Questions tagged [master-master-replication]
The master-master-replication tag has no usage guidance, but it has a tag wiki.
44
questions
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0answers
40 views
Why is disk IO higher on Debian 10 (MariaDB 10.3) with MySQL replication?
I have a MySQL/MariaDB master-master replication setup that has been working well for several years, the db and tables are not very large (under 200MB for 18 tables). These were on 2 servers running ...
0
votes
1answer
16 views
How to configure MySQL master master replication but use only one server for writing? [closed]
How to configure MySQL master master replication but use only one server for writing? Is it done at LB end and how? If two users work on same db and same table and they both enter a data into it which ...
1
vote
2answers
23 views
MySQL master to master race conditions, do I need to use transactions/locks for this code?
I'm playing around with master to master MySQL replication hoping I can run two copies on my C# application on two different servers to help improve performance. Rather than the one copy on one server ...
0
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0answers
4 views
Is gtid_ignore_duplicates required for mesh masters?
I want to set up mesh replication with 3 masters. Only one will be active at any time, the other 2 will be at standby working as a backup. The idea is to replicate each from each, in a mesh fashion.
...
0
votes
1answer
29 views
Do I need to redesign my Database and get rid of foreign keys for successful replication?
I plan to set up MariaDB replication either in master-master or master-slave mode. The main issue I have now are worries after reading this documentation.
We use foreign keys a LOT and we also use a ...
1
vote
2answers
130 views
Tuning MySQL on GROUP REPLICATION
I'm close to switch from old version of MySQL 5.6 ( master / slave configuration ) to MySQL 8 ( 3 nodes on multi-master configuration ) in GROUP REPLICATION.
The tables are 99% InnoDB.
The webfarm ...
0
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0answers
16 views
after running Galera Replication for MariaDB , performance (TPS) does huge diffrence [duplicate]
I have two VM machines (with exact hardware-software configuration on two ESXI Servers in same rack and same subnet too) that is running with nginx + PHP-FPM + and MariaDB 10.4.
in each ESXI server I ...
0
votes
0answers
84 views
How to implement master-master replication in PostgreSQL?
I am working on a project which requires my database client to scale horizontally for higher availability but it is required to use RDBMS for our solution. Therefore, we want to implement master-...
2
votes
1answer
185 views
multiple archive_command in PostgreSQL
I have replication with PostgreSQL, so I want to set archive_command = 'cp %p /var/lib/postgresql/11/main/archive/%f' but I also want to save WAL files to another safe place: S3.
So is it possible to ...
0
votes
2answers
651 views
Multi-Master Multi-Region MySQL Cluster
I am hosting an application (a game) in multiple regions around the globe. Performance is critical to this application since it's a game, and therefore I need to host a database instance in each of ...
2
votes
2answers
327 views
MariaDB/MySQL SSL Replication Failure
After searching for a solution for the last 6 hours, I have come up dry in my attempt to add SSL to the replication. I managed to get it to connect with SSL via the mysql command line tool without ...
0
votes
0answers
32 views
MySql 5.7 master-master (restore a master by replication vs dump)
We have MySql 5.7 running in Centos 7 in cloud environment.
We have the master-master working properly. One master gets the writes which replicates to the other master. The second master is a hot ...
1
vote
0answers
1k views
Slave I/O for channel error connecting to master Error_code: 2003
i am trying a master master replication mysql with phpmyadmin using wamp server.
everything seems to be fine, the configuration was well done, so the server is slave and master at the same time ,
but ...
0
votes
0answers
45 views
Do I need client or server cert for mySQL master/master replication?
WE use pkitool to sign any certificate using our own CA and there are two options to sign a certificates:
using --sign, which creates a client-cert
Using --server, which creates a server-cert
The ...
0
votes
0answers
34 views
How can I keep both MySQL databases consistent in master-master replication after recovering from failed event?
I was given a task to fix the sync issue between 2 database servers where I had two MySQL database servers set up with master-master replication. They were working normally but one of the servers was ...
2
votes
1answer
124 views
How to setup two mysql servers with group replication to work individually, when no network
I have two mysql servers in two different places. Both servers must be able to read and write. All tables are designed to based on unique id (UUID) primary key. I want to sync these two databases live ...
0
votes
1answer
182 views
help understanding galera consistency (certification-based replication)
Galera uses a certification-based replication to achieve strong consistency.
While doing a transaction after doing a COMMIT the other nodes will certify it and if is ok it will be successfully ...
0
votes
1answer
230 views
MySQL Replication ignore few columns
I have setup MySQL replication, is there a way to skip replicating one column or multiple columns from few tables?
0
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1answer
129 views
How to solve replication in MongoDB only with two machines?
I have two machines connected in a ring network, each one running Wildfly in HA mode using JGroups ant MongoDB in HA Mode using Replica Set. The machine 1 is the primary and machine 2 is secondary.
...
-1
votes
1answer
144 views
Auto increment gap in percona xtradb cluster master master setup
I was using mariadb 5.5 before but now I have upgraded it and using percona xtradb cluster 5.6
I have 3 nodes cluster. I am only using single node for read and write.
I saw some increment gaps in ...
0
votes
1answer
160 views
What's the difference between Replicate_Wild_Ignore_Table & Replicate_Ignore_Table?
In my site's master/slave setup:
Replicate_Wild_Ignore_Table = %.cache%, &
Replicate_Ignore_Table is empty.
What's the difference between the two?
0
votes
1answer
269 views
Mysql Slave Claims to be Running but New Records Not Appearing and No Delay
I've created a new mysql master and a slave. My master is also a slave of another running instance. The replication between those two works fine so I don't believe my issue is there.
I created a dump ...
1
vote
3answers
922 views
Mysql master-master: single table out of sync
I have a master-master MySQL 5.7, everything works fine except for one error which is rising from time to time.
If I run a show slave status\G on server2 I have an error on a table:
...
Last_Errno: ...
1
vote
0answers
253 views
SQL Server with peer-to-peer replication migration from on-prem to AWS EC2 instances
I need to move three on-prem servers with peer-to-peer replication to AWS.
SQL Server version is 2012. The AWS SQL Server will be on EC2 instances as the SQL Server RDS doesn't support replication yet....
0
votes
1answer
265 views
Master_ master replication on Mariadb
I have a nagios application running on 2 servers, i am planning to have have master-master replication for HA. for master-slave replication, slave should be read-only. in this manner is there any pre-...
3
votes
3answers
629 views
High disk IO with MySQL master-master replication
We've been evaluating an active-passive master-master replication setup for our MySQL database, running on version 8.0. While diagnosing some general slowness issues, we were surprised to see very ...
1
vote
1answer
202 views
Setup replication between two Galera nodes
I've been using MariaDB 10.2 Galera with 3 nodes successfully on local servers. Now, I have a second 3-nodes Galera cluster on another location, joined by an Site-to-Site IPSec Tunnel.
I can't really ...
-1
votes
1answer
158 views
MySQL Replication Relay for Peer-to-peer replication for Multi-master replications [closed]
Any one knows about MySQL Replication Relay for Peer-to-Peer Replication for Multi-master replications?
Please share if you know anything with example and syntax for multiple clients with as masters ...
1
vote
1answer
606 views
Mysql database replication with geo-distributed servers
I am just a developer, who doesn't have deep knowledge in DBA. So need experts suggestions in this.
I have two offline databases in two cities, I want to make a synchronization between two databases ...
0
votes
2answers
487 views
Add database to existing MySQL master-master replication which uses binlog_do_db?
We have 2 Mysql 5.7 servers running in master-master replication mode.
And there is a database replicating between these 2 servers:
binlog_do_db = database1
Now we need to add a new database into ...
0
votes
1answer
189 views
MariaDB 10.2 Encrypted at rest log files not being written
We're running MariaDB 10.2 with InnoDB tables that are encrypted at rest. I've also specified that the log files be encrypted at rest but they remain empty files. The tables seem to be encrypted just ...
0
votes
1answer
356 views
Replicate data between MySQL servers with a different structure
As part of a system upgrade I need to sync a database between 2 different servers (master-master). The catch is that the structure is slightly different between the 2.
Most of the differences are:-
...
4
votes
3answers
4k views
Migrating 300 GB mysql database from one server to another cleanly with minimum downtime
I have a 300 GB mysql database which i want to migrate to another server in order to setup Master-Master replication between the two and my main aim is to achieve this with least possible downtime.
...
0
votes
1answer
434 views
Master-Master replication MariaDB failover resync
I'm working on a project to replicate two sites running MariaDB 5.5 version. Replication works flawless until a host restarts, losing connection still works after reconnecting. When the node restarts ...
1
vote
1answer
1k views
Galera multi-nodes Master-Master issue with READ right after INSERT
I have a multi-nodes Galera setup which is master-master. An API call to a web server A could write data to either database 1, 2, 3 or 4 (we are not using HaProxy). Another API call right after that ...
0
votes
1answer
473 views
Can drbd be used for mongodb replication or active/passive setting?
From this guide we know DRBD can used for PostgreSQL Active/Passive setting:
https://www.howtoforge.com/how-to-set-up-an-active-passive-postgresql-cluster-with-pacemaker-corosync-and-drbd-centos-5.5-...
2
votes
1answer
343 views
Avoiding infinite loop in a master-master replication
As an exercise, I am implementing a master-master replication in PostgreSQL, using triggers (requirement of the task). Basically there are 2 databases with tables that have almost exactly the same ...
4
votes
2answers
3k views
MySQL - Master to master replication without downtime in Live production
I want to setup 2 node master-master replication. Im aware of the point of failiures in this replication. Its a huge database around 1.5TB.
Heavy OLTP is going on. But its mandatory to implement right ...
0
votes
1answer
46 views
SQL Database mirroring \ replication capabilities? [closed]
I've looked through the similar questions, but they are a little further down the line, more into details already.
While I'm still researching the concept of mirroring and what can and can not be ...
3
votes
0answers
617 views
Setup to allow creating new tables in PostgreSQL replica
My goal is to create a replica of an existing database that would allow me to create new tables and populate them. I don't care about writes to replicated tables - those can and probably should throw ...
2
votes
0answers
78 views
Fault tolerant cross datacenter MySQL replication & failover strategy [duplicate]
Which of the following method is the most fault tolerant way to achieve cross datacenter MySQL replication using DNS failover and why?
MySQL master-master replication with one primary/active node and ...
1
vote
0answers
264 views
Master-slave + master-master replication at the same time
Can a MySQL database which is doing master-slave replication to a number of slaves be configured to do master-master replication to a new server at the same time?
I have an application that has a ...
-1
votes
1answer
323 views
Write on MySQL master-master replication
I have set up MySQL MM replication and they work well. I also know that it's not good to write simultaneously on both servers since it may cause inconsistency.
However, I wonder if I write on both ...
2
votes
2answers
11k views
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 ...
