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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9i streams capture doesn't evaluate rules

I have a streams replication set up between two oracle 9.2.0.8 instances as sources and an 11g instance as a destination, processing a small subset of data from each database (let it be one table ...
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549 views

SQL Server 2014 Replication - The process could not connect to Subscriber 'xxx'

I have just set up very basic transactional replication on SQL Server 2014. The Publisher and Distributor are one and the same. I have configured the Publisher to push to the Subscriber, so any and ...
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110 views

Postgres multidisk master replicating to single disk slave

I have an odd situation. I have a postgreSQL database master with multiple large tablespaces divided across 3 physical disks. I am setting up a slave that will be used to offload long, ...
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203 views

Conflict handling, SQL Server 2008 R2 Peer to Peer

I have a Peer to Peer replication topology set up between two SQL Server 2008 R2 servers. I was doing some testing on fault tolerance and conflict handling. I have conflict detection enabled, and ...
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55 views

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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44 views

SQL Job Step created via wizard does not correctly set server & database_name values

I've recently been tasked with migrating a database from SQL Server 2005 to 2008R2. This has all been accomplished without any issues, but one part of the system requires a Snapshot Replication to be ...
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160 views

Postgres Streaming Replication: How to re-sync data in master (with standby) after failover

I am absolutely new to postgres 9.1 replication mechanisms. I have managed to set up streaming replication between a master and standby postgres (Both have x number of records). At one point when ...
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133 views

Recovery when failover

1/ Description: I have 2 Centos machine: master, slave (streaming replication). Both of them are built on PostgreSQL 9.3 (image below) and configured failover event (failover PG 9.3 document). Last ...
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194 views

Replicating databases for local and cloud instances

Forgive me if this is an inappropriate place for this architectural question but I'm not sure where it best fits in the StackExchange family. I have been tasked with developing an online/live auction ...
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125 views

Once in a while synchronization of the independently updated mysql databases problem

I have a production database and a test database running on MySQL with MyISAM and InnoDB tables, which are updated independently. The Production database is updated by system and sometimes by a user. ...
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488 views

SQL Server Replication :: Dedicated Distributor Hardware Requirements

Does anyone know any rules of thumb (or better) with regards to hardware requirements for a dedicated distributor server? i.e. Based on estimate metrics (e.g. number of subscribers, publishers, ...
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84 views

How Much Overhead Does Web Sync Add?

I am running merge replication in SQL2012 using web sync. Has anybody done any experiments to compare the performance of web sync to connecting to replication using a straight TCP/IP connection? ...
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445 views

SQL Server 2008 replication scenario

First of all sorry about my english, and most importantly, my database ignorance, I'll do my best ;) Until now, the scenario that I have is as follows: In a server under our LAN, we have a database ...
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40 views

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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33 views

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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23 views

PostgreSQL Streaming Replication Tools - Windows

Is there any clusterware available for PostgreSQL clusters running on Windows OS? I'm specifically interested in automatic failover and STONITH functionality. I've done a fairly extensive Google ...
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39 views

SQL Server 2012 replication setup on routed network

I'm trying to setup replication between two SQL Server 2012 instances. I set up a publication successfully on server1, but then I had a problem when trying to access it from server2, because the only ...
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44 views

How to verify replication data integrity in SQL Server when using external replication engine

I am looking for a way to verify that data I am replicating between SQL Server databases is making it to the destination OK. Data is being replicated using an external replication engine, no built-in ...
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20 views

Transactional Replication breaks when schema is changed in Publisher

We have set up Transactional replication where in two Publishers feed into one Subscriber , now if try to change the schema of any one Publishers or both publishers, replication breaks. We have ...
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144 views

Transactional Replication in SQL server 2014

We need to set up transactional replication in SQL server 2014, Enterprise edition so that: Database to be replicated from Publisher which is approximately 2 TB in size. This would be used 24*6. Here ...
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49 views

After restarting Mysql replication, Slave commands are executed

up vote 0 down vote favorite I have a Mysql Master Slave Replication which is working fine. Unfortunately I got some serious problems on my slave and the only chance I saw was to restart the whole ...
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444 views

SQL Replication With Always On Availability Group

We have an always-on SQL 2012 availability group with two replica servers and an AG listener. Doing merge replication via anonymous subscriptions through IIS between SQL and multiple remote clients ...
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103 views

How can I avoid breaking Postgres sync replication when building a large index?

We have pairs of Postgres 9.2 servers using synchronous replication. Sometimes rebuilding an index on a large table will break replication due to WAL segments not being kept around long enough. We are ...
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100 views

Domain name change of SQL servers involved in replication

I have a situation where client wants to change their domain name of servers hosting SQL Servers(e.g. from AB to CD). I have a transactional replication with updatable subscription configured with 1 ...
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824 views

Is there a way to replicate Postgres databases in Amazon RDS between regions?

We have a Postgres RDS instance in the AWS Oregon Region. For some supposed legal reasons, we have to host our client's European data in the Ireland AWS Region, but we need that data synchronized to ...
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69 views

Postgres Replication From Different Masters?

I'm getting a Postgres 9.3.3 install sorted out. My application is Drupal (so read/write), but low-traffic, so all application traffic is sent to the primary master. I have two sites (main and ...
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32 views

Is it possible for unique key to break master-master replication in mysql?

I have a master-master mysql setup with 2 servers running the exact same application making writes to such a table: CREATE TABLE `metric` ( `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT, ...
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81 views

SQL Server 2012 Replication

Please help me out with a problem I am facing. I have a table T. I altered the table to alter the column C from varchar (10) to varchar (100). Now, there is a view V that is schema bound and selects ...
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166 views

Replication slave re-reading WAL on restart

I have a standard streaming replication setup going with PostgreSQL 9.1. It works fine. However, if I stop the slave cleanly (to move it or perform other maintenance) and restart it a short time ...
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455 views

MySQL replication error 1146

Any idea why there is '1146 - table doesn't exists' on 'CREATE TABLE IF NOT EXISTS...' statement. It actually happened only on one of the slaves (there are two in total): Last_SQL_Error: Error 'Table ...
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489 views

oracle streams apply: how to get a reason why LCR message was not applied

I've set up bidirectional oracle streams replication (11gR1) using identical scripts on both machines (DB1 and DB2). Although changes from DB1 are being applied to DB2, changes from DB2 to DB1 aren't. ...
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62 views

How to Remove Articles Based on User

I am using merge replication on SQL 2012. I have a very large database with a large number of tables. The subscribers are using netbooks. I have a filtering scheme that controls which tables end up ...
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345 views

Upgrading Remote Distributor in SQL Server Replication

I'm upgrading my remote distributor from 2005 to 2008r2, it is performing transactional replication only. this is a prerequisite to completing an upgrade of the Publisher to 2008r2. Script ...
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366 views

What is causing all of the msrepl_tran_version columns to become out-of-sync between locations in transactional replication setup?

I have been having a recurring issue with transactional replication setups at the firm I work for. We use SQL 2008 R2. Seemingly without warning or any replication errors, all of the ...
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18 views

Table replication with extra TIMESTAMP column on slave

I have a table on master and same table on slave with an extra column like InsertTime timestamp DEFAULT CURRENT_TIMESTAMP I want to keep record of time when there is update on slave. Replication ...
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22 views

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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35 views

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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17 views

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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59 views

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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26 views

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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48 views

Master/Slave and Master/Master replication - MySQL

What is the difference between having a master-slave replication and having a master-master( where in the second master acting as hot-standby - active-passive) replication? Also, what are the issues ...
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19 views

MongoDB user account required for arbiter?

I have a test environment with two mongo v2.6.5 instances (#1, #2) and an arbiter instance in a replica set. I have a a common key file configured for all three instances. I have created an admin ...
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53 views

DatabaseRestart

I have strange problem, we are using circulation replication, between 2 different network with 5.6.25 and 5.6.22 version of MySQL and RAM is 64GB with 45GB innodb_buffer_pool Master Server is running ...
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26 views

Keep selected tables synchronized across MySQL databases

I've a need that requires me to keep a number of tables from a database (db1) synchronized with another database (db2). db1 & db2 have different structures and a set of tables and their data from ...
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32 views

Can PostgreSQL with synchronous streaming replication get behind on the WAL logs?

I have 2 Postgres 9.4 servers running on 2 identical VMs that I am using to learn how to setup replication before it gets used in production. Hot standby isn't required but it would be preferred. I ...
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32 views

Replication Data Issue

After configuring replication all the data from tables has replicated from publisher to subscriber. Now my requirement is whenever I insert new record in publisher only that record should replicate ...
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52 views

BDR Replication issue

I am trying to setup 2-node BDR replication and i am getting the following error while running bdr_init_copy. /usr/pgsql-9.4/bin/bdr_init_copy -d "host=10.10.145.111 dbname=apimgtdb port=5432" ...
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134 views

Replication slowness: massive MSrepl_commands table?

Background: I have a SQL Server 2005 transactional replication setup that pushes normal traffic fine, but occasional larger processing batches have been a problem. Obviously the changes take longer ...
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51 views

Setting up multiple databases in Vagrant

Currently I am using Vagrant 1.4.3 in-conjunction with VirtualBox running Unix (Centos) for my development server (using MariaDB). I didn't setup the box myself (so my knowledge of setting this up ...
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Replica Set In Mongo Are All Primary

So I saw a thread on here for when all the replica sets are Primary. The fix was to do rs.Add(hostportStr) on the master server before you do rs.initiate() on the server you want to become a ...