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is a table that already exists in the database, and B is a table that is ready to be copied from table A: 1. sql that replicates only the table structure
CREATE TABLE B as select * from a where 1>1
2. sql that replicates the table structure and replicates the data in the table
CREATE TABLE B as select * from a
3.
Label:Copy and append of database(a) Separation:1. Stop the SQL Server service and copy the. mdf and. Ldf,ndf. Then start the service again.2. In the SQL Server operator interface, right-click the database you want to copy-all Tasks-detach. Copy the. mdf and. Ldf,ndf.(ii) additionalIn
If this article can add Auto-increment-increment,auto-increment-offset, these two configurations will be better.Reconfiguration of the MySQL replication is done to prepare for the study of MHA.
One, server description
192.168.10.103 Master192.168.10.209 slave1192.168.10.219 Slave2One main two from
Second, MySQL configuration
1,master Configuration
[Mysqld]Server-id=1Log-bin=mysql-binRead-only=0Binlog-do-db=test
2,SLAVE1 Configuration
[Mysqld]se
SQL Server 2000 replication synchronization configuration and frequently asked questions (below)(ii) Distribution, release of server-side configuration and issues1. Start the configuration publication, subscribe to the service area, and the Distribution Wizard2. Specify the snapshot shared folder on the network location3. Complete configuration4. Start the New Publication Wizard5. Select the
Tags: MySQL database database administrator database engineer database developmentCheck that replication is working by performing the show slave status on Slavemysql> SHOW SLAVE Status\g1. Row ***************************Slave_io_state:waiting for Master to send eventMaster_h
, but is determined by a dummies based on the database you have executed the "use work" or specified during the initial connection.This time, before executing the drop user operation, we need to select some data from the "work" database and then use work to enter the work database, as we all know, when executing the drop user operation, you do not need to enter t
Label:Replication: Data transfer to other servers to store, do backup.Mirror: The primary server database is hung and the other one is automatically run as the primary server.LOG: a controllable image.Cluster: The primary server is hung, and the other one is automatically run as the primary server, not limited to the database. Details: Quoted http://hi.baidu.com/jaimy_jie/blog/item/6e099ed52f42a4d250da4b24.
In SQL Server replication, when 1 large transactions are performed in the publishing database, such as a one-time operation of 100,000 or more million of data. When the operational data is completed at the publication database, the Log Reader Agent scans the transaction log and passes it to the distribution
WIN2008 R2 installed on the server, and then did not care about the machine name, after installing the SQL2008 R2 database, configure the ad domain to modify the machine name.Then, when you start configuring Database mirroring synchronization, try the following database replication publication, and the result is "
Original: The SQL Server updatable subscription has a row filter in the Synchronous replication removal project without reinitialization of all subscriptions!In synchronous replication of updatable subscriptions, there is a row-filtered Item table, which prompts for reinitialization of all snapshots and applies this snapshot, which causes all subscription databas
During MYSQL database Replication, the incorrect method is skipped. During MYSQL Replication, sometimes the Replication SQL process is incorrect due to different POS points on the master and slave sides, leading to master-slave Replicati
Label: In SQL Server replication, when you perform 1 large transactions in the publication database, such as 100,000 or more data at a time. When the operational data is completed at the publication database, the Log Reader Agent scans the transaction log for a one-time delivery to the distribution
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Both the Slave_IO process and the slave_ SQL process must run normally, and the status output shows "slave"; otherwise, the status is incorrect. If one value is Yes, the other is No ).
If the master dat
- # Row Save affects record data + # Mixed in front of two combinations -Binlog_format=Mixed 2, Slave end 1 # Stop Master-
slave synchronization 2 mysql> stop slave;
3
4 # Reconnect Time
-out when the connection is disconnected 5 mysql> to Master_connect_retry=;
6
7 # Turn on master
-Slave synchronization 8 mysql> start slave; The above connection time-out settings, similar way can be used to set the primary database IP, synchronization a
Data backup and Database Replication in Oracle user management mode
The first thing to note is that Oracle Database Backup can be divided into logical backup and physical backup.
Logical backup backs up data through data export, mainly through the old IMP/EXP and Data Pump lamp mode. It is suitable for databases with fewer changes. For high-availability databases
;
Enable force log mode: alter database force logging;
Alter database open;
Now you can check whether the archive is up, archive log list
1.5 enable minimal supplemental logging
-- Alter database add supplemental log data; this setting is described in many documents. However, if there is a problem with a non-primary key or a unique index table, it is found that a
SQL Server High Availability database replication: Modifies table structure, new tables, new stored procedures are replicated to subscribers?After you have configured database replication on SQL Server:1. If you add a field to the
of the problem, so generally do not filter on the primary node, the master recommended that all libraries are written to the binary log.(2) filtering from the serverThe SQL thread from the server only replays events related to the database or table concerned and applies them locally;Problem: It consumes more network IO and disk IO;Selection of Replay libraries:replicate_do_db=replicate_ignore_db=Selection
now two sub-query SELECT statements, the outer Select to query the inner layer as the data source, the inner Select and the outer select can return the expected results when executed separately, then why the update occurred: ERROR 1242 (21000): subquery returns more than 1 row ?Here's my guess: the execution of the UPDATE statement is one line, and when the first record is updated, update expects to get a data corresponding to the first record from the Select subquery, which is the update a_use
GXPT is a distributed system that temporarily includes the permission system, basic system, evaluation system, and examination system. Each system has its own oracle database. Our group is responsible for the evaluation system, and the normal evaluation system needs to rely on the permission system and basic system. The specific business is not explained here. The evaluation activities are coming soon. The basic system enters real data into the basic
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