replication

问题 In Sql Server2008 R2 and Windows Server 2008R2, when I start Replication I have this error: TCP Provider: The semaphore timeout period has expired Please help me to solve it. 回答1: in order to fix the error: System.IO.IOException: The semaphore timeout period has expired. ​Solution​ I have done below NIC changes to resolve this error. Open the Network and Sharing Center. Right click on Ethernet Adapter>>Properties Select Client for Microsoft Networks Click on Configure Tab Click on Advanced

问题 I'm in the initial phase of designing an application that will have a backend implemented in C# that will provide data for other platforms using WCF web services hosted on IIS. One of the platforms will the the iPhone. Since it's a personal project, I want to use it to learn MongoDB. I already know that there are community developed drivers for MongoDB and C#, so I could handle the persistence on the server side using MongoDB. Without even knowing the replications models offered by MongoDB, I

问题 I want to connect and execute one (or sometimes several) SQL statements, and NOT have those replicated to the slaves. I have no replicate-do or replicate-ignore configs, so I can't use some non-replicated database to send the commands from. And I know about: set global sql_slave_skip_counter = 1 But that's on the slave. I'd like to be able to run a similar command on the master and have the following N commands not sent out to the slaves (which I guess means not logged in the binlogs, either)

问题 I have looked at some resources already and just want to clarify and get an opinion. First of all to totally avoid any problems we could just not bother using identity columns as primary keys instead have them generated ourselves and just have those values replicated both ways presuming they are always unique at any time of creation. For the purposes of this question I am talking about 2 or more way replication to solve global access issues and we do have identity columns. Now we are setting

问题 I would like to rename a PostgreSQL (9.6) table in a way that is recoverable for my system (A java app using JPA/Hibernate) In my java code, a JPA entity would have the following annotations @Entity @Table(name="old_name") and the database would have an equivalent table called old_name . I would like to rename the table to new_name in a way that I can incrementally update the database and java app, allowing for failure and rollback. Typical steps would be create copy of old_name in new_name

问题 I would like to rename a PostgreSQL (9.6) table in a way that is recoverable for my system (A java app using JPA/Hibernate) In my java code, a JPA entity would have the following annotations @Entity @Table(name="old_name") and the database would have an equivalent table called old_name . I would like to rename the table to new_name in a way that I can incrementally update the database and java app, allowing for failure and rollback. Typical steps would be create copy of old_name in new_name

问题 According to Microsoft, SQL Server 2008 Express should be able to participate in merge replication, as a pull subscriber. At least with the RMO-objects. http://msdn.microsoft.com/en-us/library/ms147890.aspx http://msdn.microsoft.com/en-us/library/ms151819.aspx But other variants should also be possible to use. However, we are not able to start the SQL Server Agent on the clients (running SQL Server 2008 Express). This seems to be a common problem, and as far as I can find, unsolved. Am I

问题 I'm supporting on rails project, which contain rails app and additional instance with Solr. My environment: rails 3.2.1, ruby 2.1.2, sunspot 2.1.0, Solr 4.1.6. Problem: Clould provider is not stable. I cannot use other cloud provider - it is customer's demand. Oftentimes search server goes on maintenance and web application stop working on production. So, I think about how to make 2 identical search servers instead of one, to make system more stable: if one server will be down, other will

问题 I am trying to insert a value into a column of datatype image in SQL Server. I am getting the following error: Length of LOB data (70823) to be replicated exceeds configured maximum 65536. The statement has been terminated. The data length is less than 2 MB. What is the problem? 回答1: For SQL Server 2005 or earlier you can run: sp_configure 'max text repl size', 2147483647 For SQL Server 2008 or later you can run: sp_configure 'max text repl size', -1 The former increases the maximum size

问题 The redis slave won't sync with the master. Connectivity: I can connect to the master when I issue HOST_NAME=fakehost redis-cli -h $HOST_NAME and check the master status using a command like INFO , so connectivity is not an issue. Settings: From the slave box, I issued SLAVEOF $HOST_NAME 6379 And received an OK . When I issue the INFO command on the slave, I get # Replication role:slave master_host:<removed> master_port:6379 master_link_status:down master_last_io_seconds_ago:-1 master_sync_in