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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Requirements for IIS server used for web sync, merge replicaiton

Short question: Can anyone tell me what the requirements (especially when it comes to SQL components) are for the web server used as web sync for merge replication? Background: I have a solution ...
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913 views

Merge Replication from SQL 2008 R2 to SQL 2005 Express: SQL Server version (10.50) is not supported

I'm setting up a (one way) pull, RMO merge replication via web sync from my main database (SQL Server 2008 R2) and clients running SQL Server 2005 Express or 2008 Express (I must support both). I've ...
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What's the best way to ensure referential integrity on a replicated database?

Using SQL SERVER 2005, I have a couple of questions on Replication and referential integrity. 1) Does Replication handle referential integrity? 2) If I do an Insert to Parent table and then to ...
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MySQL replication to slave having VPN connection to Master

I am setting up an environment in which the Master and Slave are on different networks at different physical locations (both run on MySQL 5.5.20). I have set up a VPN connection from slave's network ...
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How to setup replication(Master/slave) in MySQL 5.5.20?

I have two servers both running on MySQL 5.5.20 and I want to setup replication, so every update/insert on Master would reflect immediately on Slave machine. I tried following this tutorial (I used ...
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MySQL replication: “Houston, We've Got a Problem”

I ran into a problem with our replication server. Essentially, we have 2 databases (database1 and database2). Master server has both. Slave has only database1. There is a Replicate_Do_DB: database1 ...
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SQL Server Replication causing locks on table

we have three MSSQL 2005 servers (database is set to compatibility level 80 for legacy reasons) which we have just set up Transactional Replication w/ Updateable Subscriptions on. Two which are ...
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Why isn't mixed-mode replication default on MySQL

It is well known that mixed-mode replication was default from MySQL 5.1.12 to MySQL 5.1.28. However, this was reverted, and at the current moment, statement-based replication is default. In the ...
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Replication problems after server upgrade

In transactional replication - first 8000 rows of snapshot copies to subscriber snapshot then acts like it completed successfully. Publication table has 21 million rows. Snapshot says completed ...
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SQL Server 2008r2 replication from multiple sources

I am currently rearchitecting an application so that each of seven businesses will have there own "live" SQL Server 2008 database and at scheduled times during the data the data from all seven ...
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590 views

Programatically testing slave status - What fields in SHOW SLAVE STATUS indicated slave status is OK / in ERROR?

We use pingdom and a few internal heartbeat mechanisms on our product. We would like to add a 'are our slaves running and in good shape' check. What fields in SHOW SLAVE STATUS indicate that the ...
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will replication from 5.5.20 to 5.0.XX server work?

I gave two machines which run on two entire different versions of MySQL server. I want to do the replication from 5.5.20 to 5.0 server. Will that be possible? Because I remember when I transferred ...
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Fixing tables out of sync as reported by pt-table-checksum, pt-table-sync is not working

I have several tables being reported by pt-table-checksum with CRC_DIFF between my master and slave servers using the following commands: $ pt-table-checksum h=master,u=user,p=password ...
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Converting 3 Master + 1 Slave to 4 Master - Any advice?

so we have a beautiful 3 master 1 slave cluster running. we would like to convert this to a 4 master cluster. here is how the topology currently looks s1 enslaved by s3 s2 enslaved by s1 s3 ...
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MySql Switching Masters During Failover with log-slave-updates

I am still pretty newbie to mysql. This question is regarding promoting slave with option --log-slave-updates to become a master. The typical schema of promoting slave to master was described in ...
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Merge Replication Invalid Object ( on an object that no longer exists ) ComErrorException

My merge replication scheme has suddenly started failing. When trying to sync it complains that there is an invalid object. 'dbo.myfunction'. The function used to exist but was removed. There was ...
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Changing MASTER_CONNECT_RETRY - Anything pit falls to keep in mind?

We run your basic Master + Multi-slave mysql replication setup. We would like to lower the MASTER_CONNECT_RETRY parameter on each of our slaves. Is there anything beyond re-executing CHANGE MASTER ...
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pt-table-checksum with slaves using non-standard ports

Trying to run pt-table-checksum to detect slave drift in MySQL replication. My slaves are not using the standard TCP listening port however, and so when I run the tool I get an error: Cannot connect ...
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How do i set up an Alert that tells me when a replication of data failed?

I've got Database Mail setup and tested fine. Alerts do work when I stop and start the replication agent job, but I cannot get it to throw any alerts when data moves from a publisher db to a ...
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Mysql master-master replication auto flush old logs

I have mysql-5.1.41 master-master setup running on ubuntu machines and below is the configuration of a master: skip-host-cache skip-name-resolve event_scheduler = ON max_connections = 500 ...
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MySQL Replication - Introduce new Slave to replication

I've recently taken on a sys admin position managing a group of 20 (or so) servers. One thing I haven't dealt with before (apart from in a test situation), is introducing a new slave to the MySQL ...
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Is there a generic framework/design pattern/library for real time replication of MySQL database onto other servers?

Summary I need to backup in real time updates/inserts to a MySQL database. Cron/batch jobs appear to be unsuitable for this particular requirement due to the time interval meaning that the data would ...
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Mysql master-master permission replication issue

I came to know it's safe to replicate mysql database to have the users and permissions replicated, from a post in ServerFault is-it-ok-to-replicate-mysql-db. I have setup master-master replication ...
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MySql replication with Raw Data and InnoDB tables

I want to start replication on DB that has many InnoDB tables and MyISAM tables. I did everything according to manual Creating a Data Snapshot Using Raw Data Files. Firstly, I tried copied all ...
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How can I edit a replication subscription to include new articles?

I have some replication subscriptions and I need to add some tables to one of the subscriptions. Is this possible? Publisher/Distributor: Sql 2000 Subscriber: Sql 2008 Thank you. edit: I found this ...
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Backup VLDB replicated database in SQL Server?

I have a problem with my backup strategy. Currently I'm doing a Full Backup every night and transaction log backup every 2 hours to TAPE. This used to work without problems, but the size of the DB ...
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Does PostgreSQL 9.1 Streaming Replication catch up after a lag without WAL archiving?

Context: Let's say that, while using Streaming Replication/Hot Standby on a Postgres 9.1 cluster, a standby node goes down. It stays down for an day, during which time a lot of DML occurs on the ...
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MySql shell command not replicated to slave - “LOAD DATA INFILE” [duplicate]

I have a shell script that looks something like that: #!/bin/bash mysql -udb_user -pdb_password -e "LOAD DATA LOCAL INFILE '/srv/some_file.csv' INTO TABLE db_name.db_table FIELDS TERMINATED BY ...
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Sql Server Agent REPL Jobs

I know that replication uses Sql Agent jobs to pull subscriptions. Are these jobs supposed to stay in an 'executing' state? (Sql 2008 SP1)
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Has anyone ran into this replication breaking bug before?

I've been having this issue where replication was breaking on colliding primary keys. The annoying thing was these were auto increment generated. I think my issues been tracked down to ...
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MySQL Replication Error

I am getting an Error on Slave as: could not execute Write_rows event on table mydatabasename.atable; Duplicate entry '174465' for key 'PRIMARY', Error_code: 1062; handler error ...
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what are the conditions under which mysql replication might break?

I am running mysql server in master/slave configuration mode. There are multiple slaves replicating from a master. They are working fine and their replication status is monitored. One of the slaves ...
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657 views

MySQL Replication: Slave with Different Column From Master

I have a Master/Slave replication. I had to change the name of one of my columns in one of my tables from temp_col to sent_at, this column is not being used yet. I've issued an alter table on an ...
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MySQL Replication monitoring [closed]

Im looking for a tool that could help me and my team monitor our MySQL Replication. I would love for a tool that could alert me if Seconds_Behind_Master passes a threshold Slave_SQL_running is ...
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466 views

Replication chaining with PostgreSQL

We have an unusual replication scenario and I am not sure which tool would be appropriate for that. Basically, we have a legacy non-normalized database that we want to refactor into a normalized ...
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What does the base64 BINLOG statements in mysqlbinlog output mean?

I have looked over the mysqlbinlog command as a candidate for rollback method from MySQL 5.5 to MySQL 5.0. When I ran the command on one of the bin-log files in the MySQL 5.5 server, I've noticed ...
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What's the purpose of /*!*/; in mysql binlogs?

The title pretty much sums up the extent of my question. They seem to appear after every statement. Sometimes on a new line following. At other times, at the end before the ;. What's the point?
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Best way to setup master to multi master replication

ORIGINAL QUESTION: I have multiple servers that all need to act as masters, as if one fails the next server kicks in and takes over. I'm just wondering what the best way to replicate is. All servers ...
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In a MySQL Master/Slave replication, what would happen if I write to the Slave?

Several Questions Would the Slave entry remain until there is an insert/update/delete to the table on the Master that could affect the Slave? If not, how do I ensure that the Slave is in-sync with ...
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Binlog - 'Race-like' Condition on Replication

I have a typical master-slave MySQL setup. Slave is in test mode currently. Master is heavily used. I am noticing something that looks like a potential race-like condition on the slave. On occasion, ...
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Run SQL Server Snapshot Agent automatically

I am trying to setup automatic transactional replication. Basically I have some script files that are executed after each other. They set up a replication from one server to another and this works ...
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How to move data from Primary Data File to other data file without destroying replication

I have one Database which is replicated using transactional replication. Now, I want do spare some data of that database to another partition, because my server running out of disk space. I was ...
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setting up a local database to be updated from a master database

I'm looking for an efficient way to keep multiple databases (on different servers) sync with a master database (also on a different server). Mind you I only need a one way sync (from master to all ...
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Is it advisable to have MySQL Master/Slave running on the same physical server, on the same mysqld, sharing the same disk?

my Use-Case : The solution I am developing is very data oriented. I run a cron job every 3 hrs to read lots of records from a file, process them and store them in the database. I also need to ...
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2answers
7k views

Does MySQL support replicating all databases?

I’ve been doing some investigation into properly configuring MySQL replication. From what I understand after reading the documentation, you can only replicate specific databases, and each database ...
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Master and Slave having same id's

I am working as a remote DBA for some of the production servers. There was replication from Master to Slave. There is something changed in the scenario they have made one of the Slaves as master ...
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974 views

In SQL Server 2008, is possible to one database subscribe 2 publications for the same database? (merge replication)

I'm trying to set up an high availability architecture using merge replication. I have 3 databases, and I'm trying to keep them all up to date with merge replication. So far I've manage to create one ...
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PostgreSQL replication: out-of-sequence timeline ID, when former master made slave

I've configured master slave replication in PostgreSQL, following this tutorial: http://wiki.postgresql.org/wiki/Binary_Replication_Tutorial#Binary_Replication_in_6_Steps It worked fine. Now I've ...
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Can I have different publishers and one subscriber in replication?

I have the same databases in three cities which each database have three tables: 1- tbl_worker 2-tbl_workshop 3-tbl_users and cities are:city1,city2,city3 city2 and city3 insert informations in ...
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Dropping then adding a table to a subscription with Identity option Not for Replication causes errors

We have a Transactional Replication environment that was initialised from a backup that replicates the data for several hundred tables. When a table is altered, say a new column added, I have created ...