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Comment:Fixed -import-megatest.db and -sync-to-megatest.db, fixed dashboard startup with no db
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | 1.70-fixed-sync
Files: files | file ages | folders
SHA1: 9a5898a74edca2d99049994ffc3cdf2dd8fb75a8
User & Date: mmgraham on 2022-06-04 18:08:50
Other Links: branch diff | manifest | tags
Context
2022-06-04
18:08
Fixed -import-megatest.db and -sync-to-megatest.db, fixed dashboard startup with no db Leaf check-in: 9a5898a74e user: mmgraham tags: 1.70-fixed-sync
2022-06-01
21:14
speculative fix check-in: 2f1850785d user: matt tags: v1.70-refactor-procedures
Changes
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Modified dashboard.scm from [e90491091e] to [22b0256617].

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(import (prefix iup iup:))

(use canvas-draw)
(import canvas-draw-iup)
(use ducttape-lib)
(use sqlite3 srfi-1 posix regex regex-case srfi-69 typed-records sparse-vectors) ;; defstruct
(import (prefix sqlite3 sqlite3:))


(declare (uses common))
(declare (uses margs))
(declare (uses keys))
(declare (uses items))
(declare (uses db))
(declare (uses configf))
(declare (uses process))
(declare (uses launch))
(declare (uses runs))
(declare (uses dashboard-tests))
(declare (uses dashboard-guimonitor))
(declare (uses tree))
(declare (uses dcommon))
(declare (uses dashboard-context-menu))
(declare (uses vg))
(declare (uses subrun))
;; (declare (uses dashboard-main))
(declare (uses mt))


(include "common_records.scm")
(include "db_records.scm")
(include "run_records.scm")
(include "task_records.scm")
(include "megatest-version.scm")
(include "megatest-fossil-hash.scm")
(include "vg_records.scm")



(define help (conc 
	      "Megatest Dashboard, documentation at http://www.kiatoa.com/fossils/megatest
  version " megatest-version "
  license GPL, Copyright (C) Matt Welland 2012-2017

Usage: dashboard [options]








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(import (prefix iup iup:))

(use canvas-draw)
(import canvas-draw-iup)
(use ducttape-lib)
(use sqlite3 srfi-1 posix regex regex-case srfi-69 typed-records sparse-vectors) ;; defstruct
(import (prefix sqlite3 sqlite3:))
(import dbfile)

(declare (uses common))
(declare (uses margs))
(declare (uses keys))
(declare (uses items))
(declare (uses db))
(declare (uses configf))
(declare (uses process))
(declare (uses launch))
(declare (uses runs))
(declare (uses dashboard-tests))
(declare (uses dashboard-guimonitor))
(declare (uses tree))
(declare (uses dcommon))
(declare (uses dashboard-context-menu))
(declare (uses vg))
(declare (uses subrun))
;; (declare (uses dashboard-main))
(declare (uses mt))
(declare (uses dbfile))

(include "common_records.scm")
(include "db_records.scm")
(include "run_records.scm")
(include "task_records.scm")
(include "megatest-version.scm")
(include "megatest-fossil-hash.scm")
(include "vg_records.scm")

(dbfile:db-init-proc db:initialize-main-db)

(define help (conc 
	      "Megatest Dashboard, documentation at http://www.kiatoa.com/fossils/megatest
  version " megatest-version "
  license GPL, Copyright (C) Matt Welland 2012-2017

Usage: dashboard [options]
︙︙

Modified db.scm from [451105ba06] to [5bf0387307].

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         (exn (io-error)  (debug:print 0 *default-log-port* "ERROR: i/o error with " fname ". Check permissions, disk space etc. and try again."))
         (exn (corrupt)   (debug:print 0 *default-log-port* "ERROR: database " fname " is corrupt. Repair it to proceed."))
         (exn (busy)      (debug:print 0 *default-log-port* "ERROR: database " fname " is locked. Try copying to another location, remove original and copy back."))
         (exn (permission)(debug:print 0 *default-log-port* "ERROR: database " fname " has some permissions problem."))
         (exn () (debug:print 0 *default-log-port* "ERROR: Unknown error with database " fname " message: " ((condition-property-accessor 'exn 'message) exn))))
	)))

;; This routine creates the db if not already present. It is only called if the db is not already opened
;;
#;(define (db:open-db dbstruct run-id #!key (areapath #f)(do-sync #t))
  (let* ((subdb       (dbfile:get-subdb dbstruct run-id))
	 (tmpdb-stack (dbr:subdb-dbstack subdb))) 
    (if (stack? tmpdb-stack)
	(db:get-subdb tmpdb-stack run-id) ;; get previously opened db (will create new db handle if all in the stack are already used
        (let* ((max-stale-tmp (configf:lookup-number *configdat* "server" "filling-db-max-stale-seconds" default: 10))
               (dbpath       (db:dbfile-path))      ;; path to tmp db area
	       (dbname       (db:run-id->dbname run-id))
               (dbexists     (common:file-exists? dbpath))
	       (mtdbfname    (conc *toppath* "/"dbname))
               (mtdbexists   (common:file-exists? mtdbfname))
               (mtdbmodtime  (if mtdbexists (common:lazy-sqlite-db-modification-time mtdbfname)  #f))
               (mtdb         (db:open-megatest-db mtdbfname))
	       ;; the reference db for syncing
	       (refdbfname   (conc dbpath "/"dbname"_ref"))
               (refndb       (db:open-megatest-db refdbfname))
               ;; (mtdbpath     (dbr:dbdat-dbfile mtdb))
	       ;; the tmpdb
	       (tmpdbfname   (conc dbpath"/"dbname)) ;; /tmp/<stuff>/.db/[main|1,2...].db 
               (tmpdb        (db:open-megatest-db tmpdbfname)) ;; lock-create-open dbpath db:initialize-main-db))
	       (dbfexists    (common:file-exists? tmpdbfname))  ;; (conc dbpath "/megatest.db")))
	       (tmpdbmodtime (if dbfexists  (common:lazy-sqlite-db-modification-time tmpdbfname) #f))

               (write-access (file-write-access? mtdbfname))
	       
	       ;; (mtdbmodtime (if mtdbexists
	       ;; (common:lazy-sqlite-db-modification-time mtdbpath)
	       ;; #f)) ; moving this before db:open-megatest-db is
	       ;; called. if wal mode is on -WAL and -shm file get
	       ;; created with causing the tmpdbmodtime timestamp
	       ;; always greater than mtdbmodtime (tmpdbmodtime (if
	       ;; dbfexists (common:lazy-sqlite-db-modification-time
	       ;; tmpdbfname) #f)) if wal mode is on -WAL and -shm
	       ;; file get created when db:open-megatest-db is
	       ;; called. modtimedelta will always be < 10 so db in
	       ;; tmp not get synced (tmpdbmodtime (if dbfexists
	       ;; (db:get-last-update-time (car tmpdb)) #f)) (fmt
	       ;; (file-modification-time tmpdbfname))
	       
	       (modtimedelta (and mtdbmodtime tmpdbmodtime (- mtdbmodtime tmpdbmodtime))))

          (when write-access
            (sqlite3:execute (dbr:dbdat-dbh mtdb) "drop trigger if exists update_tests_trigger")
            (sqlite3:execute (dbr:dbdat-dbh mtdb) "drop trigger if exists update_runs_trigger"))
          
	  ;; (print "mtdbmodtime " mtdbmodtime " tmpdbmodtime " tmpdbmodtime " mtdbpath " mtdbpath " " (conc *toppath* "/megatest.db"))
	  ;; (debug:print-info 13 *default-log-port* "db:open-db>> mtdbpath="mtdbpath" mtdbexists="mtdbexists" and write-access="write-access)
          (if (and dbexists (not write-access))
              (begin
                (set! *db-write-access* #f)
                (dbr:subdb-read-only-set! subdb #t)))
          (dbr:subdb-mtdb-set!   subdb mtdb)
          (dbr:subdb-tmpdb-set!  subdb tmpdb)
          (dbr:subdb-dbstack-set! subdb (make-stack)) ;; BB: why a stack?  Why would the number of db's be indeterminate?  Is this a legacy of 1.db 2.db .. ?
          (stack-push! (dbr:subdb-dbstack subdb) tmpdb) ;; olddb is already a (cons db path)
          (dbr:subdb-refndb-set! subdb refndb)
          (if (and  (or (not dbfexists)
			(and modtimedelta
			     (> modtimedelta max-stale-tmp))) ;; if db in tmp is over ten seconds older than the file in MTRA then do a sync back
		    do-sync)
	      (begin
		(debug:print 1 *default-log-port* "filling db " (dbr:dbdat-dbfile tmpdb) " with data \n    from " (dbr:dbdat-dbfile mtdb) " mod time delta: " modtimedelta)
		(db:sync-tables (db:sync-all-tables-list subdb) #f mtdb refndb tmpdb)
		;; touch tmp db to avoid wal mode wierdness  
		(set! (file-modification-time tmpdbfname) (current-seconds))  
                (debug:print-info 13 *default-log-port* "db:sync-all-tables-list done.")
                )
	      (debug:print 4 *default-log-port* " db, " (dbr:dbdat-dbfile tmpdb) " already exists or fresh enough, not propogating data from\n     " (dbr:dbdat-dbfile mtdb) " mod time delta: " modtimedelta) )
	  ;; (db:multi-db-sync subdb 'old2new))  ;; migrate data from megatest.db automatically
          tmpdb))))


(define (db:get-last-update-time db)
  (let ((last-update-time #f))
    (sqlite3:for-each-row 
     (lambda (lup) 
       (set! last-update-time lup))     








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         (exn (io-error)  (debug:print 0 *default-log-port* "ERROR: i/o error with " fname ". Check permissions, disk space etc. and try again."))
         (exn (corrupt)   (debug:print 0 *default-log-port* "ERROR: database " fname " is corrupt. Repair it to proceed."))
         (exn (busy)      (debug:print 0 *default-log-port* "ERROR: database " fname " is locked. Try copying to another location, remove original and copy back."))
         (exn (permission)(debug:print 0 *default-log-port* "ERROR: database " fname " has some permissions problem."))
         (exn () (debug:print 0 *default-log-port* "ERROR: Unknown error with database " fname " message: " ((condition-property-accessor 'exn 'message) exn))))
	)))











































































(define (db:get-last-update-time db)
  (let ((last-update-time #f))
    (sqlite3:for-each-row 
     (lambda (lup) 
       (set! last-update-time lup))
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		      ((and changed *time-to-exit*) ;; last sync
		       #t)
		      (else
		       #f))))
	 (if do-cp
	     (let* ((start-time (current-milliseconds))
              (fname (pathname-file file))
              (runid (if (string= fname "main") #f (string->number fname)))
              )
	       (debug:print-info 3 *default-log-port* "db:all-db-sync: fname: "
				 fname", delta: " (- time1 time2) " seconds")
	       (db:lock-and-delta-sync no-sync-db dbstruct fname runid (db:get-keys dbstruct) db:initialize-main-db)
	       (hash-table-set! sync-durations (conc fname".db")
				(- (current-milliseconds) start-time)))
	     (debug:print-info 3 *default-log-port* "skipping sync. " file " is up to date")
         )))
     dbfiles
     )
    (if dbdat (dbfile:add-dbdat dbstruct #f dbdat)))








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		      ((and changed *time-to-exit*) ;; last sync
		       #t)
		      (else
		       #f))))
	 (if do-cp
	     (let* ((start-time (current-milliseconds))
              (fname (pathname-file file))
              (run-id (if (string= fname "main") #f (string->number fname)))
              )
	       (debug:print-info 3 *default-log-port* "db:all-db-sync: fname: "
				 fname", delta: " (- time1 time2) " seconds")
	       (db:lock-and-delta-sync no-sync-db dbstruct fname run-id (db:get-keys dbstruct) db:initialize-main-db)
	       (hash-table-set! sync-durations (conc fname".db")
				(- (current-milliseconds) start-time)))
	     (debug:print-info 3 *default-log-port* "skipping sync. " file " is up to date")
         )))
     dbfiles
     )
    (if dbdat (dbfile:add-dbdat dbstruct #f dbdat)))
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;;  'old2new      - sync megatest.db to /tmp/.../megatest.db and /tmp/.../megatest_ref.db
;;  'new2old      - sync /tmp/.../megatest.db to megatest.db and /tmp/.../megatest_ref.db (and update data_synced)
;;  'closeall     - close all opened dbs
;;  'schema       - attempt to apply schema changes
;;  run-ids: '(1 2 3 ...) or #f (for all)
;;
(define (db:multi-db-sync dbstruct . options)
  (let* ((dbdat       (db:open-db dbstruct #f))
	 (data-synced 0) ;; count of changed records
    (tmp-area       (common:get-db-tmp-area))



    (dbfiles        (glob (conc tmp-area"/.db/*.db")))

    (sync-durations (make-hash-table)))

    (for-each
     (lambda (file)
       (debug:print-info 0 *default-log-port* "file: " file)
       (let* ((fname (conc (pathname-file file) ".db"))
	      (fulln (conc *toppath*"/.db/"fname))
	      (time1 (if (file-exists? file)

			 (file-modification-time file)
			 (begin
			   (debug:print-info 0 *default-log-port* "Sync - I do not see file "file)
			   1)))
	      (time2 (if (file-exists? fulln)
			 (file-modification-time fulln)
			 (begin
			   (debug:print-info 0 *default-log-port* "Sync - I do not see file "fulln)
			   0)))
	      (changed (> time1 time2))
	      (do-cp (cond
		      ((not (file-exists? fulln)) ;; shouldn't happen, but this might recover
		       (debug:print-info 0 *default-log-port* "File "fulln" not found! Copying "fname" to "fulln)
		       #t)
		      (changed ;; (and changed
		       ;; (> (- (current-seconds) time1) 3)) ;; if file is changed and three seconds have passed.
		       #t)
		      ((and changed *time-to-exit*) ;; last sync
		       #t)
		      (else
		       #f))))
	 (if do-cp

	     (let* ((start-time (current-milliseconds)))





	       (debug:print-info 0 *default-log-port* "delta sync delta file: " fname", delta: " (- time1 time2) " seconds")
	       (db:lock-and-delta-sync *no-sync-db* file fulln)






	       (hash-table-set! sync-durations (conc fname".db") (- (current-milliseconds) start-time)))
	     (debug:print-info 0 *default-log-port* "skipping delta sync. " file " is up to date")
         )
       )
     )
     dbfiles
    )


    (hash-table->alist sync-durations)



    (debug:print 0 *default-log-port* "db:multi-db-sync subdbs: " (hash-table-values (dbr:dbstruct-subdbs dbstruct)))
    (for-each
     (lambda (subdb)
       (let* ((mtdb     (dbr:subdb-mtdbdat subdb))
	      (tmpdbfile    (dbr:subdb-tmpdbfile subdb))
              (main-tmpdb (dbfile:open-db dbstruct #f db:initialize-main-db))
	      (allow-cleanup #t) ;; (if run-ids #f #t))
	      (servers  (server:get-list *toppath*)) ;; (tasks:get-all-servers (db:delay-if-busy tdbdat)))
	      )    
         (debug:print 0 *default-log-port* "db:multi-db-sync mtdb: " mtdb " tmpdbfile:" tmpdbfile )
	 (for-each
	  (lambda (option)
	    
	    (case option
	      ;; kill servers
	      ((killservers)
	       (for-each
		(lambda (server)
		  (handle-exceptions
		      exn
		      (begin 
			(debug:print-info 0 *default-log-port*  "Unable to get host and/or port from " server ", exn=" exn)     
			#f)
		    (match-let (((mod-time host port start-time server-id pid) server))
		      (if (and host pid)
			  (tasks:kill-server host pid)))))
		servers)
	       
	       ;; /tmp/bjbarcla/megatest_localdb/fullrun/.nfs.pdx.disks.icf_env_disk001.bjbarcla.gwa.issues.mtdev.matt-bisect.megatest.ext-tests.runs.all.v1.65.1.6524.dev.bb-24-justrollup-f8.rollup.fullrun/megatest.db.lock
	       (delete-file* (common:get-sync-lock-filepath)))
	      
	      ;; clear out junk records
	      ;;
	      ((dejunk)
	       ;; (db:delay-if-busy mtdb) ;; ok to delay on mtdb
	       (when (file-write-access? (dbr:dbdat-dbfile mtdb)) (db:clean-up mtdb))
	       (db:clean-up main-tmpdb)
              )
	      ;; sync from main dbs to /tmp ones.
	      ;;
	      ((old2new)
	       (set! data-synced
		 (+ (db:sync-tables (db:sync-all-tables-list dbstruct) #f mtdb main-tmpdb)
		    data-synced)))
	      
	      ;; sync from /tmp dbs to main ones.
	      ;;
	      ((new2old)
	       (set! data-synced
		 (+ (db:sync-tables (db:sync-all-tables-list dbstruct) #f main-tmpdb mtdb)
		    data-synced)))

	      ((adj-target)
	       (db:adj-target (dbr:dbdat-dbh mtdb))
	       (db:adj-target (dbr:dbdat-dbh main-tmpdb))
              )
	      
	      ((schema)
	       (db:patch-schema-maindb (dbr:dbdat-dbh mtdb))
	       (db:patch-schema-maindb (dbr:dbdat-dbh main-tmpdb))
	       (db:patch-schema-rundb  (dbr:dbdat-dbh mtdb))
	       (db:patch-schema-rundb  (dbr:dbdat-dbh main-tmpdb))
               )
              )
	    (dbfile:add-dbdat dbstruct #f main-tmpdb))
	  options)))
     (hash-table-values (dbr:dbstruct-subdbs dbstruct)))
    (if dbdat (dbfile:add-dbdat dbstruct #f dbdat))
    data-synced)
)

;; Sync all changed db's
;;
(define (db:tmp->megatest.db-sync dbstruct run-id last-update)
  (let* ((subdbs (hash-table-values (dbr:dbstruct-subdbs dbstruct)))
	 (res    '()))
    (for-each
     (lambda (subdb)
       (let* ((dbname (db:run-id->dbname run-id))
	      (mtdb   (dbr:subdb-mtdb subdb))
	      (tmpdb  (db:get-subdb dbstruct run-id))
	      (refndb (dbr:subdb-refndb subdb))
	      (newres (db:sync-tables (db:sync-all-tables-list dbstruct) last-update tmpdb refndb mtdb)))
	 ;; (stack-push! (dbr:subdb-dbstack subdb) tmpdb)
	 (dbfile:add-dbdat dbstruct run-id tmpdb)
	 (set! res (cons newres res))))
     subdbs)
    res))

;;;; run-ids








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;;  'old2new      - sync megatest.db to /tmp/.../megatest.db and /tmp/.../megatest_ref.db
;;  'new2old      - sync /tmp/.../megatest.db to megatest.db and /tmp/.../megatest_ref.db (and update data_synced)
;;  'closeall     - close all opened dbs
;;  'schema       - attempt to apply schema changes
;;  run-ids: '(1 2 3 ...) or #f (for all)
;;
(define (db:multi-db-sync dbstruct . options)
  (let* ((dbdat       (db:open-db dbstruct #f db:initialize-main-db))
	 (data-synced 0) ;; count of changed records
    (tmp-area       (common:get-db-tmp-area))
    (old2new (member 'old2new options)) 
    (src-area (if old2new *toppath* tmp-area))
    (dest-area (if old2new tmp-area *toppath*))
    (dbfiles        (glob (conc src-area"/.db/*.db")))
    (keys (db:get-keys dbstruct))
    (sync-durations (make-hash-table)))
    
   (for-each
     (lambda (srcfile)
       (debug:print-info 3 *default-log-port* "file: " srcfile)
       (let* ((fname (conc (pathname-file srcfile) ".db"))
              (basename (pathname-file srcfile))
              (run-id (if (string= basename "main") #f (string->number basename)))
	      (destfile (conc dest-area "/.db/" fname))
	      (time1 (file-modification-time srcfile))



	      (time2 (if (file-exists? destfile)
			 (file-modification-time destfile)
			 (begin
			   (debug:print-info 0 *default-log-port* "Sync - I do not see file " destfile)
			   0)))
	      (changed (> time1 time2))
	      (do-cp (cond
		      ((not (file-exists? destfile)) ;; shouldn't happen, but this might recover
		       (debug:print-info 0 *default-log-port* "File " destfile " not found! Copying "srcfile" to "destfile)
		       #t)
		      (changed ;; (and changed
		       ;; (> (- (current-seconds) time1) 3)) ;; if file is changed and three seconds have passed.
		       #t)
		      ((and changed *time-to-exit*) ;; last sync
		       #t)
		      (else
		       #f))))
          (if do-cp
	     (let* (
                    (start-time (current-milliseconds))
                    (subdb (or (dbfile:get-subdb dbstruct run-id) (dbfile:init-subdb dbstruct run-id dbfile:db-init-proc)))
                    (mtdb      (dbr:subdb-mtdbdat subdb))
                    (tmpdb     (dbfile:open-db dbstruct run-id dbfile:db-init-proc))

                    )
	       (debug:print-info 0 *default-log-port* "delta syncing file: " srcfile ", time diff: " (- time1 time2) " seconds")

               (if old2new
		 (db:sync-tables (db:sync-all-tables-list dbstruct (db:get-keys dbstruct)) #f mtdb tmpdb)
		 (db:sync-tables (db:sync-all-tables-list dbstruct (db:get-keys dbstruct)) #f tmpdb mtdb)
               )


	       (hash-table-set! sync-durations (conc srcfile ".db") (- (current-milliseconds) start-time)))
	     (debug:print-info 0 *default-log-port* "skipping delta sync. " srcfile " is up to date")
          )
       )
     )
     dbfiles
    )

















































    data-synced
  )
























)

;; Sync all changed db's
;;
(define (db:tmp->megatest.db-sync dbstruct run-id last-update)
  (let* ((subdbs (hash-table-values (dbr:dbstruct-subdbs dbstruct)))
	 (res    '()))
    (for-each
     (lambda (subdb)
       (let* ((dbname (db:run-id->dbname run-id))
	      (mtdb   (dbr:subdb-mtdb subdb))
	      (tmpdb  (db:get-subdb dbstruct run-id))
	      (refndb (dbr:subdb-refndb subdb))
	      (newres (db:sync-tables (db:sync-all-tables-list dbstruct (db:get-keys dbstruct)) last-update tmpdb refndb mtdb)))
	 ;; (stack-push! (dbr:subdb-dbstack subdb) tmpdb)
	 (dbfile:add-dbdat dbstruct run-id tmpdb)
	 (set! res (cons newres res))))
     subdbs)
    res))

;;;; run-ids
︙︙

Modified dbfile.scm from [6257400a66] to [ec5e9b082c].

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	       "ERROR: database " fname " has some permissions problem."))
         (exn ()
	      (dbfile:print-and-exit
	       "ERROR: Unknown error with database " fname " message: " ((condition-property-accessor 'exn 'message) exn))))
	)))


;; This routine creates the db if not already present. It is only called if the db is not already opened
;;
#;(define (db:init-dbstruct dbstruct run-id init-proc #!key (do-sync #t))
  (let* ((subdb          (dbfile:get-subdb dbstruct run-id))
	 (tmpdb-stack    (dbr:subdb-dbstack subdb)) 
	 (max-stale-tmp  (dbr:dbstruct-max-stale-secs dbstruct));; (configf:lookup-number *configdat* "server" "filling-db-max-stale-seconds" default: 10))
	   (dbpath       (dbr:dbstruct-tmppath dbstruct)) ;;  (db:dbfile-path))      ;; path to tmp db area
	   (dbname       (dbfile:run-id->dbname run-id))
	   (dbexists     (file-exists? dbpath))
	   (areapath     (dbr:dbstruct-areapath dbstruct))
	   (mtdbfname    (conc areapath "/"dbname))
	   (mtdbexists   (file-exists? mtdbfname))
	   (mtdbmodtime  (if mtdbexists (dbfile:lazy-sqlite-db-modification-time mtdbfname)  #f))
	   (mtdb         (db:open-sqlite-db mtdbfname init-proc))
	   ;; the reference db for syncing
	   (refdbfname   (conc dbpath "/"dbname"_ref"))
	   (refndb       (db:open-megatest-db refdbfname))
	   ;; (mtdbpath     (dbr:dbdat-dbfile mtdb))
	   ;; the tmpdb
	   (tmpdbfname   (conc dbpath"/"dbname)) ;; /tmp/<stuff>/.db/[main|1,2...].db 
	   (tmpdb        (db:open-megatest-db tmpdbfname)) ;; lock-create-open dbpath db:initialize-main-db))
	   (dbfexists    (common:file-exists? tmpdbfname))  ;; (conc dbpath "/megatest.db")))
	   (tmpdbmodtime (if dbfexists  (common:lazy-sqlite-db-modification-time tmpdbfname) #f))
	   
	   (write-access (file-write-access? mtdbfname))
	   
	   ;; (mtdbmodtime (if mtdbexists
	   ;; (common:lazy-sqlite-db-modification-time mtdbpath)
	   ;; #f)) ; moving this before db:open-megatest-db is
	   ;; called. if wal mode is on -WAL and -shm file get
	   ;; created with causing the tmpdbmodtime timestamp
	   ;; always greater than mtdbmodtime (tmpdbmodtime (if
	   ;; dbfexists (common:lazy-sqlite-db-modification-time
	   ;; tmpdbfname) #f)) if wal mode is on -WAL and -shm
	   ;; file get created when db:open-megatest-db is
	   ;; called. modtimedelta will always be < 10 so db in
	   ;; tmp not get synced (tmpdbmodtime (if dbfexists
	   ;; (db:get-last-update-time (car tmpdb)) #f)) (fmt
	   ;; (file-modification-time tmpdbfname))
	   
	   (modtimedelta (and mtdbmodtime tmpdbmodtime (- mtdbmodtime tmpdbmodtime))))

    (when write-access
      (sqlite3:execute (dbr:dbdat-dbh mtdb) "drop trigger if exists update_tests_trigger")
      (sqlite3:execute (dbr:dbdat-dbh mtdb) "drop trigger if exists update_runs_trigger"))
    
    ;; (print "mtdbmodtime " mtdbmodtime " tmpdbmodtime " tmpdbmodtime " mtdbpath " mtdbpath " " (conc *toppath* "/megatest.db"))
    ;; (debug:print-info 13 *default-log-port* "db:open-db>> mtdbpath="mtdbpath" mtdbexists="mtdbexists" and write-access="write-access)
    (if (and dbexists (not write-access))
	(begin
	  (set! *db-write-access* #f)
	  (dbr:subdb-read-only-set! subdb #t)))
    (dbr:subdb-mtdb-set!   subdb mtdb)
    (dbr:subdb-tmpdb-set!  subdb tmpdb)
    (dbr:subdb-dbstack-set! subdb (make-stack)) ;; BB: why a stack?  Why would the number of db's be indeterminate?  Is this a legacy of 1.db 2.db .. ?
    (stack-push! (dbr:subdb-dbstack subdb) tmpdb) ;; olddb is already a (cons db path)
    (dbr:subdb-refndb-set! subdb refndb)
    (if (and  (or (not dbfexists)
		  (and modtimedelta
		       (> modtimedelta max-stale-tmp))) ;; if db in tmp is over ten seconds older than the file in MTRA then do a sync back
	      do-sync)
	(begin
	  (dbfile:print-err "filling db " (dbr:dbdat-dbfile tmpdb) " with data \n    from " (dbr:dbdat-dbfile mtdb) " mod time delta: " modtimedelta)
	  (db:sync-tables (db:sync-all-tables-list subdb) #f mtdb refndb tmpdb)
	  ;; touch tmp db to avoid wal mode wierdness  
	  (set! (file-modification-time tmpdbfname) (current-seconds))  
	  (dbfile:print-err "INFO: db:sync-all-tables-list done.")
	  )
	(dbfile:print-err " db, " (dbr:dbdat-dbfile tmpdb) " already exists or fresh enough, not propogating data from\n     " (dbr:dbdat-dbfile mtdb) " mod time delta: " modtimedelta) )
    ;; (db:multi-db-sync subdb 'old2new))  ;; migrate data from megatest.db automatically
    tmpdb))
		
;;======================================================================
;; no-sync.db - small bits of data to be shared between servers
;;======================================================================

;; if we are not a server create a db handle. this is not finalized
;; so watch for problems. I'm still not clear if it is needed to manually








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	       "ERROR: database " fname " has some permissions problem."))
         (exn ()
	      (dbfile:print-and-exit
	       "ERROR: Unknown error with database " fname " message: " ((condition-property-accessor 'exn 'message) exn))))
	)))









































































		
;;======================================================================
;; no-sync.db - small bits of data to be shared between servers
;;======================================================================

;; if we are not a server create a db handle. this is not finalized
;; so watch for problems. I'm still not clear if it is needed to manually
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                         slave-dbs)))
                   (for-each
                    (lambda (bad-dbdat)
                      (dbfile:print-err "db:sync-tables called with todb not a read-only database " bad-dbdat))
                    readonly-slave-dbs)
                   readonly-slave-dbs))) -6)
    (else
     (dbfile:print-err "db:sync-tables: args are good")

     (let ((stmts       (make-hash-table)) ;; table-field => stmt
	   (all-stmts   '())              ;; ( ( stmt1 value1 ) ( stml2 value2 ))
	   (numrecs     (make-hash-table))
	   (start-time  (current-milliseconds))
	   (tot-count   0))
       (for-each ;; table








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                         slave-dbs)))
                   (for-each
                    (lambda (bad-dbdat)
                      (dbfile:print-err "db:sync-tables called with todb not a read-only database " bad-dbdat))
                    readonly-slave-dbs)
                   readonly-slave-dbs))) -6)
    (else
    ;; (dbfile:print-err "db:sync-tables: args are good")

     (let ((stmts       (make-hash-table)) ;; table-field => stmt
	   (all-stmts   '())              ;; ( ( stmt1 value1 ) ( stml2 value2 ))
	   (numrecs     (make-hash-table))
	   (start-time  (current-milliseconds))
	   (tot-count   0))
       (for-each ;; table
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					      #f))
                      (is-trigger-dropped (if (member "last_update" field-names)
                                              (db:is-trigger-dropped db tablename)
					      #f)) 
		      (stmth  (sqlite3:prepare db full-ins))
                      (changed-rows 0))
		 ;; (db:delay-if-busy targdb) ;; NO WAITING
                 (if (member "last_update" field-names)
                     (dbfile:print-err "is-trigger-dropped: " is-trigger-dropped)) 

		 (for-each
		  (lambda (fromdat-lst)
		    (sqlite3:with-transaction
		     db
		     (lambda ()
		       (for-each ;; 








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					      #f))
                      (is-trigger-dropped (if (member "last_update" field-names)
                                              (db:is-trigger-dropped db tablename)
					      #f)) 
		      (stmth  (sqlite3:prepare db full-ins))
                      (changed-rows 0))
		 ;; (db:delay-if-busy targdb) ;; NO WAITING
                 ;; (if (member "last_update" field-names)
                 ;;    (dbfile:print-err "is-trigger-dropped: " is-trigger-dropped)) 

		 (for-each
		  (lambda (fromdat-lst)
		    (sqlite3:with-transaction
		     db
		     (lambda ()
		       (for-each ;;
︙︙

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