MySQL group replication Configuration Steps of Recommendation

MySQL-Group-Replication is a new feature developed in mysql-5. 7.17; It achieves strong uniformity between master-slave,

But at present, the main reason is that the performance is not very good.

"1" Determines that the current mysql database version is 5.7. 17 and above

/usr/local/mysql/bin/mysqld --version
/usr/local/mysql/bin/mysqld Ver 5.7.17 for linux-glibc2.5 on x86_64 (MySQL Community Server (GPL))

The "2" experimental environment consists of three mysql installed on a host computer, which form an group-replication group

/tmp/4406. cnf reads as follows:

[mysqld]
####: for global
user          =jianglexing          #  mysql
basedir          =/usr/local/mysql        #  /usr/local/mysql/
datadir          =/tmp/4406/          #  /usr/local/mysql/data
server_id        =4406            #  0
port          =4406            #  3306
socket          =/tmp/4406/mysql.sock        #  /tmp/mysql.sock
auto_increment_increment    =1            #  1
auto_increment_offset      =1            #  1
lower_case_table_names      =1            #  0
secure_file_priv      =            #  null


####: for binlog
binlog_format        =row            #  row
log_bin          =mysql-bin          #  off
binlog_rows_query_log_events    =on            #  off
log_slave_updates      =on            #  off
expire_logs_days      =4            #  0
binlog_cache_size      =32768            #  32768(32k)
binlog_checksum        =none            #  CRC32
sync_binlog        =1            #  1


####: for error-log
log_error        =mysql-err.log          #  /usr/local/mysql/data/localhost.localdomain.err


####: for slow query log


####: for gtid
gtid_mode        =on            #  off
enforce_gtid_consistency    =on            #  off


####: for replication
master_info_repository      =table            #  file
relay_log_info_repository    =table            #  file


####: for group replication
transaction_write_set_extraction  =XXHASH64          #  off
loose-group_replication_group_name  ="aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa"    #  
loose-group_replication_start_on_boot  =off            #  off
loose-group_replication_local_address  ="127.0.0.1:24901"        #
loose-group_replication_group_seeds  ="127.0.0.1:24901,127.0.0.1:24902,127.0.0.1:24903"
loose-group_replication_bootstrap_group  =off            #  off


####: for innodb
default_storage_engine      =innodb            #  innodb
default_tmp_storage_engine    =innodb            #  innodb
innodb_data_file_path      =ibdata1:12M:autoextend        #  ibdata1:12M:autoextend
innodb_temp_data_file_path    =ibtmp1:12M:autoextend        #  ibtmp1:12M:autoextend
innodb_log_group_home_dir    =./            #  ./
innodb_log_files_in_group    =2            #  2
innodb_log_file_size      =48M            #  50331648(48M)
innodb_file_format      =Barracuda          #  Barracuda
innodb_file_per_table      =on             #  on
innodb_page_size      =16k            #  16384(16k)
innodb_thread_concurrency    =0            #  0
innodb_read_io_threads      =4            #  4
innodb_write_io_threads      =4            #  4
innodb_purge_threads      =4            #  4
innodb_print_all_deadlocks    =on            #  off
innodb_deadlock_detect      =on            #  on
innodb_lock_wait_timeout    =50            #  50
innodb_spin_wait_delay      =6            #  6
innodb_autoinc_lock_mode    =2            #  1
innodb_stats_persistent      =on            #  on
innodb_stats_persistent_sample_pages  =20            #  20
innodb_adaptive_hash_index    =on            #  on
innodb_change_buffering      =all            #  all
innodb_change_buffer_max_size    =25            #  25
innodb_flush_neighbors      =1            #  1
innodb_flush_method      =O_DIRECT          #  
innodb_doublewrite      =on            #  on
innodb_log_buffer_size      =16M            #  16777216(16M)
innodb_flush_log_at_timeout    =1            #  1
innodb_flush_log_at_trx_commit    =1            #  1
autocommit        =1            #  1

[client]
auto-rehash

/tmp/5506. cnf reads as follows:

[mysqld]
####: for global
user          =jianglexing          #  mysql
basedir          =/usr/local/mysql        #  /usr/local/mysql/
datadir          =/tmp/5506        #  /usr/local/mysql/data
server_id        =5506            #  0
port          =5506            #  3306
socket          =/tmp/5506/mysql.sock        #  /tmp/mysql.sock
auto_increment_increment    =1            #  1
auto_increment_offset      =1            #  1
lower_case_table_names      =1            #  0
secure_file_priv      =            #  null


####: for binlog
binlog_format        =row            #  row
log_bin          =mysql-bin          #  off
binlog_rows_query_log_events    =on            #  off
log_slave_updates      =on            #  off
expire_logs_days      =4            #  0
binlog_cache_size      =32768            #  32768(32k)
binlog_checksum        =none            #  CRC32
sync_binlog        =1            #  1


####: for error-log
log_error        =mysql-err.log          #  /usr/local/mysql/data/localhost.localdomain.err


####: for slow query log


####: for gtid
gtid_mode        =on            #  off
enforce_gtid_consistency    =on            #  off


####: for replication
master_info_repository      =table            #  file
relay_log_info_repository    =table            #  file


####: for group replication
transaction_write_set_extraction  =XXHASH64          #  off
loose-group_replication_group_name  ="aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa"    #  
loose-group_replication_start_on_boot  =off            #  off
loose-group_replication_local_address  ="127.0.0.1:24902"        #
loose-group_replication_group_seeds  ="127.0.0.1:24901,127.0.0.1:24902,127.0.0.1:24903"
loose-group_replication_bootstrap_group  =off            #  off


####: for innodb
default_storage_engine      =innodb            #  innodb
default_tmp_storage_engine    =innodb            #  innodb
innodb_data_file_path      =ibdata1:12M:autoextend        #  ibdata1:12M:autoextend
innodb_temp_data_file_path    =ibtmp1:12M:autoextend        #  ibtmp1:12M:autoextend
innodb_log_group_home_dir    =./            #  ./
innodb_log_files_in_group    =2            #  2
innodb_log_file_size      =48M            #  50331648(48M)
innodb_file_format      =Barracuda          #  Barracuda
innodb_file_per_table      =on             #  on
innodb_page_size      =16k            #  16384(16k)
innodb_thread_concurrency    =0            #  0
innodb_read_io_threads      =4            #  4
innodb_write_io_threads      =4            #  4
innodb_purge_threads      =4            #  4
innodb_print_all_deadlocks    =on            #  off
innodb_deadlock_detect      =on            #  on
innodb_lock_wait_timeout    =50            #  50
innodb_spin_wait_delay      =6            #  6
innodb_autoinc_lock_mode    =2            #  1
innodb_stats_persistent      =on            #  on
innodb_stats_persistent_sample_pages  =20            #  20
innodb_adaptive_hash_index    =on            #  on
innodb_change_buffering      =all            #  all
innodb_change_buffer_max_size    =25            #  25
innodb_flush_neighbors      =1            #  1
innodb_flush_method      =O_DIRECT          #  
innodb_doublewrite      =on            #  on
innodb_log_buffer_size      =16M            #  16777216(16M)
innodb_flush_log_at_timeout    =1            #  1
innodb_flush_log_at_trx_commit    =1            #  1
autocommit        =1            #  1

/tmp/6606. cnf reads as follows:

[mysqld]
####: for global
user          =jianglexing          #  mysql
basedir          =/usr/local/mysql        #  /usr/local/mysql/
datadir          =/tmp/6606/        #  /usr/local/mysql/data
server_id        =6606            #  0
port          =6606            #  3306
socket          =/tmp/6606/mysql.sock        #  /tmp/mysql.sock
auto_increment_increment    =1            #  1
auto_increment_offset      =1            #  1
lower_case_table_names      =1            #  0
secure_file_priv      =            #  null


####: for binlog
binlog_format        =row            #  row
log_bin          =mysql-bin          #  off
binlog_rows_query_log_events    =on            #  off
log_slave_updates      =on            #  off
expire_logs_days      =4            #  0
binlog_cache_size      =32768            #  32768(32k)
binlog_checksum        =none            #  CRC32
sync_binlog        =1            #  1


####: for error-log
log_error        =mysql-err.log          #  /usr/local/mysql/data/localhost.localdomain.err


####: for slow query log


####: for gtid
gtid_mode        =on            #  off
enforce_gtid_consistency    =on            #  off


####: for replication
master_info_repository      =table            #  file
relay_log_info_repository    =table            #  file


####: for group replication
transaction_write_set_extraction  =XXHASH64          #  off
loose-group_replication_group_name  ="aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa"    #  
loose-group_replication_start_on_boot  =off            #  off
loose-group_replication_local_address  ="127.0.0.1:24903"        #
loose-group_replication_group_seeds  ="127.0.0.1:24901,127.0.0.1:24902,127.0.0.1:24903"
loose-group_replication_bootstrap_group  =off            #  off


####: for innodb
default_storage_engine      =innodb            #  innodb
default_tmp_storage_engine    =innodb            #  innodb
innodb_data_file_path      =ibdata1:12M:autoextend        #  ibdata1:12M:autoextend
innodb_temp_data_file_path    =ibtmp1:12M:autoextend        #  ibtmp1:12M:autoextend
innodb_log_group_home_dir    =./            #  ./
innodb_log_files_in_group    =2            #  2
innodb_log_file_size      =48M            #  50331648(48M)
innodb_file_format      =Barracuda          #  Barracuda
innodb_file_per_table      =on             #  on
innodb_page_size      =16k            #  16384(16k)
innodb_thread_concurrency    =0            #  0
innodb_read_io_threads      =4            #  4
innodb_write_io_threads      =4            #  4
innodb_purge_threads      =4            #  4
innodb_print_all_deadlocks    =on            #  off
innodb_deadlock_detect      =on            #  on
innodb_lock_wait_timeout    =50            #  50
innodb_spin_wait_delay      =6            #  6
innodb_autoinc_lock_mode    =2            #  1
innodb_stats_persistent      =on            #  on
innodb_stats_persistent_sample_pages  =20            #  20
innodb_adaptive_hash_index    =on            #  on
innodb_change_buffering      =all            #  all
innodb_change_buffer_max_size    =25            #  25
innodb_flush_neighbors      =1            #  1
innodb_flush_method      =O_DIRECT          #  
innodb_doublewrite      =on            #  on
innodb_log_buffer_size      =16M            #  16777216(16M)
innodb_flush_log_at_timeout    =1            #  1
innodb_flush_log_at_trx_commit    =1            #  1
autocommit        =1            #  1

"3" Initializes 3 database instances

cd /usr/local/mysql/
./bin/mysqld --defautls-file=/tmp/4406.cnf --datadir=/tmp/4406 --initialize-insecrue

./bin/mysqld --defautls-file=/tmp/5506.cnf --datadir=/tmp/5506 --initialize-insecrue

./bin/mysqld --defautls-file=/tmp/6606.cnf --datadir=/tmp/6606 --initialize-insecrue

"4" Configure the initial instance of group-replication

/usr/local/mysql/bin/mysqld --defaults-file=/tmp/4406.cnf &

mysql -h127.0.0.1 -uroot -P4406

--  Add users 
    set sql_log_bin=0;
    create user rpl_user@'%' identified by '123456';
    grant replication slave,replication client on *.* to rpl_user@'%';
    create user rpl_user@'127.0.0.1' identified by '123456';
    grant replication slave,replication client on *.* to rpl_user@'127.0.0.1';
    create user rpl_user@'localhost' identified by '123456';
    grant replication slave,replication client on *.* to rpl_user@'localhost';
    set sql_log_bin=1;

--  Add copy credentials 
    change master to 
      master_user='rpl_user',
      master_password='123456'
      for channel 'group_replication_recovery';

--  Install Group Copy Objects 
    install plugin group_replication soname 'group_replication.so';

--  Start group replication 
    set global group_replication_bootstrap_group=on;
    start group_replication;
    set global group_replication_bootstrap_group=off;

The configuration process for the "5" 5506 instance is as follows:

/usr/local/mysql/bin/mysqld --defaults-file=/tmp/5506.cnf &

mysql -h127.0.0.1 -uroot -P5506

--  Add users 
    set sql_log_bin=0;
    create user rpl_user@'%' identified by '123456';
    grant replication slave,replication client on *.* to rpl_user@'%';
    create user rpl_user@'127.0.0.1' identified by '123456';
    grant replication slave,replication client on *.* to rpl_user@'127.0.0.1';
    create user rpl_user@'localhost' identified by '123456';
    grant replication slave,replication client on *.* to rpl_user@'localhost';
    set sql_log_bin=1;

--  Add copy credentials 
    change master to 
      master_user='rpl_user',
      master_password='123456'
      for channel 'group_replication_recovery';

--  Install Group Copy Objects 
    install plugin group_replication soname 'group_replication.so';

--  Start group replication 
    start group_replication; #  Note that this is not initialized, just join it 

The operation of the "6" 6606 instance is identical to the operation of 5506, so that the configuration of group replication is complete.