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Update alter_active_table.t and fix NibbleIterator to handle a growing table.

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This commit is contained in:
Daniel Nichter
2012-03-29 15:23:38 -06:00
parent 2dfb3318c2
commit fcc3a44e23
10 changed files with 650 additions and 583 deletions
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29
bin/pt-online-schema-change
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@@ -4451,9 +4451,6 @@ sub _get_bounds {
$self->{no_more_boundaries} = 1; $self->{no_more_boundaries} = 1;
} }
$self->{last_upper} = $dbh->selectrow_arrayref($self->{last_ub_sql});
PTDEBUG && _d('Last upper boundary:', Dumper($self->{last_upper}));
return; return;
} }
@@ -4509,19 +4506,21 @@ sub _next_boundaries {
my $boundary = $self->{ub_sth}->fetchall_arrayref(); my $boundary = $self->{ub_sth}->fetchall_arrayref();
PTDEBUG && _d('Next boundary:', Dumper($boundary)); PTDEBUG && _d('Next boundary:', Dumper($boundary));
if ( $boundary && @$boundary ) { if ( $boundary && @$boundary ) {
$self->{upper} = $boundary->[0]; # this nibble $self->{upper} = $boundary->[0];
if ( $boundary->[1] ) { if ( $boundary->[1] ) {
$self->{next_lower} = $boundary->[1]; # next nibble $self->{next_lower} = $boundary->[1];
} }
else { else {
PTDEBUG && _d('End of table boundary:', Dumper($boundary->[0]));
$self->{no_more_boundaries} = 1; # for next call $self->{no_more_boundaries} = 1; # for next call
PTDEBUG && _d('Last upper boundary:', Dumper($boundary->[0]));
} }
} }
else { else {
$self->{no_more_boundaries} = 1; # for next call my $dbh = $self->{Cxn}->dbh();
$self->{upper} = $self->{last_upper}; $self->{upper} = $dbh->selectrow_arrayref($self->{last_ub_sql});
PTDEBUG && _d('Last upper boundary:', Dumper($self->{upper})); PTDEBUG && _d('Last upper boundary:', Dumper($self->{upper}));
$self->{no_more_boundaries} = 1; # for next call
} }
$self->{ub_sth}->finish(); $self->{ub_sth}->finish();
@@ -5592,7 +5591,12 @@ sub main {
. ($nibble_iter->nibble_index() || '?') . ($nibble_iter->nibble_index() || '?')
. " index, but MySQL EXPLAIN reports that " . " index, but MySQL EXPLAIN reports that "
. ($expl->{key} ? "the $expl->{key}" : "no") . ($expl->{key} ? "the $expl->{key}" : "no")
. " index will be used.\n"; . " index will be used for "
. $sth->{upper_boundary}->{Statement}
. " with values "
. join(", ", map { defined $_ ? $_ : "NULL" }
(@{$boundary->{lower}}, $nibble_iter->chunk_size()))
. "\n";
die $msg; die $msg;
} }
@@ -5635,7 +5639,12 @@ sub main {
. ($nibble_iter->nibble_index() || '?') . ($nibble_iter->nibble_index() || '?')
. " index, but MySQL EXPLAIN reports that " . " index, but MySQL EXPLAIN reports that "
. ($expl->{key} ? "the $expl->{key}" : "no") . ($expl->{key} ? "the $expl->{key}" : "no")
. " index will be used.\n"; . " index will be used for "
. $sth->{explain_nibble}->{Statement}
. " with values "
. join(", ", map { defined $_ ? $_ : "NULL" }
(@{$boundary->{lower}}, @{$boundary->{upper}}))
. "\n";
die $msg; die $msg;
} }

60
lib/NibbleIterator.pm
View File

@@ -639,11 +639,6 @@ sub _get_bounds {
$self->{no_more_boundaries} = 1; $self->{no_more_boundaries} = 1;
} }
# Get the real last upper boundary, i.e. the last row of the table
# at this moment. If rows are inserted after, we won't see them.
$self->{last_upper} = $dbh->selectrow_arrayref($self->{last_ub_sql});
PTDEBUG && _d('Last upper boundary:', Dumper($self->{last_upper}));
return; return;
} }
@@ -699,25 +694,70 @@ sub _next_boundaries {
} }
} }
# Two boundaries are being fetched: the upper boundary for this nibble,
# i.e. the nibble the caller is trying to exec, and the next_lower boundary
# for the next nibble that the caller will try to exec. For example,
# if chunking the alphabet, a-z, with chunk size 3, the first call will
# fetch:
#
# a <- lower
# b
# c <- upper ($boundary->[0])
# d <- next_lower ($boundary->[1])
#
# Then the second call will fetch:
#
# d <- lower
# e
# f <- upper
# g <- next_lower
#
# Why fetch both upper and next_lower? We wanted to keep nibbling simple,
# i.e. one nibble statment, not one for the first nibble, one for "middle"
# nibbles, and another for the end (this is how older code worked). So the
# nibble statement is inclusive, but this requires both boundaries for
# reasons explained in a comment above my $ub_sql in new().
PTDEBUG && _d($self->{ub_sth}->{Statement}, 'params:', PTDEBUG && _d($self->{ub_sth}->{Statement}, 'params:',
join(', ', @{$self->{lower}}), $self->{limit}); join(', ', @{$self->{lower}}), $self->{limit});
$self->{ub_sth}->execute(@{$self->{lower}}, $self->{limit}); $self->{ub_sth}->execute(@{$self->{lower}}, $self->{limit});
my $boundary = $self->{ub_sth}->fetchall_arrayref(); my $boundary = $self->{ub_sth}->fetchall_arrayref();
PTDEBUG && _d('Next boundary:', Dumper($boundary)); PTDEBUG && _d('Next boundary:', Dumper($boundary));
if ( $boundary && @$boundary ) { if ( $boundary && @$boundary ) {
$self->{upper} = $boundary->[0]; # this nibble # upper boundary for the current nibble.
$self->{upper} = $boundary->[0];
if ( $boundary->[1] ) { if ( $boundary->[1] ) {
$self->{next_lower} = $boundary->[1]; # next nibble # next_lower boundary for the next nibble (will become the lower
# boundary when that nibble becomes the current nibble).
$self->{next_lower} = $boundary->[1];
} }
else { else {
# There's no next_lower boundary, so the upper boundary of
# the current nibble is the end of the table. For example,
# if chunking a-z, then the upper boundary of the current
# nibble ($boundary->[0]) is z.
PTDEBUG && _d('End of table boundary:', Dumper($boundary->[0]));
$self->{no_more_boundaries} = 1; # for next call $self->{no_more_boundaries} = 1; # for next call
PTDEBUG && _d('Last upper boundary:', Dumper($boundary->[0]));
# OobNibbleIterator needs to know the last upper boundary.
$self->{last_upper} = $boundary->[0];
} }
} }
else { else {
$self->{no_more_boundaries} = 1; # for next call # This code is reached in cases like chunking a-z and the next_lower
$self->{upper} = $self->{last_upper}; # boundary ($boundary->[1]) falls on z. When called again, no upper
# or next_lower is found past z so if($boundary && @$boundary) is false.
# But there's a problem: between the previous call that made next_lower=z
# and this call, rows might have been inserted, so maybe z is no longer
# the end of the table. To handle this, we fetch the end of the table
# once and make the final nibble z-<whatever>.
my $dbh = $self->{Cxn}->dbh();
$self->{upper} = $dbh->selectrow_arrayref($self->{last_ub_sql});
PTDEBUG && _d('Last upper boundary:', Dumper($self->{upper})); PTDEBUG && _d('Last upper boundary:', Dumper($self->{upper}));
$self->{no_more_boundaries} = 1; # for next call
# OobNibbleIterator needs to know the last upper boundary.
$self->{last_upper} = $self->{upper};
} }
$self->{ub_sth}->finish(); $self->{ub_sth}->finish();

2
lib/OobNibbleIterator.pm
View File

@@ -58,7 +58,7 @@ sub new {
my $q = $self->{Quoter}; my $q = $self->{Quoter};
my $o = $self->{OptionParser}; my $o = $self->{OptionParser};
my $where = $o->get('where'); my $where = $o->has('where') ? $o->get('where') : undef;
# If it's not a single nibble table, init our special statements. # If it's not a single nibble table, init our special statements.
if ( !$self->one_nibble() ) { if ( !$self->one_nibble() ) {

11
t/lib/OobNibbleIterator.t
View File

@@ -191,7 +191,6 @@ $ni = make_nibble_iter(
argv => [qw(--databases test --chunk-size 8)], argv => [qw(--databases test --chunk-size 8)],
); );
$dbh->do("delete from test.t where c='a' or c='z'"); $dbh->do("delete from test.t where c='a' or c='z'");
@rows = (); @rows = ();
@@ -204,8 +203,6 @@ is_deeply(
'a-z nibble 1 with oob' 'a-z nibble 1 with oob'
) or print Dumper(\@rows); ) or print Dumper(\@rows);
$dbh->do("insert into test.t values ('a'), ('z')");
@rows = (); @rows = ();
for (1..8) { for (1..8) {
push @rows, $ni->next(); push @rows, $ni->next();
@@ -226,6 +223,13 @@ is_deeply(
'a-z nibble 3 with oob' 'a-z nibble 3 with oob'
) or print Dumper(\@rows); ) or print Dumper(\@rows);
# NibbleIterator is done (b-y), now insert a row on the low end (a),
# and one on the high end (z), past what NibbleIterator originally
# saw as the first and last boundaries. OobNibbleIterator should kick
# in and see a and z.
$dbh->do("insert into test.t values ('a'), ('z')");
# OobNibbleIterator checks the low end first.
@rows = (); @rows = ();
push @rows, $ni->next(); push @rows, $ni->next();
is_deeply( is_deeply(
@@ -234,6 +238,7 @@ is_deeply(
'a-z nibble 4 lower oob' 'a-z nibble 4 lower oob'
) or print Dumper(\@rows); ) or print Dumper(\@rows);
# Then it checks the high end.
@rows = (); @rows = ();
push @rows, $ni->next(); push @rows, $ni->next();
is_deeply( is_deeply(

94
t/pt-online-schema-change/alter_active_table.t
View File

@@ -13,34 +13,37 @@ use Test::More;
use PerconaTest; use PerconaTest;
use Sandbox; use Sandbox;
require "$trunk/bin/pt-online-schema-change";
use Time::HiRes qw(usleep); use Time::HiRes qw(usleep);
use Data::Dumper; use Data::Dumper;
$Data::Dumper::Indent = 1; $Data::Dumper::Indent = 1;
$Data::Dumper::Sortkeys = 1; $Data::Dumper::Sortkeys = 1;
$Data::Dumper::Quotekeys = 0; $Data::Dumper::Quotekeys = 0;
require "$trunk/bin/pt-online-schema-change";
my $dp = new DSNParser(opts=>$dsn_opts); my $dp = new DSNParser(opts=>$dsn_opts);
my $sb = new Sandbox(basedir => '/tmp', DSNParser => $dp); my $sb = new Sandbox(basedir => '/tmp', DSNParser => $dp);
my $dbh = $sb->get_dbh_for('master'); my $master_dbh = $sb->get_dbh_for('master');
my $slave_dbh = $sb->get_dbh_for('slave1');
if ( !$dbh ) { if ( !$master_dbh ) {
plan skip_all => 'Cannot connect to sandbox master'; plan skip_all => 'Cannot connect to sandbox master';
} }
elsif ( !$slave_dbh ) {
plan skip_all => 'Cannot connect to sandbox slave';
}
else { else {
plan tests => 7; plan tests => 7;
} }
my $output = ""; my $output;
my $cnf = '/tmp/12345/my.sandbox.cnf'; my $master_dsn = "h=127.1,P=12345,u=msandbox,p=msandbox";
my @args = ('-F', $cnf, '--execute'); my $sample = "t/pt-online-schema-change/samples";
my $exit = 0; my $exit;
my $rows; my $rows;
my $query_table_stop = '/tmp/query_table.stop'; my $query_table_stop = "/tmp/query_table.$PID.stop";
my $query_table_output = '/tmp/query_table.output'; my $query_table_output = "/tmp/query_table.$PID.output";
diag(`rm -rf $query_table_stop`);
diag(`rm -rf $query_table_output`);
sub start_query_table { sub start_query_table {
my ($db, $tbl, $pkcol) = @_; my ($db, $tbl, $pkcol) = @_;
@@ -48,8 +51,8 @@ sub start_query_table {
diag(`rm -rf $query_table_stop`); diag(`rm -rf $query_table_stop`);
diag(`echo > $query_table_output`); diag(`echo > $query_table_output`);
my $cmd = "$trunk/t/pt-online-schema-change/samples/query_table.pl"; my $cmd = "$trunk/$sample/query_table.pl";
system("$cmd 127.1 12345 $db $tbl $pkcol >$query_table_output &"); system("$cmd 127.1 12345 $db $tbl $pkcol $query_table_stop >$query_table_output &");
return; return;
} }
@@ -89,7 +92,7 @@ sub check_ids {
$n_deleted++ if $n_deleted; $n_deleted++ if $n_deleted;
$n_inserted++; $n_inserted++;
$rows = $dbh->selectrow_arrayref( $rows = $master_dbh->selectrow_arrayref(
"SELECT COUNT($pkcol) FROM $db.$tbl"); "SELECT COUNT($pkcol) FROM $db.$tbl");
is( is(
$rows->[0], $rows->[0],
@@ -97,7 +100,7 @@ sub check_ids {
"New table row count: 500 original + $n_inserted inserted - $n_deleted deleted" "New table row count: 500 original + $n_inserted inserted - $n_deleted deleted"
) or print Dumper($rows); ) or print Dumper($rows);
$rows = $dbh->selectall_arrayref( $rows = $master_dbh->selectall_arrayref(
"SELECT $pkcol FROM $db.$tbl WHERE $pkcol > 500 AND $pkcol NOT IN ($ids->{inserted})"); "SELECT $pkcol FROM $db.$tbl WHERE $pkcol > 500 AND $pkcol NOT IN ($ids->{inserted})");
is_deeply( is_deeply(
$rows, $rows,
@@ -106,7 +109,7 @@ sub check_ids {
) or print Dumper($rows); ) or print Dumper($rows);
if ( $n_deleted ) { if ( $n_deleted ) {
$rows = $dbh->selectall_arrayref( $rows = $master_dbh->selectall_arrayref(
"SELECT $pkcol FROM $db.$tbl WHERE $pkcol IN ($ids->{deleted})"); "SELECT $pkcol FROM $db.$tbl WHERE $pkcol IN ($ids->{deleted})");
is_deeply( is_deeply(
$rows, $rows,
@@ -122,9 +125,9 @@ sub check_ids {
}; };
if ( $n_updated ) { if ( $n_updated ) {
$rows = $dbh->selectall_arrayref( my $sql = "SELECT $pkcol FROM $db.$tbl WHERE $pkcol IN ($ids->{updated}) "
"SELECT $pkcol FROM $db.$tbl WHERE $pkcol IN ($ids->{updated}) " . "AND c NOT LIKE 'updated%'";
. "AND c <> 'updated'"); $rows = $master_dbh->selectall_arrayref($sql);
is_deeply( is_deeply(
$rows, $rows,
[], [],
@@ -144,27 +147,39 @@ sub check_ids {
# ############################################################################# # #############################################################################
# Attempt to alter a table while another process is changing it. # Attempt to alter a table while another process is changing it.
# ############################################################################# # #############################################################################
$sb->load_file('master', "t/pt-online-schema-change/samples/small_table.sql");
$dbh->do('use mkosc');
$dbh->do('truncate table a');
diag(`cp $trunk/t/pt-online-schema-change/samples/a.outfile /tmp/`);
$dbh->do("load data local infile '/tmp/a.outfile' into table mkosc.a");
diag(`rm -rf /tmp/a.outfile`);
start_query_table(qw(mkosc a i)); # Load 500 rows.
$sb->load_file('master', "$sample/basic_no_fks.sql");
PerconaTest::wait_for_table($slave_dbh, "pt_osc.t");
$master_dbh->do("USE pt_osc");
$master_dbh->do("TRUNCATE TABLE t");
diag(`cp $trunk/t/pt-online-schema-change/samples/basic_no_fks.data /tmp`);
$master_dbh->do("LOAD DATA LOCAL INFILE '/tmp/basic_no_fks.data' INTO TABLE pt_osc.t");
diag(`rm -rf /tmp/basic_no_fks.data`);
PerconaTest::wait_for_table($slave_dbh, "pt_osc.t", "id=500");
$master_dbh->do("ANALYZE TABLE pt_osc.t");
# Start inserting, updating, and deleting rows at random.
start_query_table(qw(pt_osc t id));
# While that's ^ happening, alter the table.
$output = output( $output = output(
sub { $exit = pt_online_schema_change::main(@args, sub { $exit = pt_online_schema_change::main(
qw(--chunk-size 100), "$master_dsn,D=pt_osc,t=t",
'D=mkosc,t=a', qw(--alter ENGINE=InnoDB --drop-old-table)) }, qw(--lock-wait-timeout 5),
qw(--print --execute --chunk-size 100 --alter ENGINE=InnoDB)) },
stderr => 1,
); );
# Stop altering the table.
stop_query_table(); stop_query_table();
$rows = $dbh->selectall_hashref('show table status from mkosc', 'name'); $rows = $master_dbh->selectall_hashref('SHOW TABLE STATUS FROM pt_osc', 'name');
is( is(
$rows->{a}->{engine}, $rows->{t}->{engine},
'InnoDB', 'InnoDB',
"New table ENGINE=InnoDB" "New table ENGINE=InnoDB"
); ) or warn Dumper($rows);
is( is(
scalar keys %$rows, scalar keys %$rows,
@@ -178,17 +193,12 @@ is(
"Exit status 0" "Exit status 0"
); );
check_ids('mkosc', 'a', 'i', get_ids()); check_ids(qw(pt_osc t id), get_ids());
# ############################################################################
# Alter an active table with foreign keys.
# ############################################################################
# ############################################################################# # #############################################################################
# Done. # Done.
# ############################################################################# # #############################################################################
diag(`rm -rf $query_table_stop`); diag(`rm -rf $query_table_stop`);
diag(`rm -rf $query_table_output`); #diag(`rm -rf $query_table_output`);
$sb->wipe_clean($dbh); #$sb->wipe_clean($master_dbh);
exit; exit;

20
t/pt-online-schema-change/option_sanity.t
View File

@@ -19,14 +19,21 @@ my $cmd = "$trunk/bin/pt-online-schema-change";
$output = `$cmd`; $output = `$cmd`;
like( like(
$output, $output,
qr/A DSN with a t part must be specified/, qr/DSN must be specified/,
"Must specify a DSN with t part" "Must specify a DSN with t part"
); );
$output = `$cmd h=127.1,P=12345,u=msandbox,p=msandbox`; $output = `$cmd h=127.1,P=12345,t=tbl`;
like( like(
$output, $output,
qr/The DSN must specify a t/, qr/DSN must specify a database \(D\) and a table \(t\)/,
"DSN must specify a D part"
);
$output = `$cmd h=127.1,P=12345,u=msandbox,p=msandbox,D=mysql`;
like(
$output,
qr/DSN must specify a database \(D\) and a table \(t\)/,
"DSN must specify t part" "DSN must specify t part"
); );
@@ -37,13 +44,6 @@ like(
"Only 1 DSN allowed" "Only 1 DSN allowed"
); );
$output = `$cmd h=127.1,P=12345,t=tbl`;
like(
$output,
qr/No database was specified/,
"Either DSN D part or --database required"
);
$output = `$cmd --help`; $output = `$cmd --help`;
like( like(
$output, $output,

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t/pt-online-schema-change/samples/a.outfile
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484 original row 484 2012-03-29
485 original row 485 2012-03-29
486 original row 486 2012-03-29
487 original row 487 2012-03-29
488 original row 488 2012-03-29
489 original row 489 2012-03-29
490 original row 490 2012-03-29
491 original row 491 2012-03-29
492 original row 492 2012-03-29
493 original row 493 2012-03-29
494 original row 494 2012-03-29
495 original row 495 2012-03-29
496 original row 496 2012-03-29
497 original row 497 2012-03-29
498 original row 498 2012-03-29
499 original row 499 2012-03-29
500 original row 500 2012-03-29

4
t/pt-online-schema-change/samples/basic_no_fks.sql
View File

@@ -3,9 +3,9 @@ CREATE DATABASE pt_osc;
USE pt_osc; USE pt_osc;
CREATE TABLE t ( CREATE TABLE t (
id int auto_increment primary key, id int auto_increment primary key,
c char(16), c char(32),
d date, d date,
unique index (c(16)) unique index (c(32))
) ENGINE=MyISAM; ) ENGINE=MyISAM;
INSERT INTO pt_osc.t VALUES INSERT INTO pt_osc.t VALUES
(null, 'a', now()), (null, 'a', now()),

13
t/pt-online-schema-change/samples/query_table.pl
View File

@@ -4,9 +4,10 @@ use strict;
use warnings FATAL => 'all'; use warnings FATAL => 'all';
use English qw(-no_match_vars); use English qw(-no_match_vars);
use DBI; use DBI;
use Time::HiRes qw(usleep); use Time::HiRes qw(usleep time);
my ($host, $port, $db, $tbl, $pkcol, $sleep_time) = @ARGV; my ($host, $port, $db, $tbl, $pkcol, $stop_file, $sleep_time) = @ARGV;
die "I need a stop_file argument" unless $stop_file;
my $dbh = DBI->connect( my $dbh = DBI->connect(
"DBI:mysql:$db;host=$host;port=$port;mysql_read_default_group=client", "DBI:mysql:$db;host=$host;port=$port;mysql_read_default_group=client",
'msandbox', 'msandbox', 'msandbox', 'msandbox',
@@ -23,7 +24,7 @@ my $start_xa = "START TRANSACTION /*!40108 WITH CONSISTENT SNAPSHOT */";
$dbh->do($start_xa); $dbh->do($start_xa);
for my $i ( 1..5_000 ) { for my $i ( 1..5_000 ) {
last if -f '/tmp/query_table.stop'; last if -f $stop_file;
eval { eval {
# We do roughly 25% DELETE, 25% UPDATE and 50% INSERT. # We do roughly 25% DELETE, 25% UPDATE and 50% INSERT.
@@ -39,13 +40,15 @@ for my $i ( 1..5_000 ) {
elsif ($x == 2) { elsif ($x == 2) {
my $id = int(rand(500)) || 1; my $id = int(rand(500)) || 1;
if ( !grep { $_ == $id } @del ) { if ( !grep { $_ == $id } @del ) {
$dbh->do("update $db.$tbl set c='updated' where $pkcol=$id"); my $t=time;
$dbh->do("update $db.$tbl set c='updated row $t' where $pkcol=$id");
push @upd, $id; push @upd, $id;
} }
} }
else { else {
my $id = 500 + $i; my $id = 500 + $i;
$dbh->do("insert ignore into $db.$tbl ($pkcol, c) values ($id, 'inserted')"); my $t=time;
$dbh->do("insert ignore into $db.$tbl ($pkcol, c) values ($id, 'new row $t')");
push @ins, $id; push @ins, $id;
} }