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Test and require wsrep_OSU_method=TOI.

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Daniel Nichter
2012-11-29 23:26:53 +00:00
parent 13318a9710
commit 8549fe5d99
3 changed files with 57 additions and 15 deletions
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24
bin/pt-online-schema-change
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@@ -7840,6 +7840,19 @@ sub main {
. ". Please upgrade the node, or run the tool on a newer node, "
. "or contact Percona for support.\n";
}
# If wsrep_OSU_method=RSU the "DDL will be only processed locally at
# the node." So _table_new (the altered version of table) will not
# replicate to other nodes but our INSERT..SELECT operations on it
# will, thereby crashing all other nodes.
my (undef, $wsrep_osu_method) = $cxn->dbh->selectrow_array(
"SHOW VARIABLES LIKE 'wsrep\_OSU\_method'");
if ( lc($wsrep_osu_method || '') ne 'toi' ) {
die "wsrep_OSU_method=TOI is required because "
. $cxn->name . " is a cluster node. wsrep_OSU_method is "
. "currently set to " . ($wsrep_osu_method || '') . ". "
. "Set it to TOI, or contact Percona for support.\n";
}
}
# ########################################################################
@@ -9996,14 +10009,11 @@ The tool cannot alter MyISAM tables on L<"Percona XtraDB Cluster"> nodes.
=head1 Percona XtraDB Cluster
pt-online-schema-change works with Percona XtraDB Cluster (PXC) 5.5.28-23.7
and newer, but there is one limitation: only InnoDB tables can be altered.
and newer, but there are two limitations: only InnoDB tables can be altered,
and C<wsrep_OSU_method> must be set to C<TOI> (total order isolation).
The tool exits with an error if the host is a cluster node and the table
is MyISAM or is being converted to MyISAM (C<ENGINE=MyISAM>). There is no
way to disable this check.
pt-online-schema-change is not the same as and does not require that
C<wsrep_OSU_method> be set to C<RSU> (rolling schema upgrade). The tool
can be used in either mode, C<RSU> or C<TOI> (total order isolation).
is MyISAM or is being converted to MyISAM (C<ENGINE=MyISAM>), or if
C<wsrep_OSU_method> is not C<TOI>. There is no way to disable these checks.
=head1 OUTPUT