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 5.1.66 SSL connection error ERROR 2026 (HY000)

UPDATE2 Using WireShark I found out the problem string (I hope I did): 28 | 9.582638 | 192.168.18.128 | 192.168.18.129 | MySQL Response Error 1043 And the error is (according to docs): Error: ...
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152 views

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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41 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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102 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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145 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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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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296 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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245 views

How unsafe is it to change the data source of repl_distributor on a publisher

I have a long story that I will condense to a few bullet points that leads up to my question Reporting Server (SQL 2008) is distributor/subscriber cluster for a SQL 2000 Transactional Publication ...
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80 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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351 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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36 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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42 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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63 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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81 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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338 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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60 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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220 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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338 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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2k views

Oracle GoldenGate replication is stuck

I deployed Oracle GoldenGate to integrate many-to-one databases. After initial loading everything works fine. Until recently, some of the replicat seem to stuck and do not proceed to change ...
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Understanding pg-pool in details

I have following problem regarding the pg-pool (3.3.3) When master fails, automatic failover happens and standby is promoted to master. But this new master don't have any replicators. Other slave ...
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48 views

Replication of a remote MySQL database to local MySQL database

I'm the developer of my employers corporate private website, a HTML5/PHP/CSS powered site for company reports etc. The site, hosted on a shared hosting package, connects to a remote read-only MySQL DB ...
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50 views

sqlcmd returning NUL instead of NULL for tinyint column

sqlcmd -E -d MyDatabase -Q "sp_helpsubscription" -s "," -o file.csv -W -u Column 23 which is suppose to be a tinyint (subscriber_type) is output as NUL instead of NULL when the value is NULL. I ...
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51 views

mongodb replicaset

I am adding a new member in ReplicaSet and it starts initial sync bur after certain point sync break and start resync again.this process continue and never complete its initial sync.so please resolve ...
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68 views

Error to connect mongos when trying to create replicated sharded cluster

I'm trying to create an replicated sharded cluster in mongodb. Initially I've created two shards and there are a replica set with three members in each shard. And all the shards and replicasets run in ...
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29 views

Sync/Replication of 2 Oracle Databases with NetApp storage

I am working on a high availability setup of Oracle Enterprise Manager. I need the back-end repository replicated (preferably in real time, or something close) to another repository, in which I could ...
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69 views

“Replicate” Table structures with sp_addscriptexec

In our customers environment is a massive central server (running SQL Server Enterprise 2008R2) and some distributed PCs (running SQL Server Standard 2008R2). The central server has a replication for ...
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47 views

MySQL replication of single DB to same server

I have a DB Server running CentOS 6.4 and MySQL 5.5 from RPMs (not source). I have dozens of databases but one of them is being hit quite hard with large selects which locks out other updates which ...
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22 views

replication error involving ignore-db

I have simple master/slave replication set up between two servers. The master has several DB's I wish not to replicate at this time, in fact there is only DB I am trying to replicate. I have several ...
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21 views

Sybase Replication rs_subcmp can ignore length?

I want to use rs_subcmp utility to sync one table. I've created a config file but I got the following error: Length mismatch for column #9 between the primary (50) and the replicate (100). ...
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47 views

PostgreSQL 9.3 slaves don't recognize hstore as a type

I am using the postgres built in replication with two slave nodes and a single master. On the master node (as well as the slaves) the hstore extension is installed. But whenever a query using hstore ...
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71 views

Data Corruption on base backups created with wal-e?

I have streaming replication setup on Postgresql 9.1 with two machines on AWS EC2. The master has a cron job that does a daily base backup using the wal-e tool and uploading it to Amazon's S3 storage. ...
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13 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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91 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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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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61 views

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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171 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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69 views

Data replication vs parallel shard query

I'm not a DBA, and I'm wondering how a SQL Server database can scale to fit the needs of a social network. I'm not interested in NOSQL, and I understand that caching plays an important role in ...
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56 views

Replication topology advice - central subscriber

I'm seeking guidance and advice about how to set up replication in MSSQL to deal with the following criteria. We have a central server hosted at a data center - this is where our web app is located. ...
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42 views

Mysql Replication Master/Slave and Master/Master

Looking for some insight and opinions from some DBAs, as I've been tasked to look into using Master/Master replication for a single table in a database. We currently run mysql replication using a ...
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29 views

Data mirroring suggestions

On my test environment, I have a SQL 2012 2-node physical cluster that accesses a common iSCSI storage on a separate Windows Server 2012 box. What options are there if I want to backup this storage to ...
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mysql 5.6 GTID replication 'Got fatal error 1236 from master when reading data from binary log'

I Checked SHOW SLAVE STATUS error is "'Got fatal error 1236 from master when reading data from binary log: ''The slave is connecting using CHANGE MASTER TO MASTER_AUTO_POSITION = 1, but the master ...
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SQL Replication - Data not showing

Good Morning, I have recently setup SQL replication and changed some data in one of the tables on the primary table. This data however has not been replicated to the subscription server. On the ...
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63 views

MySQL SSL Master-Slave replication not syncing

I have originally posted this thread on stackoverflow and after a comment I moved it here. The original post can be found here. I have setup a typical Master-Slave replication scheme for my MySQL ...
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156 views

Log file growth due to replication issue

I have one primary database and it's getting replicated to another server. Both servers are SQL Server 2008 R2 with SP1. Replication was running fine till last week. We have transaction log backup ...
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130 views

How to upgrade MySQL 5.0 to 5.5 with master-master replication?

I have to update 2 hosts with SUSE Linux Enterprise 11 from SP2 to SP3 which implies an update from MySQL 5.0.94 to 5.5.31. The release notes state: SLE 11 SP3 introduces the upgrade of the MySQL ...
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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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90 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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91 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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307 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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71 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 ...