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MXS-1075: save all received MariaDB GTIds

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The GTID saving, which will allow slave to connect with GTID, is done
only with transaction_safety = on
This commit is contained in:
MassimilianoPinto
2017-03-02 13:07:21 +01:00
parent b24ac12601
commit 1061344de9
5 changed files with 210 additions and 32 deletions
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75
server/modules/routing/binlogrouter/blr_file.c
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@ -172,6 +172,7 @@ static void blr_format_event_size(double *event_size, char *label);
extern int MaxScaleUptime();
extern void encode_value(unsigned char *data, unsigned int value, int len);
extern void blr_extract_header(register uint8_t *ptr, register REP_HEADER *hdr);
int blr_save_mariadb_gtid(ROUTER_INSTANCE *inst);
typedef struct binlog_event_desc
{
@ -2055,13 +2056,6 @@ blr_read_events_all_events(ROUTER_INSTANCE *router,
if ((flags & (MARIADB_FL_DDL | MARIADB_FL_STANDALONE)) == 0)
{
char mariadb_gtid[GTID_MAX_LEN + 1];
snprintf(mariadb_gtid, GTID_MAX_LEN, "%u-%u-%lu",
domainid, hdr.serverid,
n_sequence);
strcpy(router->mariadb_gtid, mariadb_gtid);
if (pending_transaction > BLRM_NO_TRANSACTION)
{
MXS_ERROR("Transaction cannot be @ pos %llu: "
@ -2076,7 +2070,21 @@ blr_read_events_all_events(ROUTER_INSTANCE *router,
}
else
{
pending_transaction = 1;
char mariadb_gtid[GTID_MAX_LEN + 1];
snprintf(mariadb_gtid, GTID_MAX_LEN, "%u-%u-%lu",
domainid, hdr.serverid,
n_sequence);
pending_transaction = BLRM_TRANSACTION_START;
router->pending_transaction.start_pos = pos;
router->pending_transaction.end_pos = 0;
/* Set MariaDB GTID */
if (router->mariadb_gtid)
{
strcpy(router->pending_transaction.gtid, mariadb_gtid);
}
transaction_events = 0;
event_bytes = 0;
@ -2134,6 +2142,9 @@ blr_read_events_all_events(ROUTER_INSTANCE *router,
{
pending_transaction = BLRM_TRANSACTION_START;
router->pending_transaction.start_pos = pos;
router->pending_transaction.end_pos = 0;
transaction_events = 0;
event_bytes = 0;
if (!(debug & BLR_CHECK_ONLY))
@ -2190,12 +2201,26 @@ blr_read_events_all_events(ROUTER_INSTANCE *router,
MXS_DEBUG("< Transaction @ pos %llu, is now closed @ %llu. %lu events seen",
last_known_commit, pos, transaction_events);
}
pending_transaction = BLRM_NO_TRANSACTION;
router->pending_transaction.end_pos = hdr.next_pos;
last_known_commit = pos;
/* Reset the event replacing indicator */
replace_trx_events = false;
if (router->mariadb10_compat &&
router->mariadb_gtid)
{
/* Update Last Seen MariaDB GTID */
strcpy(router->last_mariadb_gtid, router->pending_transaction.gtid);
/* Save MariaDB 10 GTID */
blr_save_mariadb_gtid(router);
}
total_events += transaction_events;
if (transaction_events > max_events)
@ -3273,3 +3298,37 @@ static void blr_report_checksum(REP_HEADER hdr, const uint8_t *buffer, char *out
*p = tolower(*p);
}
}
/**
* Save MariaDB GTID found in complete transaction
*
* @param inst The router instance
* @return 1 on success, 0 otherwise
*/
int blr_save_mariadb_gtid(ROUTER_INSTANCE *inst)
{
MARIADB_GTID_INFO gtid_info;
gtid_info.gtid = inst->pending_transaction.gtid;
gtid_info.start = inst->pending_transaction.start_pos;
gtid_info.end = inst->pending_transaction.end_pos;
/* Save GTID into repo */
if (!hashtable_add(inst->gtid_repo,
inst->pending_transaction.gtid,
&gtid_info))
{
MXS_ERROR("Service %s: error saving mariadb GTID %s into repo",
inst->service->name,
inst->pending_transaction.gtid);
return 0;
}
MXS_DEBUG("Saved MariaDB GTID '%s', %s:%lu:%lu",
gtid_info.gtid,
inst->binlog_name,
gtid_info.start,
gtid_info.end);
return 1;
}