Jekyll2026-01-17T23:31:00+02:00https://barucho.github.io/feed.xmlBaruch Assif | SELECT * FROM DUALpersonal blogBaruch Assif (Osoveskiy)בינה מלאכותית לילדים2018-01-07T00:00:00+02:002018-01-07T00:00:00+02:00https://barucho.github.io/posts/ai/AI-for-kids

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 ✏️
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]]>Baruch Assif (Osoveskiy)MySQL InnoDB Cluster2018-01-07T00:00:00+02:002018-01-07T00:00:00+02:00https://barucho.github.io/posts/mysql/MySQL-InnoDB-ClusterThis Post is about MySQL InnoDB Cluser (not MySQL Cluser NDB)

MySQL InnoDB Cluser is based on MySQL group replication and by Joining at least three servers ensures a high availability cluster.

So How its works ?

MySQL InnoDB cluster is a collection of products that work together to provide a complete High Availability solution for MySQL. A group of MySQL servers can be configured to create a cluster using MySQL Shell. In the default single-primary mode, the cluster of servers has a single read-write primary. Multiple secondary servers are replicas of the primary. Creating a cluster with at least three servers ensures a high availability cluster. A client application is connected to the primary via MySQL Router. If the primary fails, a secondary is automatically promoted to the role of primary, and MySQL Router routes requests to the new primary. Advanced users can also configure a cluster to have multiple-primaries.

befor we bagin

  • use MySQL 5.7.19+
  • we need a minimum of 3 nodes to prevent Split-brain
  • we will need the group_replication plugin to see if you the the plugin installed :
SHOW PLUGINS;
| group_replication          | ACTIVE   | GROUP REPLICATION  | group_replication.so | GPL     |
  • to install
INSTALL PLUGIN group_replication SONAME 'group_replication.so';

lets configure 3 nodes one master … i will created the 3 nodes on the same machine by using diffrent data dir and port numbers

first create directories

mkdir -p /u01/data/mysql_group1/{1,2,3}
mkdir -p /u01/etc/{1,2,3}

initialize mysql metadata the –initialize-insecure flage will create root user witout passowrd.

mysqld --initialize-insecure  --datadir=/u01/data/mysql_group1/1
mysqld --initialize-insecure  --datadir=/u01/data/mysql_group1/2
mysqld --initialize-insecure  --datadir=/u01/data/mysql_group1/3

the my.cnf for all 3 nodes create the relevnt config file in /u01/etc/{1,2,3}

####mysql1
[mysqld]

# server configuration
datadir=/u01/data/mysql_group1/1

port=24801
socket=/u01/data/mysql_group1/1/s1.sock
## REPLICATION
server_id=1
gtid_mode=ON
enforce_gtid_consistency=ON
master_info_repository=TABLE
relay_log_info_repository=TABLE
binlog_checksum=NONE
log_slave_updates=ON
log_bin=binlog
binlog_format=ROW
## group REPLICATION
transaction_write_set_extraction=XXHASH64
loose-group_replication_group_name="aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa"
loose-group_replication_start_on_boot=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
loose-group_replication_single_primary_mode=FALSE
loose-group_replication_enforce_update_everywhere_checks= TRUE


######mysql2
[mysqld]

# server configuration
datadir=/u01/data/mysql_group1/2

port=24802
socket=/u01/data/mysql_group1/2/s2.sock
## REPLICATION
server_id=2
gtid_mode=ON
enforce_gtid_consistency=ON
master_info_repository=TABLE
relay_log_info_repository=TABLE
binlog_checksum=NONE
log_slave_updates=ON
log_bin=binlog
binlog_format=ROW
## group REPLICATION
transaction_write_set_extraction=XXHASH64
loose-group_replication_group_name="aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa"
loose-group_replication_start_on_boot=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
loose-group_replication_single_primary_mode=FALSE
loose-group_replication_enforce_update_everywhere_checks= TRUE



####mysql3
[mysqld]

# server configuration
datadir=/u01/data/mysql_group1/3

port=24803
socket=/u01/data/mysql_group1/3/s3.sock
## REPLICATION
server_id=3
gtid_mode=ON
enforce_gtid_consistency=ON
master_info_repository=TABLE
relay_log_info_repository=TABLE
binlog_checksum=NONE
log_slave_updates=ON
log_bin=binlog
binlog_format=ROW
## group REPLICATION
transaction_write_set_extraction=XXHASH64
loose-group_replication_group_name="aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa"
loose-group_replication_start_on_boot=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
loose-group_replication_single_primary_mode=FALSE
loose-group_replication_enforce_update_everywhere_checks= TRUE

start node 1

mysqld --defaults-file=/u01/data/mysql_group1/1/my.cnf

create replication user

mysql -u root -p --port 24801 --protocol=tcp


SET SQL_LOG_BIN=0;
CREATE USER rpl_user@'%';
GRANT REPLICATION SLAVE ON *.* TO rpl_user@'%' IDENTIFIED BY 'rpl_pass';
FLUSH PRIVILEGES;
SET SQL_LOG_BIN=1;
CHANGE MASTER TO MASTER_USER='rpl_user', MASTER_PASSWORD='rpl_pass' FOR CHANNEL 'group_replication_recovery';

bootstrap the group replication:

  • this need to be run only! on the first node!!
mysql -u root -p --port 24801 --protocol=tcp


SET GLOBAL group_replication_bootstrap_group=ON;
START GROUP_REPLICATION;
SET GLOBAL group_replication_bootstrap_group=OFF;

SELECT * FROM performance_schema.replication_group_members;
+---------------------------+--------------------------------------+-------------+-------------+--------------+
| CHANNEL_NAME              | MEMBER_ID                            | MEMBER_HOST | MEMBER_PORT | MEMBER_STATE |
+---------------------------+--------------------------------------+-------------+-------------+--------------+
| group_replication_applier | 1ce52f01-e615-11e6-9335-080027ad34e3 | host72      |       24801 | ONLINE       |
+---------------------------+--------------------------------------+-------------+-------------+--------------+
1 row in set (0.00 sec)

Adding a Second Server

mysqld --defaults-file=/u01/data/mysql_group1/2/my.cnf &

mysql -u root -p --port 24802 --protocol=tcp

SET SQL_LOG_BIN=0;
CREATE USER rpl_user@'%';
GRANT REPLICATION SLAVE ON *.* TO rpl_user@'%' IDENTIFIED BY 'rpl_pass';
FLUSH PRIVILEGES;
SET SQL_LOG_BIN=1;
CHANGE MASTER TO MASTER_USER='rpl_user', MASTER_PASSWORD='rpl_pass' FOR CHANNEL 'group_replication_recovery';

Adding a third Server

mysqld --defaults-file=/u01/data/mysql_group1/3/my.cnf &

mysql -u root -p --port 24803 --protocol=tcp

SET SQL_LOG_BIN=0;
CREATE USER rpl_user@'%';
GRANT REPLICATION SLAVE ON *.* TO rpl_user@'%' IDENTIFIED BY 'rpl_pass';
FLUSH PRIVILEGES;
SET SQL_LOG_BIN=1;
CHANGE MASTER TO MASTER_USER='rpl_user', MASTER_PASSWORD='rpl_pass' FOR CHANNEL 'group_replication_recovery';

have fun

]]>Baruch Assif (Osoveskiy)Blog Post number 42015-08-14T00:00:00+03:002015-08-14T00:00:00+03:00https://barucho.github.io/posts/2012/08/blog-post-4This is a sample blog post. Lorem ipsum I can’t remember the rest of lorem ipsum and don’t have an internet connection right now. Testing testing testing this blog post. Blog posts are cool.

Headings are cool

You can have many headings

Aren’t headings cool?

]]>Baruch Assif (Osoveskiy)Blog Post number 32014-08-14T00:00:00+03:002014-08-14T00:00:00+03:00https://barucho.github.io/posts/2014/08/blog-post-3This is a sample blog post. Lorem ipsum I can’t remember the rest of lorem ipsum and don’t have an internet connection right now. Testing testing testing this blog post. Blog posts are cool.

Headings are cool

You can have many headings

Aren’t headings cool?

]]>Baruch Assif (Osoveskiy)Blog Post number 22013-08-14T00:00:00+03:002013-08-14T00:00:00+03:00https://barucho.github.io/posts/2013/08/blog-post-2This is a sample blog post. Lorem ipsum I can’t remember the rest of lorem ipsum and don’t have an internet connection right now. Testing testing testing this blog post. Blog posts are cool.

Headings are cool

You can have many headings

Aren’t headings cool?

]]>Baruch Assif (Osoveskiy)Blog Post number 12012-08-14T00:00:00+03:002012-08-14T00:00:00+03:00https://barucho.github.io/posts/2012/08/blog-post-1This is a sample blog post. Lorem ipsum I can’t remember the rest of lorem ipsum and don’t have an internet connection right now. Testing testing testing this blog post. Blog posts are cool.

Headings are cool

You can have many headings

Aren’t headings cool?

]]>Baruch Assif (Osoveskiy)test blog page2012-08-14T00:00:00+03:002012-08-14T00:00:00+03:00https://barucho.github.io/posts/blog-post-test1This is a sample blog post. Lorem ipsum I can’t remember the rest of lorem ipsum and don’t have an internet connection right now. Testing testing testing this blog post. Blog posts are cool.

Headings are cool

You can have many headings

select * from table

select * from table;
SELECT * from TABLE;

def lambda_handler(event, context):
    print("START...")
    count = 0
    for record in event['Records']:
        #id = record['eventID']
        timestamp = record['kinesis']['approximateArrivalTimestamp']
        # Kinesis data is base64-encoded, so decode here
        message = base64.b64decode(record['kinesis']['data'])
        message_json = json.loads(message)
        print("message",message_json)
        # get ops type
        op_type = message_json['type']
        # build data 
        if op_type == ('WriteRowsEvent'):
            if message_json['table'] == ('user'):
                _id =  str(message_json['row']['values']['user_id'])
                _name =   str(message_json['row']['values']['u_name'])
                _text = None
                label = 'user'
            elif message_json['table'] == ('post'):
                _id =  str(message_json['row']['values']['post_id'])
                _name = str(message_json['row']['values']['p_name'])
                _text = str(message_json['row']['values']['p_text'])
                label = 'post'
            elif message_json['table'] == ('route'):
               _post_id =  str(message_json['row']['values']['post_id'])
               _user_id = str(message_json['row']['values']['user_id'])
               _status = str(message_json['row']['values']['status_id'])
               label = 'route'
            ## create the relent object in neptune 
            lbl = T.label
            id = T.id
            single = Cardinality.single
            # sending data to neptune
            if label == 'route':
                #gremlin_status = g.addV().property(id, _post_id).property('user_name', _name).property(lbl, label).next()
                print("route")
            else:
                _id = label+"_" +_id
                gremlin_status = g.addV().property(id, _id).property('user_name', _name).property(lbl, label).next()
            
            print("debug: data",_id,_name,label)
            print("gremlin_status:",gremlin_status)
            print("END")
    return 'Processed ' + str(count) + ' items.'

Aren’t headings cool?

]]>Baruch Assif (Osoveskiy)