1.?
先了解一下你是否應(yīng)該用
mysql
集群。
減少數(shù)據(jù)中心結(jié)點(diǎn)壓力和大數(shù)據(jù)量處理,采用把
mysql
分布,一個(gè)或多個(gè)
application
對(duì)應(yīng)一個(gè)
mysql
數(shù)據(jù)庫(kù)。把幾個(gè)
mysql
數(shù)據(jù)庫(kù)公用的數(shù)據(jù)做出共享數(shù)據(jù),例如購(gòu)物車,用戶對(duì)象等等,存在數(shù)據(jù)結(jié)點(diǎn)里面。其他不共享的數(shù)據(jù)還維持在各自分布的
mysql
數(shù)據(jù)庫(kù)本身中。
?
?
?
2.?
集群
Mysql
中名稱概念
.(
如上圖
)
1
)
Sql
結(jié)點(diǎn)(
SQL node--
上圖對(duì)應(yīng)為
mysqld
)
:
分布式數(shù)據(jù)庫(kù)。包括自身數(shù)據(jù)和查詢中心結(jié)點(diǎn)數(shù)據(jù)
.
2
)數(shù)據(jù)結(jié)點(diǎn)
(Data node -- ndbd):
集群共享數(shù)據(jù)
(
內(nèi)存中
).
3
)管理服務(wù)器
(Management Server – ndb_mgmd):
集群管理
SQL node,Data node.
?
3
.配置
?????? mysql-max
版本,當(dāng)然現(xiàn)在
mysql
集群系統(tǒng)
windonws
平臺(tái)上面不被支持
.
??????
安裝
mysql
就不多說了,網(wǎng)上一打堆,簡(jiǎn)明扼要。
?????? A:192.168.1.251 – Data node
和
Management Server.
?????? B:192.168.1.254 – SQL node.
當(dāng)然,你也可以讓一個(gè)機(jī)器同時(shí)為
3
者。
A,B my.inf
加上:
??????
[MYSQLD]???????????????????????
ndbcluster????????????????????? # run NDB engine
ndb-connectstring=192.168.1.251? # location of MGM node
?
# Options for ndbd process:
[MYSQL_CLUSTER]????????????????
ndb-connectstring=192.168.1.251? # location of MGM node
?
A: /var/lib/mysql-cluster/config.ini
[NDBD DEFAULT]???
NoOfReplicas=1??? # Number of replicas
DataMemory=80M??? # How much memory to allocate for data storage
IndexMemory=18M?? # How much memory to allocate for index storage
????????????????? # For DataMemory and IndexMemory, we have used the
????????????????? # default values. Since the "world" database takes up
????????????????? # only about 500KB, this should be more than enough for
????????????????? # this example Cluster setup.
# TCP/IP options:
[TCP DEFAULT]????
portnumber=2202?? # This the default; however, you can use any
???????????????
??# port that is free for all the hosts in cluster
????????????????? # Note: It is recommended beginning with MySQL 5.0 that
????????????????? # you do not specify the portnumber at all and simply allow
????????????????? # the default value to be used instead
# Management process options:
[NDB_MGMD]?????????????????????
hostname=192.168.1.251?????????? # Hostname or IP address of MGM node
datadir=/var/lib/mysql-cluster? # Directory for MGM node logfiles
# Options for data node "A":
[NDBD]????????????????? ????????
??????????????????????????????? # (one [NDBD] section per data node)
hostname=192.168.1.251?????????? # Hostname or IP address
datadir=/usr/local/mysql/data?? # Directory for this data node's datafiles
# SQL node options:
[MYSQLD]
hostname=192.168.1.254
#[MYSQLD] #
這個(gè)相當(dāng)于
192.168.1.251
?
?
4.??????
啟動(dòng)測(cè)試
?
·????????
在管理服務(wù)器上面(這里是192.168.1.251
):
·???????????????
shell> ndb_mgmd -f /var/lib/mysql-cluster/config.ini
?
·????????
在數(shù)據(jù)結(jié)點(diǎn)服務(wù)器上面(依然是192.168.1.251
and more):
·???????????????
shell> ndbd --initial (
第一次時(shí)加 --initial 參數(shù))
?
·????????
SQL
結(jié)點(diǎn)服務(wù)器上面(192.168.1.254
):
·???????????????
shell> mysqld &
?
在
251
上面察看
?
./ndb_mgm
-- NDB Cluster -- Management Client --
ndb_mgm> show
Connected to Management Server at: 192.168.1.251:1186
Cluster Configuration
---------------------
[ndbd(NDB)]???? 1 node(s)
id=2??? @192.168.1.251? (Version: 5.0.22, Nodegroup: 0, Master)
?
[ndb_mgmd(MGM)] 1 node(s)
id=1??? @192.168.1.251? (Version: 5.0.22)
?
[mysqld(API)]?? 1 node(s)
id=3??? @192.168.1.254? (Version: 5.0.22)
?
ok
關(guān)閉集群:
shell>
ndb_mgm -e shutdown
?
?
5
.基本的集群說明
1
)在mysql 集群中.當(dāng)table引擎為NDBCLUSTER時(shí)才做集群,其他非NDBCLUSTER表和一般mysql數(shù)據(jù)庫(kù)表一樣,不會(huì)共享數(shù)據(jù). NDBCLUSTER 表數(shù)據(jù)存儲(chǔ)在Data node服務(wù)器內(nèi)存中,Data Node可以為1臺(tái)或多臺(tái)服務(wù)器,它們之間存放共享數(shù)據(jù)。Data Node服務(wù)器可以分組數(shù)據(jù)copy。
例如:2,3,4,5 為四臺(tái)Data Node服務(wù)器ID. 2,3為組0。? 4,5為組1。? 2,3維持數(shù)據(jù)相同, 4,5維持數(shù)據(jù)相同。 組0和組1維持數(shù)據(jù)不同。
??? 2
) sql node 服務(wù)器中,非NDBCLUSTER數(shù)據(jù)存在本身數(shù)據(jù)庫(kù)中,table引擎為NDBCLUSTER時(shí),數(shù)據(jù)存儲(chǔ)在Data Node 中。當(dāng)查詢NDBCLUSTER表時(shí),它會(huì)從Data node集群中提起數(shù)據(jù).
??? 3)Manager server
???
管理SQl node 和Data node 狀態(tài)。
?
?
6
深入了解
http://dev.mysql.com/doc/refman/5.0/en/ndbcluster.html
posted on 2006-06-28 11:58
地獄男爵(hellboys) 閱讀(61959)
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