test042.tcl
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上传日期:2007-04-14
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- # See the file LICENSE for redistribution information.
- #
- # Copyright (c) 1996, 1997, 1998, 1999, 2000
- # Sleepycat Software. All rights reserved.
- #
- # $Id: test042.tcl,v 11.24 2000/08/25 14:21:56 sue Exp $
- #
- # DB Test 42 {access method}
- #
- # Multiprocess DB test; verify that locking is working for the concurrent
- # access method product.
- #
- # Use the first "nentries" words from the dictionary. Insert each with self
- # as key and a fixed, medium length data string. Then fire off multiple
- # processes that bang on the database. Each one should try to read and write
- # random keys. When they rewrite, they'll append their pid to the data string
- # (sometimes doing a rewrite sometimes doing a partial put). Some will use
- # cursors to traverse through a few keys before finding one to write.
- set datastr abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz
- proc test042 { method {nentries 1000} args } {
- global datastr
- source ./include.tcl
- #
- # If we are using an env, then skip this test. It needs its own.
- set eindex [lsearch -exact $args "-env"]
- if { $eindex != -1 } {
- incr eindex
- set env [lindex $args $eindex]
- puts "Test042 skipping for env $env"
- return
- }
- set args [convert_args $method $args]
- set omethod [convert_method $method]
- puts "Test042: CDB Test $method $nentries"
- # Set initial parameters
- set do_exit 0
- set iter 10000
- set procs 5
- # Process arguments
- set oargs ""
- for { set i 0 } { $i < [llength $args] } {incr i} {
- switch -regexp -- [lindex $args $i] {
- -dir { incr i; set testdir [lindex $args $i] }
- -iter { incr i; set iter [lindex $args $i] }
- -procs { incr i; set procs [lindex $args $i] }
- -exit { set do_exit 1 }
- default { append oargs " " [lindex $args $i] }
- }
- }
- # Create the database and open the dictionary
- set testfile test042.db
- set t1 $testdir/t1
- set t2 $testdir/t2
- set t3 $testdir/t3
- env_cleanup $testdir
- set env [berkdb env -create -cdb -home $testdir]
- error_check_good dbenv [is_valid_widget $env env] TRUE
- set db [eval {berkdb_open -env $env -create -truncate
- -mode 0644 $omethod} $oargs {$testfile}]
- error_check_good dbopen [is_valid_widget $db db] TRUE
- set did [open $dict]
- set pflags ""
- set gflags ""
- set txn ""
- set count 0
- # Here is the loop where we put each key/data pair
- puts "tTest042.a: put/get loop"
- while { [gets $did str] != -1 && $count < $nentries } {
- if { [is_record_based $method] == 1 } {
- set key [expr $count + 1]
- } else {
- set key $str
- }
- set ret [eval {$db put}
- $txn $pflags {$key [chop_data $method $datastr]}]
- error_check_good put:$db $ret 0
- incr count
- }
- close $did
- error_check_good close:$db [$db close] 0
- # Database is created, now set up environment
- # Remove old mpools and Open/create the lock and mpool regions
- error_check_good env:close:$env [$env close] 0
- set ret [berkdb envremove -home $testdir]
- error_check_good env_remove $ret 0
- set env [berkdb env -create -cdb -home $testdir]
- error_check_good dbenv [is_valid_widget $env env] TRUE
- if { $do_exit == 1 } {
- return
- }
- # Now spawn off processes
- berkdb debug_check
- puts "tTest042.b: forking off $procs children"
- set pidlist {}
- for { set i 0 } {$i < $procs} {incr i} {
- puts "exec $tclsh_path $test_path/wrap.tcl
- mdbscript.tcl $testdir/test042.$i.log
- $method $testdir $testfile $nentries $iter $i $procs &"
- set p [exec $tclsh_path $test_path/wrap.tcl
- mdbscript.tcl $testdir/test042.$i.log $method
- $testdir $testfile $nentries $iter $i $procs &]
- lappend pidlist $p
- }
- puts "Test042: $procs independent processes now running"
- watch_procs
- # Check for test failure
- set e [eval findfail [glob $testdir/test042.*.log]]
- error_check_good "FAIL: error message(s) in log files" $e 0
- # Test is done, blow away lock and mpool region
- reset_env $env
- }
- # If we are renumbering, then each time we delete an item, the number of
- # items in the file is temporarily decreased, so the highest record numbers
- # do not exist. To make sure this doesn't happen, we never generate the
- # highest few record numbers as keys.
- #
- # For record-based methods, record numbers begin at 1, while for other keys,
- # we begin at 0 to index into an array.
- proc rand_key { method nkeys renum procs} {
- if { $renum == 1 } {
- return [berkdb random_int 1 [expr $nkeys - $procs]]
- } elseif { [is_record_based $method] == 1 } {
- return [berkdb random_int 1 $nkeys]
- } else {
- return [berkdb random_int 0 [expr $nkeys - 1]]
- }
- }