rpm/db/test/rep063.tcl

363 lines
11 KiB
Tcl

# See the file LICENSE for redistribution information.
#
# Copyright (c) 2002,2007 Oracle. All rights reserved.
#
# $Id: rep063.tcl,v 1.12 2007/05/17 18:17:21 bostic Exp $
#
# TEST rep063
# TEST Replication election test with simulated different versions
# TEST for each site. This tests that old sites with real priority
# TEST trump ELECTABLE sites with zero priority even with greater LSNs.
# TEST There is a special case in the code for testing that if the
# TEST priority is <= 10, we simulate mixed versions for elections.
# TEST
# TEST Run a rep_test in a replicated master environment and close;
# TEST hold an election among a group of clients to make sure they select
# TEST the master with varying LSNs and priorities.
#
proc rep063 { method args } {
source ./include.tcl
if { $is_windows9x_test == 1 } {
puts "Skipping replication test on Win 9x platform."
return
}
set tnum "063"
# Skip for all methods except btree.
if { $checking_valid_methods } {
set test_methods { btree }
return $test_methods
}
if { [is_btree $method] == 0 } {
puts "Rep$tnum: Skipping for method $method."
return
}
set nclients 5
set logsets [create_logsets [expr $nclients + 1]]
# Run the body of the test with and without recovery.
set recopts { "" "-recover" }
foreach r $recopts {
foreach l $logsets {
set logindex [lsearch -exact $l "in-memory"]
if { $r == "-recover" && $logindex != -1 } {
puts "Rep$tnum: Skipping\
for in-memory logs with -recover."
continue
}
puts "Rep$tnum ($method $r): \
Replication elections with varying versions."
puts "Rep$tnum: Master logs are [lindex $l 0]"
for { set i 0 } { $i < $nclients } { incr i } {
puts "Rep$tnum: Client $i logs are\
[lindex $l [expr $i + 1]]"
}
rep063_sub $method $nclients $tnum $l $r $args
}
}
}
proc rep063_sub { method nclients tnum logset recargs largs } {
source ./include.tcl
global electable_pri
global rep_verbose
set verbargs ""
if { $rep_verbose == 1 } {
set verbargs " -verbose {rep on} "
}
set niter 80
env_cleanup $testdir
set qdir $testdir/MSGQUEUEDIR
replsetup $qdir
set masterdir $testdir/MASTERDIR
file mkdir $masterdir
set m_logtype [lindex $logset 0]
set m_logargs [adjust_logargs $m_logtype]
set m_txnargs [adjust_txnargs $m_logtype]
for { set i 0 } { $i < $nclients } { incr i } {
set clientdir($i) $testdir/CLIENTDIR.$i
file mkdir $clientdir($i)
set c_logtype($i) [lindex $logset [expr $i + 1]]
set c_logargs($i) [adjust_logargs $c_logtype($i)]
set c_txnargs($i) [adjust_txnargs $c_logtype($i)]
}
# Open a master.
set envlist {}
repladd 1
set env_cmd(M) "berkdb_env_noerr -create -log_max 1000000 \
-event rep_event \
-home $masterdir $m_txnargs $m_logargs -rep_master $verbargs \
-errpfx MASTER -rep_transport \[list 1 replsend\]"
set masterenv [eval $env_cmd(M) $recargs]
error_check_good master_env [is_valid_env $masterenv] TRUE
lappend envlist "$masterenv 1"
# Open the clients.
for { set i 0 } { $i < $nclients } { incr i } {
set envid [expr $i + 2]
repladd $envid
set env_cmd($i) "berkdb_env_noerr -create -home $clientdir($i) \
-event rep_event \
$c_txnargs($i) $c_logargs($i) -rep_client \
-rep_transport \[list $envid replsend\]"
set clientenv($i) [eval $env_cmd($i) $recargs]
error_check_good \
client_env($i) [is_valid_env $clientenv($i)] TRUE
lappend envlist "$clientenv($i) $envid"
}
# Bring the clients online by processing the startup messages.
process_msgs $envlist
# Run a modified test001 in the master.
puts "\tRep$tnum.a: Running rep_test in replicated env."
eval rep_test $method $masterenv NULL $niter 0 0 0 0 $largs
process_msgs $envlist
#
# We remove some client envs and run rep_test so that we can
# force some client LSNs to be further ahead/behind than others.
# When we're done, the LSNs look like this:
#
# Client0: ......................
# Client1: ...........
# Client2: ...........
# Client3: ......................
# Client4: .................................
#
# Remove client 1 and 2 from list to process, this guarantees
# clients 0, 3 and 4 are ahead in LSN. We use each of these
# in different parts of the test so guarantee bigger LSNs.
#
set orig_env $envlist
set envlist [lreplace $envlist 3 3]
set envlist [lreplace $envlist 2 2]
eval rep_test $method $masterenv NULL $niter 0 0 0 0 $largs
process_msgs $envlist
#
# Remove client 3 so that client 4 has the biggest LSN of all.
#
set eend [llength $envlist]
set cl3_i [expr $eend - 2]
set envlist [lreplace $envlist $cl3_i $cl3_i]
eval rep_test $method $masterenv NULL $niter 0 0 0 0 $largs
process_msgs $envlist
#
# Put all removed clients back in.
#
set envlist $orig_env
error_check_good masterenv_close [$masterenv close] 0
set envlist [lreplace $envlist 0 0]
for { set i 0 } { $i < $nclients } { incr i } {
replclear [expr $i + 2]
#
# This test doesn't use the testing hooks, so
# initialize err_cmd and crash appropriately.
#
set err_cmd($i) "none"
set crash($i) 0
#
# Initialize the array pri. We'll set it to
# appropriate values when the winner is determined.
#
set pri($i) 0
#
if { $rep_verbose == 1 } {
error_check_good pfx [$clientenv($i) errpfx CLIENT$i] 0
$clientenv($i) verbose rep on
set env_cmd($i) [concat $env_cmd($i) \
"-errpfx CLIENT$i $verbargs "]
}
}
#
# Remove clients 3 and 4 from the envlist. We'll save those for
# later.
#
set cl4 [lindex $envlist 4]
set envlist [lreplace $envlist 4 4]
set cl3 [lindex $envlist 3]
set envlist [lreplace $envlist 3 3]
set m "Rep$tnum.b"
#
# Client 0 has the biggest LSN of clients 0, 1, 2.
# However, 'setpriority' will set the priority of client 1
# to simulate client 1 being an "older version" client.
# Client 1 should win even though its LSN is smaller.
# This tests one "older" client and the rest "newer".
#
puts "\t$m: Test old client trumps new clients with bigger LSN."
set orig_ncl $nclients
set nclients 3
set nsites $nclients
set nvotes $nclients
set winner 1
set elector 2
setpriority pri $nclients $winner 0 1
run_election env_cmd envlist err_cmd pri crash\
$qdir $m $elector $nsites $nvotes $nclients $winner
#
# In all of the checks of the Election Priority stat field,
# we use clientenv(2). The reason is that we never expect
# client 2 to be the winner. The env handles of client 0 and 1
# are getting closed and reopened as a master/client in
# the election and the old recorded handles are invalid.
# This one is known to be valid throughout the entire test.
#
error_check_bad old_pri [stat_field $clientenv(2) rep_stat \
"Election priority"] 0
#
# When we finish the election, all clients are at the same LSN.
# Call this proc to make the winner have a larger LSN than the
# other 2 remaining clients, and reopen the winner as a client.
#
rep063_movelsn_reopen $method envlist $env_cmd($winner) $winner $largs
set m "Rep$tnum.c"
puts "\t$m: Test old client with zero priority new client."
#
# Client 1 now has a bigger LSN, so make client 0 the old client
# and client 1 a real 0 priority new client.
#
set winner 0
setpriority pri $nclients $winner 0 1
set pri(1) 0
run_election env_cmd envlist err_cmd pri crash\
$qdir $m $elector $nsites $nvotes $nclients $winner
error_check_bad old_pri [stat_field $clientenv(2) rep_stat \
"Election priority"] 0
rep063_movelsn_reopen $method envlist $env_cmd($winner) $winner $largs
set m "Rep$tnum.d"
puts "\t$m: Test multiple old clients with new client."
#
# Client 0 is now has a bigger LSN, so make client 1 winner.
# We are setting client 2's priority to something bigger so that
# we simulate having 2 "older version" clients (clients 1 and 2)
# and one new client (client 0). This tests that the right client
# among the older versions gets correctly elected even though there
# is a bigger LSN "new" client participating.
#
set winner 1
setpriority pri $nclients $winner 0 1
set pri(2) [expr $pri(1) / 2]
run_election env_cmd envlist err_cmd pri crash\
$qdir $m $elector $nsites $nvotes $nclients $winner
error_check_bad old_pri [stat_field $clientenv(2) rep_stat \
"Election priority"] 0
rep063_movelsn_reopen $method envlist $env_cmd($winner) $winner $largs
set m "Rep$tnum.e"
puts "\t$m: Test new clients, client 1 not electable."
#
# Client 1 now has a bigger LSN, so make it unelectable. Add in
# old client 3 since that should be the biggest LSN of all these.
# Set all other priorities to electable_pri to make them all equal (and
# all "new" clients). We know client 3 should win because we
# set its LSN much farther ahead in the beginning.
#
set winner 3
replclear [expr $winner + 2]
set nclients 4
set nsites $nclients
set nvotes $nclients
set pri(0) $electable_pri
set pri(1) 0
set pri(2) $electable_pri
set pri(3) $electable_pri
replclear [lindex $cl3 1]
lappend envlist $cl3
#
# Winner should be zero priority.
#
run_election env_cmd envlist err_cmd pri crash\
$qdir $m $elector $nsites $nvotes $nclients $winner
error_check_good elect_pri [stat_field $clientenv(2) rep_stat \
"Election priority"] 0
rep063_movelsn_reopen $method envlist $env_cmd($winner) $winner $largs
#
# Now add in Client 4, the site with the biggest LSN of all.
# Test with all being electable clients.
#
set m "Rep$tnum.f"
puts "\t$m: Test all new electable clients."
set winner 4
set nclients 5
set nsites $nclients
set nvotes $nclients
set pri(0) $electable_pri
set pri(1) $electable_pri
set pri(2) $electable_pri
set pri(3) $electable_pri
set pri(4) $electable_pri
replclear [expr $winner + 2]
lappend envlist $cl4
#
# Client 4 has biggest LSN and should now win, but winner should
# be zero priority.
#
run_election env_cmd envlist err_cmd pri crash\
$qdir $m $elector $nsites $nvotes $nclients $winner
error_check_good elect_pri [stat_field $clientenv(2) rep_stat \
"Election priority"] 0
foreach pair $envlist {
set cenv [lindex $pair 0]
error_check_good cenv_close [$cenv close] 0
}
replclose $testdir/MSGQUEUEDIR
}
#
# Move the LSN ahead on the newly elected master, while not sending
# those messages to the other clients. Then close the env and
# reopen it as a client. Use upvar so that the envlist is
# modified when we return and can get messages.
#
proc rep063_movelsn_reopen { method envlist env_cmd eindex largs } {
upvar $envlist elist
set clrlist { }
set i 0
foreach e $elist {
#
# If we find the master env entry, get its env handle.
# If not, then get the id so that we can replclear it later.
#
if { $i == $eindex } {
set masterenv [lindex $e 0]
} else {
lappend clrlist [lindex $e 1]
}
incr i
}
#
# Move this env's LSN ahead.
#
set niter 10
eval rep_test $method $masterenv NULL $niter 0 0 0 0 $largs
foreach cl $clrlist {
replclear $cl
}
#
# Now close this env and reopen it as a client.
#
error_check_good newmaster_close [$masterenv close] 0
set newclenv [eval $env_cmd]
error_check_good cl [is_valid_env $newclenv] TRUE
set newenv "$newclenv [expr $eindex + 2]"
set elist [lreplace $elist $eindex $eindex $newenv]
process_msgs $elist
}