Questions tagged [master-slave-replication]
The master-slave-replication tag has no usage guidance.
204
questions
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5 views
Pgpool create a cluster node with no application traffic
I have a pgpool cluster with 2 standby and 1 primary node. I am trying to create another node which will get replicated but will not handle any request or application traffic. It will solely be use ...
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0answers
14 views
Make slave has same “general_log” table like master server
Apologize for my English. I'm very new to database administration. I've been trying to set up MariaDB replication server by following this document.
The only data that I need to replicate is in a ...
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0answers
20 views
Binlog is not being updated in Master
I am using mysql 5.6.19-log MySQL Community Server (GPL). I have done the necessary changes in my.cnf to start Master<->Slave Replication. But binary files are created and but they are empty.
...
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1answer
22 views
Mysql 8.0.22 master slave replication: why slave is trying to create user?
I am following this repo (https://github.com/alexanderfefelov/docker-mysql-replication) to setup one master one slave replication. I am not able to get it working. The master seems to be OK, but the ...
0
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1answer
29 views
mariadb: replication master and slave have equal MySQL server ids
I'm a novice mariadb user trying to set up a master with multiple slaves using mariadb-10.4.17 on fedora33.
I believe at one point I inadvertently ran the "change master" command on the ...
1
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2answers
46 views
Change host IP of master in mysql replication
I have one master and one slave. Suppose IP of master is changed but the physical server is same. Now I want to update the new IP (of the master) at the slave server. At the slave server ...
1
vote
1answer
16 views
Postgres 10 Log Shipped Replica with cascading replication
I'm planning for a tricky (at least for me) migration whereby I have master postgres 10 db from a cloud provider that will not allow for replication user connection. I do have a base backup and WAL ...
1
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1answer
14 views
MySQL DB as Master for some tables and Slave for others
I have 2 DBs - DB1 (back-office) and DB2 (web application). The data needs to be synced between the 2. I'm happy with the idea of full master-master replication and may have to implement it, but ...
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0answers
37 views
How to hot merge MariaDb databases from multiple servers into a single one
Current Configuration
I currently have 3 servers:
server australia with the database canberra
servers belgium and germany are a galera cluster with the database bruxelles.
Target Configuration
My ...
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0answers
21 views
Dump sql cloud mysql instance for external replica
I followed this guide to create an external replica of a cloud sql server: https://cloud.google.com/sql/docs/mysql/replication/configure-external-replica.I am getting this error when I try to start ...
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0answers
30 views
High Available PostgreSQL with Patroni and Replication
I want to build a highly available PostgreSQL cluster using patroni with etcd. I want to have 3 server (1 master and 2 slaves) in my cluster, so if something goes wrong one of the slaves automatically ...
2
votes
1answer
51 views
MariaDB - Replication - Unable to login remotely
So I've been trying to configure MariaDB replication for our server. Unfortunately I cannot get it replicating correctly.
So I've followed the MariaDB guide to the letter to get replication set up. ...
1
vote
1answer
22 views
Why is it not a good idea to use MariaDB's extra_port for replication?
MariaDB has an extra_port for administrative access that helps in cases the thread pool or main port is locked up.
MariaDB's documentation says it's use case is primarily administrative access and it ...
2
votes
2answers
48 views
What is the maximum latency / distance mysql replication can tolerate without having errors or wrong data?
I have two machines in a master - slave replication. I want to know if they are in two seperate places e.g. London, England and Tokyo, Japan are there going to be any latency issues.
What exactly is ...
0
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1answer
15 views
Fault tolerance for Database sharding and Database partitioning
I'm aware that database sharding is splitting up of datasets horizontally into various database instances, whereas database partitioning uses one single instance.
In Database Sharding, what if one of ...
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0answers
18 views
Mysql replication is running poorly on one of the slaves with no apparent changes
We have been using a master with 2 slaves for as long as I can remember with no major issues. Both slaves are lower in specification than the master so I do expect there to be lags at times and have ...
0
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0answers
18 views
How to turn on GTID on MariaDB if already using binary/position replication?
MariaDB 10.3
current master config
[mysqld]
log-bin
server_id=1
binlog-format=mixed
expire_logs_days=10
current slave config
[mysqld]
log-bin
server_id=2
binlog-format=mixed
expire_logs_days=10
I ...
1
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0answers
51 views
Getting error while starting slave on MySQL slave./ Backups in MySQL 8.0.20
I want to set up below command for daily MySQL database backup.suppose We have more than 50 MySQL database in server.
I am using below command to take backup of all databases on server.
Note: I am ...
0
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2answers
155 views
Broken Slave MySQL : How To Fix MySQL Replication (BINLOG) error in the Slave?
Before we start I can give some info about the versions,
Ubuntu - 14.04, MySQL - 5.5
I have successfully configured the Master-Slave replication with two EC2 Ubuntu instances. My master is in Ubuntu ...
0
votes
1answer
17 views
slow wal replay in backup postgres12 server
We have the following PG12 setup with Master, replica and readonly replica with archive.
master and replica both has 2cpu, 4gb ram
readonly replica with archive has 2 cpu, 2gb ram
below you can ...
0
votes
1answer
29 views
PostgreSQL pg_rewind use cases
Let's say that I configured streaming replication between Server A (master) and Server B (slave). If server A goes down and Server B is promoted, would I be able to use pg_rewind, where Server B is ...
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0answers
83 views
PostgreSQL Streaming Replication with Switchover
I'm trying to provide streaming replication between a master (T1) and slave (T2) and swapping their roles when necessary (i.e letting T1 be a slave to T2). So far I am able to get this working if I'm ...
0
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0answers
33 views
MySQL 5.7 Master-Slave Replication Functional but Not Replicating New Records
I've got a Master-Slave topology set up with the following two servers:
Master Information:
OS: GNU/Linux Centos 7.6.1810 (Core)
Kernel: 3.10.0-042stab140.4
MySQL version: 5.7.25
Server_id: 1
Slave ...
0
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0answers
146 views
Mysql 8 Replication and promoting slave to master
I am not using GTID based replication and I have only one master
and one slave. This question is in general regarding Mysql 8 and I want to
be prepared when I have to deal with production systems. I ...
0
votes
1answer
35 views
Postgresql Streaming Replication on Windows failover
Hello i have setup streaming replication using PostgreSQL 11 on Windows working OK.
How can i manually use the replica ( it is hot_standby=on ) in case Master fails ?
What are the steps i have to ...
0
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0answers
153 views
Mariadb replication slave broken
I run Mariadb 10.3 on a Debian 10.3 server. The database was standalone until now and worked fine. Now I want to set it up as a replication slave. I use this as a guide:
https://www.linuxbabe.com/...
0
votes
1answer
31 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
1answer
34 views
SLAVE off when loading data into the MASTER from another database
I have an active MASTER/SLAVE replication (Mariadb 10.2) with a single database (see scenario 1)
I decided to add in IMPORT database to populate the MASTER database as described in scenario 2. ...
1
vote
2answers
43 views
MySQL replication master-slave
I'm learning master-slave replication with MySQL and I could get it to work and also use the Percona backup tool to restore a slave. I learnt from this project https://github.com/vbabak/docker-mysql-...
0
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0answers
74 views
PostgreSQL Streaming Replication: no pg_hba.conf entry for use from host
I have been trying PostgreSQL streaming replication for couple of days using link https://www.percona.com/blog/2018/09/07/setting-up-streaming-replication-postgresql/
I have edited my master pg_hba....
0
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0answers
114 views
MySQL8.0 Replication Got Stuck “Applying batch of row changes (delete)”
When I configured Master-Slave replication it was working fine but after five weeks it is showing the following error.
*************************** 1. row ***************************
...
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0answers
29 views
Mysql Replication-Master and two slaves
I have one master and 2 slaves,one is replicating but another slave which is read-only not replicating.
From Master :
show master status;
+------------------+----------+--------------+---------------...
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0answers
151 views
PostgreSQL streaming replication, incompatible locales between different systems?
I have a PostgreSQL 11 server on a windows 10 machine. That machine is used in a harsh environment, and a win32 client program is used with it. That program requires cp1250 charsets. The windows is a ...
1
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0answers
95 views
How to check RDS MySQL database synchronization status
We were creating a read replica for an RDS MySQL (5.7.28) instance, and before the read replica became available one of our developer accidentally connected to the read replica and was able to write ...
0
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1answer
13 views
Replication members count limitation in MongoDB
Is it possible to configure only one secondary and one primary in MongoDB Replication?
1
vote
1answer
166 views
Can a MySQL 5.6 master replicate to a 5.7 slave, which in turn replicates to a MySQL 8 slave?
According to the docs, "MySQL supports replication from one release series to the next higher release series. For example, you can replicate from a master running MySQL 5.6 to a slave running MySQL 5....
0
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1answer
14 views
question about MySQL5.7 server(Master) and a MariaDB 10.3(Slave)
I have question:
I want to install a MySQL5.7 server(Master) and a MariaDB 10.3(Slave).Replay SQL(select and update) on the slave server after SQL running on the master server.get slow sql log on ...
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0answers
15 views
Calculating Total Time Taken to Replicate
I wanted to know whether there are any open source tools or in built functions for generating replication metrics. Basically i wanted to calculate the time difference between changes in the Master vs ...
0
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1answer
21 views
How to add/update data from slave server to master server in MariaDB?
I am experimenting on whether I can tweak the functionality of master-slave replication. I can write data in my master server which gets updated in the slave server but it cannot happen the other way. ...
0
votes
1answer
123 views
Setting connection collation in master for slave replication
I am trying to replicate a MySQL 8 server (master) to MySQL 5.7 (slave) instance. I know it is not officially supported, but the thing is we need to use a service that has only supports MySQL 5.7.
I ...
1
vote
1answer
35 views
MySQL replication not finished on next site call
I have 3 MySQL8.0 instances. Two of them are slaves. Each site call I‘m reading the slave till the first write Request is made. Afterwards Only the Master is used during the request. Now, if I write ...
0
votes
1answer
360 views
MySQL 8.016 master with MariaDB 10.2 slave on AWS RDS, Character set '#255' is not a compiled character set
I have a MySQL 8.016 master and a MariaDB 10.2 slave, both running on AWS RDS. This was working perfectly until today, when I figured I wanted to do chain replication instead, like this
MySQL 8.016 ->...
0
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0answers
29 views
Alter Table operations blocks replication in MySQL
We are using Amazon Web Service's MySQL 5.7.26 with 4 read-only replicas. After some Alter Table operations we have found that the replication stops working. The symtoms are great replica lag that is ...
0
votes
2answers
283 views
MySql replication failed with error 1236 data position > file size with relay-bin file not increasing
My slave machine reset and now on SLAVE SHOW STATUS\G I have the error:
Last_IO_Error: Got fatal error 1236 from master when reading data from binary log: 'Client requested master to start ...
0
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1answer
145 views
Renaming multiple databases on a MySQL slave
I have 4 mysql databases that I'm replicating from a master to a slave. In the past, I have renamed one of them because the slave is also a dev server where it has a dev version of that schema with ...
1
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1answer
671 views
Replication Hung - Seconds_Behind_Master Increasing
One of my slave is no longer replicating. The seconds_behind_master continue to increase, Exec_Master_Log_Pos does not increase, and Relay_Log_Space does increase. Slave_IO_Running and ...
0
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0answers
26 views
create backup on mysql master-slave
I have MySQL version 5.7 with a master-slave configuration. but I'm confused to make a backup cron. Is there a way to do a backup while remaining safe to master-slave? I heard that using mysqldump is ...
0
votes
1answer
171 views
PostgreSQL 9.6 pg_rewind - takes a long time to replicate
I use Streaming Replication,and Replication works normally.
Two servers are HA and PostgreSQL DB is replicated.
The data in the DB is about 40G.
When a failover occurs, the slave is successfully ...
0
votes
1answer
101 views
How to resynchronize replica in Postgresql
I have a server with Centos6 and Postgresql 9.2, I have set up a replica in postgresql to another server of the same characteristics, today in the morning I have an error in the archiver process on ...
0
votes
1answer
75 views
mysqldump generating inconsistent dumps
I cannot get mysqldump to generate a dump that will properly restore. The dump is being generated to setup a new slave, but whenever the slave starts up, it gets foreign key constraint failures.
I'm ...
