Master - Master replication Duplicate entry error
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 follows: One server in The Netherlands...
View ArticleRemove master role from MySQL server
I have two 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...
View ArticleMysql 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...
View ArticleMySQL Master/Slave replication on same VM instance?
I'm fairly new to databases so I hope this isn't a silly question! Is it possible to set up master/slave replication on the SAME server? I understand there are not any advantages to this in terms of...
View ArticleSQL Server Merge Replication Error - Could not Propagate to the subscriber
I am getting the below Error: I have a Publisher SQL Server 2012 on a remote VPS and a local subscriber running on a Parallel VM within Mac. The Agent at the Publisher has full access to the folder....
View ArticleCREATE TABLE not issued on other masters
Database is created on all multi masters. Why CREATE TABLE doesn't being replicated to other masters. some explanations?
View ArticleWhen interrupting a query on a Master, does it replicate to the Slave?
In MySQL, when does the master send a query to the slaves? Here's a specific scenario that I'm trying to understand. Admin entered an update on master that took a long time to execute. Admin hits...
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Galera Cluster with MariaDB 10 and asynchronous slave
As it's easier to understand what I'm trying to accomplish with a picture, here's a picture: I'm really not an expert in database administration, so please be patient. I am working on a setup where I...
View ArticleMySQL slave replicates changes that are in neither binlog_do_db nor...
I have a standard simple master slave replication that usually runs fine. But sometimes, all of a sudden, I get replication errors on the "phpmyadmin" table. I have explicitly only specified one...
View ArticleMySQL Replication Master Slave Architecture - Web app that is based on the...
We are developing a web application (Spring mvc based app) that uses a MySQL DB. (let's call it the "original app") The DB architecture uses a MASTER-SLAVE configuration with replication. The web app...
View ArticleHow to avoid MySQL slave to have errors after crash
I have a MySQL master/slave configuration (MariaDB 10.0.17). Sometimes, the slave or the master server crashes. After the crash and restart, I get some errors of duplicated keys on slave. The server...
View ArticleDuplicate delete query in binary log of MySQL Master
We are facing a strange problem, while replicating data from master to slave. Same data is being deleted twice in log (however, only one row is deleted and one time), due to which we are getting error...
View ArticleIntroduce delay between master slave setup in MariaDB
We're using a master-slave solution using MariaDB 5.5.44. Is there a way to manually introduce an artificial delay between the master and slave? I'm thinking of something like 1 minute or so. Is there...
View ArticleWordPress with massive MySQL database slow. Would MySQL replication help?
Database Administration is usually not my strength, but one friend asked me if I can help him with his project. He is running a WordPress (MySQL) website with WooCommerce. The postmeta table stores...
View ArticleMySQL replication - invalidating query cache entries (table)
We lately moved to MySQL V5.5 on CentOS release 6.7 with master and 2 slaves. Since then the replication process lags a lot behind the master with the line in the process list of: invalidating query...
View ArticleHow to migrate from a MySQL master-slave setup to a master-master setup...
We have an existing master-slave MySQL replication setup where we would like to promote the second slave to a master in order to achieve a master-master setup with no or only minimal downtime. Is it...
View ArticleMongoDB replica heartbeat request time exceeded
I have replica set (hosted on amazon) which has: primary secondary arbiter All of them are version 3.2.6 and this replica is making one shard in my sharded cluster (if that is important although I...
View ArticleIs `log_bin` necessary on slave in master-slave MySQL replication?
I'm running out of disk space on a slave due to MySQL binary logs (mysql-bin.000xxx) being stored on the slave. Here's the relevant portion of the slave's my.cnf: binlog_format = mixed log_bin =...
View ArticleMySQL replication RDS Master - RDS Slave
I have read many posts about replication from RDS to external and vice versa. But my need is actually a bit different. I need to set replication between two RDS instances. Of course I know about Multi...
View ArticleHow to synchronize whole server DB to local and vice versa using SQL Server
We have developed a ERP with accounts and HR modules using ASP.net EF and SQL Server 2012. My clients want to use this web application in online and offline mode. So we need synchronization from local...
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