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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MySQL Replication with Tungsten

I am trying to setup a multi-master type of replication with each master having an additional slave using tungsten. As an example, lets say I have 4 hosts (A,B,C,D) and Hosts A and C are the Masters, ...
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68 views

What synchronizes two delayed replicas, which is part of the replica set, included in sharded cluster?

Please take a look at my mongodb map at http://postimg.org/image/krzvmep4d/ What synchronizes two delayed replicas, which is part of the replica set, included in sharded cluster? How can I use my ...
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148 views

MySQL 5.1 replication broken after crash, duplicate key error, why? No redo log corruption

What do you think is the reason for the duplicated key errors in our MySQL 5.1.61 replication slave, after the slave machine crashed? It's not corrupted redo logs. Details follows: We have ...
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41 views

Is it possible to have mysql treat row based updates as “upserts”?

When processing row based replication events, mysql replication will break if it's unable to find a row matching the "before image". Is there any setting to tell mysql, if you don't find that row, ...
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23 views

How to Replicate data from read only sql database to Active one

We are applying logs in every 30 min to one SQL db which has to be in Restoration Mode/Read only mode as we are applying logs continuously. Now we have to Set up Replicaion of this Read only Db to ...
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35 views

How to resynchronize replication for a single database

I have two MySQL 5.5 servers in a master/slave replication setup. The server hosts about 10,000 databases, but the replication is messed up for only a couple of databases. To fix the replication I ...
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3answers
101 views

Changing MySQL auto_increment_offset

Sorry for the wall of text, but I don't know what's relevant and what's not. I have MySQL a MySQL database that it is being replicated from our production environment to our development/test ...
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35 views

Mysql: Add a slave to an already existing Master-Master setup

We already have a Master-Master MySQL setup running live in the network. Now we are asked to add a slave to the setup. Is it feasible. If yes, what's the steps I need to follow. Also what are the ...
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1answer
67 views

Mysql Master-Master with additional slaves

We have two datacenters with a copy of our web app (online training platform) at each. The primary datacenter receives all of the traffic at any given time and the second datacenter serves as a ...
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85 views

Master and slave tables with different character sets - will replication break?

We have some huge tables in our MySQL 5.6 database that have latin-1 as their character set, and want to convert them all to UTF-8 (along with converting the database's global character set). The ...
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55 views

MYSQL 5.5 SERVER MULTI MASTER REPLICATION

Myself using mysql 5.5 in master side and in slave side(remote connection) It seems the configuration like log_bin,binlog_do_db are correct but it shows Slave_Io_Running : Connecting ...
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2answers
167 views

2012 Transactional replication not delivering new articles

I have added a new article to an existing push publication with the following code sp_addarticle @publication='statics', article='FlightBaggageMarkup_tbl',source_object='FlightBaggageMarkup_tbl' ...
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1answer
8k views

MySQL: InnoDB keeps crashing - how to recover?

# free -m total used free shared buffers cached Mem: 48289 35288 13000 0 347 30399 -/+ buffers/cache: 4541 43747 ...
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256 views

Replicating some tables from one postgres database to another

I've got the following situation: I have three machines running postgresql databases. One machine holds client account information (call this machine C), the other two machines hold client logging ...
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1answer
64 views

Is it possible to archive table rows of an RDS read replica?

I would just like to know if I can purge 60 days old rows from a replica. Would the replica just copy the rows again from the master after deleting the rows? Because what I would really like to do is ...
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1answer
92 views

Native checksum table says there's a difference, pt-table-checksum does not

I was setting up a slave and doing some table checksums to check things were ok before getting them live. I did a native mysql checksum tables on the slaves after syncing slaving to a stopped point ...
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1answer
63 views

fixing mySQL replication (large DB)

I have a large mySQL database and I am replicating to two slaves. All three servers are windows (i know). One of my slaves seems to have corruption, the other is fine. This is huge DB, a few ...
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1answer
31 views

Merge replication parameterised filters

We are looking at using merge replication to maintain a 2-way data flow between a central SQL Server 2012 Standard database and, eventually, 100's of international satellite SQL Express 2012 ...
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118 views

How can streaming replication be kept lagged by a certain 'delay' time?

Postgres has had streaming replication since 9.0 and since 9.1 it is possible to pause and resume the application of the streamed WAL records using pg_xlog_replay_pause() and pg_xlog_replay_resume(). ...
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53 views

SQL Server 2008 replication and large data updates

We have an environment setup where we're replicating a single SQL database to 14 subscribers across relatively slow WAN links. The data at the distributor is refreshed once a day - where the tables ...
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3answers
1k views

Replicating only significant records to specific database

I have a remote database which holds data for various databases in various locations. I want to do database replication, but only data specific to a certain database should be replicated to it. I can ...
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1answer
1k views

How to configure replication from PostgreSQL (RDS) to vanilla PostgreSQL?

I have an Amazon RDS Postgres DB and I created a "replicator" user and granted it the "replication" privilege. db=> create role replicator login password 'something'; CREATE ROLE db=> alter ...
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133 views

Multi-master + slaves replication in MySQL

I've been playing around with MySQL and tried to create replication topology according to the following picture. Slaves are used as read servers and Masters are used as both read and write servers. ...
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12 views

DB2 bidirectional replication of federated object?

Bidirectional replication of a federated object - is this possible on DB2? Example: replication of a table on the DB2 and another table on MySQL as federated object inside of DB2. Anyone ...
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47 views

DB2 manual asynchrounous real-time replication to NON-DB2 database

I have been given a Proof-of-Concept task to find out whether it is possible to set up manual (=no 3rd party tools allowed) asynchrounous real-time replication in DB2 that replicates all data changes ...
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32 views

MySQL manual asynchrounous real-time replication to NON-MySQL database

I have been given a Proof-of-Concept task to find out whether it is possible to set up manual (No 3rd party tools allowed) asynchronous real-time replication in MySQL that replicates all data changes ...
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100 views

Heartbeat Options with MySQL and Possibilities

I would like to understand if the following scenarios are possible in Heartbeat in Linux. Setup: Two Database Servers running Mysql in Active/Passive mode in replication mode having Heartbeat setup ...
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1answer
96 views

Is it possible to replicate wide table in MS SQL?

The reason of me using sparse columns is to overcome limit of 1024 columns in a table (I know that generally it's not a good reason and there are downsides, but in my situation it's good option ...
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364 views

How do I (safely) kill long running operations in MongoDB?

Occasionally operations get out of control in MongoDB and might end up running for hundreds of seconds, and impact performance until they are killed or completed. When that happens, I know I have ...
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2answers
303 views

Streaming Replication Log is puzzling me

I have a streaming replication hot-standby setup, which seems to be running all good. I can login, execute selects and the result seems to be up-to-date with the master. However in the log of the ...
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1answer
223 views

With SQL transactional replication, does changing user permissions to a table trigger a new snapshot?

I was hoping to get some help with a SQL Server 2012 transactional replication scenario - or maybe just my understanding of where permissions are stored in SQL server. If I change a users permissions ...
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65 views

Error in configuration sql server replication

I am configuring replication for a sql server 2005 on win server 2003. I get this error: TITLE: New Publication Wizard SQL Server could not configure 'aaaa' as a Distributor. ...
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1answer
78 views

MySQL Replication

i try to search around the internet to find out what's a "Master -> Slave" Replication of MySQL want to do? Can sombardey maby explain it for me? what i can read is what happen are when i have a ...
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2answers
61 views

Replication between SQL Server 2005 - 2005

I'm hoping to get some help with a SQL Server 2005 replication issue. In short, in replication monitor, (On the Publisher), on the 'Distributor to Subscriber History' tab, I see two lines under ...
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25 views

The @article parameter value must be 'all' for immediate_sync publications

I have a publication of 4 tables and many subscribers (transactional push replication), most of them being interested by one of those 4 tables. Everything is working fine as long as I create the ...
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147 views

Mysql replication broke after mysql upgrade on master

I've seen this question, but I am not sure if the solution is right for my particular error (replication breaks after upgrading master) I upgrade my master server's mysql from 5.5.34 to 5.5.35. After ...
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1answer
269 views

Streaming replication between postgresql 9.2 and 9.3

Does anyone know if it's problematic to have a postgresql 9.3 slave setup to do streaming replication from a postgresql 9.2 master?
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414 views

Initializing Transactional Replication From Backup

There is an option when setting up a publication for replication to Allow Initialization From Backup. We have been creating replicated databases for several years now and have always initialized from ...
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1answer
49 views

Master-master database replication on 5 servers

My current project requires immediate replication between 5 databases. Servers are physically distributed across the globe. Currently we use Redis with one master server installed on another 6th ...
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34 views

Probable database replication issue in LAMP setup with Master/Master MySQL replication

I have been facing issues in my high availability failover (on WAN links) LAMP setup hosting a Drupal CMS based site, approximately after every 2 months both servers suddenly stop responding to http ...
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58 views

SQL Server 2012 Replication Initialisation Fails — Table keeps being dropped

I have two servers - one located in Australia (Distributor / Publisher), and a second in the UK (Subscriber) both on Amazon's cloud. I have attempted to configure replication as both pull and push ...
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70 views

MySQL Master/Slave replication on same VM instance?

I'm fairly new to databases so I hope this isn't a silly question! Is it possible to set up master/slave replication on the SAME server? I understand there are not any advantages to this in terms of ...
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231 views

Redis Master/Master or Shared Storage

I'm setting up Active/Passive Redis setup for a client of mine. I have a high performance NFS storage where I'm storing the configs and the data currently. I'm just wondering if it would be best to ...
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211 views

Cannot stop MySQL 5.5 replication threads

We have a master-master replication setup using MySQL 5.5. On one of the servers I am trying to stop the slave thread, but without success. To ensure that the replication does not connect to a real ...
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27 views

On replicating all tables of a given database except for those starting with some pattern

I'd like a slave to replicate all tables of a given database except for those starting with some pattern, eg. those with names starting with 'nc' (non-critical, redundant denormalized tables). So I ...
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52 views

Upgrade 2 servers with master-master replication without data loss

We have two MySQL servers running with master-master replication in a Pacemaker cluster. If a database operation should be done, the primary server is asked first to do the job, if it fails, the ...
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166 views

Postgres database zero down time production deployment

I need some idea about how I can deploy a financial application in production environment using PostgreSQL DB with zero down time. I have two servers in Master-Slave design. Currently I am giving ...
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2answers
97 views

MySQL replication: slave not updated

This has been asked many times over but we really cannot get a simple Master-Slave Mysql (5.5.25) replication to work for our two dbs (FatTree and Torus). And no trace of error in the logs. The ...
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SQL Server replication - recommendations for stability

We have two SQL Server 2008R2 Standard servers, and we've set up replication of a single database between them. The replication is about as simple as it can get - it's a transactional replication from ...
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103 views

Backup from Server1 and restore it to Server2?

IF we have two Servers installed with SQL Server 2008 instances, Server1 has three drives C, D and E with 100, 500 and 500 GB respectively and Server2 has three drives C, D and E with 100, 300 and ...