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Merge pull request #81 from percona/pt-table-checksum-skip-table-tolerance-lp1389041

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pt-t-c add --slave-skip-tolerance option
This commit is contained in:
Frank Cizmich
2016-03-02 14:40:42 -03:00
parent 68c4c7dbe4 8baa9743c2
commit aeaf37ed9f
1 changed files with 13 additions and 1 deletions
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14
bin/pt-table-checksum
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@@ -9990,8 +9990,9 @@ sub main {
. $slave->name() . ": $e";
}
PTDEBUG && _d('Table on', $slave->name(), 'has', $n_rows, 'rows');
my $slave_skip_tolerance = $o->get('slave-skip-tolerance') || 1;
if ( $n_rows
&& $n_rows > ($tbl->{chunk_size} * $chunk_size_limit) )
&& $n_rows > ($tbl->{chunk_size} * $chunk_size_limit) * $slave_skip_tolerance )
{
PTDEBUG && _d('Table too large on', $slave->name());
push @too_large, [$slave->name(), $n_rows || 0];
@@ -12610,6 +12611,17 @@ short form: -S; type: string; group: Connection
Socket file to use for connection.
=item --slave-skip-tolerance
type: float; default: 1.0
When a master table is marked to be checksumed in only one chunk but a slave
table exceeds the maximum accepted size for this, the table is skipped by default.
Since number of rows are often rough estimates, many times tables are skipped
needlessly for very small differences.
This option provides a max row excess tolerance to prevent this.
Example: A value of 1.2 will tolerate slave tables with up to 20% excess rows.
=item --tables
short form: -t; type: hash; group: Filter