My sql fabric ha and sharding solutions

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MySQL Fabric 为 Oracle 接手 MySQL 之后推出的一颗重磅炸弹。它以集群形式管理 MySQL 提供 HA 功能的同时可以提供数据分片的功能
(Sharding)。其中 HA 模式依赖 MySQL5.6+的 GTID 功能,数据分片可以使用多种方式如 Range,Hash 等。随着互联网的发展 MySQL 在 RDBMS
中的地位也越来越高.以目前 Oracle 的态度来说,MySQL 在将来将是一颗重要的棋子,在内部 Oracle 也在积极推动部分的 Cluster 朝 MySQL cluster
的转移。包括最新的 12c RAC Clusterware 套件也将会支持 MySQL。Fabric 的推出表明了 Oracle 推进 MySQL 向成熟化企业级应用发展的决心。
Fabric 总体架构

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MySQL Fabric 需要安装的组件：
●MySQL Fabric: Prerequisites
●MySQL Servers (version 5.6.10 or later)
●Backing store database server
●Application databaseservers
●Python 2.6 or 2.7
●No support for 3.x yet
●MySQL Utilities 1.4
●Available at https://dev.MySQL.com/downloads/tools/utilities
●MySQL-connect-python-1.2.2-1.e16.noarch
$MySQL --socket=/data/MySQL3334/data/MySQL.sock
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 57
Server version: 5.6.16-log MySQL Community Server (GPL)
Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
MySQL>

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我们的环境为：
MySQL Fabric + DB : 10.0.128.115:3334 MySQL5.6.16
MySQL server : 10.0.128.116-117:3334 10.0.128.254:3334 MySQL5.6.16
先创建 Fabric 用户注意这个用户所在的 DB 为 localhost 即 Fabric manage 所在主机的 DB：
MySQL> show grants for 'Fabric'@'127.0.0.1';
+---------------------------------------------------------------------------------------------------------------+
| Grants for Fabric@127.0.0.1 |
+---------------------------------------------------------------------------------------------------------------+
| GRANT USAGE ON *.* TO 'Fabric'@'127.0.0.1' IDENTIFIED BY PASSWORD '*14E65567ABDB5135D0CFD9A70B3032C179A49EE7' |
| GRANT ALL PRIVILEGES ON `Fabric`.* TO 'Fabric'@'127.0.0.1' |
+---------------------------------------------------------------------------------------------------------------+
2 rows in set (0.00 sec)
MySQL> show grants for 'Fabric'@'localhost';
+---------------------------------------------------------------------------------------------------------------+
| Grants for Fabric@localhost |
+---------------------------------------------------------------------------------------------------------------+
| GRANT USAGE ON *.* TO 'Fabric'@'localhost' IDENTIFIED BY PASSWORD '*14E65567ABDB5135D0CFD9A70B3032C179A49EE7' |
| GRANT ALL PRIVILEGES ON `Fabric`.* TO 'Fabric'@'localhost' |
+---------------------------------------------------------------------------------------------------------------+

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配置 Fabric 参数文件：
$cat /etc/MySQL/Fabric.cfg
[DEFAULT]
prefix =
sysconfdir = /etc
logdir = /var/log
[statistics]
prune_time = 3600
[logging]
url = file:///var/log/Fabric.log
level = INFO
[storage]
auth_plugin = MySQL_native_password
database = Fabric
user = Fabric
address = localhost:3334
connection_delay = 1
connection_timeout = 6
password = secret
connection_attempts = 6

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[failure_tracking]
notification_interval = 60
notification_clients = 50
detection_timeout = 1
detection_interval = 6
notifications = 300
detections = 3
failover_interval = 0
prune_time = 3600
[servers]
password = Fabric
user = Fabric
[connector]
ttl = 1
[client]
password =
[protocol.xmlrpc]
disable_authentication = no
ssl_cert =
realm = MySQL Fabric
ssl_key =
ssl_ca =

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threads = 5
user = admin
address = 10.0.128.115:32274
password = admin
[executor]
executors = 5
[Sharding]
MySQLdump_program = /usr/bin/MySQLdump
MySQLclient_program = /usr/bin/MySQL
直接初始化 Fabric 注意执行命令会后将在 Fabric 节点 MySQL database 建立相关的 table:
MySQLFabric manage setup --param=storage.user=Fabric --param=storage.password=secret
MySQL> use Fabric;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

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启动 Fabric manage：
Nohup MySQLFabric manage start &
[INFO] 1402648110.182016 - MainThread - Initializing persister: user (Fabric), server (localhost:3334), database (Fabric).
[INFO] 1402648110.190860 - MainThread - Loading Services.
[INFO] 1402648110.226332 - MainThread - Fabric node starting.
[INFO] 1402648110.300123 - MainThread - Starting Executor.
[INFO] 1402648110.300557 - MainThread - Setting 5 executor(s).
[INFO] 1402648110.301763 - Executor-0 - Started.
[INFO] 1402648110.315261 - MainThread - Executor started.
[INFO] 1402648110.332045 - MainThread - Starting failure detector.
[INFO] 1402648110.333889 - XML-RPC-Server - XML-RPC protocol server ('10.0.128.115', 32274) started.
[INFO] 1402648110.335377 - XML-RPC-Server - Setting 5 XML-RPC session(s).
[INFO] 1402648110.336328 - XML-RPC-Session-0 - Started XML-RPC-Session.

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Fabric 的全部命令 (后面利用 add group 等命令可以添加激活 Fabric 集群)
#MySQLFabric help commands
statistics node Retrieve statistics on the Fabric node.
statistics group Retrieve statistics on Procedures.
statistics procedure Retrieve statistics on Procedures.
group activate Activate failure detector for server(s) in a group.
group description Update group's description.
group deactivate Deactivate failure detector for server(s) in a group.
group create Create a group.
group remove Remove a server from a group.
group add Add a server into group.
group health Check if any server within a group has failed and report health
information.
group lookup_servers Return information on existing server(s) in a group.
group destroy Remove a group.
group demote Demote the current master if there is one.
group promote Promote a server into master.
group lookup_groups Return information on existing group(s).
dump Fabric_nodes Return a list of Fabric servers.
dump shard_index Return information about the index for all mappings matching any of
the patterns provided.
dump Sharding_information Return all the Sharding information about the tables passed as
patterns.
dump servers Return information about servers.

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dump shard_tables Return information about all tables belonging to mappings matching any
of the provided patterns.
dump shard_maps Return information about all shard mappings matching any of the
provided patterns.
manage teardown Teardown Fabric Storage System.
manage stop Stop the Fabric server.
manage setup Setup Fabric Storage System.
manage ping Check whether Fabric server is running or not.
manage start Start the Fabric server.
manage logging_level Set logging level.
server set_weight Set a server's weight.
server clone Clone the objects of a given server into a destination server.
server lookup_uuid Return server's uuid.
server set_mode Set a server's mode.
server set_status Set a server's status.
role list List roles and associated permissions
user roles Change roles for a Fabric user * protocol: Protocol of the user (for
example 'xmlrpc') * roles: Comma separated
list of roles, IDs or names (see `role
list`)
user usercommand Base class for all user commands
user list List users and their roles
user add Add a new Fabric user.
user password Change password of a Fabric user.
user delete Delete a Fabric user.
threat report_error Report a server error.

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threat report_failure Report with certantity that a server has failed or is unreachable.
Sharding list_definitions Lists all the shard mapping definitions.
Sharding remove_definition Remove the shard mapping definition represented by the Shard Mapping
ID.
Sharding move_shard Move the shard represented by the shard_id to the destination group.
Sharding disable_shard Disable a shard.
Sharding remove_table Remove the shard mapping represented by the Shard Mapping object.
Sharding split_shard Split the shard represented by the shard_id into the destination
group.
Sharding create_definition Define a shard mapping.
Sharding add_shard Add a shard.
Sharding add_table Add a table to a shard mapping.
Sharding lookup_table Fetch the shard specification mapping for the given table
Sharding enable_shard Enable a shard.
Sharding remove_shard Remove a Shard.
Sharding list_tables Returns all the shard mappings of a particular Sharding_type.
Sharding prune_shard Given the table name prune the tables according to the defined
Sharding specification for the table.
Sharding lookup_servers Lookup a shard based on the give Sharding key.
event trigger Trigger an event.
event wait_for_procedures Wait until procedures, which are identified through their uuid in a
list and separated by comma, finish their
execution.

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Fabric HA 测试：
直接添加 GROUP：
MySQLFabric group create pajk_group
在 MySQL server 中 (data node) 加入 Fabric 用户：
Grant all privileges on *.* to ‘Fabric’@’%’ identified by ‘Fabric’;
在 group 中添加 node:
MySQLFabric group add pajk_group 10.0.128.254:3334
激活 GROUP 选举出 PRIAMRY 节点
MySQLFabric group promote pajk_group --slave_id=10.0.128.116:3334
MySQLFabric group activate pajk_group

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查看节点选举情况:
#MySQLFabric group lookup_servers pajk_group
Command :
{ success = True
return = [{'status': 'SECONDARY', 'server_uuid': 'c05867d3-f2cd-11e3-b224-5254009c6d0c', 'mode': 'READ_ONLY', 'weight': 1.0, 'address':
'10.0.128.254:3334'}, {'status': 'PRIMARY', 'server_uuid': 'e2ca75e1-d65f-11e3-b8c2-525400d3350c', 'mode': 'READ_WRITE', 'weight': 1.0, 'address':
'10.0.128.116:3334'}, {'status': 'SECONDARY', 'server_uuid': 'e90d3e07-f2cd-11e3-b225-525400991d01', 'mode': 'READ_ONLY', 'weight': 1.0, 'address':
'10.0.128.117:3334'}]
activities =
}
可以看到已经成功建立了复制集合注意需要使用 GTID
Kill 掉主节点 PRIMARY
[WARNING] 1403000877.240037 - FailureDetector(pajk_group) - Server (e2ca75e1-d65f-11e3-b8c2-525400d3350c) in group (pajk_group) is unreachable.
[WARNING] 1403000881.458935 - Executor-2 - Reported issue (FAULTY) for server (e2ca75e1-d65f-11e3-b8c2-525400d3350c).
[INFO] 1403000881.463634 - Executor-2 - Master (e2ca75e1-d65f-11e3-b8c2-525400d3350c) in group (pajk_group) has been lost.
[WARNING] 1403000882.248376 - Executor-2 - Error (<server(uuid=e90d3e07-f2cd-11e3-b225-525400991d01, address=10.0.128.117:3334, mode=READ_ONLY,
status=SECONDARY>) trying to process transactions in the relay log for candidate (Error waiting for slave to catch up. Binary log (MySQL-bin.000018, 2050964).).
[INFO] 1403000882.990106 - Executor-2 - Master has changed from e2ca75e1-d65f-11e3-b8c2-525400d3350c to e90d3e07-f2cd-11e3-b225-525400991d01.

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主节点切换到了 10.0.128.117
Command :
{ success = True
'10.0.128.254:3334'}, {'status': 'FAULTY', 'server_uuid': 'e2ca75e1-d65f-11e3-b8c2-525400d3350c', 'mode': 'READ_WRITE', 'weight': 1.0, 'address':
'10.0.128.116:3334'}, {'status': 'PRIMARY', 'server_uuid': 'e90d3e07-f2cd-11e3-b225-525400991d01', 'mode': 'READ_WRITE', 'weight': 1.0, 'address':
'10.0.128.117:3334'}]
activities =
}
重新启动 10.0.128.116 加入 group
#MySQLFabric group remove pajk_group 10.0.128.116:3334
Procedure :
{ uuid = 62961ea5-3aef-4ab0-9502-07ef08bef6d3,
finished = True,
success = True,
return = True,
activities =
}

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#MySQLFabric group add pajk_group 10.0.128.116:3334
Procedure :
{ uuid = 873e43e1-e1fd-4b17-a73f-e665b8353108,
finished = True,
success = True,
return = True,
activities =
}
[root@pajk-t-MySQL-master1 /root]
Command :
{ success = True
'10.0.128.254:3334'}, {'status': 'SECONDARY', 'server_uuid': 'e2ca75e1-d65f-11e3-b8c2-525400d3350c', 'mode': 'READ_ONLY', 'weight': 1.0, 'address':
'10.0.128.116:3334'}, {'status': 'PRIMARY', 'server_uuid': 'e90d3e07-f2cd-11e3-b225-525400991d01', 'mode': 'READ_WRITE', 'weight': 1.0, 'address':
'10.0.128.117:3334'}]
activities =
}
10.0.128.116 重新加入了集群管理。

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Fabric Sharding 示范

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创建 3 个 Sharding 组：
Fabric_test1_global: 存放 metadata 信息复制 DDL 语句以及不在 Sharding set 组里的复制
分为两个 Sharding
Fabric_test1_shard1：存放 emp_no < 10000 的数据
Fabric_test1_shard2：存放 emp_no >=10000 的数据
添加 global group:
#MySQLFabric group create Fabric_test1_global
Procedure :
{ uuid = 69e8b16f-a42c-4759-b642-d3e0ead1ca3a,
finished = True,
success = True,
return = True,
activities =
}
[root@pajk-t-MySQL-master1 /Fabric]
#MySQLFabric group add Fabric_test1_global 10.0.128.254:3334
Procedure :

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{ uuid = be0e470f-fa65-4b77-a49a-173898eba7ec,
finished = True,
success = True,
return = True,
activities =
}
#MySQLFabric group create Fabric_test1_shard1
Procedure :
{ uuid = 3877fbb9-cf3a-4dd2-ae73-0592303915a1,
finished = True,
success = True,
return = True,
activities =
}
添加两个 Sharding group:
Procedure :
{ uuid = 3877fbb9-cf3a-4dd2-ae73-0592303915a1,
finished = True,
success = True,

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return = True,
activities =
}
#MySQLFabric group add Fabric_test1_shard1 10.0.128.116:3334
Procedure :
{ uuid = e1b2ef20-3329-4e5f-97cb-d9fc7372b210,
finished = True,
success = True,
return = True,
activities =
}
#MySQLFabric group promote Fabric_test1_shard1
Procedure :
{ uuid = 1d1834c5-53f1-40d0-b0d6-a15cc128bc21,
finished = True,
success = True,
return = True,
activities =
}

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Procedure :
{ uuid = 05a1ef78-f8a9-4c10-8afd-2fb9dc85626b,
finished = True,
success = True,
return = True,
activities =
}
#MySQLFabric group add Fabric_test1_shard2 10.0.128.117:3334
Procedure :
{ uuid = 984c95dd-1031-4d0c-ae37-8ff91dc94993,
finished = True,
success = True,
return = True,
activities =
}
# MySQLFabric group promote Fabric_test1_shard2
Procedure :
{ uuid = 804c1c0a-d474-4c4e-8a9d-494103fb5317,
finished = True,
success = True,
return = True,
activities =
}

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添加 shard 定义 (只用 range 分区  employees emp_no column)
#MySQLFabric Sharding create_definition RANGE Fabric_test1_global
Procedure :
{ uuid = 8d0cf317-8cc9-40e5-a8b8-aa4ded985a86,
finished = True,
success = True,
return = 1,
activities =
}
创建 mapping 使用 definition 的 return 值
#MySQLFabric Sharding add_table 1 employees.employees emp_no
Procedure :
{ uuid = 6702a70b-f32d-452c-af2d-df0da291109f,
finished = True,
success = True,
return = True,
activities =
}

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创建 Sharding range 条件
#MySQLFabric Sharding add_shard 1 Fabric_test1_shard1/0,Fabric_test1_shard2/10000 --state=ENABLED
Procedure :
{ uuid = 07d49de6-9778-4d53-b240-a5579a6ec740,
finished = True,
success = True,
return = True,
activities =
}
最终关系为: 10.0.128.254 作为 global group 负责存放 Sharding metadata 负责复制 DDL 到 slaves(10.0.128.117,10.0.128.116) 但是不存放实际数
据,slave 根据 Sharding 条件存放实际数据, 对于没有 Sharding 关系的表, 整个 Fabric 集群存在正常的复制关系即 Master->slave
MySQL> select * from groups;
+---------------------+-------------+--------------------------------------+----------------------------+--------+
| group_id | description | master_uuid | master_defined | status |
+---------------------+-------------+--------------------------------------+----------------------------+--------+
| Fabric_test1_global | NULL | fbfac317-f62b-11e3-881b-5254009c6d0c | 2014-06-18 03:19:44.000000 | |
| Fabric_test1_shard1 | NULL | fefe406d-f62c-11e3-8821-525400bead34 | 2014-06-18 03:20:28.000000 | |
| Fabric_test1_shard2 | NULL | fd54cafa-f632-11e3-8848-525400991d01 | 2014-06-18 03:20:54.000000 | |
+---------------------+-------------+--------------------------------------+----------------------------+--------+

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MySQL> select * from servers;
+--------------------------------------+-------------------+------+--------+--------+---------------------+
| server_uuid | server_address | mode | status | weight | group_id |
+--------------------------------------+-------------------+------+--------+--------+---------------------+
| fbfac317-f62b-11e3-881b-5254009c6d0c | 10.0.128.254:3334 | 3 | 3 | 1 | Fabric_test1_global |
| fd54cafa-f632-11e3-8848-525400991d01 | 10.0.128.117:3334 | 3 | 3 | 1 | Fabric_test1_shard2 |
| fefe406d-f62c-11e3-8821-525400bead34 | 10.0.128.116:3334 | 3 | 3 | 1 | Fabric_test1_shard1 |
+--------------------------------------+-------------------+------+--------+--------+---------------------+
MySQL> select * from shard_ranges;
+------------------+-------------+----------+
| shard_mapping_id | lower_bound | shard_id |
+------------------+-------------+----------+
| 1 | 0 | 3 |
| 1 | 10000 | 4 |
+------------------+-------------+----------+
MySQL> select * from shard_maps;
+------------------+-----------+---------------------+
| shard_mapping_id | type_name | global_group |
+------------------+-----------+---------------------+
| 1 | RANGE | Fabric_test1_global |
+------------------+-----------+---------------------+
1 row in set (0.00 sec)

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Code example:
TEST.LIU 不存在 Sharding 关系直接为 MS 复制：
MySQL> desc test.liu;
+-------+---------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+---------+------+-----+---------+-------+
| id | int(11) | YES | | NULL | |
+-------+---------+------+-----+---------+-------+
#cat test1.py
#!/usr/bin/python
#****************************************************************#
# ScriptName: test.py
# Create Date: 2014-06-13 17:18
# Modify Date: 2014-06-13 17:18
#***************************************************************#
import MySQL.connector
from MySQL.connector import Fabric
conn = MySQL.connector.connect(
Fabric={"host" : "10.0.128.115", "port" : 32274,
"username": "admin", "password" : "admin"
},

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user="Oracle", password="Oracle", autocommit=True
)
conn.set_property(group="Fabric_test1_global", mode=Fabric.MODE_READWRITE)
cur = conn.cursor()
cur.execute("USE test")
cur.execute(
"insert into liu values (1),(2),(3),(4)")
[MySQL@pajk-t-MySQL-slave1 /home/MySQL]
$MySQL --socket=/data/MySQL3334/data/MySQL.sock -e "select * from test.liu"
+------+
| id |
+------+
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 2 |
| 3 |
| 4 |
+------+
[MySQL@pajk-super-master /home/MySQL]

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+------+
| id |
+------+
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 2 |
| 3 |
| 4 |
+------+
[MySQL@pajk-t-MySQL-master2 /home/MySQL]
+------+
| id |
+------+
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 2 |
| 3 |
| 4 |
+------+

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此时为简单的 MS 关系：
MySQL> show slave statusG;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 10.0.128.254
Master_User: Fabric
Master_Port: 3334
Connect_Retry: 60
Master_Log_File: MySQL-bin.000001
Read_Master_Log_Pos: 441
Relay_Log_File: GSS-01-relay-bin.000002
Relay_Log_Pos: 651
Relay_Master_Log_File: MySQL-bin.000001
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 0
Last_Error:
Skip_Counter: 0

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Exec_Master_Log_Pos: 441
Relay_Log_Space: 856
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 10
Master_UUID: fbfac317-f62b-11e3-881b-5254009c6d0c
Master_Info_File: /data/MySQL3334/relaylog/master.info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it
Master_Retry_Count: 86400
Master_Bind:

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Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set: fbfac317-f62b-11e3-881b-5254009c6d0c:1-2
Executed_Gtid_Set: fbfac317-f62b-11e3-881b-5254009c6d0c:1-2
Auto_Position: 1
EMPLOYEES.EMPLOYEES 存在 Sharding 关系
#cat test6.py
#!/usr/bin/python
#****************************************************************#
# ScriptName: test6.py
# Create Date: 2014-06-18 00:49
# Modify Date: 2014-06-18 00:49
#***************************************************************#
#def add_subscriber(conn, emp_no, first_name, last_name):
# cur = conn.cursor()
# sql=""" INSERT INTO employees.employees VALUES (%s, %s, %s) """ % (emp_no, first_name, last_name)
# cur.execute(sql)

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# Address of the Fabric node, rather than the actual MySQL Server.
Fabric={"host" : "10.0.128.115", "port" : 32274,"username": "admin","password": "admin"},
user="Oracle", database="employees", password="Oracle", autocommit=True
)
conn.set_property(tables=["employees.employees"],key=10000, mode=Fabric.MODE_READWRITE)
#def add_subscriber(conn, emp_no, first_name, last_name):
cur = conn.cursor()
emp_no=10000
first_name="Fabric"
last_name="Fabric"
sql=""" INSERT INTO employees.employees VALUES ('%s', '%s', '%s') """ % (emp_no, first_name, last_name)
print sql
cur.execute(sql)
conn.commit()
此时 Master global group 不存放数据
$MySQL --socket=/data/MySQL3334/data/MySQL.sock -e "select * from employees.employees"
实际数据根据 Sharding 条件存放在 Sharding 节点：

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+----------+------------+-----------+
+----------+------------+-----------+
| 5000000 | liu | yang |
+----------+------------+-----------+
对表做 DDL 操作：
Sql=”alter table employees.employees add nickname varchar(20)”
#cat test10.py
#!/usr/bin/python
#****************************************************************#
# ScriptName: test.py
# Create Date: 2014-06-13 17:18
# Modify Date: 2014-06-13 17:18
#***************************************************************#
Fabric={"host" : "10.0.128.115", "port" : 32274,
"username": "admin", "password" : "admin"

www.vmcd.org
},
user="Oracle", password="Oracle", autocommit=True
)
conn.set_property(group="Fabric_test1_global", mode=Fabric.MODE_READWRITE)
cur = conn.cursor()
cur.execute("USE employees")
cur.execute(
"alter table employees add nickname varchar(20)")
$MySQL --socket=/data/MySQL3334/data/MySQL.sock -e "desc employees.employees"
+------------+-------------+------+-----+---------+-------+
+------------+-------------+------+-----+---------+-------+
| emp_no | int(11) | YES | | NULL | |
| first_name | varchar(20) | YES | | NULL | |
| last_name | varchar(20) | YES | | NULL | |
| nickname | varchar(20) | YES | | NULL | |
+------------+-------------+------+-----+---------+-------+

www.vmcd.org
$MySQL --socket=/data/MySQL3334/data/MySQL.sock -e "desc employees.employees"
+------------+-------------+------+-----+---------+-------+
+------------+-------------+------+-----+---------+-------+
| emp_no | int(11) | YES | | NULL | |
| first_name | varchar(20) | YES | | NULL | |
| last_name | varchar(20) | YES | | NULL | |
| nickname | varchar(20) | YES | | NULL | |
+------------+-------------+------+-----+---------+-------+
End:
Mysq Fabric 结合了传统架构的 HA 方案与互联网 Sharding 方案但是 Sharding 灵活性还不够。个人认为是 MHA+TDDL 方案的简集,在中小企业中可以
得到广泛的应用。
Ref:
http://dev.MySQL.com/doc/MySQL-utilities/1.4/en/Fabric-quick-start-replication.html
http://www.clusterdb.com/MySQL-Fabric/MySQL-Fabric-adding-high-availability-and-scaling-to-MySQL
http://dev.MySQL.com/doc/MySQL-utilities/1.4/en/connector-j-Fabric-env.html
http://docs.Oracle.com/cd/E17952_01/MySQL-utilities-1.4-en/connector-j-Fabric-env.html
http://www.clusterdb.com/MySQL-Fabric/MySQL-Fabric-add-scaling-to-MySQL
http://www.luocs.com/archives/862.html

My sql fabric ha and sharding solutions

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