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Add a new config variable wsrep_certification_rules

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This is used for controlling whether to use a new/optimized
certification rules or the old/classic ones that could cause more
certification failures - when foreign keys are used and two INSERTs are
done concurrently to the child table from different nodes.

(cherry picked from commit 815d73e6af8daace6262ab63ca6c043ffc4204b3)
This commit is contained in:
Vasil Dimov 2018-06-06 17:25:51 +02:00 committed by Jan Lindström
parent 6aa578ec5a
commit 27dcef3900
5 changed files with 31 additions and 4 deletions
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13
sql/sys_vars.cc
View file

@ -3887,6 +3887,19 @@ static Sys_var_mybool Sys_wsrep_certify_nonPK(
GLOBAL_VAR(wsrep_certify_nonPK),
CMD_LINE(OPT_ARG), DEFAULT(TRUE));
static const char *wsrep_certification_rules_names[]= { "strict", "optimized", NullS };
static Sys_var_enum Sys_wsrep_certification_rules(
"wsrep_certification_rules",
"Certification rules to use in the cluster. Possible values are: "
"\"strict\": stricter rules that could result in more certification "
"failures. "
"\"optimized\": relaxed rules that allow more concurrency and "
"cause less certification failures.",
READ_ONLY GLOBAL_VAR(wsrep_certification_rules), CMD_LINE(REQUIRED_ARG),
wsrep_certification_rules_names, DEFAULT(WSREP_CERTIFICATION_RULES_STRICT),
NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0),
ON_UPDATE(0));
static Sys_var_mybool Sys_wsrep_causal_reads(
"wsrep_causal_reads", "(DEPRECATED) Setting this variable is equivalent "
"to setting wsrep_sync_wait READ flag",

1
sql/wsrep_mysqld.cc
View file

@ -51,6 +51,7 @@ ulong wsrep_max_ws_size = 1073741824UL;//max ws (RBR buffer) size
ulong wsrep_max_ws_rows = 65536; // max number of rows in ws
int wsrep_to_isolation = 0; // # of active TO isolation threads
my_bool wsrep_certify_nonPK = 1; // certify, even when no primary key
ulong wsrep_certification_rules = WSREP_CERTIFICATION_RULES_STRICT;
long wsrep_max_protocol_version = 3; // maximum protocol version to use
ulong wsrep_forced_binlog_format = BINLOG_FORMAT_UNSPEC;
my_bool wsrep_recovery = 0; // recovery

2
sql/wsrep_mysqld.h
View file

@ -20,6 +20,7 @@
typedef struct st_mysql_show_var SHOW_VAR;
#include <sql_priv.h>
#include "../wsrep/wsrep_api.h"
#include "wsrep_mysqld_c.h"
#define WSREP_UNDEFINED_TRX_ID ULONGLONG_MAX
@ -58,7 +59,6 @@ enum wsrep_consistency_check_mode {
CONSISTENCY_CHECK_RUNNING,
};
// Global wsrep parameters
extern wsrep_t* wsrep;

18
storage/innobase/row/row0ins.c
View file

@ -58,6 +58,7 @@ Created 4/20/1996 Heikki Tuuri
#ifdef WITH_WSREP
#include "../../../wsrep/wsrep_api.h"
#include "wsrep_mysqld_c.h"
#endif /* WITH_WSREP */
/*************************************************************************
@ -1435,15 +1436,26 @@ run_again:
if (check_ref) {
err = DB_SUCCESS;
#ifdef WITH_WSREP
enum wsrep_key_type key_type = WSREP_KEY_EXCLUSIVE;
if (upd_node != NULL) {
key_type = WSREP_KEY_SHARED;
} else {
switch (wsrep_certification_rules) {
case WSREP_CERTIFICATION_RULES_STRICT:
key_type = WSREP_KEY_EXCLUSIVE;
break;
case WSREP_CERTIFICATION_RULES_OPTIMIZED:
key_type = WSREP_KEY_SEMI;
break;
}
}
err = wsrep_append_foreign_key(
thr_get_trx(thr),
foreign,
rec,
check_index,
check_ref,
upd_node != NULL
? WSREP_KEY_SHARED
: WSREP_KEY_EXCLUSIVE);
key_type);
#endif /* WITH_WSREP */
goto end_scan;
} else if (foreign->type != 0) {

1
storage/xtradb/row/row0ins.c
View file

@ -58,6 +58,7 @@ Created 4/20/1996 Heikki Tuuri
#ifdef WITH_WSREP
#include "../../../wsrep/wsrep_api.h"
#include "wsrep_mysqld_c.h"
#endif /* WITH_WSREP */
/*************************************************************************