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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Looking for suggestions to Migrate Amazon RDS Large Instance to non-amazon host - Live

We have an Amazon RDS Large instance with a database of about 20GB that needs to be migrated without having to take our website down or minimize downtime to less than a couple of hours. And I am ...
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137 views

MySQL 1366 Error on Replication Slave

I've got two pairs of servers (each identical hardware and OS) with replication running on both pairs. Running MySQL 5.5.34 on Windows Server 2008 R2. I'm trying to track down a problem that has ...
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218 views

Mysterious merge replication problems creating a subscription

We have a merge publication which had been mostly working OK for a long time (years). Recently an article was added, we were informed the snapshot was out of date, so we regenerated it. Then we got ...
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215 views

Scheduling duplication of two tables across instances

In my SQL Server 2012 database I have two tables: [tbl_Customers] - about 30 rows [tbl_Users] - about 10,000 rows I need to schedule the two tables above to be copied to a new instance, say every ...
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384 views

Excessive replication snapshot size causing failure

I am searching for an explanation of a replication snapshot being in excess of 5 times what we're predicting Following a replication failure we are attempting to reinitialise subscriptions with a new ...
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110 views

Select @@identity in Merge Replication

I'm going to implement database replication (merge publication, bi-direction) between two servers running SQL Server 2008 Standard edition. The setup is alright but it comes to a problem when ...
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35 views

Central publisher with two subscribers merge replication

Scenario: I am (not very professional) a DB admin of a company located in CityA with two branches in CityB and CityC. Their working hours are from 8 AM to 5 PM. The boss is working in CityA and wants ...
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132 views

Adding a replication article manually & failing to generate new replication sprocs

I've got a large number of articles I need to add to a new replication transactional publication in a dynamic fashion, but appear to be running into an error every time I switch replication on. ...
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2k views

Which Postgresql Replication Solution to Use? (Asynchronous Multimaster / Bucardo?)

First, I'm not a DBA, so pardon me if any of this question seems "off." I've written a peer-to-peer multiplayer game (the client) which connects to one of multiple servers for match making. ...
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29 views

sp_spaceused and replication question

I have been replicating data from a table to 2 different locations and was just looking at sp_spaceused to see the size of the tables. I have noticed that the replicated tables are smaller than the ...
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198 views

Create a high availability cluster configuration PostgreSQL for Windows

I want a server to be replicated, here is the scenario: When my primary server goes down or fail I want the secondary or the standby server to take over, I'm using Windows 7 for the primary server, ...
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88 views

Row not being deleted from the publication when it's deleted in a subscription

We've merge replication configured in our environment(1 Publisher, 3 Subscribers) and We know by default merge replication is bi-directional. Its working fine in case of inserts i.e, if a row is ...
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SQL Server 2000 Replication

I have a challenge with replication on SQL Server 2000. The replication has full permissions, but still I get this below error. The SQL Server 2000 is installed on the C: Drive, but the database is on ...
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SQL Server Merge Replication Stuck, lots of conflicts and genstatus = 4 (interrupted) [closed]

Merge replication is the gift that keeps on giving as far as throwing new things at us, and the latest is a subscription that had been behaving for quite sometime suddenly slowing to a crawl. This ...
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89 views

MySQL Replication fails - commands received in wrong order?

The other day, I had this issue with one of our MySQL 5.1.60 master and 5.1.61 slave setups: Last_Error: Error 'Can't create table 'foobar.#sql-4b87_2' (errno: 150)' on query. Default database: ...
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93 views

Replicating from master to slaves and from slaves to master

I have a master and multiple slave machines. All SQL operations on the master node should be sent to the slave nodes. But the tables on the slave nodes may also be written to locally. These local ...
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152 views

Get missed transactions from slave

I'm trying to write a disaster recovery plan, I have one way replication with 1 master(A) and 3 slaves(B,C,D) A /|\ / | \ B C D Let's say my master crash, and I loose all data on ...
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253 views

mysql replication for certain dababases

I am new to mysql and I have a query in regards to mysql replication. Currently, I have a master database that replicates to four slave servers at the moment. I would need to set up a few ...
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232 views

Replication is missing a specific set of rows on subscriber

So I've got two servers, we'll call them Server A and Server B. Server A has a table, Table 1, which gets replicated to Server B. Server B has a table, Table 2, which gets replicated to Server A. ...
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809 views

What are the ports and directionality of the TCP connections used in MySQL replication?

I wanted to know how replication works in mysql. Both slave and master have mysql server running say on port 3306. Slave acts like a client and master acts like a server. Does slave always bind to ...
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81 views

Can scheduled and continous replication configurations exist side-by-side on the same master/slave servers?

Environment We have a core sql server cluster. This cluster contains some databases that get replicated to a load-balanced sql cluster of currently 3 servers. These databases are replicated each 12 ...
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264 views

Improve performance of transactional replication

I 'm testing implementing transactional replication . The replication works fine if I insert/update handful of rows. The problem occurs when I have a sql job running which deletes/updates & ...
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89 views

After subscribing to a replication set, why can't I see the replicated tables on the local database?

I'm pretty new to databases in general (about two weeks), but I'm learning fast. If I'm using the wrong terminology anywhere, let me know in the comments. Bear with me. :) Background The company I ...
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Distributed Database Architecture Using MySQL Replication

I've been task to move our web servers to the cloud for all countries that use our services for localization. The issue is, they must share the same data and therefore I need to set up some database ...
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104 views

Merge replication issue : conflicts with new data

I set up merge replication with SQL Server 2008, I am having issues when creating new data on clients and trying to synchronize with the remote server. Pulling data from the server works fine. But ...
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426 views

Taking a backup of a streaming WAL slave

I have an environment with pair of postgresql servers set up to do WAL streaming replication. I also have a test environment and periodically I want to snapshot the production DBMS and restore that ...
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272 views

Transactional Replication Failing Suddenly - Distributor Error

I have two databases (both SQL Server 2008 R2) taking part in transactional replication. This exists to pass data to a customer of ours, so I am troubleshooting from the Publisher side. Replication ...
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350 views

SymmetricDS fails to start for PostgreSQL 9.2

I'm trying to get SymmetricDS up and running with PostgreSQL. I've followed the tutorial (almost) exactly. (I have not set up a separate node yet since, for my purposes, I need that separate node to ...
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175 views

PostgreSQL postmaster will not start after configuring for SymmetricDS

I'm trying to configure SymmetricDS for use with PostgreSQL, a database platform widely supported by the former. When running through the quick-start tutorial (which leads you to some pre-setup ...
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70 views

MySQL Master-Master Replication Table Row COUNT() Inconsistency

I have two MySQL servers replicating to each other in a Master-Master typology. This has been working fine for several months now. Recently I've noticed some drift in one Master. There is a row ...
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57 views

Is using “read-committed” isolation level save on *slave*?

I saw a few articles which discuss how different transaction isolation levels affect replication. If I understand properly, all these related to transaction isolation settings on master, not on slave. ...
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488 views

Replication fails because of a non-existent foreign key

I have been trying to get a previously working replication to start working. I have tried many settings, but I can't seem to make it work. Here is the scenario. I dropped all the FK constraints ...
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405 views

Setting up binary replication between two PostgreSQL instances

I have two virtual machines: dbrepa (-.175) and dbrepb (-.191). Both have PostgreSQL 9.2 installed; once PG was installed (never initialized) on dbrepa, dbrepb was made as a clone. I need to have the ...
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96 views

MYSQL replication not working with connector but works VIA phpmyadmin

I have setup a MYSQL replication, and have tested the replication by using phpmyadmin. On all occasions when using phpmyadmin, the data was being replicated successfully. But when records are ...
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254 views

SQL Server DR, mirroring or virtualise and mirror

I have a client with a small business server 2008 Premium installation. This obviously includes SQL Server 2008 standard on a separate 2008 server. On the SQL we run several line of business ...
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418 views

SELECT + INSERT + Query Cache = MySQL lock up

MySQL server seems to constantly lock up and stop responding on certain types of queries and eventually (after couple of minutes of not responding) give up with an error "MySQL server has gone away", ...
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306 views

Merge Replication Update Statement Timeout

I work for a company that provides web based data collection. Currently we have a SQL Server 2012 server as the publisher for 2 subscribers (planning on expanding up to 5+ subscribers), both SQL 2012 ...
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212 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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194 views

MySQL slave doesn't reconnect to master after master is rebooted

I've got a new MySQL replication setup with one master and one slave. In all of the following scenarios, the slave automatically reconnects to the master and resumes replication where it left off: ...
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145 views

Is the Service Broker good for publishing data between servers?

I'm trying to find a better solution when publishing data to a remote table. So we have Server A and Server B. Server A holds a master table which should be replicated to Server B. Currently, we ...
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1k views

Creating mongo 3 node replica set on ec2 problems

I'm trying to create a 3 node cluster of mongo replicas on ec2 instances, with internal ips 10.168.xxx.xxx, 10.166.xxx.xxx and 10.188.xxx.xxx, my config file is: dbpath = /home/ubuntu/mongo-data/ ...
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891 views

Replication error

We have a slave server that has stopped replication due to the following error: Slave SQL: Query caused different errors on master and slave. What could be the cause of this error? And what would ...
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67 views

Setting up replication alerts

I 'm trying to configure alerts for replication. Currently on my test setup I run everything under user 'sa'. When I try to set up alert for agent failure I get the following error Login failed for ...
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103 views

changing server roles in streaming replication

I want to implement streaming replication using postgresql-9.2.4 in my reporting application. I came stuck on the below scenario. create master and slave with synchronous replication which is ...
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160 views

MySQL SSL encryption

Does setting MASTER_SSL to 1 in change master ensure encryption without specifying options MASTER_SSL_CA, MASTER_SSL_CAPATH, MASTER_SSL_CERT, MASTER_SSL_KEY ? After setting MASTER_SSL to 1, show ...
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90 views

MySQL Replication not proceeding

I have a weird replication problem I have not seen before. It's basic mysql replication with single master and two slaves. One of the slaves is not executing replication events and seems just stuck ...
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87 views

Replication Master/Master, both master stop by themself

I did a master/master replication with MySQL on a Gentoo OVH Release 2, all work fine in my test phase, i put it in production, the replication works fine in 1 or 2 days but this morning, i don't know ...
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189 views

Do I need to perform any tasks after Postgres goes into recovery mode?

For starters, I do not have any sort of automated failover in place. After two scenarios, I'm unsure of the state of the database and any required actions, if any, to take: My master server ...
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97 views

Mysterious missing transactional replication tokens

I am looking at implementing Transactional Replication subscriptions in an AlwaysOn AvailabilityGroup. I tried to use this as a guide: ...
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243 views

Replication Not Replicating

I'm trying to set up transactional replication between two SQL Server 2008 R2 databases and, no matter what I try, it just doesn't seem to work, and I'm not sure where to look for further information ...