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mydumper.c
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mydumper.c
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/*
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Authors: Domas Mituzas, Facebook ( domas at fb dot com )
Mark Leith, Oracle Corporation (mark dot leith at oracle dot com)
Andrew Hutchings, SkySQL (andrew at skysql dot com)
Max Bubenick, Percona RDBA (max dot bubenick at percona dot com)
*/
#define _LARGEFILE64_SOURCE
#define _FILE_OFFSET_BITS 64
#include <mysql.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <glib.h>
#include <stdlib.h>
#include <stdarg.h>
#include <errno.h>
#include <time.h>
#include <zlib.h>
#include <pcre.h>
#include <signal.h>
#include <glib/gstdio.h>
#include "config.h"
#ifdef WITH_BINLOG
#include "binlog.h"
#else
#include "mydumper.h"
#endif
#include "server_detect.h"
#include "common.h"
#include "g_unix_signal.h"
#include <math.h>
char *regexstring=NULL;
const char DIRECTORY[]= "export";
#ifdef WITH_BINLOG
const char BINLOG_DIRECTORY[]= "binlog_snapshot";
const char DAEMON_BINLOGS[]= "binlogs";
#endif
static GMutex * init_mutex = NULL;
/* Program options */
gchar *output_directory= NULL;
guint statement_size= 1000000;
guint rows_per_file= 0;
guint chunk_filesize = 0;
int longquery= 60;
int build_empty_files= 0;
int skip_tz= 0;
int need_dummy_read= 0;
int need_dummy_toku_read = 0;
int compress_output= 0;
int killqueries= 0;
int detected_server= 0;
int lock_all_tables=0;
guint snapshot_interval= 60;
gboolean daemon_mode= FALSE;
gboolean have_snapshot_cloning= FALSE;
gchar *ignore_engines= NULL;
char **ignore= NULL;
gchar *tables_list= NULL;
char **tables= NULL;
GList *no_updated_tables=NULL;
#ifdef WITH_BINLOG
gboolean need_binlogs= FALSE;
gchar *binlog_directory= NULL;
gchar *daemon_binlog_directory= NULL;
#endif
gchar *logfile= NULL;
FILE *logoutfile= NULL;
gboolean no_schemas= FALSE;
gboolean no_data= FALSE;
gboolean no_locks= FALSE;
gboolean dump_triggers= FALSE;
gboolean dump_events= FALSE;
gboolean dump_routines= FALSE;
gboolean no_dump_views= FALSE;
gboolean less_locking = FALSE;
gboolean use_savepoints = FALSE;
gboolean success_on_1146 = FALSE;
gboolean no_backup_locks = FALSE;
gboolean insert_ignore = FALSE;
GList *innodb_tables= NULL;
GList *non_innodb_table= NULL;
GList *table_schemas= NULL;
GList *view_schemas= NULL;
GList *schema_post= NULL;
gint non_innodb_table_counter= 0;
gint non_innodb_done= 0;
guint less_locking_threads = 0;
guint updated_since = 0;
guint trx_consistency_only = 0;
guint complete_insert = 0;
// For daemon mode, 0 or 1
guint dump_number= 0;
guint binlog_connect_id= 0;
gboolean shutdown_triggered= FALSE;
GAsyncQueue *start_scheduled_dump;
GMainLoop *m1;
static GCond * ll_cond = NULL;
static GMutex * ll_mutex = NULL;
int errors;
static GOptionEntry entries[] =
{
{ "database", 'B', 0, G_OPTION_ARG_STRING, &db, "Database to dump", NULL },
{ "tables-list", 'T', 0, G_OPTION_ARG_STRING, &tables_list, "Comma delimited table list to dump (does not exclude regex option)", NULL },
{ "outputdir", 'o', 0, G_OPTION_ARG_FILENAME, &output_directory, "Directory to output files to", NULL },
{ "statement-size", 's', 0, G_OPTION_ARG_INT, &statement_size, "Attempted size of INSERT statement in bytes, default 1000000", NULL},
{ "rows", 'r', 0, G_OPTION_ARG_INT, &rows_per_file, "Try to split tables into chunks of this many rows. This option turns off --chunk-filesize", NULL},
{ "chunk-filesize", 'F', 0, G_OPTION_ARG_INT, &chunk_filesize, "Split tables into chunks of this output file size. This value is in MB", NULL },
{ "compress", 'c', 0, G_OPTION_ARG_NONE, &compress_output, "Compress output files", NULL},
{ "build-empty-files", 'e', 0, G_OPTION_ARG_NONE, &build_empty_files, "Build dump files even if no data available from table", NULL},
{ "regex", 'x', 0, G_OPTION_ARG_STRING, ®exstring, "Regular expression for 'db.table' matching", NULL},
{ "ignore-engines", 'i', 0, G_OPTION_ARG_STRING, &ignore_engines, "Comma delimited list of storage engines to ignore", NULL },
{ "insert-ignore", 'N', 0, G_OPTION_ARG_NONE, &insert_ignore, "Dump rows with INSERT IGNORE", NULL },
{ "no-schemas", 'm', 0, G_OPTION_ARG_NONE, &no_schemas, "Do not dump table schemas with the data", NULL },
{ "no-data", 'd', 0, G_OPTION_ARG_NONE, &no_data, "Do not dump table data", NULL },
{ "triggers", 'G', 0, G_OPTION_ARG_NONE, &dump_triggers, "Dump triggers", NULL },
{ "events", 'E', 0, G_OPTION_ARG_NONE, &dump_events, "Dump events", NULL },
{ "routines", 'R', 0, G_OPTION_ARG_NONE, &dump_routines, "Dump stored procedures and functions", NULL },
{ "no-views", 'W', 0, G_OPTION_ARG_NONE, &no_dump_views, "Do not dump VIEWs", NULL },
{ "no-locks", 'k', 0, G_OPTION_ARG_NONE, &no_locks, "Do not execute the temporary shared read lock. WARNING: This will cause inconsistent backups", NULL },
{ "no-backup-locks", 0, 0, G_OPTION_ARG_NONE, &no_backup_locks, "Do not use Percona backup locks", NULL},
{ "less-locking", 0, 0, G_OPTION_ARG_NONE, &less_locking, "Minimize locking time on InnoDB tables.", NULL},
{ "long-query-guard", 'l', 0, G_OPTION_ARG_INT, &longquery, "Set long query timer in seconds, default 60", NULL },
{ "kill-long-queries", 'K', 0, G_OPTION_ARG_NONE, &killqueries, "Kill long running queries (instead of aborting)", NULL },
#ifdef WITH_BINLOG
{ "binlogs", 'b', 0, G_OPTION_ARG_NONE, &need_binlogs, "Get a snapshot of the binary logs as well as dump data", NULL },
#endif
{ "daemon", 'D', 0, G_OPTION_ARG_NONE, &daemon_mode, "Enable daemon mode", NULL },
{ "snapshot-interval", 'I', 0, G_OPTION_ARG_INT, &snapshot_interval, "Interval between each dump snapshot (in minutes), requires --daemon, default 60", NULL },
{ "logfile", 'L', 0, G_OPTION_ARG_FILENAME, &logfile, "Log file name to use, by default stdout is used", NULL },
{ "tz-utc", 0, 0, G_OPTION_ARG_NONE, NULL, "SET TIME_ZONE='+00:00' at top of dump to allow dumping of TIMESTAMP data when a server has data in different time zones or data is being moved between servers with different time zones, defaults to on use --skip-tz-utc to disable.", NULL },
{ "skip-tz-utc", 0, 0, G_OPTION_ARG_NONE, &skip_tz, "", NULL },
{ "use-savepoints", 0, 0, G_OPTION_ARG_NONE, &use_savepoints, "Use savepoints to reduce metadata locking issues, needs SUPER privilege", NULL },
{ "success-on-1146", 0, 0, G_OPTION_ARG_NONE, &success_on_1146, "Not increment error count and Warning instead of Critical in case of table doesn't exist", NULL},
{ "lock-all-tables", 0, 0, G_OPTION_ARG_NONE, &lock_all_tables, "Use LOCK TABLE for all, instead of FTWRL", NULL},
{ "updated-since", 'U', 0, G_OPTION_ARG_INT, &updated_since, "Use Update_time to dump only tables updated in the last U days", NULL},
{ "trx-consistency-only", 0, 0, G_OPTION_ARG_NONE, &trx_consistency_only, "Transactional consistency only", NULL},
{ "complete-insert", 0, 0, G_OPTION_ARG_NONE, &complete_insert, "Use complete INSERT statements that include column names", NULL},
{ NULL, 0, 0, G_OPTION_ARG_NONE, NULL, NULL, NULL }
};
struct tm tval;
void dump_schema_data(MYSQL *conn, char *database, char *table, char *filename);
void dump_triggers_data(MYSQL *conn, char *database, char *table, char *filename);
void dump_view_data(MYSQL *conn, char *database, char *table, char *filename, char *filename2);
void dump_schema(MYSQL *conn, char *database, char *table, struct configuration *conf);
void dump_view(char *database, char *table, struct configuration *conf);
void dump_table(MYSQL *conn, char *database, char *table, struct configuration *conf, gboolean is_innodb);
void dump_tables(MYSQL *, GList *, struct configuration *);
void dump_schema_post(char *database, struct configuration *conf);
void restore_charset(GString* statement);
void set_charset(GString* statement, char *character_set, char *collation_connection);
void dump_schema_post_data(MYSQL *conn, char *database, char *filename);
guint64 dump_table_data(MYSQL *, FILE *, char *, char *, char *, char *);
void dump_database(MYSQL *, char *, FILE *, struct configuration *);
void dump_create_database(MYSQL *conn, char *database);
void get_tables(MYSQL * conn, struct configuration *);
void get_not_updated(MYSQL *conn);
GList * get_chunks_for_table(MYSQL *, char *, char*, struct configuration *conf);
guint64 estimate_count(MYSQL *conn, char *database, char *table, char *field, char *from, char *to);
void dump_table_data_file(MYSQL *conn, char *database, char *table, char *where, char *filename);
void create_backup_dir(char *directory);
gboolean write_data(FILE *,GString*);
gboolean check_regex(char *database, char *table);
void no_log(const gchar *log_domain, GLogLevelFlags log_level, const gchar *message, gpointer user_data);
void set_verbose(guint verbosity);
#ifdef WITH_BINLOG
MYSQL *reconnect_for_binlog(MYSQL *thrconn);
void *binlog_thread(void *data);
#endif
void start_dump(MYSQL *conn);
MYSQL *create_main_connection();
void *exec_thread(void *data);
void write_log_file(const gchar *log_domain, GLogLevelFlags log_level, const gchar *message, gpointer user_data);
void no_log(const gchar *log_domain, GLogLevelFlags log_level, const gchar *message, gpointer user_data) {
(void) log_domain;
(void) log_level;
(void) message;
(void) user_data;
}
void set_verbose(guint verbosity) {
if (logfile) {
logoutfile = g_fopen(logfile, "w");
if (!logoutfile) {
g_critical("Could not open log file '%s' for writing: %d", logfile, errno);
exit(EXIT_FAILURE);
}
}
switch (verbosity) {
case 0:
g_log_set_handler(NULL, (GLogLevelFlags)(G_LOG_LEVEL_MASK), no_log, NULL);
break;
case 1:
g_log_set_handler(NULL, (GLogLevelFlags)(G_LOG_LEVEL_WARNING | G_LOG_LEVEL_MESSAGE), no_log, NULL);
if (logfile)
g_log_set_handler(NULL, (GLogLevelFlags)(G_LOG_LEVEL_ERROR | G_LOG_LEVEL_CRITICAL), write_log_file, NULL);
break;
case 2:
g_log_set_handler(NULL, (GLogLevelFlags)(G_LOG_LEVEL_MESSAGE), no_log, NULL);
if (logfile)
g_log_set_handler(NULL, (GLogLevelFlags)(G_LOG_LEVEL_WARNING | G_LOG_LEVEL_ERROR | G_LOG_LEVEL_WARNING | G_LOG_LEVEL_ERROR | G_LOG_LEVEL_CRITICAL), write_log_file, NULL);
break;
default:
if (logfile)
g_log_set_handler(NULL, (GLogLevelFlags)(G_LOG_LEVEL_MASK), write_log_file, NULL);
break;
}
}
gboolean sig_triggered(gpointer user_data) {
(void) user_data;
g_message("Shutting down gracefully");
shutdown_triggered= TRUE;
g_main_loop_quit(m1);
return FALSE;
}
void clear_dump_directory()
{
GError *error= NULL;
char* dump_directory= g_strdup_printf("%s/%d", output_directory, dump_number);
GDir* dir= g_dir_open(dump_directory, 0, &error);
if (error) {
g_critical("cannot open directory %s, %s\n", dump_directory, error->message);
errors++;
return;
}
const gchar* filename= NULL;
while((filename= g_dir_read_name(dir))) {
gchar* path= g_build_filename(dump_directory, filename, NULL);
if (g_unlink(path) == -1) {
g_critical("error removing file %s (%d)\n", path, errno);
errors++;
return;
}
g_free(path);
}
g_dir_close(dir);
g_free(dump_directory);
}
gboolean run_snapshot(gpointer *data)
{
(void) data;
g_async_queue_push(start_scheduled_dump,GINT_TO_POINTER(1));
return (shutdown_triggered) ? FALSE : TRUE;
}
/* Check database.table string against regular expression */
gboolean check_regex(char *database, char *table) {
/* This is not going to be used in threads */
static pcre *re = NULL;
int rc;
int ovector[9]= {0};
const char *error;
int erroroffset;
char *p;
/* Let's compile the RE before we do anything */
if (!re) {
re = pcre_compile(regexstring,PCRE_CASELESS|PCRE_MULTILINE,&error,&erroroffset,NULL);
if(!re) {
g_critical("Regular expression fail: %s", error);
exit(EXIT_FAILURE);
}
}
p=g_strdup_printf("%s.%s",database,table);
rc = pcre_exec(re,NULL,p,strlen(p),0,0,ovector,9);
g_free(p);
return (rc>0)?TRUE:FALSE;
}
/* Write some stuff we know about snapshot, before it changes */
void write_snapshot_info(MYSQL *conn, FILE *file) {
MYSQL_RES *master=NULL, *slave=NULL, *mdb=NULL;
MYSQL_FIELD *fields;
MYSQL_ROW row;
char *masterlog=NULL;
char *masterpos=NULL;
char *mastergtid=NULL;
char *connname=NULL;
char *slavehost=NULL;
char *slavelog=NULL;
char *slavepos=NULL;
char *slavegtid=NULL;
guint isms;
guint i;
mysql_query(conn,"SHOW MASTER STATUS");
master=mysql_store_result(conn);
if (master && (row=mysql_fetch_row(master))) {
masterlog=row[0];
masterpos=row[1];
/* Oracle/Percona GTID */
if(mysql_num_fields(master) == 5) {
mastergtid=row[4];
} else {
/* Let's try with MariaDB 10.x */
/* Use gtid_binlog_pos due to issue with gtid_current_pos with galera cluster, gtid_binlog_pos works as well with normal mariadb server https://jira.mariadb.org/browse/MDEV-10279 */
mysql_query(conn, "SELECT @@gtid_binlog_pos");
mdb=mysql_store_result(conn);
if (mdb && (row=mysql_fetch_row(mdb))) {
mastergtid=row[0];
}
}
}
if (masterlog) {
fprintf(file, "SHOW MASTER STATUS:\n\tLog: %s\n\tPos: %s\n\tGTID:%s\n\n", masterlog, masterpos,mastergtid);
g_message("Written master status");
}
isms = 0;
mysql_query(conn,"SELECT @@default_master_connection");
MYSQL_RES *rest = mysql_store_result(conn);
if(rest != NULL && mysql_num_rows(rest)){
mysql_free_result(rest);
g_message("Multisource slave detected.");
isms = 1;
}
if (isms)
mysql_query(conn, "SHOW ALL SLAVES STATUS");
else
mysql_query(conn, "SHOW SLAVE STATUS");
slave=mysql_store_result(conn);
while (slave && (row=mysql_fetch_row(slave))) {
fields=mysql_fetch_fields(slave);
for (i=0; i<mysql_num_fields(slave);i++) {
if (isms && !strcasecmp("connection_name",fields[i].name))
connname=row[i];
if (!strcasecmp("exec_master_log_pos",fields[i].name)) {
slavepos=row[i];
} else if (!strcasecmp("relay_master_log_file", fields[i].name)) {
slavelog=row[i];
} else if (!strcasecmp("master_host",fields[i].name)) {
slavehost=row[i];
} else if (!strcasecmp("Executed_Gtid_Set",fields[i].name) || !strcasecmp("Gtid_Slave_Pos",fields[i].name)) {
slavegtid=row[i];
}
}
if (slavehost) {
fprintf(file, "SHOW SLAVE STATUS:");
if (isms)
fprintf(file, "\n\tConnection name: %s",connname);
fprintf(file, "\n\tHost: %s\n\tLog: %s\n\tPos: %s\n\tGTID:%s\n\n",slavehost, slavelog, slavepos,slavegtid);
g_message("Written slave status");
}
}
fflush(file);
if (master)
mysql_free_result(master);
if (slave)
mysql_free_result(slave);
if (mdb)
mysql_free_result(mdb);
}
void *process_queue(struct thread_data *td) {
struct configuration *conf= td->conf;
// mysql_init is not thread safe, especially in Connector/C
g_mutex_lock(init_mutex);
MYSQL *thrconn = mysql_init(NULL);
g_mutex_unlock(init_mutex);
if (defaults_file != NULL) {
mysql_options(thrconn,MYSQL_READ_DEFAULT_FILE,defaults_file);
}
mysql_options(thrconn,MYSQL_READ_DEFAULT_GROUP,"mydumper");
if (compress_protocol)
mysql_options(thrconn,MYSQL_OPT_COMPRESS,NULL);
if (!mysql_real_connect(thrconn, hostname, username, password, NULL, port, socket_path, 0)) {
g_critical("Failed to connect to database: %s", mysql_error(thrconn));
exit(EXIT_FAILURE);
} else {
g_message("Thread %d connected using MySQL connection ID %lu", td->thread_id, mysql_thread_id(thrconn));
}
if(use_savepoints && mysql_query(thrconn, "SET SQL_LOG_BIN = 0")){
g_critical("Failed to disable binlog for the thread: %s",mysql_error(thrconn));
exit(EXIT_FAILURE);
}
if ((detected_server == SERVER_TYPE_MYSQL) && mysql_query(thrconn, "SET SESSION wait_timeout = 2147483")){
g_warning("Failed to increase wait_timeout: %s", mysql_error(thrconn));
}
if (mysql_query(thrconn, "SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ")) {
g_critical("Failed to set isolation level: %s", mysql_error(thrconn));
exit(EXIT_FAILURE);
}
if (mysql_query(thrconn, "START TRANSACTION /*!40108 WITH CONSISTENT SNAPSHOT */")) {
g_critical("Failed to start consistent snapshot: %s",mysql_error(thrconn));
exit(EXIT_FAILURE);
}
if(!skip_tz && mysql_query(thrconn, "/*!40103 SET TIME_ZONE='+00:00' */")){
g_critical("Failed to set time zone: %s",mysql_error(thrconn));
}
/* Unfortunately version before 4.1.8 did not support consistent snapshot transaction starts, so we cheat */
if (need_dummy_read) {
mysql_query(thrconn,"SELECT /*!40001 SQL_NO_CACHE */ * FROM mysql.mydumperdummy");
MYSQL_RES *res=mysql_store_result(thrconn);
if (res)
mysql_free_result(res);
}
if(need_dummy_toku_read){
mysql_query(thrconn,"SELECT /*!40001 SQL_NO_CACHE */ * FROM mysql.tokudbdummy");
MYSQL_RES *res=mysql_store_result(thrconn);
if (res)
mysql_free_result(res);
}
mysql_query(thrconn, "/*!40101 SET NAMES binary*/");
g_async_queue_push(conf->ready,GINT_TO_POINTER(1));
struct job* job= NULL;
struct table_job* tj= NULL;
struct schema_job* sj= NULL;
struct view_job* vj= NULL;
struct schema_post_job* sp= NULL;
#ifdef WITH_BINLOG
struct binlog_job* bj= NULL;
#endif
/* if less locking we need to wait until that threads finish
progressively waking up these threads */
if(less_locking){
g_mutex_lock(ll_mutex);
while (less_locking_threads >= td->thread_id) {
g_cond_wait (ll_cond, ll_mutex);
}
g_mutex_unlock(ll_mutex);
}
for(;;) {
GTimeVal tv;
g_get_current_time(&tv);
g_time_val_add(&tv,1000*1000*1);
job=(struct job *)g_async_queue_pop(conf->queue);
if (shutdown_triggered && (job->type != JOB_SHUTDOWN)) {
continue;
}
switch (job->type) {
case JOB_DUMP:
tj=(struct table_job *)job->job_data;
if (tj->where)
g_message("Thread %d dumping data for `%s`.`%s` where %s", td->thread_id, tj->database, tj->table, tj->where);
else
g_message("Thread %d dumping data for `%s`.`%s`", td->thread_id, tj->database, tj->table);
if(use_savepoints && mysql_query(thrconn, "SAVEPOINT mydumper")){
g_critical("Savepoint failed: %s",mysql_error(thrconn));
}
dump_table_data_file(thrconn, tj->database, tj->table, tj->where, tj->filename);
if(use_savepoints && mysql_query(thrconn, "ROLLBACK TO SAVEPOINT mydumper")){
g_critical("Rollback to savepoint failed: %s",mysql_error(thrconn));
}
if(tj->database) g_free(tj->database);
if(tj->table) g_free(tj->table);
if(tj->where) g_free(tj->where);
if(tj->filename) g_free(tj->filename);
g_free(tj);
g_free(job);
break;
case JOB_DUMP_NON_INNODB:
tj=(struct table_job *)job->job_data;
if (tj->where)
g_message("Thread %d dumping data for `%s`.`%s` where %s", td->thread_id, tj->database, tj->table, tj->where);
else
g_message("Thread %d dumping data for `%s`.`%s`", td->thread_id, tj->database, tj->table);
if(use_savepoints && mysql_query(thrconn, "SAVEPOINT mydumper")){
g_critical("Savepoint failed: %s",mysql_error(thrconn));
}
dump_table_data_file(thrconn, tj->database, tj->table, tj->where, tj->filename);
if(use_savepoints && mysql_query(thrconn, "ROLLBACK TO SAVEPOINT mydumper")){
g_critical("Rollback to savepoint failed: %s",mysql_error(thrconn));
}
if(tj->database) g_free(tj->database);
if(tj->table) g_free(tj->table);
if(tj->where) g_free(tj->where);
if(tj->filename) g_free(tj->filename);
g_free(tj);
g_free(job);
if (g_atomic_int_dec_and_test(&non_innodb_table_counter) && g_atomic_int_get(&non_innodb_done)) {
g_async_queue_push(conf->unlock_tables, GINT_TO_POINTER(1));
}
break;
case JOB_SCHEMA:
sj=(struct schema_job *)job->job_data;
g_message("Thread %d dumping schema for `%s`.`%s`", td->thread_id, sj->database, sj->table);
dump_schema_data(thrconn, sj->database, sj->table, sj->filename);
if(sj->database) g_free(sj->database);
if(sj->table) g_free(sj->table);
if(sj->filename) g_free(sj->filename);
g_free(sj);
g_free(job);
break;
case JOB_VIEW:
vj=(struct view_job *)job->job_data;
g_message("Thread %d dumping view for `%s`.`%s`", td->thread_id, vj->database, vj->table);
dump_view_data(thrconn, vj->database, vj->table, vj->filename, vj->filename2);
if(vj->database) g_free(vj->database);
if(vj->table) g_free(vj->table);
if(vj->filename) g_free(vj->filename);
if(vj->filename2) g_free(vj->filename2);
g_free(vj);
g_free(job);
break;
case JOB_TRIGGERS:
sj=(struct schema_job *)job->job_data;
g_message("Thread %d dumping triggers for `%s`.`%s`", td->thread_id, sj->database, sj->table);
dump_triggers_data(thrconn, sj->database, sj->table, sj->filename);
if(sj->database) g_free(sj->database);
if(sj->table) g_free(sj->table);
if(sj->filename) g_free(sj->filename);
g_free(sj);
g_free(job);
break;
case JOB_SCHEMA_POST:
sp=(struct schema_post_job *)job->job_data;
g_message("Thread %d dumping SP and VIEWs for `%s`", td->thread_id, sp->database);
dump_schema_post_data(thrconn, sp->database, sp->filename);
if(sp->database) g_free(sp->database);
if(sp->filename) g_free(sp->filename);
g_free(sp);
g_free(job);
break;
#ifdef WITH_BINLOG
case JOB_BINLOG:
thrconn= reconnect_for_binlog(thrconn);
g_message("Thread %d connected using MySQL connection ID %lu (in binlog mode)", td->thread_id, mysql_thread_id(thrconn));
bj=(struct binlog_job *)job->job_data;
g_message("Thread %d dumping binary log file %s", td->thread_id, bj->filename);
get_binlog_file(thrconn, bj->filename, binlog_directory, bj->start_position, bj->stop_position, FALSE);
if(bj->filename)
g_free(bj->filename);
g_free(bj);
g_free(job);
break;
#endif
case JOB_SHUTDOWN:
g_message("Thread %d shutting down", td->thread_id);
if (thrconn)
mysql_close(thrconn);
g_free(job);
mysql_thread_end();
return NULL;
break;
default:
g_critical("Something very bad happened!");
exit(EXIT_FAILURE);
}
}
if (thrconn)
mysql_close(thrconn);
mysql_thread_end();
return NULL;
}
void *process_queue_less_locking(struct thread_data *td) {
struct configuration *conf= td->conf;
// mysql_init is not thread safe, especially in Connector/C
g_mutex_lock(init_mutex);
MYSQL *thrconn = mysql_init(NULL);
g_mutex_unlock(init_mutex);
if (defaults_file != NULL) {
mysql_options(thrconn,MYSQL_READ_DEFAULT_FILE,defaults_file);
}
mysql_options(thrconn,MYSQL_READ_DEFAULT_GROUP,"mydumper");
if (compress_protocol)
mysql_options(thrconn,MYSQL_OPT_COMPRESS,NULL);
if (!mysql_real_connect(thrconn, hostname, username, password, NULL, port, socket_path, 0)) {
g_critical("Failed to connect to database: %s", mysql_error(thrconn));
exit(EXIT_FAILURE);
} else {
g_message("Thread %d connected using MySQL connection ID %lu", td->thread_id, mysql_thread_id(thrconn));
}
if ((detected_server == SERVER_TYPE_MYSQL) && mysql_query(thrconn, "SET SESSION wait_timeout = 2147483")){
g_warning("Failed to increase wait_timeout: %s", mysql_error(thrconn));
}
if(!skip_tz && mysql_query(thrconn, "/*!40103 SET TIME_ZONE='+00:00' */")){
g_critical("Failed to set time zone: %s",mysql_error(thrconn));
}
mysql_query(thrconn, "/*!40101 SET NAMES binary*/");
g_async_queue_push(conf->ready_less_locking,GINT_TO_POINTER(1));
struct job* job= NULL;
struct table_job* tj= NULL;
struct tables_job* mj=NULL;
struct schema_job* sj= NULL;
struct view_job* vj= NULL;
struct schema_post_job* sp= NULL;
#ifdef WITH_BINLOG
struct binlog_job* bj= NULL;
#endif
GList* glj;
int first = 1;
GString *query= g_string_sized_new(1024);
GString *prev_table = g_string_sized_new(100);
GString *prev_database = g_string_sized_new(100);
for(;;) {
GTimeVal tv;
g_get_current_time(&tv);
g_time_val_add(&tv,1000*1000*1);
job=(struct job *)g_async_queue_pop(conf->queue_less_locking);
if (shutdown_triggered && (job->type != JOB_SHUTDOWN)) {
continue;
}
switch (job->type) {
case JOB_LOCK_DUMP_NON_INNODB:
mj=(struct tables_job *)job->job_data;
glj = g_list_copy(mj->table_job_list);
for (glj= g_list_first(glj); glj; glj= g_list_next(glj)) {
tj = (struct table_job *)glj->data;
if(first){
g_string_printf(query, "LOCK TABLES `%s`.`%s` READ LOCAL",tj->database,tj->table);
first = 0;
}else{
if(g_ascii_strcasecmp(prev_database->str, tj->database) || g_ascii_strcasecmp(prev_table->str, tj->table)){
g_string_append_printf(query, ", `%s`.`%s` READ LOCAL",tj->database,tj->table);
}
}
g_string_printf(prev_table, "%s", tj->table);
g_string_printf(prev_database, "%s", tj->database);
}
first = 1;
if(mysql_query(thrconn,query->str)){
g_critical("Non Innodb lock tables fail: %s", mysql_error(thrconn));
exit(EXIT_FAILURE);
}
if (g_atomic_int_dec_and_test(&non_innodb_table_counter) && g_atomic_int_get(&non_innodb_done)) {
g_async_queue_push(conf->unlock_tables, GINT_TO_POINTER(1));
}
for (mj->table_job_list= g_list_first(mj->table_job_list); mj->table_job_list; mj->table_job_list= g_list_next(mj->table_job_list)) {
tj = (struct table_job *)mj->table_job_list->data;
if (tj->where)
g_message("Thread %d dumping data for `%s`.`%s` where %s", td->thread_id, tj->database, tj->table, tj->where);
else
g_message("Thread %d dumping data for `%s`.`%s`", td->thread_id, tj->database, tj->table);
dump_table_data_file(thrconn, tj->database, tj->table, tj->where, tj->filename);
if(tj->database) g_free(tj->database);
if(tj->table) g_free(tj->table);
if(tj->where) g_free(tj->where);
if(tj->filename) g_free(tj->filename);
g_free(tj);
}
mysql_query(thrconn, "UNLOCK TABLES /* Non Innodb */");
g_free(g_list_first(mj->table_job_list));
g_free(mj);
g_free(job);
break;
case JOB_SCHEMA:
sj=(struct schema_job *)job->job_data;
g_message("Thread %d dumping schema for `%s`.`%s`", td->thread_id, sj->database, sj->table);
dump_schema_data(thrconn, sj->database, sj->table, sj->filename);
if(sj->database) g_free(sj->database);
if(sj->table) g_free(sj->table);
if(sj->filename) g_free(sj->filename);
g_free(sj);
g_free(job);
break;
case JOB_VIEW:
vj=(struct view_job *)job->job_data;
g_message("Thread %d dumping view for `%s`.`%s`", td->thread_id, sj->database, sj->table);
dump_view_data(thrconn, vj->database, vj->table, vj->filename, vj->filename2);
if(vj->database) g_free(vj->database);
if(vj->table) g_free(vj->table);
if(vj->filename) g_free(vj->filename);
if(vj->filename2) g_free(vj->filename2);
g_free(vj);
g_free(job);
break;
case JOB_TRIGGERS:
sj=(struct schema_job *)job->job_data;
g_message("Thread %d dumping triggers for `%s`.`%s`", td->thread_id, sj->database, sj->table);
dump_triggers_data(thrconn, sj->database, sj->table, sj->filename);
if(sj->database) g_free(sj->database);
if(sj->table) g_free(sj->table);
if(sj->filename) g_free(sj->filename);
g_free(sj);
g_free(job);
break;
case JOB_SCHEMA_POST:
sp=(struct schema_post_job *)job->job_data;
g_message("Thread %d dumping SP and VIEWs for `%s`", td->thread_id, sp->database);
dump_schema_post_data(thrconn, sp->database, sp->filename);
if(sp->database) g_free(sp->database);
if(sp->filename) g_free(sp->filename);
g_free(sp);
g_free(job);
break;
#ifdef WITH_BINLOG
case JOB_BINLOG:
thrconn= reconnect_for_binlog(thrconn);
g_message("Thread %d connected using MySQL connection ID %lu (in binlog mode)", td->thread_id, mysql_thread_id(thrconn));
bj=(struct binlog_job *)job->job_data;
g_message("Thread %d dumping binary log file %s", td->thread_id, bj->filename);
get_binlog_file(thrconn, bj->filename, binlog_directory, bj->start_position, bj->stop_position, FALSE);
if(bj->filename)
g_free(bj->filename);
g_free(bj);
g_free(job);
break;
#endif
case JOB_SHUTDOWN:
g_message("Thread %d shutting down", td->thread_id);
g_mutex_lock(ll_mutex);
less_locking_threads--;
g_cond_broadcast(ll_cond);
g_mutex_unlock(ll_mutex);
if (thrconn)
mysql_close(thrconn);
g_free(job);
mysql_thread_end();
return NULL;
break;
default:
g_critical("Something very bad happened!");
exit(EXIT_FAILURE);
}
}
if (thrconn)
mysql_close(thrconn);
mysql_thread_end();
return NULL;
}
#ifdef WITH_BINLOG
MYSQL *reconnect_for_binlog(MYSQL *thrconn) {
if (thrconn) {
mysql_close(thrconn);
}
g_mutex_lock(init_mutex);
thrconn= mysql_init(NULL);
g_mutex_unlock(init_mutex);
if (compress_protocol)
mysql_options(thrconn,MYSQL_OPT_COMPRESS,NULL);
int timeout= 1;
mysql_options(thrconn, MYSQL_OPT_READ_TIMEOUT, (const char*)&timeout);
if (!mysql_real_connect(thrconn, hostname, username, password, NULL, port, socket_path, 0)) {
g_critical("Failed to re-connect to database: %s", mysql_error(thrconn));
exit(EXIT_FAILURE);
}
return thrconn;
}
#endif
int main(int argc, char *argv[])
{
GError *error = NULL;
GOptionContext *context;
g_thread_init(NULL);
init_mutex = g_mutex_new();
ll_mutex = g_mutex_new();
ll_cond = g_cond_new();
context = g_option_context_new("multi-threaded MySQL dumping");
GOptionGroup *main_group= g_option_group_new("main", "Main Options", "Main Options", NULL, NULL);
g_option_group_add_entries(main_group, entries);
g_option_group_add_entries(main_group, common_entries);
g_option_context_set_main_group(context, main_group);
if (!g_option_context_parse(context, &argc, &argv, &error)) {
g_print ("option parsing failed: %s, try --help\n", error->message);
exit (EXIT_FAILURE);
}
g_option_context_free(context);
if (program_version) {
g_print("mydumper %s, built against MySQL %s\n", VERSION, MYSQL_SERVER_VERSION);
exit (EXIT_SUCCESS);
}
set_verbose(verbose);
time_t t;
time(&t);localtime_r(&t,&tval);
//rows chunks have precedence over chunk_filesize
if (rows_per_file > 0 && chunk_filesize > 0){
chunk_filesize = 0;
g_warning("--chunk-filesize disabled by --rows option");
}
//until we have an unique option on lock types we need to ensure this
if(no_locks || trx_consistency_only)
less_locking = 0;
/* savepoints workaround to avoid metadata locking issues
doesnt work for chuncks */
if(rows_per_file && use_savepoints){
use_savepoints = FALSE;
g_warning("--use-savepoints disabled by --rows");
}
//clarify binlog coordinates with trx_consistency_only
if(trx_consistency_only)
g_warning("Using trx_consistency_only, binlog coordinates will not be accurate if you are writing to non transactional tables.");
if (!output_directory)
output_directory = g_strdup_printf("%s-%04d%02d%02d-%02d%02d%02d",DIRECTORY,
tval.tm_year+1900, tval.tm_mon+1, tval.tm_mday,
tval.tm_hour, tval.tm_min, tval.tm_sec);
create_backup_dir(output_directory);
if (daemon_mode) {
pid_t pid, sid;
pid= fork();
if (pid < 0)
exit(EXIT_FAILURE);
else if (pid > 0)
exit(EXIT_SUCCESS);
umask(0);
sid= setsid();
if (sid < 0)
exit(EXIT_FAILURE);
char *dump_directory= g_strdup_printf("%s/0", output_directory);
create_backup_dir(dump_directory);
g_free(dump_directory);
dump_directory= g_strdup_printf("%s/1", output_directory);
create_backup_dir(dump_directory);
g_free(dump_directory);
#ifdef WITH_BINLOG
daemon_binlog_directory= g_strdup_printf("%s/%s", output_directory, DAEMON_BINLOGS);
create_backup_dir(daemon_binlog_directory);
#endif
}
#ifdef WITH_BINLOG
if (need_binlogs) {
binlog_directory = g_strdup_printf("%s/%s", output_directory, BINLOG_DIRECTORY);
create_backup_dir(binlog_directory);
}
#endif
/* Give ourselves an array of engines to ignore */
if (ignore_engines)
ignore = g_strsplit(ignore_engines, ",", 0);
/* Give ourselves an array of tables to dump */
if (tables_list)
tables = g_strsplit(tables_list, ",", 0);
if (daemon_mode) {
GError* terror;
#ifdef WITH_BINLOG
GThread *bthread= g_thread_create(binlog_thread, GINT_TO_POINTER(1), FALSE, &terror);
if (bthread == NULL) {
g_critical("Could not create binlog thread: %s", terror->message);
g_error_free(terror);
exit(EXIT_FAILURE);
}
#endif
start_scheduled_dump= g_async_queue_new();
GThread *ethread= g_thread_create(exec_thread, GINT_TO_POINTER(1), FALSE, &terror);
if (ethread == NULL) {
g_critical("Could not create exec thread: %s", terror->message);
g_error_free(terror);
exit(EXIT_FAILURE);
}
// Run initial snapshot
run_snapshot(NULL);
#if GLIB_MINOR_VERSION < 14
g_timeout_add(snapshot_interval*60*1000, (GSourceFunc) run_snapshot, NULL);
#else
g_timeout_add_seconds(snapshot_interval*60, (GSourceFunc) run_snapshot, NULL);
#endif
guint sigsource= g_unix_signal_add(SIGINT, sig_triggered, NULL);
sigsource= g_unix_signal_add(SIGTERM, sig_triggered, NULL);
m1= g_main_loop_new(NULL, TRUE);
g_main_loop_run(m1);
g_source_remove(sigsource);
} else {
MYSQL *conn= create_main_connection();
start_dump(conn);
}
//sleep(5);
mysql_thread_end();
mysql_library_end();
g_free(output_directory);
g_strfreev(ignore);
g_strfreev(tables);
if (logoutfile) {
fclose(logoutfile);
}
exit(errors ? EXIT_FAILURE : EXIT_SUCCESS);
}
MYSQL *create_main_connection()
{
MYSQL *conn;
conn = mysql_init(NULL);
if (defaults_file != NULL) {
mysql_options(conn,MYSQL_READ_DEFAULT_FILE,defaults_file);
}
mysql_options(conn,MYSQL_READ_DEFAULT_GROUP,"mydumper");
if (!mysql_real_connect(conn, hostname, username, password, db, port, socket_path, 0)) {
g_critical("Error connecting to database: %s", mysql_error(conn));
exit(EXIT_FAILURE);
}
detected_server= detect_server(conn);
if ((detected_server == SERVER_TYPE_MYSQL) && mysql_query(conn, "SET SESSION wait_timeout = 2147483")){
g_warning("Failed to increase wait_timeout: %s", mysql_error(conn));
}
if ((detected_server == SERVER_TYPE_MYSQL) && mysql_query(conn, "SET SESSION net_write_timeout = 2147483")){
g_warning("Failed to increase net_write_timeout: %s", mysql_error(conn));
}
switch (detected_server) {
case SERVER_TYPE_MYSQL:
g_message("Connected to a MySQL server");
break;
case SERVER_TYPE_DRIZZLE:
g_message("Connected to a Drizzle server");
break;
default:
g_critical("Cannot detect server type");
exit(EXIT_FAILURE);
break;
}
return conn;
}
void *exec_thread(void *data) {
(void) data;
while(1) {
g_async_queue_pop(start_scheduled_dump);
clear_dump_directory();
MYSQL *conn= create_main_connection();
start_dump(conn);