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Comment:Remove traces of inmem
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Timelines: family | ancestors | descendants | both | v1.80
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SHA1: 5a507eea4f312392457a8ce985ccccdb328dd7f1
User & Date: matt on 2023-05-13 22:37:15
Other Links: branch diff | manifest | tags
Context
2023-05-14
20:36
Formalize /tmp directory creation for consistent usage and ultimately to accomodate second sync to dashboard on readonly check-in: 9a780869ba user: matt tags: v1.80
2023-05-13
22:37
Remove traces of inmem check-in: 5a507eea4f user: matt tags: v1.80
20:11
key is todisk, not todest. Although todest would be more sensible but the attach sync prevents being sensible. check-in: de7cca3a62 user: matt tags: v1.80
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Modified api.scm from [9008afe383] to [2b9d1ebcdc].

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    teststep-set-status!
    delete-steps-for-test
    ;; TEST DATA
    test-data-rollup
    csv->test-data

    ;; MISC
    sync-inmem->db
    drop-all-triggers
    create-all-triggers
    update-tesdata-on-repilcate-db 

    ;; TESTMETA
    testmeta-add-record
    testmeta-update-field








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    teststep-set-status!
    delete-steps-for-test
    ;; TEST DATA
    test-data-rollup
    csv->test-data

    ;; MISC
    sync-cachedb->db
    drop-all-triggers
    create-all-triggers
    update-tesdata-on-repilcate-db 

    ;; TESTMETA
    testmeta-add-record
    testmeta-update-field
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    ((delete-steps-for-test!)       (apply db:delete-steps-for-test! dbstruct params))
    
    ;; TEST DATA
    ((test-data-rollup)             (apply db:test-data-rollup dbstruct params))
    ((csv->test-data)               (apply db:csv->test-data dbstruct params))

    ;; MISC
    ((sync-inmem->db)               (let ((run-id (car params)))
                                      (db:sync-touched dbstruct run-id db:initialize-main-db force-sync: #t)))
    ((get-toplevels-and-incompletes) (apply db:get-toplevels-and-incompletes dbstruct params))
    ((mark-incomplete)              #f);;(thread-start! (make-thread (lambda () ;; no need to block on this one
					;;			  (apply db:find-and-mark-incomplete dbstruct params)
					;;			  #t)))) 
    ((create-all-triggers)          (db:create-all-triggers dbstruct))
    ((drop-all-triggers)            (db:drop-all-triggers dbstruct)) 








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    ((delete-steps-for-test!)       (apply db:delete-steps-for-test! dbstruct params))
    
    ;; TEST DATA
    ((test-data-rollup)             (apply db:test-data-rollup dbstruct params))
    ((csv->test-data)               (apply db:csv->test-data dbstruct params))

    ;; MISC
    ((sync-cachedb->db)               (let ((run-id (car params)))
                                      (db:sync-touched dbstruct run-id db:initialize-main-db force-sync: #t)))
    ((get-toplevels-and-incompletes) (apply db:get-toplevels-and-incompletes dbstruct params))
    ((mark-incomplete)              #f);;(thread-start! (make-thread (lambda () ;; no need to block on this one
					;;			  (apply db:find-and-mark-incomplete dbstruct params)
					;;			  #t)))) 
    ((create-all-triggers)          (db:create-all-triggers dbstruct))
    ((drop-all-triggers)            (db:drop-all-triggers dbstruct))
︙︙

Modified commonmod.scm from [a0125e2f23] to [409ebb7538].

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;;
;;======================================================================

(include "megatest-version.scm")
(include "megatest-fossil-hash.scm")

;; http - use the old http + in /tmp db
;; tcp  - use tcp transport with inmem db
;; nfs  - use direct to disk access (read-only)
;;
(define rmt:transport-mode (make-parameter 'tcp))

(define (get-full-version)
  (conc megatest-version "-" megatest-fossil-hash))









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;;
;;======================================================================

(include "megatest-version.scm")
(include "megatest-fossil-hash.scm")

;; http - use the old http + in /tmp db
;; tcp  - use tcp transport with cachedb db
;; nfs  - use direct to disk access (read-only)
;;
(define rmt:transport-mode (make-parameter 'tcp))

(define (get-full-version)
  (conc megatest-version "-" megatest-fossil-hash))
︙︙

Modified dashboard-transport-mode.scm.template from [a59a3f6e5f] to [9dcd4f036e]. 

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;;======================================================================
;; set up transport, db cache and sync methods
;;
;; sync-method:        'original, 'attach or 'none
;; cache-method:       'tmp, 'inmem or 'none
;; rmt:transport-mode: 'http, 'tcp, 'nfs
;;
;; NOTE: NOT ALL COMBINATIONS WORK
;;
;;======================================================================

;; uncomment this block to test without tcp or inmem
;; (dbfile:sync-method 'none)
;; (dbfile:cache-method 'none)
;; (rmt:transport-mode 'nfs)

;; uncomment this block to test with tcp and inmem
(dbfile:sync-method 'original)
(dbfile:cache-method 'none)
(rmt:transport-mode 'nfs)







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;;======================================================================
;; set up transport, db cache and sync methods
;;
;; sync-method:        'original, 'attach or 'none
;; cache-method:       'tmp or 'none
;; rmt:transport-mode: 'http, 'tcp, 'nfs
;;
;; NOTE: NOT ALL COMBINATIONS WORK
;;
;;======================================================================

;; uncomment this block to test without tcp or cachedb
;; (dbfile:sync-method 'none)
;; (dbfile:cache-method 'none)
;; (rmt:transport-mode 'nfs)

;; uncomment this block to test with tcp and cachedb
(dbfile:sync-method 'original)
(dbfile:cache-method 'none)
(rmt:transport-mode 'nfs)

Modified db.scm from [221cd6a9de] to [0e4a030db5].

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	  (db:open-db dbstruct run-id areapath: (dbr:dbstruct-areapath dbstruct) do-sync: #t)
	  newsubdb))))

;; Get/open a database
;;    if run-id => get run specific db
;;    if #f     => get main db
;;    if run-id is a string treat it as a filename
;;    if db already open - return inmem
;;    if db not open, open inmem, rundb and sync then return inmem
;;    inuse gets set automatically for rundb's
;;
;; (define db:get-db db:get-subdb)

;; (define (db:get-db subdb #;dbstruct run-id) ;; RENAME TO db:get-dbh
;;   ;; (let* ((subdb (dbfile:get-subdb dbstruct run-id)))
;;     (if (stack? (dbr:subdb-dbstack subdb))








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	  (db:open-db dbstruct run-id areapath: (dbr:dbstruct-areapath dbstruct) do-sync: #t)
	  newsubdb))))

;; Get/open a database
;;    if run-id => get run specific db
;;    if #f     => get main db
;;    if run-id is a string treat it as a filename
;;    if db already open - return cachedb
;;    if db not open, open cachedb, rundb and sync then return cachedb
;;    inuse gets set automatically for rundb's
;;
;; (define db:get-db db:get-subdb)

;; (define (db:get-db subdb #;dbstruct run-id) ;; RENAME TO db:get-dbh
;;   ;; (let* ((subdb (dbfile:get-subdb dbstruct run-id)))
;;     (if (stack? (dbr:subdb-dbstack subdb))
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		     (set! res (cons (make-simple-run target id runname state status owner event_time) res)))
		   db
		   qrystr
		   )))
    (debug:print-info 11 *default-log-port* "db:get-runs END qrystr: " qrystr " target: " target " offset: " offset " limit: " count)
    res))

;; TODO: Switch this to use max(update_time) from each run db? Then if using a server there is no disk traffic (using inmem db)
;;
;; NOTE: This DOESN'T (necessarily) get the real run ids, but the number of the <number>.db!!

(define (db:get-changed-run-ids since-time)
  (let* ((dbdir      (db:dbfile-path)) ;; (configf:lookup *configdat* "setup" "dbdir"))
	 (alldbs     (glob (conc dbdir "/.mtdb/[0-9]*.db*")))
	 (changed    (filter (lambda (dbfile)








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		     (set! res (cons (make-simple-run target id runname state status owner event_time) res)))
		   db
		   qrystr
		   )))
    (debug:print-info 11 *default-log-port* "db:get-runs END qrystr: " qrystr " target: " target " offset: " offset " limit: " count)
    res))

;; TODO: Switch this to use max(update_time) from each run db? Then if using a server there is no disk traffic (using cachedb db) ???
;;
;; NOTE: This DOESN'T (necessarily) get the real run ids, but the number of the <number>.db!!

(define (db:get-changed-run-ids since-time)
  (let* ((dbdir      (db:dbfile-path)) ;; (configf:lookup *configdat* "setup" "dbdir"))
	 (alldbs     (glob (conc dbdir "/.mtdb/[0-9]*.db*")))
	 (changed    (filter (lambda (dbfile)
︙︙

Modified dbfile.scm from [5aff2586ce] to [c2d21d64d9].

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;; parameters
;;
(define dbfile:testsuite-name (make-parameter #f))

(define keep-age-param        (make-parameter 10))      ;; qif file age, if over move to attic
(define num-run-dbs           (make-parameter 10))      ;; number of db's in .mtdb
(define dbfile:sync-method    (make-parameter 'attach)) ;; 'attach or 'original
(define dbfile:cache-method   (make-parameter 'inmem))  ;; 'direct
(define dbcache-mode (make-parameter 'tmp)) ;; 'inmem, 'tmp (changes what open inmem routine does)


;; 'original     - use old condition code
;; 'suicide-mode - create mtrah/stop-the-train with info on what went wrong
;; else use no condition code (should be production mode)
;;
(define no-condition-db-with-db (make-parameter 'suicide-mode))








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;; parameters
;;
(define dbfile:testsuite-name (make-parameter #f))

(define keep-age-param        (make-parameter 10))      ;; qif file age, if over move to attic
(define num-run-dbs           (make-parameter 10))      ;; number of db's in .mtdb
(define dbfile:sync-method    (make-parameter 'attach)) ;; 'attach or 'original
(define dbfile:cache-method   (make-parameter 'cachedb))  ;; 'direct
(define dbcache-mode (make-parameter 'tmp)) ;; 'cachedb, 'tmp (changes what open cachedb routine does)


;; 'original     - use old condition code
;; 'suicide-mode - create mtrah/stop-the-train with info on what went wrong
;; else use no condition code (should be production mode)
;;
(define no-condition-db-with-db (make-parameter 'suicide-mode))
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(defstruct dbr:dbstruct
  (areapath  #f)
  (homehost  #f)
  (tmppath   #f)
  (read-only #f)
  (subdbs (make-hash-table))
  ;;
  ;; for the inmem approach (see dbmod.scm)
  ;; this is one db per server
  (inmem     #f)  ;; handle for the in memory copy
  (dbfile    #f)  ;; path to the db file on disk
  (dbfname   #f)  ;; short name of db file on disk (used to validate accessing correct db)
  (ondiskdb  #f)  ;; handle for the on-disk file
  (dbtmpname #f)  ;; path to db file in /tmp (non-imem method)
  (dbdat     #f)  ;; create a dbdat for the downstream calls such as db:with-db
  (last-update 0)
  (sync-proc #f)








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(defstruct dbr:dbstruct
  (areapath  #f)
  (homehost  #f)
  (tmppath   #f)
  (read-only #f)
  (subdbs (make-hash-table))
  ;;
  ;; for the cachedb approach (see dbmod.scm)
  ;; this is one db per server
  (cachedb     #f)  ;; handle for the in memory copy
  (dbfile    #f)  ;; path to the db file on disk
  (dbfname   #f)  ;; short name of db file on disk (used to validate accessing correct db)
  (ondiskdb  #f)  ;; handle for the on-disk file
  (dbtmpname #f)  ;; path to db file in /tmp (non-imem method)
  (dbdat     #f)  ;; create a dbdat for the downstream calls such as db:with-db
  (last-update 0)
  (sync-proc #f)
︙︙
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;; Get/open a database.
;;
;;    NOTE: most usage should call dbfile:open-db to get a dbdat
;;
;;    if run-id => get run specific db
;;    if #f     => get main db
;;    if run-id is a string treat it as a filename - DON'T use this - we'll get rid of it.
;;    if db already open - return inmem
;;    if db not open, open inmem, rundb and sync then return inmem
;;    inuse gets set automatically for rundb's
;;
(define (dbfile:get-dbdat dbstruct run-id)
  (let* ((subdb (dbfile:get-subdb dbstruct run-id)))
    (if (stack-empty? (dbr:subdb-dbstack subdb))
	#f
	(begin








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;; Get/open a database.
;;
;;    NOTE: most usage should call dbfile:open-db to get a dbdat
;;
;;    if run-id => get run specific db
;;    if #f     => get main db
;;    if run-id is a string treat it as a filename - DON'T use this - we'll get rid of it.
;;    if db already open - return cachedb
;;    if db not open, open cachedb, rundb and sync then return cachedb
;;    inuse gets set automatically for rundb's
;;
(define (dbfile:get-dbdat dbstruct run-id)
  (let* ((subdb (dbfile:get-subdb dbstruct run-id)))
    (if (stack-empty? (dbr:subdb-dbstack subdb))
	#f
	(begin
︙︙

Modified dbmod.scm from [a109383da4] to [659c649b0a].

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  (conc (dbmod:get-dbdir dbstruct

			 run-id

			 )"/"(dbmod:run-id->dbfname run-id)))

;;======================================================================
;; Read-only inmem cached direct from disk method
;;======================================================================

(define *dbmod:nfs-db-handles* (make-hash-table)) ;; dbfname -> dbstruct

;; called in rmt.scm nfs-transport-handler
(define (dbmod:nfs-get-dbstruct run-id keys init-proc areapath)
  (assert areapath "FATAL: dbmod:nfs-get-dbstruct called without areapath set.")
  (let* ((dbfname  (dbmod:run-id->dbfname run-id))
	 (dbstruct (hash-table-ref/default *dbmod:nfs-db-handles* dbfname #f)))
    (if dbstruct
	dbstruct
	(let* ((newdbstruct (dbmod:open-dbmoddb areapath run-id dbfname init-proc keys syncdir: 'fromdisk)))
	  (hash-table-set! *dbmod:nfs-db-handles* dbfname newdbstruct)
	  newdbstruct))))

;;======================================================================
;; The inmem one-db file per server method goes in here
;;======================================================================

;; NOTE: the r/w is now w/r, #t=db modified by query, #f=db NOT modified by query
(define (dbmod:with-db dbstruct run-id w/r proc params)
  (let* ((use-mutex (or (and w/r ;; use the mutex on queries that modify the db and for sync to disk
			     (> *api-process-request-count* 5)) ;; when writes are happening throttle more
			(> *api-process-request-count* 50)))
	 (dbdat     (dbmod:open-db dbstruct run-id (dbfile:db-init-proc)))
	 (dbh       (dbr:dbdat-dbh dbdat)) ;; this will be the inmem handle
	 (dbfile    (dbr:dbdat-dbfile dbdat)))
    ;; if nfs mode do a sync if delta > 2
    (let* ((last-update (dbr:dbstruct-last-update dbstruct))
	   (sync-proc   (dbr:dbstruct-sync-proc dbstruct))
	   (curr-secs   (current-seconds)))
      (if (and (not (eq? (dbfile:cache-method) 'none)) ;; used by dashboard, no need for sync
	       (> (- curr-secs last-update) 5))








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  (conc (dbmod:get-dbdir dbstruct

			 run-id

			 )"/"(dbmod:run-id->dbfname run-id)))

;;======================================================================
;; Read-only cachedb cached direct from disk method
;;======================================================================

(define *dbmod:nfs-db-handles* (make-hash-table)) ;; dbfname -> dbstruct

;; called in rmt.scm nfs-transport-handler
(define (dbmod:nfs-get-dbstruct run-id keys init-proc areapath)
  (assert areapath "FATAL: dbmod:nfs-get-dbstruct called without areapath set.")
  (let* ((dbfname  (dbmod:run-id->dbfname run-id))
	 (dbstruct (hash-table-ref/default *dbmod:nfs-db-handles* dbfname #f)))
    (if dbstruct
	dbstruct
	(let* ((newdbstruct (dbmod:open-dbmoddb areapath run-id dbfname init-proc keys syncdir: 'fromdisk)))
	  (hash-table-set! *dbmod:nfs-db-handles* dbfname newdbstruct)
	  newdbstruct))))

;;======================================================================
;; The cachedb one-db file per server method goes in here
;;======================================================================

;; NOTE: the r/w is now w/r, #t=db modified by query, #f=db NOT modified by query
(define (dbmod:with-db dbstruct run-id w/r proc params)
  (let* ((use-mutex (or (and w/r ;; use the mutex on queries that modify the db and for sync to disk
			     (> *api-process-request-count* 5)) ;; when writes are happening throttle more
			(> *api-process-request-count* 50)))
	 (dbdat     (dbmod:open-db dbstruct run-id (dbfile:db-init-proc)))
	 (dbh       (dbr:dbdat-dbh dbdat)) ;; this will be the cachedb handle
	 (dbfile    (dbr:dbdat-dbfile dbdat)))
    ;; if nfs mode do a sync if delta > 2
    (let* ((last-update (dbr:dbstruct-last-update dbstruct))
	   (sync-proc   (dbr:dbstruct-sync-proc dbstruct))
	   (curr-secs   (current-seconds)))
      (if (and (not (eq? (dbfile:cache-method) 'none)) ;; used by dashboard, no need for sync
	       (> (- curr-secs last-update) 5))
︙︙
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    (let* ((res (apply proc dbdat dbh params)))
      (if use-mutex (mutex-unlock! *db-with-db-mutex*))
      res)))

(define (db:with-db dbstruct run-id w/r proc . params)
  (dbmod:with-db dbstruct run-id w/r proc params))


(define (dbmod:open-inmem-db init-proc #!optional (dbfullname #f))
  (let* ((db      (if dbfullname
		      (dbmod:safely-open-db dbfullname init-proc #t)
		      (sqlite3:open-database ":memory:")))
	 (handler (sqlite3:make-busy-timeout 3600)))
    (sqlite3:set-busy-handler! db handler)
    (init-proc db)
    db))

(define (dbmod:open-db dbstruct run-id dbinit)
  (or (dbr:dbstruct-dbdat dbstruct)
      (let* ((dbdat (make-dbr:dbdat
		     dbfile: (dbr:dbstruct-dbfile dbstruct)
		     dbh:    (dbr:dbstruct-inmem  dbstruct)
		     )))
	(dbr:dbstruct-dbdat-set! dbstruct dbdat)
	dbdat)))

;; NOT USED?
(define (dbmod:need-on-disk-db-handle)
    (case (dbfile:cache-method)
      ((none tmp) #t)
      ((inmem)
       (case (dbfile:sync-method)
	 ((original) #t)
	 ((attach)   #t) ;; we need it to force creation of the on-disk file - FIXME
	 (else
	  (debug:print 0 *default-log-port* "Unknown dbfile:sync-method setting: "
		       (dbfile:sync-method)))))
      (else








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    (let* ((res (apply proc dbdat dbh params)))
      (if use-mutex (mutex-unlock! *db-with-db-mutex*))
      res)))

(define (db:with-db dbstruct run-id w/r proc . params)
  (dbmod:with-db dbstruct run-id w/r proc params))

;; 
(define (dbmod:open-cachedb-db init-proc dbfullname)
  (let* ((db      (if dbfullname
		      (dbmod:safely-open-db dbfullname init-proc #t)
		      (sqlite3:open-database ":memory:")))
	 (handler (sqlite3:make-busy-timeout 3600)))
    (sqlite3:set-busy-handler! db handler)
    (init-proc db)
    db))

(define (dbmod:open-db dbstruct run-id dbinit)
  (or (dbr:dbstruct-dbdat dbstruct)
      (let* ((dbdat (make-dbr:dbdat
		     dbfile: (dbr:dbstruct-dbfile dbstruct)
		     dbh:    (dbr:dbstruct-cachedb  dbstruct)
		     )))
	(dbr:dbstruct-dbdat-set! dbstruct dbdat)
	dbdat)))

;; NOT USED?
(define (dbmod:need-on-disk-db-handle)
    (case (dbfile:cache-method)
      ((none tmp) #t)
      ((cachedb)
       (case (dbfile:sync-method)
	 ((original) #t)
	 ((attach)   #t) ;; we need it to force creation of the on-disk file - FIXME
	 (else
	  (debug:print 0 *default-log-port* "Unknown dbfile:sync-method setting: "
		       (dbfile:sync-method)))))
      (else
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       (sqlite3:set-busy-handler! db handler)
       (if write-access
	   (init-proc db))
       db))))

(define *sync-in-progress* #f)

;; Open the inmem db and the on-disk db
;; populate the inmem db with data
;;
;; Updates fields in dbstruct
;; Returns dbstruct
;;
;; * This routine creates the db if not found
;; * Probably can get rid of the dbstruct-in
;; 








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       (sqlite3:set-busy-handler! db handler)
       (if write-access
	   (init-proc db))
       db))))

(define *sync-in-progress* #f)

;; Open the cachedb db and the on-disk db
;; populate the cachedb db with data
;;
;; Updates fields in dbstruct
;; Returns dbstruct
;;
;; * This routine creates the db if not found
;; * Probably can get rid of the dbstruct-in
;;
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	 (tmpdir       (conc "/tmp/"(current-user-name)))
	 (tmpdb        (let* ((fname (conc tmpdir"/" (string-translate areapath "/" ".") ;; "-"(current-process-id)
					   "-"dbfname)))
			 (if (not (file-exists? tmpdir))(create-directory tmpdir))
			 ;; check if tmpdb already exists, either delete it or
			 ;; add something to the name
			 fname))
	 (inmem        (dbmod:open-inmem-db init-proc
					    ;; (if (eq? (dbfile:cache-method) 'inmem)
					    ;; 	#f
					    tmpdb
					    ;; )
					    ))
	 (write-access (file-write-access? dbpath))
	 (db           (dbmod:safely-open-db dbfullname init-proc write-access))
	 (tables       (db:sync-all-tables-list keys)))
    (if (not (and (sqlite3:database? inmem)
		  (sqlite3:database? db)))
	(begin
	  (debug:print 0 *default-log-port* "ERROR: Failed to properly open "dbfname-in", exiting immediately.")
	  (exit)))    ;; (assert (sqlite3:database? inmem) "FATAL: open-dbmoddb: inmem is not a db")
    ;; (assert (sqlite3:database? db) "FATAL:  open-dbmoddb: db is not a db")
    (dbr:dbstruct-inmem-set!     dbstruct inmem)
    (dbr:dbstruct-ondiskdb-set!  dbstruct db)
    (dbr:dbstruct-dbfile-set!    dbstruct dbfullname)
    (dbr:dbstruct-dbtmpname-set! dbstruct tmpdb)
    (dbr:dbstruct-dbfname-set!   dbstruct dbfname)
    (dbr:dbstruct-sync-proc-set! dbstruct
				 (lambda (last-update)
				   (if *sync-in-progress*
				       (debug:print 3 *default-log-port* "WARNING: overlapping calls to sync to disk")
				       (let* ((sync-cmd (conc "megatest -db2db -from "tmpdb" -to "dbfullname"&"))
					      (synclock-file (conc dbfullname".sync-lock")))
					 ;; (mutex-lock! *db-with-db-mutex*) ;; this mutex is used when overloaded or during a query that modifies the db
					 ;; (if (eq? (dbfile:cache-method) 'inmem)
					 ;;     (dbmod:sync-gasket tables last-update inmem db
					 ;; 			dbfullname syncdir keys)
					 (if (< (file-modification-time tmpdb)
						(file-modification-time dbfullname))
					     (debug:print 0 *default-log-port* "Skipping sync, "tmpdb" older than "dbfullname)
					     (if (file-exists? synclock-file)
						 (debug:print 0 *default-log-port* "Skipping sync, lockfile "synclock-file" found.")
						 (thread-start! (make-thread
								 (lambda ()
								   (set! *sync-in-progress* #t)
								   (debug:print-info "Running "sync-cmd)
								   (system sync-cmd)
								   ;; (mutex-unlock! *db-with-db-mutex*)
								   ;; (thread-sleep! 0.5) ;; ensure at least 1/2 second down time between sync calls
								   (set! *sync-in-progress* #f))))))
					 ))))
    ;; (dbmod:sync-tables tables #f db inmem)
    ;; (if db
    (dbmod:sync-gasket tables #f inmem db dbfullname 'fromdest keys) ;; ) ;; load into inmem
    (dbr:dbstruct-last-update-set! dbstruct (current-seconds)) ;; should this be offset back in time by one second?
    dbstruct))

;;    (if (eq? syncdir 'todisk) ;; sync to disk normally, sync from in dashboard
;;        (dbmod:sync-tables tables last-update inmem db)
;;        (dbmod:sync-tables tables last-update db inmem))))
;;
;; direction: 'fromdest 'todest
;;
(define (dbmod:sync-gasket tables last-update inmem dbh dbfname direction keys)
  (assert (sqlite3:database? inmem) "FATAL: sync-gasket: inmem is not a db")
  (assert (sqlite3:database? inmem) "FATAL: sync-gasket: dbh is not a db")
  (debug:print-info 0 *default-log-port* "dbmod:sync-gasket called with sync-method="(dbfile:sync-method))
  (case (dbfile:sync-method)
    ((none) #f)
    ((attach)
     (dbmod:attach-sync tables inmem dbfname direction))
    ((newsync)
     (dbmod:new-sync tables inmem dbh dbfname direction))
    (else
     (case direction
       ((todisk) ;; i.e. from the cache db to the mtrah db
	(dbmod:sync-tables tables last-update keys inmem dbh))
       (else
	(dbmod:sync-tables tables last-update keys dbh inmem))))))

(define (dbmod:close-db dbstruct)
  ;; do final sync to disk file
  ;; (do-sync ...)
  (sqlite3:finalize! (dbr:dbstruct-ondiskdb dbstruct)))

;;======================================================================








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	 (tmpdir       (conc "/tmp/"(current-user-name)))
	 (tmpdb        (let* ((fname (conc tmpdir"/" (string-translate areapath "/" ".") ;; "-"(current-process-id)
					   "-"dbfname)))
			 (if (not (file-exists? tmpdir))(create-directory tmpdir))
			 ;; check if tmpdb already exists, either delete it or
			 ;; add something to the name
			 fname))
	 (cachedb        (dbmod:open-cachedb-db init-proc
					    ;; (if (eq? (dbfile:cache-method) 'cachedb)
					    ;; 	#f
					    tmpdb
					    ;; )
					    ))
	 (write-access (file-write-access? dbpath))
	 (db           (dbmod:safely-open-db dbfullname init-proc write-access))
	 (tables       (db:sync-all-tables-list keys)))
    (if (not (and (sqlite3:database? cachedb)
		  (sqlite3:database? db)))
	(begin
	  (debug:print 0 *default-log-port* "ERROR: Failed to properly open "dbfname-in", exiting immediately.")
	  (exit)))    ;; (assert (sqlite3:database? cachedb) "FATAL: open-dbmoddb: cachedb is not a db")
    ;; (assert (sqlite3:database? db) "FATAL:  open-dbmoddb: db is not a db")
    (dbr:dbstruct-cachedb-set!     dbstruct cachedb)
    (dbr:dbstruct-ondiskdb-set!  dbstruct db)
    (dbr:dbstruct-dbfile-set!    dbstruct dbfullname)
    (dbr:dbstruct-dbtmpname-set! dbstruct tmpdb)
    (dbr:dbstruct-dbfname-set!   dbstruct dbfname)
    (dbr:dbstruct-sync-proc-set! dbstruct
				 (lambda (last-update)
				   (if *sync-in-progress*
				       (debug:print 3 *default-log-port* "WARNING: overlapping calls to sync to disk")
				       (let* ((sync-cmd (conc "megatest -db2db -from "tmpdb" -to "dbfullname"&"))
					      (synclock-file (conc dbfullname".sync-lock")))
					 ;; (mutex-lock! *db-with-db-mutex*) ;; this mutex is used when overloaded or during a query that modifies the db
					 ;; (if (eq? (dbfile:cache-method) 'cachedb)
					 ;;     (dbmod:sync-gasket tables last-update cachedb db
					 ;; 			dbfullname syncdir keys)
					 (if (< (file-modification-time tmpdb)
						(file-modification-time dbfullname))
					     (debug:print 0 *default-log-port* "Skipping sync, "tmpdb" older than "dbfullname)
					     (if (file-exists? synclock-file)
						 (debug:print 0 *default-log-port* "Skipping sync, lockfile "synclock-file" found.")
						 (thread-start! (make-thread
								 (lambda ()
								   (set! *sync-in-progress* #t)
								   (debug:print-info "Running "sync-cmd)
								   (system sync-cmd)
								   ;; (mutex-unlock! *db-with-db-mutex*)
								   ;; (thread-sleep! 0.5) ;; ensure at least 1/2 second down time between sync calls
								   (set! *sync-in-progress* #f))))))
					 ))))
    ;; (dbmod:sync-tables tables #f db cachedb)
    ;; (if db
    (dbmod:sync-gasket tables #f cachedb db dbfullname 'fromdest keys) ;; ) ;; load into cachedb
    (dbr:dbstruct-last-update-set! dbstruct (current-seconds)) ;; should this be offset back in time by one second?
    dbstruct))

;;    (if (eq? syncdir 'todisk) ;; sync to disk normally, sync from in dashboard
;;        (dbmod:sync-tables tables last-update cachedb db)
;;        (dbmod:sync-tables tables last-update db cachedb))))
;;
;; direction: 'fromdest 'todest
;;
(define (dbmod:sync-gasket tables last-update cachedb dbh dbfname direction keys)
  (assert (sqlite3:database? cachedb) "FATAL: sync-gasket: cachedb is not a db")
  (assert (sqlite3:database? cachedb) "FATAL: sync-gasket: dbh is not a db")
  (debug:print-info 0 *default-log-port* "dbmod:sync-gasket called with sync-method="(dbfile:sync-method))
  (case (dbfile:sync-method)
    ((none) #f)
    ((attach)
     (dbmod:attach-sync tables cachedb dbfname direction))
    ((newsync)
     (dbmod:new-sync tables cachedb dbh dbfname direction))
    (else
     (case direction
       ((todisk) ;; i.e. from the cache db to the mtrah db
	(dbmod:sync-tables tables last-update keys cachedb dbh))
       (else
	(dbmod:sync-tables tables last-update keys dbh cachedb))))))

(define (dbmod:close-db dbstruct)
  ;; do final sync to disk file
  ;; (do-sync ...)
  (sqlite3:finalize! (dbr:dbstruct-ondiskdb dbstruct)))

;;======================================================================
︙︙

Modified tcp-transportmod.scm from [8dca985e36] to [1f7b58bd4c].

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	      (debug:print 0 *default-log-port* "Exiting immediately")
	      (cleanup)
	      (exit)))

	(let* ((last-update (dbr:dbstruct-last-update dbstruct))
	       (curr-secs   (current-seconds)))
	  (if (and (eq? (tt-state ttdat) 'running)
		   (> (- curr-secs last-update) 3)) ;; every 3-4 seconds update the db? maybe this should be refresh the inmem?
	      (begin
		(set! (file-modification-time (tt-servinf-file ttdat)) (current-seconds))
		((dbr:dbstruct-sync-proc dbstruct) last-update)
		(dbr:dbstruct-last-update-set! dbstruct curr-secs))))
	  
	(if (< (- (current-seconds) (tt-last-access ttdat)) (tt-server-timeout-param))
	    (begin








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	      (debug:print 0 *default-log-port* "Exiting immediately")
	      (cleanup)
	      (exit)))

	(let* ((last-update (dbr:dbstruct-last-update dbstruct))
	       (curr-secs   (current-seconds)))
	  (if (and (eq? (tt-state ttdat) 'running)
		   (> (- curr-secs last-update) 3)) ;; every 3-4 seconds update the db?
	      (begin
		(set! (file-modification-time (tt-servinf-file ttdat)) (current-seconds))
		((dbr:dbstruct-sync-proc dbstruct) last-update)
		(dbr:dbstruct-last-update-set! dbstruct curr-secs))))
	  
	(if (< (- (current-seconds) (tt-last-access ttdat)) (tt-server-timeout-param))
	    (begin
︙︙

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;;======================================================================
;; set up transport, db cache and sync methods
;;
;; sync-method:        'original, 'attach or 'none
;; cache-method:       'tmp, 'inmem or 'none
;; rmt:transport-mode: 'http, 'tcp, 'nfs
;;
;; NOTE: NOT ALL COMBINATIONS WORK
;;
;;======================================================================

;; uncomment this block to test without tcp or inmem
;; (dbfile:sync-method 'none)
;; (dbfile:cache-method 'none)
;; (rmt:transport-mode 'nfs)

;; uncomment this block to test with tcp and inmem
(dbfile:sync-method 'original) ;; attach)
(dbfile:cache-method 'tmp)
(rmt:transport-mode 'tcp)







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;;======================================================================
;; set up transport, db cache and sync methods
;;
;; sync-method:        'original, 'attach or 'none
;; cache-method:       'tmp 'none
;; rmt:transport-mode: 'http, 'tcp, 'nfs
;;
;; NOTE: NOT ALL COMBINATIONS WORK
;;
;;======================================================================

;; uncomment this block to test without tcp
;; (dbfile:sync-method 'none)
;; (dbfile:cache-method 'none)
;; (rmt:transport-mode 'nfs)

;; uncomment this block to test with tcp
(dbfile:sync-method 'original) ;; attach) ;; original
(dbfile:cache-method 'tmp)
(rmt:transport-mode 'tcp)

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