Megatest

;; 
(define (dbfile:run-id->path apath run-id)
  (conc apath"/"(dbfile:run-id->dbname run-id)))

(define (db:dbname->path apath dbname)
  (conc apath"/"dbname))

(define num-run-dbs (make-parameter 2))
(define num-run-dbs (make-parameter 4))

(define (dbfile:run-id->dbnum run-id)
  (cond
   ((number? run-id)
    (modulo run-id (num-run-dbs)))
   ((not run-id) "main")   ;; 0 or main?
   (else run-id)))

    (set! *db-write-access* (not (dbr:dbdat-read-only dbdat)))
    ;; (mutex-unlock! *db-open-mutex*)
    dbdat))

(define dbfile:db-init-proc (make-parameter #f))

(define keep-age-param (make-parameter 10))
(define qif-slope      (make-parameter 100))

;; in xmaxima this gives a curve close to what I want:
;;    plot2d ((exp(x/1.2)-1)/300, [x, 0, 10])$
;;    plot2d ((exp(x/1.5)-1)/40, [x, 0, 10])$
;;    plot2d ((exp(x/5)-1)/40, [x, 0, 20])$
(define (dbfile:droop x)
  (/ (- (exp (/ x 5)) 1) 40))
  ;; (* numqrys (/ 1 (qif-slope))))

;; create a dropping near the db file in a qif dir
;; use count of such files to gate queries (queries in flight)
;;
(define (dbfile:wait-for-qif fname run-id params)
  (let* ((thedir  (pathname-directory fname))
	 (dbnum   (dbfile:run-id->dbnum run-id))

				      ;; (delete-file* f)
				      (handle-exceptions
					  exn
					#t
					(file-move f destf #t)))))
			      currlks))
			 1) ;; 50 and above => 1
			((> numqrys 10) (* numqrys (/ 1 (qif-slope)))) ;; slope of 1/100
			((> numqrys 10)  (dbfile:droop numqrys)) ;; slope of 1/100
			;; ((> numqrys 30) 0.50)
			;; ((> numqrys 25) 0.20)
			;; ((> numqrys 20) 0.10)
			;; ((> numqrys 15) 0.05)
			;; ((> numqrys 10) 0.01)
			(else #f))))
	(if (and delayval