We are running a Java PoS (Point of Sale) application at various shops, with a MySql backend. I want to keep the databases in the shops synchronised with a database on a host server.
When some changes happen in a shop, they should get updated on the host server. How do I achieve this?
Replication is not very hard to create.
Here s some good tutorials:
http://www.ghacks.net/2009/04/09/set-up-mysql-database-replication/
rel=“nofollow noreferer”> http://mysql.com/doc/refman/5.5/en/replication-howto.html。
http://www.lassosoft.com/Beginners-Guide-to-MySQL-Replication 。
在此,你们必须铭记一些简单的规则(当然更是,这是主要概念):
这样,你就可以避免错误。
For example: If your script insert into the same tables on both master and slave, you will have duplicate primary key conflict.
你可以把“奴隶”视为“备用”服务器,拥有与主人相同的信息,但不能直接补充数据,只能遵循主机的指示。
我建议监测你的服务器,以确保一切都受到罚款。
让我知道,你们是否需要额外的帮助?
三种不同的做法:
传统的客户/服务器办法:没有将任何数据库放入商店;只能使用服务器。 当然,如果你设置一个小分机,但简单地总结一下SSL或小sh中的联系是合理的。 建议:它采用最初设想的数据库的方式。 同意:如果你有很高的相对性,复杂的行动会缓慢,那么你可能不得不使用储存的程序来减少往返次数。
复制主/硕士:如@Book Of Zeus所建议的。 趋同:建立起来较为复杂(特别是如果你有几家店),在任何车间机器中打碎,可能会损害整个系统。 预测:将行动改为“行动”完全是当地行动,书写行动是同步传播的。
脱线业务+星级:在当地和时段工作(每小时、每天、每周、每小时工作一次),用最新合成业务中的所有新记录/经修改的记录撰写摘要,并向服务器发送。 证明:没有网络、快速、容易检查(如果摘要可以读)。 内容:没有实时信息。
元数据是答案。 它支持多个用户,提供一种方向或双向的非同步数据复制。 它利用网络和数据库技术复制关系数据库之间的表格,如果希望的话,将几乎实时复制。
满足你的需要的全面而有力的 Java普森。
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