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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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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Mysql multisource replication : on slave map masters dbname to something like mastername-originaldbname

I need to implement a mysql multisource replication using mysql >=5.7.11, there are already a certain number of mysql servers running which will become masters for the single slave which is going to ...
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18 views

Error : failed to Retrieve data for this request when expanding subscriptions in SQL Server 2008

We are getting error when expanding subscriptions to delete them, we have already dropped distribution database. The error text is Failed to Retrieve data for this request. Microsoft.SqlServer....
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19 views

How to convert MySQL master-slave to master-master

I've searched around, but can't find the exact details to point me in the proper direction. I currently have 2 MySQL instances under 5.5.41 running as a master-slave setup. I followed these ...
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27 views

SQL Replication Monitor does NOT show publication properties - Transactional Replication

The setup I have is as follows: a) Version SQL Server 2014 SP1 CU6. b) publication is on a separate availability group [AG1] and subscriber is part of another AG [AG2]. c) Distribution is ...
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43 views

MongoDB insert not replicating after db.dropDatabase()

I'm new to MongoDB (inherited a project using it), so this is especially confusing. I have a sharded replicaset between 3 ec2 instances. Everything works fine until I drop a database. The database ...
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57 views

NOLOCK vs Read Uncommitted

in our environment, reports are running on the subscriber and resulting in deadlocks with MS Replication SPs, which are doing inserts/updates. What's the best way to eliminate the deadlocks? We have ...
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27 views

Mysql replication, master_log_pos sync but tables not update

First, my replication config on Master: replicate-do-db = mydb binlog-do-db = mydb expire_logs_days = 2 max_binlog_size = 100M binlog_format = MIXED log-...
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34 views

Replacing a member of a replica set with the same host name

I am replacing a member of a replica set (the new member has a different IP address). What I am looking to do is as follows: RSYNC the data directory of the existing secondary node to the new node. ...
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34 views

How to alter replicated column

I want to change the length of a replicated column. I ran this: exec sp_articlecolumn @publication = N'DIONLINE-SQL2014' , @article = N'Valuation' , @column = N'WallConstruction' , ...
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37 views

Is there a cheap way to bulk select/insert data between SQL Server instances?

In my office, our employees use applications that are consistently writing transaction-type data to a number of databases on a SQL Server 2012. The traffic consists mainly of inserts and updates but ...
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42 views

Replacement for transactional replication

My colleagues and I have to migrate a database from SQL Server 2008 R2 to SQL Server 2012. Schema, triggers, stored procedures etc. are working fine. But we also have to "migrate" the replication ...
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2 Cluster managers Control same 2 nodes and control OLTP traffic?

can you have two cluster managers controlling the same 2 nodes so that you can achieve real time replication but still direct your oltp traffic to one node and your reports to the other node?
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Why switch? [ReplicationExecutor] another primary seen with election time xxx:1 my election time is yyy:1

On 09-05-16 - 08:41:51 Replica Set elected a new primary. The question why? Here the logs from this time series and without login messages egrep -v 'NETWORK|ACCESS'. On the same OpenStack platform ...
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Download the replication snapshot file using FTPS

I have two databases for two companies. Company A's database contains domain data. The other company is pulling the data using snapshot replication. We have used FTP to communicate: Created FTP ...
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20 views

Meta Destination Owner Differs From Actual Owner

How can the replication meta data table differ from the properties of the publication through the interface; for instance ... SELECT destination_owner FROM distribution..MSarticles Yet, when ...
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53 views

Replication of PostgreSQL cluster from Datacenter to Office with write access

Some information about the cluster: Version: postgres 9.5 Size: /postgres/data$ du -hs . 854G OS: Ubuntu 14.04 LTS Storage: Raid10 SSD's I have a master-slave PostgreSQL 9.5 ...
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mysql replication takes 6 seconds

I am struggling trying to understand why MySQL 5.7.11 semi-sync replication using RBR takes around 6 seconds between 2 VMs on the same physical host. I have verified the network bandwidth b/w the 2 ...
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51 views

Delivering replicated transactions in SQL Server transactional replication

I had seen this message in no. of replication cases but never got to know what is the exact cause behind this message and what troubleshooting to be done to know what is going on. What I want to know ...
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38 views

Merge replication: some subscribers initializing by downloading changes multiple times

I have a database in merge replication with about 25 subscribers, all accessing the publisher/distributor over a satellite connection (high latency, low bandwidth). Recently, as part of a planned ...
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29 views

What is stable history in a database?

I am reading the paper Making geo-replication fast as possible, consistent when necessary by Li et al. in which they propose a geo-replication system called "RedBlue Consistency". They have a table ...
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57 views

How to identify file for “The system cannot find the file specified.” during a pg_ctl -D start?

I'm getting one message during pg_ctl -D start of the standby server. Perhaps more of a general troubleshooting question. This is what I'm seeing when I do a pg_ctl -D start: D:\>pg_ctl -D d:\...
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Postgresql 9.4 replication not working

I have setup my replication as per https://www.digitalocean.com/community/tutorials/how-to-set-up-master-slave-replication-on-postgresql-on-an-ubuntu-12-04-vps. When I start my slave and check for ...
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61 views

“The schema script could not be propagated to the subscriber” error has SQL code instead of file name

This type of error is unfortunately not uncommon. One report of many is this one on Stack Overflow: http://stackoverflow.com/questions/11360331/sql-server-merge-replication-error-the-schema-script-xxx-...
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27 views

MySQL master to slave dump fails when done over SSH pipe

When we need to [re]build a MySQL-5.5 slave, our usual approach is this (CHANGE MASTER TO / START SLAVE omitted for clarity): master$ mysqldump -uroot -p --all-databases --master-data > dump.sql ...
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38 views

Merge Replication query causing slow performance

I have three databases (one publisher, two subscribers) running merge replication and this morning noticed very slow performance. They sync on 10 second intervals but this morning it was taking much ...
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Syncing writes and not deletes - mongoDB

Is it possible to have a secondary instance of mongoDB which syncs all the write operations to the database and not the delete operation? I'm looking for this solution so that I have a backup even if ...
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How to implement sql replication when subsciber cannot acces the publisher

I have 2 servers Server A (Publisher) and Server B (Subscriber) However server A can access Server B but Server B cannot access Server A. There are no VPN between these servers Server A can access ...
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63 views

how to force MySQL unsafe replication warnings to throw an error

I understand that MySQL WARNING statements, with respect to replication unsafe statements, are not 100% valid. That is, if you know what you are doing, if you understand the schema, there are indeed ...
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84 views

MongoDB replicaSet keep 'syncing to' and only can be connect with shell

Hi I am new with MongoDB 2.6 Replica Set I have three DB service in Docker and DB work in Replica Set It works great I can connect to DB Read,Write in C#,MongoVUE but I didn't know why my db will ...
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61 views

PostgreSQL Multi Master Single Slave Replication

I have multiple transaction PostgresQL 9.4 databases and a single publication read-only database. Is there any replication mechanism (asynchronous) to push every updated transaction from every ...
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45 views

SQL Server 2012 AG replication issues

We just went away from SQL Serer clusters in SQL Server 2008 to SQL Server 2012 with AG – have five servers with replicas in a secondary datacenter and syncing over a dedicated eline/LAN layer 2 ...
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Is log shipping good for periodic synchronization?

I have Postgresql 9.3 server on both my laptop and my desktop at home. I keep identical data on both system. Sometimes I work on the database on my laptop while other times I work on the database on ...
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How to sync incomplete replication records in MySQL

if replication breaks and you end up with a couple of records not pushed out to the slave, is there a way to update the slave without stopping locks on the master and manually transferring a new ...
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Classic vs. GTID replication MySQL 5.6 - how to identity which one used from errors?

Is that true? In classic replication (SQL_SLAVE_SKIP_COUNTER=1) you never see UUIDs in logs and show slave status like 3e11fa47-71ca-11e1-9e33-c80aa9429562:1-5? When you see an UUID, there is GTID ...
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Replicating data from SQL Server 2014 to SQL Server 2005 - temporary solution

I will be installing a new SQL Server 2014 database system, which is based on our current SQL Server 2005 database system. The new system will be on a completely new infrastructure when we go live, ...
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52 views

After disabling replication, should I disable binary logging?

I have a master-slave setup currently but am going to remove the replication DB server. The DBs are running on MySQL 5.6. I have a couple of questions about removing the replication: 1) I have read ...
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69 views

Query slow on subscriber but fast on publisher (Merge Replication)

As the title suggests, I am having issues with performance with my subscriber. I run the exact same query (it's a recursive query with a few joins but nothing too serious). I can run this query on my ...
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22 views

Replication of Database in PostgreSQL

I want to Replicate my PostgreSQL, in the website there far too many options, I want to know which one to choose. I have a main server which the database is stored at. Inserting, editing and deleting ...
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Snapshot replication error two days in a row

We have a mature replication system to move data from OLTP to BI. It's been working for years with relatively few troubles. This week we've run into the same problem two days in a row with snapshot ...
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78 views

Redis master and slave use different memory

I deployed a redis replica set which consist of one master and one slave. From top command output, I figure out each memory usage. master: 8176352Byte * 8.5% = 678MB slave: 2050116Byte * 75.6% = ...
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54 views

SQL Server 2012 Merge replication not replicating all changes

Having a problem with replicating a database between two servers, both running SQL Server 2012. We have a table where each site that stores the database updates a record every minute with the current ...
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78 views

Is it possible to synchronize multiple databases in to 1 database with the same tables?

We are facing a situation where we have 5 different businesses with comparable data and are building 1 single application to deliver their data to common customers. In order to do this, the plan is ...
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Restoring MySQL Master-Master Replication

I am trying to restore Master-Master MySQL 5.6 servers. The replication failed between DB1=>DB2 and so DB2 went out of sync. GTIDs are enabled. I have done an export and import from DB1 to DB2 and ...
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44 views

How to manage old replication issue

Background We are using SQL Server 2008 and we had a merge replication configured (before i joined the company). After that they stopped using it and the didn't delete it and configured transactional ...
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38 views

Effect of upgrading windows server 2012 data center

I have a production windows server 2012 data center server where IIS and SQL server was installed and replication was configured in SQL Server. It is infected with a malware. After cleaning it with an ...
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Merge Replication: Error “The insert failed. It conflicted with an identity range check constraint”

For one of our SQL server 2005 enterprise, configured with merge replication, we suddenly start seeing the below error message: The insert failed. It conflicted with an identity range check ...
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125 views

SQL Server using Linked Server to Oracle - table definition not updating with refresh

Is there some trick for SQL Server Linked Server to update the ODBC connection to a changed table? SQL Server provides Oracle with a view. Oracle runs a materialized query to basically make a table ...
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Records not getting replicate from Mysql 5.5.32 to MySQL 5.6

I have a MySQL 5.5.32 server (community edition) on one Linux server which is master. I have a MySQL 5.6 server (community edition) on another Linux server which is slave. I have installed various ...