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Large events are now processed in chuncks

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The router->last_written is used to store the position where the last event was
written. The replication header is also stored in a separate structure in
the router which is used later when the last packet of a multi-packet event
arrives.
This commit is contained in:
Markus Makela
2016-02-08 17:19:55 +02:00
parent d3e1d4dd2f
commit ae33df3cbc
5 changed files with 115 additions and 77 deletions
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16
server/modules/include/blr.h
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@ -198,6 +198,14 @@
#define MYSQL_ERROR_MSG(buf) ((uint8_t *)GWBUF_DATA(buf) + 7)
#define MYSQL_COMMAND(buf) (*((uint8_t *)GWBUF_DATA(buf) + 4))
enum blr_event_state
{
BLR_EVENT_DONE,
BLR_EVENT_STARTED,
BLR_EVENT_ONGOING,
BLR_EVENT_COMPLETE
};
/* Master Server configuration struct */
typedef struct master_server_config {
char *host;
@ -415,7 +423,8 @@ typedef struct router_instance {
SPINLOCK binlog_lock; /*< Lock to control update of the binlog position */
int trx_safe; /*< Detect and handle partial transactions */
int pending_transaction; /*< Pending transaction */
int pending_16mb; /*< Pending larger than 16mb transmission */
enum blr_event_state master_event_state; /*< Packet read state */
REP_HEADER stored_header; /*< Relication header of the event the master is sending */
uint64_t last_safe_pos; /* last committed transaction */
char binlog_name[BINLOG_FNAMELEN+1];
/*< Name of the current binlog file */
@ -426,7 +435,8 @@ typedef struct router_instance {
int binlog_fd; /*< File descriptor of the binlog
* file being written
*/
uint64_t last_written; /*< Position of last event written */
uint64_t last_written; /*< Position of the last write operation */
uint64_t last_event_pos; /*< Position of last event written */
uint64_t current_safe_event;
/*< Position of the latest safe event being sent to slaves */
char prevbinlog[BINLOG_FNAMELEN+1];
@ -557,7 +567,7 @@ extern int blr_slave_catchup(ROUTER_INSTANCE *router, ROUTER_SLAVE *slave, bool
extern void blr_init_cache(ROUTER_INSTANCE *);
extern int blr_file_init(ROUTER_INSTANCE *);
extern int blr_write_binlog_record(ROUTER_INSTANCE *, REP_HEADER *,uint8_t *);
extern int blr_write_binlog_record(ROUTER_INSTANCE *, REP_HEADER *, uint32_t pos, uint8_t *);
extern int blr_file_rotate(ROUTER_INSTANCE *, char *, uint64_t);
extern void blr_file_flush(ROUTER_INSTANCE *);
extern BLFILE *blr_open_binlog(ROUTER_INSTANCE *, char *);