I figured that it was time to check out how to install, configure,
run and use MySQL Cluster on Windows. To keep things simple, this first
Cluster will all run on a single host but includes these nodes:
- 1 Management node (ndb_mgmd)
- 2 Data nodes (ndbd)
- 3 MySQL Server (API) nodes (mysqld)
Downloading and installing
Browse to the
Windows section of the MySQL Cluster 7.0 download page and download the installer (32 or 64 bit).
MySQL Cluster Windows Installer
Run the .msi file and choose the “Custom” option. Don’t worry about
the fact that it’s branded as “MySQL Server 7.0″ and that you’ll go on
to see adverts for MySQL Enterprise – that’s just an artefact of how the
installer was put together.
On the next screen, I decided to change the “Install to” directory to “c:mysql” – not essential but it saves some typing later.
Go ahead and install the software and then you’ll be asked if you
want to configure the server – uncheck that as we’ll want to tailor the
configuration so that it works with our Cluster.
There are a couple of changes you need to make to your Windows configuration before going any further:
- Add the new bin folder to your path (in my case “C:mysqlbin”)
- Make hidden files visible (needed in order to set up multiple MySQL Server processes on the same machine)
Configure and run the Cluster
Copy the contents of “C:ProgramDataMySQLMySQL Server 7.0data” to
“C:ProgramDataMySQLMySQL Server 7.0data4″, “C:ProgramDataMySQLMySQL
Server 7.0data5″ and “C:ProgramDataMySQLMySQL Server 7.0data6″.
Note that this assumes that you’ve already made hidden files visible. Each of these folders will be used by one of the mysqld processes.
Create the folder “c:mysqlcluster” and then create the following files there:
config.ini
[ndbd default]
noofreplicas=2
[ndbd]
hostname=localhost
id=2
[ndbd]
hostname=localhost
id=3
[ndb_mgmd]
id = 1
hostname=localhost
[mysqld]
id=4
hostname=localhost
[mysqld]
id=5
hostname=localhost
[mysqld]
id=6
hostname=localhost
my.4.cnf
[mysqld]
ndb-nodeid=4
ndbcluster
datadir="C:ProgramDataMySQLMySQL Server 7.0data4"
port=3306
server-id=3306
my.5.cnf
[mysqld]
ndb-nodeid=5
ndbcluster
datadir="C:ProgramDataMySQLMySQL Server 7.0data5"
port=3307
server-id=3307
my.6.cnf
[mysqld]
ndb-nodeid=6
ndbcluster
datadir="C:ProgramDataMySQLMySQL Server 7.0data6"
port=3308
server-id=3308
Those files configure the nodes that make up the Cluster.
From a command prompt window, launch the management node:
C:UsersAndrew>cd mysqlcluster
C:mysqlcluster>ndb_mgmd -f config.ini
2009-06-16 20:01:20 [MgmSrvr] INFO -- NDB Cluster Management Server. mysql-5.1.34 ndb-7.0.6
2009-06-16 20:01:20 [MgmSrvr] INFO -- The default config directory 'c:mysqlmysql-cluster' does not exist. Trying to create it...
2009-06-16 20:01:20 [MgmSrvr] INFO -- Sucessfully created config directory
2009-06-16 20:01:20 [MgmSrvr] INFO -- Reading cluster configuration from 'config.ini'
and then from another window, check that the cluster has been defined:
C:UsersAndrew>ndb_mgm
-- NDB Cluster -- Management Client --
ndb_mgm> show
Connected to Management Server at: localhost:1186
Cluster Configuration
---------------------
[ndbd(NDB)] 2 node(s)
id=2 (not connected, accepting connect from localhost)
id=3 (not connected, accepting connect from localhost)
[ndb_mgmd(MGM)] 1 node(s)
id=1 @localhost (mysql-5.1.34 ndb-7.0.6)
[mysqld(API)] 3 node(s)
id=4 (not connected, accepting connect from localhost)
id=5 (not connected, accepting connect from localhost)
id=6 (not connected, accepting connect from localhost)
Fire up 2 more command prompt windows and launch the 2 data nodes:
C:UsersAndrew>ndbd
2009-06-16 20:08:57 [ndbd] INFO -- Configuration fetched from 'localhost:118
6', generation: 1
2009-06-16 20:08:57 [ndbd] INFO -- Ndb started
NDBMT: non-mt
2009-06-16 20:08:57 [ndbd] INFO -- NDB Cluster -- DB node 2
2009-06-16 20:08:57 [ndbd] INFO -- mysql-5.1.34 ndb-7.0.6 --
2009-06-16 20:08:57 [ndbd] INFO -- Ndbd_mem_manager::init(1) min: 84Mb initi
al: 104Mb
Adding 104Mb to ZONE_LO (1,3327)
2009-06-16 20:08:57 [ndbd] INFO -- Start initiated (mysql-5.1.34 ndb-7.0.6)
WOPool::init(61, 9)
RWPool::init(22, 13)
RWPool::init(42, 18)
RWPool::init(62, 13)
Using 1 fragments per node
RWPool::init(c2, 18)
RWPool::init(e2, 14)
WOPool::init(41, 8 )
RWPool::init(82, 12)
RWPool::init(a2, 52)
WOPool::init(21, 5)
(repeat from another new window for the second data node).
After both data nodes (ndbd) have been launched, you should be able to see them through the management client:
ndb_mgm> show
Cluster Configuration
---------------------
[ndbd(NDB)] 2 node(s)
id=2 @127.0.0.1 (mysql-5.1.34 ndb-7.0.6, Nodegroup: 0, Master)
id=3 @127.0.0.1 (mysql-5.1.34 ndb-7.0.6, Nodegroup: 0)
[ndb_mgmd(MGM)] 1 node(s)
id=1 @127.0.0.1 (mysql-5.1.34 ndb-7.0.6)
[mysqld(API)] 3 node(s)
id=4 (not connected, accepting connect from localhost)
id=5 (not connected, accepting connect from localhost)
id=6 (not connected, accepting connect from localhost)
Finally, the 3 MySQL Server/API nodes should be lauched from 3 new windows:
C:UsersAndrew>cd mysqlcluster
C:mysqlcluster>mysqld --defaults-file=my.4.cnf
C:UsersAndrew>cd mysqlcluster
C:mysqlcluster>mysqld --defaults-file=my.5.cnf
C:UsersAndrew>cd mysqlcluster
C:mysqlcluster>mysqld --defaults-file=my.6.cnf
Now, just check that all of the Cluster nodes are now up and running from the management client…
ndb_mgm> show
Cluster Configuration
---------------------
[ndbd(NDB)] 2 node(s)
id=2 @127.0.0.1 (mysql-5.1.34 ndb-7.0.6, Nodegroup: 0, Master)
id=3 @127.0.0.1 (mysql-5.1.34 ndb-7.0.6, Nodegroup: 0)
[ndb_mgmd(MGM)] 1 node(s)
id=1 @127.0.0.1 (mysql-5.1.34 ndb-7.0.6)
[mysqld(API)] 3 node(s)
id=4 @127.0.0.1 (mysql-5.1.34 ndb-7.0.6)
id=5 @127.0.0.1 (mysql-5.1.34 ndb-7.0.6)
id=6 @127.0.0.1 (mysql-5.1.34 ndb-7.0.6)
Using the Cluster
There are now 3 API nodes/MySQL Servers/mgmds running; all accessing
the same data. Each of those nodes can be accessed by the mysql client
using the ports that were configured in the my.X.cnf files. For example,
we can access the first of those nodes (node 4) in the following way
from (yet another) window:
C:UsersAndrew>mysql -h localhost -P 3306
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 2
Server version: 5.1.34-ndb-7.0.6-cluster-gpl MySQL Cluster Server (GPLType 'help;' or 'h' for help. Type 'c' to clear the current input statement.
mysql> use test;
Database changed
mysql> create table assets (name varchar(30) not null primary key, value int) engine=ndb;
Query OK, 0 rows affected (1.44 sec
mysql> insert into assets values ('car', 950);
Query OK, 1 row affected (0.00 sec
mysql> select * from assets;
+------+-------+
| name | value |
+------+-------+
| car | 950 |
+------+-------+
1 row in set (0.00 sec
mysql> insert into assets2 values ('car', 950);
Query OK, 1 row affected (0.00 sec)
To check that everything is working correctly, we can access the same database through another of the API nodes:
C:UsersAndrew>mysql -h localhost -P 3307
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 2
Server version: 5.1.34-ndb-7.0.6-cluster-gpl MySQL Cluster Server (GPL)
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
mysql> use test;
Database changed
mysql> show tables;
+----------------+
| Tables_in_test |
+----------------+
| assets |
+----------------+
1 row in set (0.06 sec)
mysql> select * from assets;
+------+-------+
| name | value |
+------+-------+
| car | 950 |
+------+-------+
1 row in set (0.09 sec)
It’s important to note that the table (and its contents) of any table
created using the ndb storage engine can be accessed through any of the
API nodes but those created using other storage engines are local to
each of the API nodes (MySQL Servers).
Your next steps
This is a very simple, contrived set up – in any sensible deployment,
the nodes would be spread accross multiple physical hosts in the
interests of performance and redundancy. You’d also set several more
variables in the configuration files in order to size and tune your
Cluster. Finally, you’d likely want to have some of these processes
running as daemons or services rather than firing up so many windows.
It’s important to note that Windows is not a fully supported platform
for MySQL Cluster. If you have an interest in deploying a production
system on Windows then please contact me at mattoace@gmail.com
