Questions tagged [master-slave-replication]
The master-slave-replication tag has no usage guidance.
0
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1answer
18 views
Where is pt-table-checksum finding this hostname?
The Setup: An EC2 instance running MySQL 5.6 locally replicating to RDS MySQL. The VPC IP address range is 172.0.0.0/8.
Somehow the slave got out of sync and I'm getting this error when I do SHOW ...
0
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2answers
24 views
Effect of --flush-logs on a slave mysqldump?
I have this database setup:
Master -> Slave A
I would like to accomplish the following:
Master -> Slave A -> Slave B
I have reviewed the documentation.
Master and Slave A are both in an ...
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0answers
16 views
Is there any global variable for PostgreSQL replication has configured or not
Is there any unique identifier or any global variable which can tell us if replication is configured in current PostgreSQL server. Other than this query
select pg_is_in_recovery();
The above ...
0
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1answer
25 views
Is there any unique identifier for PostgreSQL? How can the master identify its slave unqiuely?
Is there any way to have more than one PostgreSQL slave servers in the same system.
If yes, how come a master detect each server as different slaves from the below query
select * from ...
2
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2answers
47 views
Change user password on slave
Our users can only access the slave database.
How can I let them change their passwords on their own or when their passwords expire?
0
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1answer
25 views
pt-table-sync: syncing slave from master that has different credentials?
I have a MySQL slave under my full control and a master server where I have only read-only login. Also, logins are different. At some point replication have stopped due to some kind of problem.
I ...
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0answers
6 views
PostgreSQL streaming replication - secondary access
I have read that the streaming replication can be set up so the secondary receives the read only queries, but it is not clear to me how that is "turned on"? With Informix I used a connection manager ...
0
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2answers
60 views
Upgrade Antelope to Barracuda on Slave
I received a Last_Errno: 1118,
Last_Error: Error 'Row size too large (> 8126). Changing some columns to TEXT or BLOB or using ROW_FORMAT=DYNAMIC or ROW_FORMAT=COMPRESSED may help. In current row ...
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0answers
17 views
SQL Server replication model snapshot, transactional and merge - which method can be used
I am trying to implement sql server database replication between 2 branch servers to a Head Office Server.
My application is a distributed one, the main application is hosted on head office which is ...
0
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0answers
41 views
mariabackup --prepare after copying to slave
Hi dear community of smart people,
I'm setting up MariaDB master/slave replication and for the first time I have decided to try mariabackup utility for transferring the full database backup from ...
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0answers
16 views
MySQL: Ignore a Row in a table of a particular Database
I had replication in place between 3 databases, I am trying to ignore a Row in a table of a particular Database. I tried many ways but i couldn't, and also i couldn't find anything in online that ...
0
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1answer
22 views
Is there an option to prioritize a table while replication conflict occurs?
I have a master slave configuration for my production stage environment. Sometimes I need to write to some tables of my stage server i.e slave server. In that case conflicts occurs as content from ...
1
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1answer
40 views
Issue with Time Zone while migrating MySQL on-premises DB to AWS RDS
I am having MySQL 5.6 database with PST time format in on-premises server. Now we are willing to migrate the database to RDS.
For this, we have taken backup from physical server and restored in RDS ...
0
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0answers
14 views
How to reduce replication lag between master slave Aurora MySQL db instances?
AWS aurora MySQL master slave DB instances have high replication lag around 19 millisecond.
Please let me know how to reduce the replication lag time?
0
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0answers
42 views
Error 'Unknown Collation: '2048' on query
I'm doing MYSQL Replication for the first time.
Master mysql version: mysql Ver 14.14 Distrib 5.1.52, for pc-linux-gnu (i686) using readline 5.1
Slave Version: mysql Ver 14.14 Distrib 5.1.73, for ...
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0answers
49 views
mysql drop user has broken the replication
I was dropping a user on master. But that didn't execute on Slave. Instead its broken the replication.
GTID enabled Parallel
replication enabled.
On Master:
Binlog-do-db: prod_db
binlog-ignore-db: ...
0
votes
1answer
40 views
MariaDB replication from master to slave
After doing some research around this topic, I should be attempting this task soon. However, I have two questions going around my head - could do with an experienced professional answering them.
I am ...
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0answers
14 views
mysql cluster with 1 master 1 node and 2 slave
My Query is I want to set up MySQL cluster with 1 Master 1 Node and 2 Slave with Auto failover. If my master is down node should assign slave as a master.
Can anyone suggest me an idea to do that? As ...
0
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1answer
55 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.
...
0
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1answer
27 views
Postgresql streaming replication slow on macOS
I am using PostgreSQL 10.1 on MAC on which I am trying to set up streaming replication. I configured both master and slave to be on the same machine. I find the streaming replication lag to be slower ...
1
vote
1answer
60 views
global foreign_key_checks = 0 on RBR slave
Example schema:
CREATE SCHEMA account;
CREATE TABLE `user` (
`id` INT(11) NOT NULL AUTO_INCREMENT,
`name` VARCHAR(50) NULL DEFAULT NULL,
`address` VARCHAR(50) NULL DEFAULT NULL,
...
1
vote
1answer
281 views
MySQL Replication Slave Status OK but Data inconsistent
We are using MySQL 5.7, and have a Master and 3 Slave servers replication setup. All the 4 servers are dedicated for MySQL use only, and belong to the same data-center, connected over Private Network. ...
0
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1answer
34 views
Can i control access end point When some table data changed In Mysql Semisynchronous Replication
I'm trying to set up One master Multi slave in MySQL 5.7
My architecture is like this.
Master - First slave(sync)
Second slave, Third slave, Fourth slave, Fifth slave(async)
My question is, If ...
1
vote
1answer
44 views
PostgreSQL - Replica Recovery Process Stuck frequently (epoll_wait taking too much time)
We have Master Slave Setup with Asynchronous Streaming Replication (Replication Slots). Frequently our Replica's entire Postgres processes seems to be doing nothing (or stuck?). Since ...
1
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0answers
35 views
How to get the Slave commit timestamp using MySql replication?
I've been looking for ways to collect information about the replication delays on MySql 8. I found an alternative solution, but I imagine there's a more straightforward way to do that.
By reading its ...
2
votes
1answer
198 views
Mongodb replica set primary and secondary node conf fail when one slave is down
In my env, I had created MongoDB replica set conf for high availability so one server fails should be handled by other also in my conf I have 3 DB server and 1 arbiter too but,
my slave's server ...
0
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0answers
30 views
Why slaveDelay is not respected by mongoDB replica?
I've seen related article below:
Mongodb replica config slaveDelay but data still sync immediately
My secondary node is set to be delayed by 3600 seconds:
...
"members" : [
{
"_id" : 0,
...
0
votes
1answer
33 views
Seconds_Behind_Master alternates between 0 and a number x
I have a slave server with mariadb 10.3.10 on debian 9. For several days the server has been working correctly, Seconds_Behind_Master was always kept at 0 indicating that it was properly synchronized. ...
0
votes
1answer
33 views
Master slave replication with different mysql version is on both slave and master
Currently, we have MySQL master-slave replication. Both master and slave servers have Mysql 5.5 Currently I need to add one more Master server having version 5.7.
Is it possible to add Multiple ...
0
votes
1answer
22 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?
1
vote
1answer
37 views
Finding temporary table name in MariaDB
As I reported some days ago to MariaDB bug tracker the following bug: https://jira.mariadb.org/browse/MDEV-17420, slave replicas with version 10.2.x are leaking temporary tables on MyISAM files.
Our ...
0
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0answers
204 views
percona slave ERROR 1872 (HY000)
I have setup PXC on CentOS 7.5 and replication between PXC nodes is working just fine.
However, when I try to set up a slave on one of the PXC nodes, I get this error when I run "START SLAVE".
root@...
0
votes
1answer
46 views
Does the row locking on slave database also apply to master database?
In a transaction, for example,
START TRANSACTION;
SELECT count(*) as count FROM `order` WHERE user_id = 25286 LOCK IN SHARE MODE;
INSERT INTO `order` (`id`, `user_id`, `product_id`) VALUES (NULL, '...
1
vote
0answers
75 views
Cascading binary replication to logical postgres
Im using Postgres 10, and I was wondering if its possible to cascade a logical replication from a binary slave replica? I am looking to have databases with the same data but indexed in a different way ...
0
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1answer
94 views
Create a mysql replication from multiple master and single slave server? [closed]
How to create mysql replication with multiple master server and with single slave server? how to edit the "CHANGE MASTER TO MASTER_HOST='12.34.56.789',MASTER_USER='slave_user', MASTER_PASSWORD='...
0
votes
1answer
27 views
Mariadb 10.1.13 - log positions similar but “seconds behind master” is behind
The setup I have is a master/slave replication, both running Mariadb 10.1.13.
On the slave I noticed that the Seconds_Behind_Master parameter is showing a delay due to some form of lagging, but the ...
0
votes
1answer
67 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 ...
0
votes
1answer
20 views
MySQL how to migrate to new server without data lost?
I'm using AWS RDS, with 1 master & 1 slave.
Just now I alter 1 of the table and hangup halfway, so I force stop the process. Now the database got some problem.
Let say I wanted to instantiate a ...
2
votes
1answer
56 views
Can I stop replication of create/drop index statement on one slave of Mysql 5.6?
I have this cluster where master and slave uses same indexes but one of the slaves has some extra indexes (large machine which runs some analytics queries).
So I have to maintain two sets of indexes. ...
2
votes
1answer
187 views
Master-slave replication doesn't work on PostgreSQL 9.6
I tried to create a master/slave configuration with two servers and Postgres 9.6
I modified master and slave postgresql.conf in /etc/postgresql/9.6/main
Same for master and slave:
data_directory = '...
0
votes
1answer
26 views
Some dates replicated with a +4 offset
I've set up replication between an EC2 instance as master and a MySQL 5.5 RDS instance as slave. Everything is (mostly) fine except for one odd thing: the dates in a transaction table are either ...
1
vote
1answer
64 views
Replication of databases with specific prefix on master
There are options to dynamically set variables on replication slaves, like replicate_wild_do_table and replicate_wild_ignore_table.
But, are there any options for replication master to dynamically set ...
0
votes
1answer
74 views
Master DB Ran Out Of Space
My master server ran out of space today (at 20:22). My transactions logs ended up broken into multiple files:
-rw-rw---- 1 mysql mysql 228M Jul 31 20:22 mysql-bin.000914
-rw-rw---- 1 mysql mysql ...
2
votes
1answer
391 views
MySQL Replication binary relay logs transfer too slowly
Master server
MySQL 5.6.28
Ubuntu 14.04
8 core CPU
Slave server
Slave: MySQL 5.7.22
Ubuntu 18.04
16 core CPU
Both of them have 64GB of RAM and plenty of disk space.
What I did up to this ...
0
votes
1answer
321 views
MariaDB master-slave replication failover and failback
I'm trying to configure a DR instance of MariaDB (10.1.13) using master-slave replication.
I was able to establish the master-slave relationship with GTID by locking the tables on master, backing up ...
0
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0answers
92 views
Add new slave in MariaDB Replication
I have a Master server (A) and a Slave server (B). B is getting replicated from A [all the dbs (db1,db2,db3) except few tables]. Now, I need to add one more Slave but It has to replicate only db1 and ...
0
votes
1answer
163 views
PostgreSQL Slave keeps xlog files with replication slot
I setup one master and two PostgreSQL servers (v9.6). In the master (and slaves) I set max_replication_slots = 2 and archive_mode is commented out everywhere. The replication works fine: There are no ...
0
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0answers
33 views
percona mysql key_buffer_size value on replication slave
I noticed way odd behavior of replication slave due to altering key_buffer_size parameter.
I have 5.6.39 version of percona mysql and RAM 257671MB, according to the articles in the Internet i ...
1
vote
1answer
180 views
Why is MDB 10.2.14 not handling deadlocks properly when it did prior to upgrade from 10.1.22
Since upgrading MariaDB 10.1.22 to 10.2.14 our MariaDB slaves are encountering deadlocks that are not handled in less than 600 seconds thus the classic semaphore decision to crash the server. The ...
0
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0answers
235 views
Master-slave replication in MariaDB
I worked around with Master-slave replication in Mariadb 5.5.52 on RHEL 7.3 environment.
Master:
[mysqld]
log-bin
server_id=1
binlog-do-db=nagios
binlog-do-db=nagiosql
binlog-do-db=nagiosxi
bind-...
