mongodb 主从复制

资料来源：
[url]
http://blog.sina.com.cn/s/blog_48f9c0840100mmt1.html
[/url]

[root@jieshiyeskey ~]# lsb_release -a

LSB Version:     :core-3.1-amd64:core-3.1-ia32:core-3.1-noarch:graphics-3.1-amd64:graphics-3.1-ia32:graphics-3.1-noarch

Distributor ID: CentOS

Description:     CentOS release 5.5 (Final)

Release:  5.5

Codename:      Final

[root@jieshiyeskey ~]# uname -m

x86_64

[root@jieshi /var/db/mongodb]# uname -a

FreeBSD jieshi.hapame.com.cn 8.1-RELEASE FreeBSD 8.1-RELEASE #0: Mon Jul 19 02:36:49 UTC 2010     [e-mail]:/usr/obj/usr/src/sys/GENERIC  amd64

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[root@jieshi ~]# cd /usr/ports/databases/mongodb/  

[root@jieshi /usr/ports/databases/mongodb]# make install clean

[root@jieshi ~]/usr/local/etc/rc.d/mongod onestart #首次启动

[root@jieshi ~]# cat /etc/rc.conf

mongod_enable="YES" #加入参数后，重启就可以用Usage: /usr/local/etc/rc.d/mongod [fast|force|one](start|stop|restart|rcvar|status|poll)

 

[root@jieshiyeskey ~]# cat /etc/yum.repos.d/markgeng.repo

[10gen]

name=10gen Repository

baseurl=http://downloads.mongodb.org/distros/centos/5.4/os/x86_64/

gpgcheck=0

[root@jieshiyeskey ~]# yum -y install mongo-stable*

[root@jieshiyeskey ~]# /etc/init.d/mongod start

Starting mongod: all output going to: /var/log/mongo/mongod.log

forked process: 5028

                                                           [  OK  ]

[root@jieshiyeskey ~]# netstat -an |grep 27017

tcp        0      0 0.0.0.0:27017               0.0.0.0:*                   LISTEN     

unix  2      [ ACC ]     STREAM     LISTENING     13236  /tmp/mongodb-27017.sock

[root@jieshiyeskey ~]# ps -ef|grep mongod

mongod    5028     1  0 14:23 ?        00:00:00 /usr/bin/mongod -f /etc/mongod.conf

root      5091  4836  0 14:25 pts/0    00:00:00 grep mongod

在mongoDB 主服务器(linux)的配置如下：

[root@markgneg ~]# vim /etc/mongod.conf

master = true

source = 192.168.16.103,192.168.16.216 (从服务器上的IP)

oplogSize = 64

[root@markgneg ~]# /etc/init.d/mongod restart

Stopping mongod:                                           [  OK  ]

Starting mongod: all output going to: /var/log/mongo/mongod.log

forked process: 6601

                                                           [  OK  ]

在mongoDB 从服务1(linux)上配置如下：

[root@jieshiyeskey ~]# vim /etc/mongod.conf

slave = true

source = 192.168.16.205 #主服务器的IP地址

only = test  #指仅仅复制此数据库

在mongoDB 从服务2(freebsd)上配置如下：

[root@jieshi ~]# cat /usr/local/etc/mongodb.conf

slave=true

source=192.168.16.205 #主服务器的IP地址

only=test #指仅仅复制此数据库

[root@jieshiyeskey ~]# /etc/init.d/mongod restart

Stopping mongod:                                           [  OK  ]

Starting mongod: all output going to: /var/log/mongo/mongod.log

forked process: 5461

测试：

在主服务器上：

[root@markgneg ~]# mongo

MongoDB shell version: 1.6.4

connecting to: test

> db.foo.save({"id":110,"name":'jieshichina'})

> db.foo.find({"id":110})

{ "_id" : ObjectId("4cda3f97eec444f3184d8e09"), "id" : 110, "name" : "jieshichina" }

在从服务器上1(linux)：

[root@jieshiyeskey ~]# mongo

MongoDB shell version: 1.6.4

connecting to: test

> db.foo.find({"id":110})

{ "_id" : ObjectId("4cda3f97eec444f3184d8e09"), "id" : 110, "name" : "jieshichina" }

在从服务器2上（freebsd）

 [root@jieshi ~]# mongo

MongoDB shell version: 1.6.3

connecting to: test

> db.foo.find({"id":110})

{ "_id" : ObjectId("4cda3f97eec444f3184d8e09"), "id" : 110, "name" : "jieshichina" }

> exit

参考：

 https://github.com/erh/mongo-jdbc
 http://www.mongodb.org/display/DOCS/SQL+to+Mongo+Mapping+Chart
 http://code.google.com/p/morphia/wiki/Datastore