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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TDE on Replicated Databases

I have implemented Master-Slave replication between two databases, now i have to implement Transparent Data Encryption(TDE) in master database. is it possible to implement TDE in master only? whether ...
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Table does not exist even if there is one

I have MySQL master-slave replication setup in Amazon EC2. For the sake of resilience, I have set up LVM on RAID 10 array, on both master as well as slave. I have been using ec2-consistent-snapshot ...
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Replication of specific tables using Postgres 9.4.4 and Amazon Web Services

I have currently setup a Postgres 9.4.4 RDS instance on Amazon Web Services. On this instance I hold 20 tables. In addition I also have Postgres 9.4.4 installed on my local server (OS: 64-bit Linux) ...
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Transactional replication taking hours to replicate

I have a bunch of tables replicated from my_publisher to my_subscriber via my_distributor. Some of these tables, not all of them, when updated on my_publisher, take a couple of hours to be updated on ...
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Anyway to identify mysql slaves have read upto which binary logs

I have multiple slaves reading from one master.. But few of them are keep disconnecting due to network issue. Is there any way that i can make sure before setting up the bin log purging script on ...
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Disaster recovery solution for MySQL

I have set a Master-master replication with the second Master running as read-only. This master-master setup is on the same location. Now I will have to setup an DR for this production at a different ...
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Setting up MySQL master-slave replication

I am trying to setup master-slave replication on MySQL 5.6. When I update my database in the master, the change is not reflected on the slave. When I show the process list on the slave it shows this ...
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How to:: Master-Master replication

I have setup Master-Master replication on two servers. Now, my question is that if I need to have the second master as only read-only, what should I do? I tried doing mysql> flush tables with ...
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Doubt on Master-Master replication

I'm setting up a master-master replication where in the second master is only read only there by reducing the issues of conflicts. My doubt is that to reduce the downtime when my master goes down I ...
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replication filtering replicate-rewrite and do-table Mysql 5.6 (innodb engine )

i have a master / slave replication setup based on statement based replication. On master database name DB1 , i have 5 tables and i want to replicate only two table on slave's database name DB2. Also ...
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mysql master master replication, master log position not changing

I have setup master-master replication on database set on two servers (say 1.1.1.1 & 2.2.2.2), I have edited the my.cnf file to: server-id = 1 log_bin = ...
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Automatic replication on slave node after service restart

I am new to mysql administration. we have master - slave replication environment. I added a 2nd slave node to existing env [master-slave] and replication is successful. Whenever I restart the mysqld ...
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innodb_autoinc_lock_mode

We have a scenario. We are migrating from master running MYSQL 5.5 statement based replication with innodb_autoinc_lock_mode=1. We have made our new master (in RDS MYSQL 5.6) a slave of old master. ...
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MongoDB to MySQL Replication Automatically

i have Mongodb server and mysql server. i want to use mongodb for "write" and mysql for "read". so i am looking for some tool or some process by which we can tranfer mongodb to mysql server on ...
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Upgrading the mysql server from 5.1 to 5.6?

My server have CentOS6. Currently I'm are using the Percona 5.1.47 version. Would like to upgrade to 5.6. What is the best way to do, and what are the prerequisites to keep in mind before doing ...
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Is it ok to use 4 application server against one database server?

Initially I have two database server (Master Master Replication config with Haproxy load balancing) A and B. And two application server say P and Q. Both P and Q is pointed towards A will move to B ...
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62 views

MySQL slave server getting stopped after each replication request from Master

Basic master-slave MySQL configuration has been done on Windows machine. Master and slave servers are running on localhost with different ports. Now when executing update or insert in master server, ...
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Diffrences between master and slave replication in mysql?

In a database named asterisk, there is a table named cdr which was partitioned on the time field. mysql> show create table cdr; Create Table: CREATE TABLE `cdr` ( `gid` bigint(20) NOT NULL ...
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mysql master/master replication problem

I am having a problem with one of my MySQL servers running CentOS 7. I have it almost setup with a master master replication status. But I keep getting this: MariaDB [(none)]> show slave status\G ...
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Any risks in updating the system time on a mysql 5.5 server?

We just discovered one of our mysql systems has not been running ntp, with the result that the time has drifted a bit. If I enable ntp, and synchronize the time while the system is running are ...
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enable log_bin_use_v1_row_events in mysql 5.6

I have a MYSQL master with two slaves also running MYSQL 5.6. I want to create another slave and that needs to be MYSQL 5.5. I was wondering if replication will work smoothly. I have ...
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Remote MySQL host - is connecting to remote port 3306 vulnerable?

Hello experienced colleagues, I have a web application built on a MySQL database. I need to run another copy in a remote location, and refresh the data weekly. The size of the refresh is about 500k ...
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MySQL Circular Replication

I have this scenario where I have 4 MySQL servers (A,B,C,D), as this: Server (A) is always online, and serves as the main website. Servers (B,C and D) are online on random periods of the day, and ...
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MySQL Master-Master Crash-Safe Replication: Slow UPDATE times

Environment 2 MySQL version 5.6.26 Dedicated MySQL Servers connected on a LAN. Servers Have 16 Cores with 32 GB RAM each and are really fast. Master-Master Crash Safe Replication is setup on both ...
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How to set ALL the replication to DEADLOCK_PRIORITY LOW?

I have just got this email here: Then looking at the sql server log I find this deadlock was caused by one of our procedures (that was the victim) against the replication. O.K. in this case in ...
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Can mongoDB split read and write, with primary on HDD, replica sets on SSD?

I have three machines, each machine both has SSH and HDD, I want to save SSD space, and in my env: less write, lots read. So does mongoDB support splitting read and write, with primary on HDD, replica ...
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Switching replication master in cascading replication scenario

Imagine I have 3 PostgreSQL 9.3 databases (A, B, and C) set up in a cascading, streaming replication scenario (i.e. am NOT manually shipping WAL files, am having Postgres ship them over TCP ...
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MySQL - replication. Do slave DB schema need to resemble master

I want to do wildcard replication in mysql. I want to replicate only one table (say T1). The database in master and slave are different. Only the T1 is common between the two database. can this be ...
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SymmetricDS scheduled sync

I am trying to configure SymmetricDS to run a scheduled replication from one postgres database to another. I've seen people suggesting doing that by setting these fields in node config: ...
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MySQL - replicate some tables between transaction and report database

I have two different database (on two different hosts). One database is transactional and another database is reporting. Let us say, it stores information about departments and their employees. ...
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Mysql privileges and replication

I want to recreate the whole privilege system in my database, and that includes the slave user on the master. It means i have to stop the slave, run a set master command again and than start it. My ...
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Why is replication stopped?

Got the following nagios alert this morning for our MySQL replica: 14:49 PROBLEM: mysql2/MySQL replication check is CRITICAL, 10.1.0.133 is 72870 seconds behind, Aug 09, 21:49 UTC When I look at ...
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Backup a large postgres database for PITR

I have one postgres 9.1 master and 2 slaves setup with streaming replication with WAL archive. Now, I am trying to set up for PITR for at least a window of 1 week. This is to cover for any ...
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How to detect MySQL slave writes?

In a MySQL master-slave replication architecture, how do you detect if there have been (erroneously, since this should never happen!) direct writes on the slave? For now, I'm running this command on ...
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MySQL transaction and replication between two datacenters

I'm using a master MySQL in an east coast data center and want to setup a replication server on a west coast data center. The app server on the west coast may at times need to write to the master. ...
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63 views

Why is SAN Replication is Causing Random Database Corruption?

Having a strange issue with a disaster recovery technology we're trying to implement. The environment in both datacenters is the same having VMWare and Dell Equallogic SANs, which are the same ...
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MySQL Replication: How to restore master FROM slave?

TL;DR: given a master/slave setup between two MySQL databases, where the connection from the master to the slave is read only, how can you restore the master from the slave in the event of a failure ...
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Best approch to replicate data from one db to other db on same server

I am facing issue of time out and slow data response so I did search on Google and found that I could create a server which replicates main database data to secondary database and both on same server ...
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Replication stops with GTID_NEXT error after creation/drop of memory table in mysql5.6

We have recently upgraded to mysql5.6.25 from mysql5.5.x/mysql5.1.x on our mysql-cluster. Below is a brief snapshot of our architecture. Since we have upgraded and enabled gtid-mode we have been ...
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Replication with fail over cluster in SQL Server 2014

Presently I am Using Replication Feature in SQL Server 2012 .I want to migrate to SQL server 2014 .I want to use fail over cluster feature .Does it effect the replication feature which we are using ...
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MySQL - Seconds shown for query run time is incorrect

I came into work this morning, and first thing I noticed is that one of my Slave databases was running behind. I took a look at the processlist and could see that I had the following running. SELECT ...
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1answer
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Postgres streaming replication between hosts with different timezone

I am running Postgres 9.1 on Windows 2012 servers. I am using postgres's streaming replication to replicate data between 2 servers. It has so happened that the time zone of the slave has not been set ...
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What is happening when Seconds_Behind_Master oscillates between two very different sets ov values?

I have a Percona 5.6 slave, newly set up, that is replicating from a server that is itself a slave to a third. The middle server (dbS2, the master for dbS3) is currently ~260000 seconds behind the ...
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sql server replication - how to find and drop subscriptions?

I had 2 subscriptions to a publication, but they were from the same subscriber server and writing to the same subscriber database, just one was bad and one was running fine. I could not find a ...
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1answer
77 views

Secondary and Arbiter stuck in Startup

I'm using MongoDB version 3.0.0. I'm trying to setup mongodb replication on our machine. Replication was initially setup but due to some changes on the VM the entire thing crashed. When I tried to set ...
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MariaDB multi-master replication (star topology) - Bizarre out-of-sync behavior

This may look familiar, I've been learning about this stuff for a few days - but this is a new question. I have a setup like this: Every node is a master, and I have them all replicating to each ...
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Options for copying data out of continuously updating tables

I work with a pretty large (O(10^1) TB) DB2 (LUW, v. 9.7) database. It's got data coming in on a continuous basis via Golden Gate replication from another DB2 database. It's used for business ...
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sql server replication - how to get combination of values from a binary(8) field?

I am using the table sysschemaarticles to collect information in my transactional replication. It is used for a variety of things including adding new articles and finding out who are the subscriber ...
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Demoting a MySQL Master to Slave [closed]

I recently had to fail my master over and promote a slave due to a network outage. All of that worked fine. Now that the network is back, I'd like to add my old master as a slave of the new master. ...
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How to have remote standby PostgreSQL server in different location (AWS)?

We have a primary PostgreSQL 9.4 server running multiple instances in our DC. It is using Continuous Archiving via WAL-E out to AWS S3. I would like to have a hot/warm standby server in our VPC within ...