test-uid-data (st en path)
  (with-temp-buffer
    (loop for i from st to en
          do (insert (format "%014d_vr.ezweb.ne.jp\n" i)))
    (delete-backward-char 1)
    (write-region (point-min) (point-max) path)))

(my-make-test-uid-data 2000000 2004999 "~/2000000_2004999.csv")