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PT-1551 New wait for master method to pt-table-checksum

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This is part of PT-1554. While I was testing pt-table-checksum
ignore_columns.t was failing and it was because the original method in
pt-table-checksum to wait for the slaves to catch up, wasn't enough.
I added a new method who calls MySQL's SELECT MASTER_POS_WAIT from the
MasterSlave package.
This commit is contained in:
Carlos Salguero
2018-06-22 13:00:41 -03:00
parent c1d0134525
commit d9142df0f6
3 changed files with 24 additions and 5 deletions
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22
bin/pt-table-checksum
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@@ -6238,9 +6238,9 @@ sub find_replication_differences {
}
my ($dbh, $repl_table) = @args{@required_args};
my $tries = $self->{'OptionParser'}->get('replicate-check-retries') || 1;
my $diffs;
while ($tries--) {
my $sql
= "SELECT CONCAT(db, '.', tbl) AS `table`, "
@@ -6258,7 +6258,7 @@ sub find_replication_differences {
if (!@$diffs || !$tries) { # if no differences are found OR we are out of tries left...
last; # get out now
}
sleep 1;
sleep 1;
}
return $diffs;
}
@@ -11271,6 +11271,10 @@ sub main {
# Wait for the last checksum of this table to replicate
# to each slave.
# MySQL 8+ replication is slower than 5.7 and the old wait_for_last_checksum alone
# was failing. The new wait_for_slaves checks that Read_Master_Log_Pos on slaves is
# greather or equal Position in the master
wait_for_slaves(master_dbh => $args{Cxn}->dbh(), master_slave => $ms, slaves => $slaves);
wait_for_last_checksum(
tbl => $tbl,
repl_table => $repl_table,
@@ -12337,6 +12341,20 @@ sub have_more_chunks {
return 1; # more chunks
}
sub wait_for_slaves {
my (%args) = @_;
my @required_args = qw(master_dbh master_slave slaves);
foreach my $arg ( @required_args ) {
die "I need a $arg argument" unless $args{$arg};
}
my ($master_dbh, $ms, $slaves) = @args{@required_args};
my $master_status = $ms->get_master_status($master_dbh);
foreach my $slave ( @$slaves ) {
$ms->wait_for_master(master_status => $master_status, slave_dbh => $slave->dbh());
}
}
sub wait_for_last_checksum {
my (%args) = @_;
my @required_args = qw(tbl repl_table slaves max_chunk have_time OptionParser);