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Store large events in memory

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Storing the large events in memory allows checksum calculations to be done
in one step. This also makes the encryption of events easier as they
require the complete event in memory.
This commit is contained in:
Markus Makela
2016-12-04 13:51:56 +02:00
parent 83109a6e9e
commit 2f082cb7fb
4 changed files with 95 additions and 323 deletions
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14
server/modules/routing/binlogrouter/blr.h
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@ -231,12 +231,9 @@ static const char BLR_DBUSERS_FILE[] = "dbusers";
/** Possible states of an event sent by the master */
enum blr_event_state
{
BLR_EVENT_DONE, /*< No event being processed */
BLR_EVENT_STARTED, /*< The first packet of an event which spans multiple packets
* has been received */
BLR_EVENT_STARTED, /*< The first packet of an event has been received */
BLR_EVENT_ONGOING, /*< Other packets of a multi-packet event are being processed */
BLR_EVENT_COMPLETE /*< A multi-packet event has been successfully processed
* but the router is not yet ready to process another one */
BLR_EVENT_DONE, /*< The complete event was received */
};
/* Master Server configuration struct */
@ -490,19 +487,14 @@ typedef struct router_instance
unsigned int master_state; /*< State of the master FSM */
uint8_t lastEventReceived; /*< Last even received */
uint32_t lastEventTimestamp; /*< Timestamp from last event */
GWBUF *residual; /*< Any residual binlog event */
MASTER_RESPONSES saved_master; /*< Saved master responses */
char *binlogdir; /*< The directory with the binlog files */
SPINLOCK binlog_lock; /*< Lock to control update of the binlog position */
int trx_safe; /*< Detect and handle partial transactions */
int pending_transaction; /*< Pending transaction */
enum blr_event_state master_event_state; /*< Packet read state */
uint32_t stored_checksum; /*< The current value of the checksum */
uint8_t partial_checksum[MYSQL_CHECKSUM_LEN]; /*< The partial value of the checksum
* received from the master */
uint8_t partial_checksum_bytes; /*< How many bytes of the checksum we have read */
uint64_t checksum_size; /*< Data size for the checksum */
REP_HEADER stored_header; /*< Relication header of the event the master is sending */
GWBUF *stored_event; /*< Partial even buffer */
uint64_t last_safe_pos; /* last committed transaction */
char binlog_name[BINLOG_FNAMELEN + 1];
/*< Name of the current binlog file */