percona/percona-toolkit
1
0
Fork 0
mirror of https://github.com/percona/percona-toolkit.git synced 2025-09-23 21:05:00 +00:00
Code Issues Packages Projects Releases Wiki Activity

Untested but working first attempt to nibble rows below first lower boundary and above last upper boundary.

Browse Source
This commit is contained in:
Daniel Nichter
2011-11-14 17:53:46 -07:00
parent fbb80008de
commit 6dd46590e2
2 changed files with 196 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

199
bin/pt-table-checksum
View File

@@ -3730,6 +3730,7 @@ sub statements {
sub boundaries {
my ($self) = @_;
return {
first_lower => $self->{first_lower},
lower => $self->{lower},
upper => $self->{upper},
next_lower => $self->{next_lower},
@@ -3915,7 +3916,8 @@ sub _get_bounds {
my $dbh = $self->{Cxn}->dbh();
$self->{next_lower} = $dbh->selectrow_arrayref($self->{first_lb_sql});
$self->{first_lower} = $dbh->selectrow_arrayref($self->{first_lb_sql});
$self->{next_lower} = $self->{first_lower};
MKDEBUG && _d('First lower boundary:', Dumper($self->{next_lower}));
$self->{last_upper} = $dbh->selectrow_arrayref($self->{last_ub_sql});
@@ -4015,6 +4017,7 @@ sub DESTROY {
my ( $self ) = @_;
foreach my $key ( keys %$self ) {
if ( $key =~ m/_sth$/ ) {
MKDEBUG && _d('Finish', $key);
$self->{$key}->finish();
}
}
@@ -4035,6 +4038,185 @@ sub _d {
# End NibbleIterator package
# ###########################################################################
# ###########################################################################
# OobNibbleIterator package
# This package is a copy without comments from the original. The original
# with comments and its test file can be found in the Bazaar repository at,
# lib/OobNibbleIterator.pm
# t/lib/OobNibbleIterator.t
# See https://launchpad.net/percona-toolkit for more information.
# ###########################################################################
{
package OobNibbleIterator;
use base 'NibbleIterator';
use strict;
use warnings FATAL => 'all';
use English qw(-no_match_vars);
use constant MKDEBUG => $ENV{MKDEBUG} || 0;
use Data::Dumper;
$Data::Dumper::Indent = 1;
$Data::Dumper::Sortkeys = 1;
$Data::Dumper::Quotekeys = 0;
sub new {
my ( $class, %args ) = @_;
my @required_args = qw();
foreach my $arg ( @required_args ) {
die "I need a $arg argument" unless $args{$arg};
}
my $self = $class->SUPER::new(%args);
my $q = $self->{Quoter};
my $o = $self->{OptionParser};
my $where = $o->get('where');
if ( !$self->one_nibble() ) {
my $head_sql
= ($args{past_dms} || "SELECT ")
. ($args{past_select}
|| join(', ', map { $q->quote($_) } @{$self->{sql}->{columns}}))
. " FROM " . $self->{sql}->{from};
my $tail_sql
= ($where ? " AND ($where)" : '')
. " ORDER BY " . $self->{sql}->{order_by};
my $past_lower_sql
= $head_sql
. " WHERE " . $self->{sql}->{boundaries}->{'<'}
. $tail_sql
. " /*past lower chunk*/";
MKDEBUG && _d('Past lower statement:', $past_lower_sql);
my $explain_past_lower_sql
= "EXPLAIN SELECT "
. ($args{past_select}
|| join(', ', map { $q->quote($_) } @{$self->{sql}->{columns}}))
. " FROM " . $self->{sql}->{from}
. " WHERE " . $self->{sql}->{boundaries}->{'<'}
. $tail_sql
. " /*explain past lower chunk*/";
MKDEBUG && _d('Past lower statement:', $explain_past_lower_sql);
my $past_upper_sql
= $head_sql
. " WHERE " . $self->{sql}->{boundaries}->{'>'}
. $tail_sql
. " /*past upper chunk*/";
MKDEBUG && _d('Past upper statement:', $past_upper_sql);
my $explain_past_upper_sql
= "EXPLAIN SELECT "
. ($args{past_select}
|| join(', ', map { $q->quote($_) } @{$self->{sql}->{columns}}))
. " FROM " . $self->{sql}->{from}
. " WHERE " . $self->{sql}->{boundaries}->{'>'}
. $tail_sql
. " /*explain past upper chunk*/";
MKDEBUG && _d('Past upper statement:', $explain_past_upper_sql);
$self->{past_lower_sql} = $past_lower_sql;
$self->{past_upper_sql} = $past_upper_sql;
$self->{explain_past_lower_sql} = $explain_past_lower_sql;
$self->{explain_past_upper_sql} = $explain_past_upper_sql;
$self->{past_nibbles} = [qw(lower upper)]; # what we nibble
}
return bless $self, $class;
}
sub more_boundaries {
my ($self) = @_;
return $self->SUPER::more_boundaries() if $self->{one_nibble};
return scalar @{$self->{past_nibbles}} ? 1 : 0;
}
sub statements {
my ($self) = @_;
my $sths = $self->SUPER::statements();
$sths->{past_lower_boundary} = $self->{past_lower_sth};
$sths->{past_upper_boundary} = $self->{past_upper_sth};
return $sths;
}
sub _prepare_sths {
my ($self) = @_;
MKDEBUG && _d('Preparing boundless statement handles');
if ( !$self->{one_nibble} ) {
my $dbh = $self->{Cxn}->dbh();
$self->{past_lower_sth} = $dbh->prepare($self->{past_lower_sql});
$self->{past_upper_sth} = $dbh->prepare($self->{past_upper_sql});
$self->{explain_past_lower_sth} = $dbh->prepare($self->{explain_past_lower_sql});
$self->{explain_past_upper_sth} = $dbh->prepare($self->{explain_past_upper_sql});
}
return $self->SUPER::_prepare_sths();
}
sub _next_boundaries {
my ($self) = @_;
return $self->SUPER::_next_boundaries() unless $self->{no_more_boundaries};
if ( my $past = shift @{$self->{past_nibbles}} ) {
if ( $past eq 'lower' ) {
MKDEBUG && _d('Nibbling values below lower boundary');
$self->{nibble_sth} = $self->{past_lower_sth};
$self->{explain_nibble_sth} = $self->{explain_past_lower_sth};
$self->{lower} = [];
$self->{upper} = $self->boundaries()->{first_lower};
$self->{next_lower} = undef;
}
elsif ( $past eq 'upper' ) {
MKDEBUG && _d('Nibbling values above upper boundary');
$self->{nibble_sth} = $self->{past_upper_sth};
$self->{explain_nibble_sth} = $self->{explain_past_upper_sth};
$self->{lower} = $self->boundaries()->{last_upper};
$self->{upper} = [];
$self->{next_lower} = undef;
}
else {
die "Invalid past nibble: $past";
}
return 1; # continue nibbling
}
MKDEBUG && _d('Done nibbling past boundaries');
return; # stop nibbling
}
sub DESTROY {
my ( $self ) = @_;
foreach my $key ( keys %$self ) {
if ( $key =~ m/_sth$/ ) {
MKDEBUG && _d('Finish', $key);
$self->{$key}->finish();
}
}
return;
}
sub _d {
my ($package, undef, $line) = caller 0;
@_ = map { (my $temp = $_) =~ s/\n/\n# /g; $temp; }
map { defined $_ ? $_ : 'undef' }
@_;
print STDERR "# $package:$line $PID ", join(' ', @_), "\n";
}
1;
}
# ###########################################################################
# End OobNibbleIterator package
# ###########################################################################
# ###########################################################################
# Daemon package
# This package is a copy without comments from the original. The original
@@ -5910,10 +6092,11 @@ sub main {
# Checksum args and the DMS part of the checksum query for each table.
# ########################################################################
my %crc_args = $rc->get_crc_args(dbh => $master_dbh);
my $checksum_dms = "REPLACE INTO $repl_table "
. "(db, tbl, chunk, chunk_index,"
. " lower_boundary, upper_boundary, this_cnt, this_crc) "
. "SELECT ?, ?, ?, ?, ?, ?,";
my $checksum_dml = "REPLACE INTO $repl_table "
. "(db, tbl, chunk, chunk_index,"
. " lower_boundary, upper_boundary, this_cnt, this_crc) "
. "SELECT ?, ?, ?, ?, ?, ?,";
my $past_cols = " COUNT(*), '0'";
# ########################################################################
# Get last chunk for --resume.
@@ -6362,13 +6545,15 @@ sub main {
);
my $nibble_iter;
eval {
$nibble_iter = new NibbleIterator(
$nibble_iter = new OobNibbleIterator(
Cxn => $master_cxn,
tbl => $tbl,
chunk_size => $tbl->{chunk_size},
chunk_index => $o->get('chunk-index'),
dms => $checksum_dms,
dms => $checksum_dml,
select => $checksum_cols,
past_dms => $checksum_dml,
past_select => $past_cols,
callbacks => $callbacks,
OptionParser => $o,
Quoter => $q,