Spider HA 20100922(DTT#7)

HA feature of Spider Kentoku SHIBA kentokushiba at gmail dot com

Basic structure

Basic structure tbl_a tbl_a tbl_a DB11 DB12 DB13 Data nodes tbl_a DB7 tbl_a DB7 DB6 DB6 DB1 DB21 Spider nodes Monitoring nodes Spiders HA structure is composed of data nodes, spider nodes and monitoring nodes.

The part of structure- Data nodesData nodes store real data.Each data node that linked same Spider table store same data.(like RAID 1)- Spider nodesThe entrance of user access.Spider nodes offer load balance, fail over and transparently access todata node.- Monitoring nodesMonitoring nodes monitor data nodes.

Monitoring parameters- monitoring_bg_interval(mbi) Interval of background monitoring.(microsecond) The default value is 10000000- monitoring_bg_kind(mbk) The kind of background monitoring. 0 : It doesnt monitor. 1 : It monitors state of connection. 2 : It monitors state of a table without where clause. The default value is 0

Monitoring parameters- monitoring_kind(mkd) The kind of monitoring. 0 : It doesnt monitor. 1 : It monitors state of connection. 2 : It monitors state of a table without where clause. The default value is 0- monitoring_limit(mlt) The limititation of records at monitoring table. (Only when monitoring_kind is bigger than 1, it is effective.) 0 or more : Number of limitation. The default value is 1- monitoring_server_id(msi) The server_id of monitoring MySQL server. The default value is self server_id

How to set up HA without stopping the service

How to set up HASpider can set up HA by each table. Here, I will explain how to set up HA, without stopping service.

Initial Structure tbl_a Create table tbl_a ( col_a int, DB2 col_b int, primary key(col_a)Create table tbl_a ( ) engine = InnoDB; col_a int, col_b int, primary key(col_a)) engine = SpiderConnection ‘ tbl_a table “tbl_a”, user “user”, password “pass”, DB1 host “DB2”‘; There are 1 MySQL server with Spider and 1 remote MySQL server without Spider.

Step 1 tbl_a tbl_a tbl_a DB2 DB3 DB4 tbl_a Create table tbl_a ( col_a int, DB1 col_b int, primary key(col_a) ) engine = InnoDB;Add new data nodes(DB3 and DB4) and tables.

Step 2 tbl_a tbl_a tbl_a DB2 DB3 DB4 Create table tbl_a ( col_a int, col_b int, primary key(col_a) ) engine = Spider tbl_a Connection ‘ table “tbl_a”, DB1 tbl_a DB7 user “user”, password “pass”, DB6 host “DB2 DB3 DB4” DB5 ‘; Add new monitoring nodes (DB5, DB6, DB7) and tables.

Step 3 insert into mysql.spider_link_mon_servers (db_name, table_name, link_id, sid, server, scheme, host, port, socket, username, password) values tbl_a tbl_a tbl_a (db_name, tbl_a, 0, DB5_sid, null, mysql, DB5, 3306, null, user, pass‘), (db_name, tbl_a, 0, DB6_sid, null, mysql, DB6, 3306, null, user, pass‘), DB2 DB3 DB4 (db_name, tbl_a, 0, DB7_sid, null, mysql, DB7, 3306, null, user, pass‘);Alter table tbl_aConnection ‘ table “tbl_a”, user “user”, password “pass”, host “DB2 DB3 DB4”, tbl_a mbk “2”, mkd “2”, msi “DB5_sid”, DB1 tbl_a DB7 link_status “0 2 2” DB6‘; DB5 Register monitornig node information to MySQL servers with Spider. Then alter table on DB1.

Step 4 tbl_a tbl_a tbl_a DB2 DB3 DB4 tbl_a Select spider_copy_tables(‘tbl_a’, ‘’, ‘’); DB1 tbl_a DB7 DB6 DB5 Copy data from DB2 to DB3 and DB4.

Finish tbl_a tbl_a tbl_a DB2 DB3 DB4Alter table tbl_aConnection ‘ table “tbl_a”, user “user”, password “pass”, host “DB2 DB3 DB4”, tbl_a mbk “2”, mkd “2”, msi “DB5_sid”, link_status “0 1 1” DB1 tbl_a DB7‘; DB6 DB5 Alter table on DB1.

How to add new node after failover and preparing new server without stopping the service

Create a table of a new node to the clustered tableYou need to create a new node, in order tomaintain redundancy, when there is a troubleat the node that composes the cluster. Here, I will explain how to add a table of a new node, without stopping the service.

Initial Structure tbl_a tbl_a tbl_a DB2 DB3 DB4 tbl_a DB1 tbl_a DB7 DB6 DB5 There are 4 MySQL servers with Spider (include 3 monitoring nodes) and 3 MySQL servers without Spider (including 1 broken node).

Step 1 tbl_a tbl_a tbl_a tbl_a DB8 DB2 DB3 DB4Create table tbl_a ( tbl_a col_a int, col_b int, DB1 tbl_a DB7 primary key(col_a) DB6) engine = InnoDB; DB5 Add new data node(DB8) and table.

Step 2 tbl_a tbl_a tbl_a tbl_a DB8 DB2 DB3 DB4 Alter table tbl_a tbl_a Connection ‘ table “tbl_a”, user “user”, DB1 tbl_a DB7 password “pass”, DB6 host “DB2 DB4 DB8” DB5 ‘; Alter table on monitoring nodes (DB5, DB6 and DB7).

Step 3 tbl_a tbl_a tbl_a tbl_a DB8 DB2 DB3 DB4Alter table tbl_aConnection ‘ table “tbl_a”, user “user”, password “pass”, host “DB2 DB4 DB8”, tbl_a mbk “2”, mkd “2”, msi “DB5_sid”, DB1 tbl_a DB7 link_status “0 0 2” DB6‘; DB5 Alter table on DB1.

Step 4 tbl_a tbl_a tbl_a tbl_a DB8 DB2 DB3 DB4 tbl_a Select spider_copy_tables(‘tbl_a’, ‘’, ‘’); DB1 tbl_a DB7 DB6 DB5 Copy data from DB2 to DB8.

Finish tbl_a tbl_a tbl_a tbl_a DB8 DB2 DB3 DB4Alter table tbl_aConnection ‘ table “tbl_a”, user “user”, password “pass”, host “DB2 DB4 DB8”, tbl_a mbk “2”, mkd “2”, msi “DB5_sid”, DB1 tbl_a DB7 link_status “0 0 1” DB6‘; DB5 Alter table on DB1.

Any Questions?Thank you for taking your time!! Kentoku SHIBA (kentokushiba at gmail dot com) http://wild-growth.blogspot.com/ http://spiderformysql.com

Spider HA 20100922(DTT#7)

by Kentoku on Dec 07, 2010

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Spider HA 20100922(DTT#7) — Presentation Transcript

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