sql server replication troubleshooting

Label:I. What is covered in this article (Contents) What is covered in this article (Contents) Background (contexts) Scenario (solution) Scenario I (Solution one) Programme II (Solution two) Programme III (solution three) Implementation (process) Precautions (Attention) References (References) two. Background (contexts) In the SQL Server datab

Troubleshooting of mysql semi-synchronous replication and mysql Synchronization 1. BackgroundBy default, online mysql replication is asynchronous. In extreme cases, when switching between the master and slave databases, there is a certain probability that the slave database has less data than the master database. Therefore, after switching, we use tools to perfor

Original: SQL Server changes replication agent profile parameters and two conflicting policy settingsSince it is often necessary to synchronize tests and change agent profile properties, it is always scripted to facilitate testing.There are two kinds of conflicting policies for updatable subscriptions: one is conflict in the publication, that is, when the subscri

Test environment: Host: Database SQL SERVER08 r2 system Windows Server R2 IP192.168.1.202Cong: Database SQL Server12 system Windows IP192.168.1.100Implementation steps: 1, first on the master-slave machine to add user sqladmin, Password * * * *, and set up under the Administeator (host for example)2. Turn off the master and the firewall3, set the startup type of

Label:In today's scale OLTP system, it is a good way to solve the problem by replicating multiple copies in order to alleviate the single point of reading and writing pressure in the database, especially the read pressure.The SQL Server transactional replication transactional Replication is the most common form of

SQLServer2008 is able to see the subscription to Oracle or DB2 when the subscription is being placed, but there is no indirect interface for copying to MySQL.The end of the test, through MySQL ODBC driver, is able to implement the SQLServer2008 copy to MySQL, thus implementing the schema from the library is SQL Server, read-only library for MySQL.Firstly, a general distribution and release database is requi

configuration file (executed at the Distributor on any database) exec sp_add_agent_parameter @profile_id = one --the ID of the profile , @parameter_name = ' resolverstate ' --parameter name , @parameter_value = 1 --parameter value Change the parameters of the agent configuration file (executed at the Distributor on any database) exec sp_change_agent_parameter @profile_id = one --The ID of the configuration file , @parameter_name = ' resolverstate ' -- Parameter name , @paramete

But I think this feature is also useful for setting up a backup server or a test server. On a single machine to publish services, you can subscribe to other machines in the SQL, according to your release of different conditions, you can make a timed synchronization, real-time synchronization, synchronization and other different publications and subscriptions. T

Tags: tin pre ATI Subscription. NET stat Func PSU startOriginal: SQL Server transactional replication uses scripts to add publications for an object--use [Publish library]--Add Table: Create the project and add it to the publication exec sp_addarticle @publication = n ' replicationname ', @article = N ' MyObject ', @sourc E_owner = n ' dbo ', @source_object = N '

, Ignore_dup_key = off, Allow_row_locks = on, allow_page_locks = ON) O N [PRIMARY]) on [PRIMARY]GOThen: Insert into Table1 (filed1,filed2) Select Filed1,filed2 from Table2 (this is definitely not a correct notation, self-increment ID problem)thus: SET IDENTITY_INSERT [Table_1] on INSERT to Table1 (id,filed1,filed2) Select Id,filed1,filed2 from Table1 SET IDENTITY _insert [Table_1] Off (SET identity_insert [table_1] on | | OFF allows an explicit value to be inserted into the identity column of th

= exec_master_log_pos relay_master_log_ File | LessView the corresponding table to see if the table has a primary key, index structure, etc.(2) Check the system is not overloaded Cpu,memory,io,IO can be viewed through tools iotop and Pt-ioprofileIf it is found that the slave_relay_log_info.ibd file under the MySQL library occupies a high IO, you can consider the large sync_relay_log_info, so that the file synchronization is not too frequent.The CPU can be viewed through the top command:If user i

= 3 Modifying a configuration file EXECSp_change_agent_parameter@profile_id = -, @parameter_name = 'MaxBCPThreads',@parameter_value = 4 EXECSp_change_agent_parameter@profile_id = -, @parameter_name = 'BcpBatchSize',@parameter_value = 100000 EXECSp_change_agent_parameter@profile_id = -, @parameter_name = 'PollingInterval',@parameter_value = 500000 after optimization Subscription Library Generation The test results show