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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MySQL relay log corrupted, how do I fix it? Tried but failed

A MySQL v5.1.61 relay got corrupted when the machine suddenly shut down. I tried to fix it but it didn't work. — How do I fix it? Did I do something wrong? As far as I've read, corrupted MySQL relay ...
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151 views

Backing up MySQL w/MyISAM on Amazon RDS

So, for various good reasons, we're maintaining a mySQL database using a MyISAM engine on Amazon RDS. I've just taken over this application, and I'm concerned we're not getting good backups, since ...
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198 views

MySQL Master Slave Replication and backup

I would like to implement the following backup solution as highlgihted on the mysql site: To use replication as a backup solution, replicate data from the master to a slave, and then back up the ...
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1answer
681 views

Cannot get my slave - replication server to start

My replication server will not start. I have followed the instructions here: http://opensourcedbms.com/dbms/setup-replication-with-postgres-9-2-on-centos-6redhat-el6fedora/ As well as several other ...
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81 views

Replication slave re-reading WAL on restart

I have a standard streaming replication setup going with PostgreSQL 9.1. It works fine. However, if I stop the slave cleanly (to move it or perform other maintenance) and restart it a short time ...
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156 views

Log file growth due to replication issue

I have one primary database and it's getting replicated to another server. Both servers are SQL Server 2008 R2 with SP1. Replication was running fine till last week. We have transaction log backup ...
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176 views

Snapshotting Database Tables

I have a reporting database (in SQL Server) that takes nightly snapshots of the production data (Oracle) for users to query against for the next day, but now the requirement is getting to be that they ...
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1answer
129 views

Copy few rows from one database to another

I have two PostgreSQL databases on two different machines and the network connection is slow. I would like to copy few selected rows from the first instance to the second. Unfortunately, the full dump ...
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248 views

How can I keep two databases on different sites in sync?

I'm working on a web application that exists at two sites. Each system is hosted on it's own LAMP stack, with access restricted to specific users on the network. When content is updated via user ...
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51 views

CRC checkup in MongoDB

I am new to MongoDB and currently working on a project. I read tutorials but I'm unable to find any information about Cyclic Redundancy Check (CRC) in MongoDB. Is there any way to check that the data ...
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34 views

log-slave-updates doesn't write in relay bin with replication-ignore-table option

Here my MySQL circular replication : db1 -----> db2 -------> db3 ignore table db2.t1 db1, 2 and 3 are the same database. db2 ignore t1 table. (replication-ignore-table) Every server has ...
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136 views

How to remove orphaned Log Reader Agents from Replication Monitor?

How do I remove the two Log Reader Agents with errors from the Replication Monitor? As you can see, the job does not exist (Error message produced by right click > Properties on errored Log Agent ...
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96 views

.NET error when trying to create snapshot for transactional Replication

I encountered a bizarre prob today while creating a transactional publication on a SQL 2012 server running on Windows Server 2008R2. I had just had some success creating and initializing some Merge ...
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37 views

Create extra databases on a MySQL slave (RDS)

Is there any trouble I can get into with switching off read-only on an MySQL slave (on Amazon RDS), and adding a few extra databases for unrelated use? While we need a read replica for ...
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3answers
1k views

Is replication possible on two different domains?

I am implementing a database replication between different geograhical locations where each one is on a different domain. After going through all the process, when I start the agent it runs and stops. ...
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234 views

mariadb-galera-server with Aria?

With Galera now somewhat supporting MyISAM replication, does that also mean that it will replicate Aria databases with storage engine (which is more or less feature complete to MyISAM, and a drop in ...
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1answer
255 views

Approaches for Real time copy of database on same SQL Server instance

I have a draft of requirements that look like this: Production database should be copied in real-time to "Pre-prod" database The Pre-prod database should be available to read and update It should be ...
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34 views

Replicating MongoDB server on windows

I have a main server(windows-27017) and on that i replicated my data on different port (37017) but same server. Now i am trying to add my notebook as a replicate server on mongodb and installed ...
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1k views

Best Possible Solution for Reporting Mirroring or Replication?

Hi I have SQL SERVER 2008R2 Data Centre Edition and I use SSRS and a Vendor application for reporting. I have a Reporting Server where we backup and restore everyday from Live Server to have Data ...
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205 views

How do I monitor PostgreSQL WAL shipping if I'm not using streaming replication?

We have a fairly simple setup to replicate from our on-premise master PostgreSQL database to our presentation tier in AWS. We're using WAL shipping using the archive_command setting. Basically the ...
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69 views

re-enabling a table for mysql replication

We were able to setup mysql master-slave replication with the following version on both master/slave: mysqld Ver 5.5.28-29.1-log for Linux on x86_64 (Percona Server (GPL), Release 29.1) One day, ...
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67 views

Can I change the default settings for SQL Server Replication

Is there a way to change the default setting in SQL Server replication? Example when I create an new article I want to have the create Non-Cluster set to true all the time.
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MySQL Slave with erratic Read_Master_Log_Pos during binlog rotation?

I have two mysql servers setup with default my.cnf config apart from server-id's and enabling binlogs on masters. Replication is setup and working and i have a simple bash scrip on master feeding in ...
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255 views

Replication - Binary log parsing(Tableid generation, ON DELETE CASCADE handling, Changed columns for update event)

I am using MySQL 5.5 with InnoDB engine. I have set binlog format as row-based replication. I have some doubts regarding replication: 1) How is the tableID generated? Is it stored somewhere? 2) ...
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2answers
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Postgres: What happens if your slave DB went down temporarily?

I have a master DB that is replicated to a slave DB through binary replication. What happens if this slave DB were to go offline for a period of time? Would it eventually catch up with the master as ...
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185 views

SQL Server replication - set PollingInterval in sp_addmergepushsubscription_agent

I am trying to create replication subscriptions to and SQL Server 2008 R2 via a script. There are 3 subscribers so this script creates the subscriptions by calling sp_addmergesubscription and then ...
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How to copy a table during replication in MySQL?

I have two MySQL servers; db1 and db2. db1 is production and db2 is for reporting. I have setup replication where db1 is master and db2 is slave. This current setup works fine. I was given a new ...
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Mirroring vs. Log Shipping

The software company I work for is planning to migrating our infrastructure into the cloud. Our current focus is to find the best database replication method. Current Servers: SQL Server 2008 SE - ...
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130 views

How to upgrade MySQL 5.0 to 5.5 with master-master replication?

I have to update 2 hosts with SUSE Linux Enterprise 11 from SP2 to SP3 which implies an update from MySQL 5.0.94 to 5.5.31. The release notes state: SLE 11 SP3 introduces the upgrade of the MySQL ...
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65 views

Replication with two side update but one side insert

I have server A and server B. I want server A can see data and changes on specific article on server B . But server B just see its own data . And also I want to update server B's data on both servers ...
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57 views

Merge replication web sync pull error

I have some problems with web synchronization for the Merge Replication. I repeated every step described here but I have always the same error: Security Error ....Unable to connect to the URL ...
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55 views

PostgreSQL Failover Issue

I have 3 PostgreSQL (9.1) server's, 1 master and 2 slave. I have configured streaming replication between them. Now when i shutdown the primary server and convert one of the slave to act as primary ( ...
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425 views

SQL Server Transactional Replication over Internet

I have 2 instances with SQL Server 2008R2 and i would like to build Transactional replication between those server, one is in the Local Network (Local_Instance) and the second server is over Internet ...
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71 views

Multi-master and multi slave

I have been having some issues creating a redundant multi master setup. Here's the proposed layout: The problem I'm having is when something is written to master1 it replicates to slave1 and ...
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108 views

MySQL: records, inserted via phpMyAdmin, do not replicate

As it says on the topic, for some reason records inserted/ modified via PMA do not get replicated to the slave, If I do exactly the same insert/modification on master via mysql command line, or ...
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326 views

SQL Server Data Transactional Replication of huge data, locking down table

We have setup data transactional replication from Server-A(SQL Server 2008 R2) to Server-B(SQL Server 2008 R2). We have a SQL Job scheduled to run everyday on Server-A, which executes single UPDATE ...
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28 views

Accessing Database from Slave server

I have an application running in one server eg: My Server's Ip is 192.168.10.10, and I have the MySQL database server in the same machine. The application connects database server as localhost. ...
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Initializing Transactional Replication From two Different Database Backup

I have two different large Database (200GB for each) which I want to replicate their data to a central database (3rd DB). I followed this link and it was very useful for a single database. But my ...
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1answer
213 views

Double queue reader or is it still busy?

I came across this line in the verbose log on replication QueueReader Agent job startup. The Queue Reader Agent has encountered the error 'Another queuereader agent for the subscription or ...
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2answers
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Snapshot for transactional replication taking too long for large database

I want to establish a transaction replication of a large database (200GB). But when I create the publisher and the snapshot agent starts, it takes very very long time and it sticks on the following ...
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199 views

How can I verify that MySQL's slave_compressed_protocol is working

I've set slave_compressed_protocol=1 on both my master and slave. Using SHOW VARIABLES, I can see that it's set. How can I check that it's actually working?
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469 views

Merge reports 'You must rerun snapshot because current snapshot files are obsolete', gets caught in Death Loop

We have a very large Merge publication for a data warehouse with some large (.bcp files on the order of 20GB) fact tables that is causing us tremendous trouble. Specifically, we created a publication ...
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130 views

Looking for suggestions to Migrate Amazon RDS Large Instance to non-amazon host - Live

We have an Amazon RDS Large instance with a database of about 20GB that needs to be migrated without having to take our website down or minimize downtime to less than a couple of hours. And I am ...
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1answer
156 views

MySQL 1366 Error on Replication Slave

I've got two pairs of servers (each identical hardware and OS) with replication running on both pairs. Running MySQL 5.5.34 on Windows Server 2008 R2. I'm trying to track down a problem that has ...
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250 views

Mysterious merge replication problems creating a subscription

We have a merge publication which had been mostly working OK for a long time (years). Recently an article was added, we were informed the snapshot was out of date, so we regenerated it. Then we got ...
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2answers
252 views

Scheduling duplication of two tables across instances

In my SQL Server 2012 database I have two tables: [tbl_Customers] - about 30 rows [tbl_Users] - about 10,000 rows I need to schedule the two tables above to be copied to a new instance, say every ...
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2answers
441 views

Excessive replication snapshot size causing failure

I am searching for an explanation of a replication snapshot being in excess of 5 times what we're predicting Following a replication failure we are attempting to reinitialise subscriptions with a new ...
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1answer
120 views

Select @@identity in Merge Replication

I'm going to implement database replication (merge publication, bi-direction) between two servers running SQL Server 2008 Standard edition. The setup is alright but it comes to a problem when ...
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Central publisher with two subscribers merge replication

Scenario: I am (not very professional) a DB admin of a company located in CityA with two branches in CityB and CityC. Their working hours are from 8 AM to 5 PM. The boss is working in CityA and wants ...
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139 views

Adding a replication article manually & failing to generate new replication sprocs

I've got a large number of articles I need to add to a new replication transactional publication in a dynamic fashion, but appear to be running into an error every time I switch replication on. ...