replication

It is possbile set/reset the AUTO_INCREMENT value of a MySQL table via ALTER TABLE some_table AUTO_INCREMENT = 1000 However I need to set the AUTO_INCREMENT upon its existing value (to fix M-M replication), something like: ALTER TABLE some_table SET AUTO_INCREMENT = AUTO_INCREMENT + 1 which is not working Well actually, I would like to run this query for all tables within a database. But actually this is not very crucial. I could not find out a way to deal with this problem, except running the queries manually. Will you please suggest something or point me out to some ideas. Thanks Using:

PG在9.*版本后热备提供了新的一个功能，那就是Stream Replication的读写分离,是PG高可用性的一个典型应用，也就是我们传统意义上说的Hot-Standby，比如Oracle的DG，mssql的mirror以及Mysql的读写分离等，与其他数据库相比较，有相同点，也有不同点，这些后述。下面是PG的流复制的安装步骤以及测试。 环境： Vmware Workstation 8.0 操作系统:CentOS 6.2 数据库 ：PostgreSQL 9.1.3 虚拟主机2台 MASTER: 192.168.2.130 SLAVE: 192.168.2.129 环境参数 [postgres@localhost ~]$ echo $PGHOME /home/postgres [postgres@localhost ~]$ echo $PGDATA /database/pgdata Step1： 安装PG数据库 略，slave端可以只装数据库，不初始化数据库 Step2：创建流复制用户 master端执行: CREATE USER repuser replication LOGIN CONNECTION LIMIT 3 ENCRYPTED PASSWORD ' repuser'; Step3：配置Master端的访问文件pg_hba.conf 增加一行： host

I try to deploy my Mongo database in Mongolabs, everything works fine, and I create a new database. Please see my connectionstring. public DbHelper() { MongoClientSettings settings = new MongoClientSettings() { Credentials = new MongoCredential[] { MongoCredential.CreateCredential("dbname", "username", "password") }, Server = new MongoServerAddress("ds011111.mongolab.com", 11111), //ConnectTimeout = new TimeSpan(30000) }; Server = new MongoClient(settings).GetServer(); DataBase = Server.GetDatabase(DatabaseName); } but when I try to connect the database it's shows error like: Ragesh S I am

I'm doing a INSERT ... ON DUPLICATE KEY UPDATE but I need the update part to be conditional, only doing the update if some extra condition has changed. However, WHERE is not allowed on this UPDATE . Is there any workaround for this? I can't do combinations of INSERT/UPDATE/SELECT since this needs to work over a replication. LouisXIV I suggest you to use IF() to do that. Refer: conditional-duplicate-key-updates-with-mysql INSERT INTO daily_events (created_on, last_event_id, last_event_created_at) VALUES ('2010-01-19', 23, '2010-01-19 10:23:11') ON DUPLICATE KEY UPDATE last_event_id = IF(last