Replication is the process of sharing any level of information so as to ensure consistency between redundant hardware/software resources to improve reliability, fault-tolerance, and accessibility

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automatic transactional replication failover to noce2 with AG failover

I am working on to set up high availability group like SQL01,SQL02,SQL03(DR) and SQLRPT01 as the reporting server which has our reporting DB. * From SQL01 to RPT01, I am running transnational ...
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Data replication vs parallel shard query

I'm not a DBA, and I'm wondering how a SQL Server database can scale to fit the needs of a social network. I'm not interested in NOSQL, and I understand that caching plays an important role in ...
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65 views

Replication topology advice - central subscriber

I'm seeking guidance and advice about how to set up replication in MSSQL to deal with the following criteria. We have a central server hosted at a data center - this is where our web app is located. ...
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117 views

SQL Server Merge Replication Dummy Update issue

We have SQL Server 2005 SP4, using merge replication. We started getting this error when the subscribers try to replicate (not all of them but most): The process could not deliver dummy update ...
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39 views

How to efficiently synchronize MySQL slave with secondary mater?

I have a database setup with chained replication: +-----------+ +-----------------+ +----------+ | A: master | <-- | B: slave/master | <-- | C: slave | +-----------+ ...
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291 views

Excluding the standard MySQL databases from replication

I have a prod database, say appdb, and I only care about the data in that db. Is it safe to declare replicate-ignore-db for each of mysql,information_schema,performance_schema,test, as some tutorials ...
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47 views

Mysql Replication Master/Slave and Master/Master

Looking for some insight and opinions from some DBAs, as I've been tasked to look into using Master/Master replication for a single table in a database. We currently run mysql replication using a ...
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34 views

How to restart mysql slave node?

i have 8 slave servers and i need to restart one of them but in my.cnf file master-host, master-user etc. variables dont exists. So if i restart server as indicated here replication will start again?
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47 views

“Oneway” Replication from Oracle DB to TimesTen

currently I'm really stuck into a problem and I not able to finde a nice way to realize that. I need a suggestion to replicate from oracle db (some tables) to a TimesTen. A connection is only ...
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46 views

Ways to monitor Replication messages in SQL Server 2012

I have a question for the Replication gurus here. Replication is a massive evil (but absolutely necessary) in my company. What are the various ways to monitor replication performance. I know viewing ...
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150 views

Replicating tables for reporting purpose

We have 5 tables in a database on Server A that we would like to replicate to Server B for reporting purposes. We would like to create different indexes on the destination copy so we can get better ...
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33 views

Data mirroring suggestions

On my test environment, I have a SQL 2012 2-node physical cluster that accesses a common iSCSI storage on a separate Windows Server 2012 box. What options are there if I want to backup this storage to ...
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195 views

Native replication from Percona XtraDB Cluster to a standard stand-alone slave

I'm replicating from one node of a three-member Percona XtraDB cluster to a separate slave, using regular MySQL replication. The node is set to write binlog in ROW mode, with log_slave_updates=true ...
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51 views

Mysql replication from existing slave to new slave

I'm hoping you experts can help advise me, I've got this topology: Live DB(Master) ----> Backup Server (Master and slave) ----> Test DB Backup server is a slave of Live DB, and Test DB is a slave of ...
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How to configure replication from PostgreSQL (RDS) to vanilla PostgreSQL?

I have an Amazon RDS Postgres DB and I created a "replicator" user and granted it the "replication" privilege. db=> create role replicator login password 'something'; CREATE ROLE db=> alter ...
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66 views

Fast-Failover in Mysql

I need experts suggestion on this. I see fast-failover option is available from Mysql 5.6.5 onwards. I have a requirement asking to go for Mysql auto-failover of vip and database within Mysql itself. ...
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82 views

Error in configuration sql server replication

I am configuring replication for a sql server 2005 on win server 2003. I get this error: TITLE: New Publication Wizard SQL Server could not configure 'aaaa' as a Distributor. ...
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516 views

How to add an article to existing replication

This is the first time I am going to add tables to replication. I have outlined the below steps to add a new table to existing replication. Please correct me if I am wrong. The table is just created ...
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91 views

Masking or substring data while replicating data

I have a table that has some unencrypted data that needs to be replicated to another server. I want to do : Mask the data with an x except the last 5 characters e.g. xxxx12345 just replicate ...
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456 views

row-based replication with slave triggers

I'm replicating a prod MySQL database to an analytics one. I need to drop several tables with sensitive data from the analytics and also redact several columns of several remaining tables, replacing ...
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766 views

SQL Server - Snapshot Agent won't start [closed]

I have successfully set up Replication. The problem is Snapshot Agent won't start. When I try to start it manually I always end up with "The agent has never been run." Publication runs under the ...
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181 views

Postgres streaming replication to a different schema on another server?

We've got a system with about a dozen Postgres 9.3 databases representing a dozen different applications. In order to do reporting across systems, we have a script that dumps each database and loads ...
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132 views

SSIS v/s Replication v/s logshipping

I have 2 SQL server instances, on different servers. One is Production instance and gets lots of reads and writes daily. Another one is for external applications to use a copy of few of the tables ...
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478 views

SQL Server replication service in Amazon RDS

I have a local infrastructure with multiple SQL Servers. Some of the servers have replications services to copy some data to a master database. Is it possible to have the replication services to work ...
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33 views

Merge replication parameterised filters

We are looking at using merge replication to maintain a 2-way data flow between a central SQL Server 2012 Standard database and, eventually, 100's of international satellite SQL Express 2012 ...
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52 views

Automatic Failover without data replication

I have a need to be able to automatically failover my databases and most need data replication. However, one database does not need data replication and so, for performance reasons, we do not include ...
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50 views

Replication in mysql with many servers

There are 3 shops. In each of these is a mysql server. I want all servers to synchronize their date if at least one server changes the date. I read a bit of literature and realized that I need ...
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mysql safe mode running caused replication failure

I have been using database replication (Master-Master) in two of my server's running Mysql over Ubuntu 12.04 LTS server edition. I had to reset the database root user password of one of the server ...
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265 views

How much RAM should you allocate a MySQL replication slave?

Our MySQL master is allocated 24GB of RAM (innodb_buffer_pool_size = 24GB), but was curious if there was some standard amount to allocate to a replication slave? Right now the slave is just used to ...
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126 views

How to remove master role from MySQL server

I have 2 MySQL servers, one is the master and other one is slave, that's all good. The problem I have is that the slave is also set up as a master. I would like to disable or remove the master role ...
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42 views

mysql replication

I have a master mysql server (M1) with two replicating slaves behind it. I also have another master mysql server (M2) with it's two slave servers. The slave servers currently replicate everything from ...
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60 views

SQL Server replicated databases swap

I have a SQL Server 2012 database. I would like to be able to make changes to this database or to it's replication, then make the replica, the real one. The point here is to have 0 downtime on ...
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mysql 5.6 GTID replication 'Got fatal error 1236 from master when reading data from binary log'

I Checked SHOW SLAVE STATUS error is "'Got fatal error 1236 from master when reading data from binary log: ''The slave is connecting using CHANGE MASTER TO MASTER_AUTO_POSITION = 1, but the master ...
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Making data from one schema available to another schema

I need to make data that is currently in one schema available to a different user in the same Oracle database. Does this require that we replicate data from one schema to another? Or is there a ...
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SQL Replication - Data not showing

Good Morning, I have recently setup SQL replication and changed some data in one of the tables on the primary table. This data however has not been replicated to the subscription server. On the ...
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79 views

How can I find out if any cluster member is offline in mongodb cluster?

I have a mongodb cluster with 1 master machine(running mongos and config service) and 3 slave machines(used as data store).But now,I find that one of 3 machines (192.168.10.11) is down because I can ...
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Log Shipping in lieu of replication

I have two SQL Server 2008 R2 systems that, due to network restrictions, cannot use SQL Server replication. However, data needs to be shared between these systems. It may be possible to send a file ...
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2k views

MySQL:How to correct a corrupted MySQL binary log on Master server?

We are using MySQL DB with one master and one slave. We are using this setup for months now. The slave sync stopped today and the error we got was: Last_IO_Errno: 1236 Last_IO_Error: Got ...
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MySQL SSL Master-Slave replication not syncing

I have originally posted this thread on stackoverflow and after a comment I moved it here. The original post can be found here. I have setup a typical Master-Slave replication scheme for my MySQL ...
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1answer
83 views

How can I compare the server impact of transaction replication

We are developing a system that must extract data from an existing SQL Server 2008 R2 cluster. One of our design goals is to limit the performance impact on that cluster as much as is practical. ...
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1k views

Log Reader Agent is not running - The job failed

I created a transactional replication on PRE-PROD (via TSQL) and everything works as expected. On PROD platform replication is not working. While inspecting Replication monitor, I get this error ...
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Master - Master replication Duplicate entry

I've got a Master - Master replication setup and it worked fine for a couple of days but I keep getting: Duplicate entry errors after a few days... My setup is as follow: One server in The ...
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98 views

How to know if logreader agent already exists?

I'm creating a script to recreate a database for test purposes, and the database has some publications. In order to create or not the logreader agent I need to know if the current database already ...
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1answer
148 views

Transactional Replication: can create 52 publication, but creating 53rd leads to problems

My apologies in advance for a long post, but I was really trying to make sure I do my due diligence before turning to the community for help, so here it goes. I am working on a proof of concept with ...
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35 views

Transactional Replication Update process

I need to create report using ssrs. for that i create the main table contains the values from nine other tables which is the Source tables. Now the new source tables which are used for main table are ...
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112 views

Mysql replication dump without down time? empty sql file

I try to create dump as replication master data and use followed command to create dump, but sql file only contains paramters and there is no data and structure. The command is : mysqldump ...
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192 views

Drop & re-add subscribers to transactional replication

I'm trying to get Stored Procedures to execute on the subscribers, as seems to be best practice. I already have transactional replication running happily. I add a new sproc, and set properties of ...
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29 views

Permission error replica set

I'm having some trouble with intentionally removing a secondary from a replica set. I'm trying to simulate unexpected shutdown. My replica set consists of one primary and 2 secondaries. When I shut ...
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470 views

MySQl master - master replication not working [closed]

I'm trying to setup a master - master setup and I see both masters connect to each other in workbench: server 1: -- Thread Id: 112 -- User: slave -- Host: 207.244.73.38:55164 -- DB: None -- ...
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Start mongod instance on replica set as background job

I have setup a Mongodb replica set with 1 secondary node. When i execute on secondary sudo mongod --replSet rs0 --dbpath /data --port 27017 --oplogSize 700 The primary and secondary nodes are ...