Megatest

  (conc (alist-ref 'host srv-pkt) ":"
	(alist-ref 'port srv-pkt)))
	
(define (server-ready? host port) ;; server-address is host:port
  ;; ping the server and ask it
  ;; if it ready
  (let* ((sdat (servdat-init #f host port #f)))
    (http-transport:send-receive sdat "abc" 'ping '())))

;; from the pkts return servers associated with dbpath
;; NOTE: Only one can be alive - have to check on each
;;       in the list of pkts returned
;;
(define (get-viable-servers serv-pkts dbpath)
  (let loop ((tail serv-pkts)
	     (res  '()))
    (if (null? tail)
	res ;; NOTE: sort by age so oldest is considered first
	(let* ((spkt (car tail)))
	  (loop (cdr tail)
		(if (equal? dbpath (alist-ref 'dbpath spkt))
		    (cons spkt res)
		    res))))))

;; from viable servers get one that is alive and ready
;;
(define (get-the-server serv-pkts)
  (let loop ((tail serv-pkts))
    (if (null? tail)
	#f
	(let* ((spkt (car tail))
	       (host (alist-ref 'ipaddr spkt))
	       (port (alist-ref 'port spkt))
	       (addr (server-address spkt)))
	  (if (server-ready? host port)
	      spkt
	      (loop (cdr tail)))))))

;; am I the "first" in line server? I.e. my D card is smallest

  (let* ((fullname (db:dbname->path apath dbname))
	 (conn     (hash-table-ref/default (rmt:remote-conns remote) fullname #f)))
    (if (and conn
	     (> (current-seconds) (rmt:conn-expires conn)))
	conn
	#f)))

(define (rmt:find-main-server apath dbname)
  (let* ((pktsdir     (get-pkts-dir apath))
	 (all-srvpkts (get-all-server-pkts pktsdir *srvpktspec*))
	 (dbpath      (conc apath "/" dbname))
	 (viable-srvs (get-viable-servers all-srvpkts dbpath)))
    (get-the-server viable-srvs)))

;; looks for a connection to main
;; connections for other servers happens by requesting from main
;;
(define (rmt:open-main-connection remote apath)




  (let* ((dbname         (db:run-id->dbname #f))
	 (the-srv        (rmt:find-main-server apath dbname))
	 (start-main-srv (lambda ()
			   ;; srv not ready, delay a little and try again
			   (system (conc "nbfake megatest -server - -area "apath
					 " -db "dbname))
			   (thread-sleep! 1.5)
			   (rmt:open-main-connection remote apath) ;; TODO: Add limit to number of tries
			   )))
    (if the-srv ;; yes, we have a server, now try connecting to it
	(let* ((srv-addr (server-address the-srv))
	       (srvready (server-ready? srv-addr))
	       (fullpath (db:dbname->path apath dbname)))