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Retry metadata locks. Add --plugin to make testing this easier. Print --statistics in cleanup tasks. Add a helper script for myself: sandbox/set-mysql.

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This commit is contained in:
Daniel Nichter
2013-02-28 12:29:17 -07:00
parent b1e54cce8e
commit 5b56f8fccc
7 changed files with 555 additions and 546 deletions
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836
bin/pt-online-schema-change
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23
sandbox/set-mysql Executable file
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@@ -0,0 +1,23 @@
#!/bin/bash
if [ ! -d "$HOME/mysql-bin" ]; then
echo "$HOME/mysql-bin does not exist." >&2
exit 1
fi
VER=$1
if [ "$VER" ]; then
if [ "$VER" != "4.1" -a "$VER" != "5.0" -a "$VER" != "5.1" -a "$VER" != "5.5" -a "$VER" != "5.6" ]; then
echo "VERSION must be 4.1, 5.0, 5.1, 5.5, or 5.6. Or, do not specify a version to select all available versions." >&2
exit 1
fi
else
VER='';
fi
select choice in $(ls -d $HOME/mysql-bin/mysql-$VER* | sort -r); do
echo "export PERCONA_TOOLKIT_SANDBOX=$choice"
break
done
exit

102
t/pt-online-schema-change/metadata_locks.t Normal file
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@@ -0,0 +1,102 @@
#!/usr/bin/env perl
BEGIN {
die "The PERCONA_TOOLKIT_BRANCH environment variable is not set.\n"
unless $ENV{PERCONA_TOOLKIT_BRANCH} && -d $ENV{PERCONA_TOOLKIT_BRANCH};
unshift @INC, "$ENV{PERCONA_TOOLKIT_BRANCH}/lib";
};
use strict;
use warnings FATAL => 'all';
use English qw(-no_match_vars);
use Test::More;
use PerconaTest;
use Sandbox;
require "$trunk/bin/pt-online-schema-change";
require VersionParser;
use Time::HiRes qw(sleep);
use Data::Dumper;
$Data::Dumper::Indent = 1;
$Data::Dumper::Sortkeys = 1;
$Data::Dumper::Quotekeys = 0;
my $dp = new DSNParser(opts=>$dsn_opts);
my $sb = new Sandbox(basedir => '/tmp', DSNParser => $dp);
my $dbh1 = $sb->get_dbh_for('master');
my $dbh2 = $sb->get_dbh_for('master');
if ( !$dbh1 || !$dbh2 ) {
plan skip_all => 'Cannot connect to sandbox master';
}
elsif ( $sandbox_version lt '5.5' ) {
plan skip_all => "Metadata locks require MySQL 5.5 and newer";
}
my $output;
my $master_dsn = $sb->dsn_for('master');
my $sample = "t/pt-online-schema-change/samples";
my $plugin = "$trunk/$sample/plugins";
my $exit;
my $rows;
# Loads pt_osc.t with cols id (pk), c (unique index),, d.
$sb->load_file('master', "$sample/basic_no_fks_innodb.sql");
# #############################################################################
# Meta-block on create_triggers.
# #############################################################################
($output) = full_output(
sub { pt_online_schema_change::main(
"$master_dsn,D=pt_osc,t=t",
qw(--statistics --execute --retries 2 --set-vars lock_wait_timeout=1),
'--plugin', "$plugin/block_create_triggers.pm",
)},
stderr => 1,
);
like(
$output,
qr/Error creating triggers: .+? Lock wait timeout exceeded/,
"Lock wait timeout creating triggers"
);
like(
$output,
qr/lock_wait_timeout\s+2/,
"Retried create triggers"
);
# #############################################################################
# Meta-block on swap_tables.
# #############################################################################
($output) = full_output(
sub { pt_online_schema_change::main(
"$master_dsn,D=pt_osc,t=t",
qw(--statistics --execute --retries 2 --set-vars lock_wait_timeout=1),
'--plugin', "$plugin/block_swap_tables.pm",
)},
stderr => 1,
);
like(
$output,
qr/Error swapping tables: .+? Lock wait timeout exceeded/,
"Lock wait timeout swapping tables"
);
like(
$output,
qr/lock_wait_timeout\s+2/,
"Retried swap tables"
);
# #############################################################################
# Done.
# #############################################################################
$sb->wipe_clean($dbh1);
ok($sb->ok(), "Sandbox servers") or BAIL_OUT(__FILE__ . " broke the sandbox");
done_testing;

46
t/pt-online-schema-change/samples/plugins/block_create_triggers.pm Normal file
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@@ -0,0 +1,46 @@
package pt_online_schema_change_plugin;
use strict;
use warnings FATAL => 'all';
use English qw(-no_match_vars);
use constant PTDEBUG => $ENV{PTDEBUG} || 0;
sub new {
my ($class, %args) = @_;
my $self = { %args };
return bless $self, $class;
}
sub init {
my ($self, %args) = @_;
print "PLUGIN: init()\n";
$self->{orig_tbl} = $args{orig_tbl};
}
sub before_create_triggers {
my ($self, %args) = @_;
print "PLUGIN: before_create_triggers()\n";
my $dbh = $self->{aux_cxn}->dbh;
my $orig_tbl = $self->{orig_tbl};
# Start a trx and get a metadata lock on the table being altered.
$dbh->do('SET autocommit=0');
$dbh->{AutoCommit} = 0;
$dbh->do("START TRANSACTION");
$dbh->do("SELECT * FROM " . $orig_tbl->{name});
return;
}
sub after_create_triggers {
my ($self, %args) = @_;
print "PLUGIN: after_create_triggers()\n";
my $dbh = $self->{aux_cxn}->dbh;
# Commit the trx to release the metadata lock.
$dbh->commit();
}
1;

46
t/pt-online-schema-change/samples/plugins/block_swap_tables.pm Normal file
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@@ -0,0 +1,46 @@
package pt_online_schema_change_plugin;
use strict;
use warnings FATAL => 'all';
use English qw(-no_match_vars);
use constant PTDEBUG => $ENV{PTDEBUG} || 0;
sub new {
my ($class, %args) = @_;
my $self = { %args };
return bless $self, $class;
}
sub init {
my ($self, %args) = @_;
print "PLUGIN: init()\n";
$self->{orig_tbl} = $args{orig_tbl};
}
sub before_swap_tables {
my ($self, %args) = @_;
print "PLUGIN: before_swap_tables()\n";
my $dbh = $self->{aux_cxn}->dbh;
my $orig_tbl = $self->{orig_tbl};
# Start a trx and get a metadata lock on the table being altered.
$dbh->do('SET autocommit=0');
$dbh->{AutoCommit} = 0;
$dbh->do("START TRANSACTION");
$dbh->do("SELECT * FROM " . $orig_tbl->{name});
return;
}
sub before_drop_triggers {
my ($self, %args) = @_;
print "PLUGIN: before_drop_triggers()\n";
my $dbh = $self->{aux_cxn}->dbh;
# Commit the trx to release the metadata lock.
$dbh->commit();
}
1;

6
t/pt-online-schema-change/samples/stats-dry-run.txt
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@@ -2,6 +2,9 @@ Starting a dry run. `bug_1045317`.`bits` will not be altered. Specify --execut
Not dropping triggers because this is a dry run.
Dropping new table...
Dropped new table OK.
# Event Count
# ====== =====
# INSERT 0
Dry run complete. `bug_1045317`.`bits` was not altered.
Creating new table...
Created new table bug_1045317._bits_new OK.
@@ -11,6 +14,3 @@ Not creating triggers because this is a dry run.
Not copying rows because this is a dry run.
Not swapping tables because this is a dry run.
Not dropping old table because this is a dry run.
# Event Count
# ====== =====
# INSERT 0

8
t/pt-online-schema-change/samples/stats-execute-5.5.txt
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@@ -1,6 +1,10 @@
Altering `bug_1045317`.`bits`...
Dropping triggers...
Dropped triggers OK.
# Event Count
# ================== =====
# INSERT 1
# mysql_warning_1592 1
Successfully altered `bug_1045317`.`bits`.
Creating new table...
Created new table bug_1045317._bits_new OK.
@@ -14,7 +18,3 @@ Swapping tables...
Swapped original and new tables OK.
Dropping old table...
Dropped old table `bug_1045317`.`_bits_old` OK.
# Event Count
# ================== =====
# INSERT 1
# mysql_warning_1592 1