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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Real time replication issue - can't use transactional replication

We have an existing Microsoft SQL Server 2008 R2 database that we need to real time replicate to an identical off-site live web database. Transactional replication and merge replication will not be ...
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934 views

Transactional replication from SQL Server 2000 to 2008

I have legacy databases on two SQL Server 2000 servers that I am trying to replicate to a SQL Server 2008 R2 database using transactional replication. The 2008 server is not in the same LAN, so I am ...
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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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5k views

Pgpool install - libpq is not installed or libpq is old

Based on the documentation here, I want to create a pgpool II with PostgreSQL databases. When I try to install, I encounter this error: configure: error: libpq is not installed or libpq is old ...
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4k views

How can you stop MySQL slave from replicating changes to the 'mysql' database?

I have my slave set to not replicate the 'mysql' database as described in this SHOW SLAVE STATUS\G; Slave_IO_State: Waiting for master to send event Master_Host: 127.0.0.1 ...
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3answers
668 views

How can I replicate MySQL data from many servers to one?

All over the internet I can find manuals on how to replicate databases from master(s) to slaves. What I need is to continuously keep a copy of table from 5 different servers in sync. We have one ...
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4answers
179 views

Replicating only changes made by a specific database user

I am performing parallel testing. We have upgraded the legacy batch jobs to a new framework which we need to test against the existing batch jobs. In the existing setup, I have web application which ...
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1answer
603 views

Can I replicate to a pre-existing database?

I am going to test this out, however I'd like to know what the forum would say. I have 2 SQL servers with replication setup between them. I am now adding another new SQL Server and I want this one ...
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2k views

Does SQL Server Snapshot replication completely copy the data every time or does it issue deltas?

I am looking at snapshot replication between two servers. Here is what I have: 500GB database ~500MB nightly bcp loads ~50MB daily transactions I was asking other DBAs in the company about which ...
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2answers
352 views

Can I replicate views with Slony?

Can I feed some SQL that creates a view to Slony? I have some SQL that does CREATE OR REPLACE VIEW name_of_view and so on, passes it to slonik_execute_script, and then tries to run slonik_create_set ...
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1k views

Some queries slower in MySQL 5.5 than 5.0?

We have an exceptionally inefficient process (1.3 million selects, 232k updates) that I'm now recoding to be 1 select and 50 updates. In the meantime, though, today's process ran. We recently updated ...
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1answer
87 views

Replicate from master-master setup

I have MySQL Master-Master replication on 2 servers. I want to replicate to another slave server. When I configure the slave to replicate from master1, only data added on master1 is replicated. ...
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3k views

Looking for an efficient way to fix “Could not parse relay log event entry…” error

I have a corrupt relay log in MySQL 5.0 and looking for the steps to fix replication without having to reprocess all the binary logs from the master again. Here is the full error message if you are ...
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1answer
3k views

Slave I/O thread dies very often

I have MySQL Replication working between two servers in master-master mode. Replication has been working from day 1. The IO Thread and the SQL Thread has never died. However, the Slave SQL thread ...
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2answers
2k views

Replicate DB2 table to SQL Server 2008

I need to replicate data from a DB2 database into a SQL Server Database (along the lines of about 80 tables). I can create an SSIS package, to just flat copy the data from one to another pretty easy, ...
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1answer
1k views

MySQL Master-Slave Replication Cross Database

I am setting up Replication for cross Database as i have set 2 variables in Slave' s my.cnf as replicate-do-db=database_name and Replicate-wild-do-table=database_name.% ,But i am not able to get ...
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1answer
164 views

Is MySQL replication suitable for a Write Mostly application?

I'm considering adding another server to my one-server setup application with 600GB MySQL DB. The db and the apache are both running from the same server. In order to avoid backup downtime and improve ...
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2answers
237 views

PostgreSQL replication and large import

I am tasked with making large PostgreSQL imports to master instance, and then replicate it across the nodes as read-only data. Still, the CMS system has to be able to write data and replicate across ...
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2k views

Removing Archive Logs after PostgreSQL PITR online-recovery

I'm using pgpool-II + PostgreSQL 8.4 on three servers: primary + standby1 + standby2. Replication mode is "on" Load balance mode is "on" (between primary and standby1) I followed the official ...
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2answers
979 views

How to resolve the master server shut down/unavailability in mysql with master - slave replication

Let us suppose that we have a master/slave setup and the application is running fine for the time being. All of a sudden the master server suddenly shuts down due to some problem. Now how can I ...
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1answer
1k views

Replicating multiple databases into one database

I would like to replicate multiple databases on different servers into one master database. I have 5 different instances on separate servers all running SQL 2008 R2. The schemas and structure are all ...
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1answer
442 views

MySQL : Does 'bytes_sent' and 'bytes_received' include mysqldump data?

I'm trying to estimate my db traffic not including backups (mysql 5.1.41). I use show global status; to get the parameters bytes_sent and bytes_received. Questions Do these numbers include ...
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2k views

MySQL replication fails due to duplicate keys after master is restarted

I'm new to MySQL load balancing, I want to try the master-slave concept. Whenever I setup master-slave for the first time, and both have up-to-date fresh data, that works perfectly fine. However, ...
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MySQL replication backup

How to take MySQL Master-Master and Master-Slave replication backup?. I have setup Master-Master replication with a separate slave for each master on Ubuntu. What happens if, I issue or schedule ...
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2answers
988 views

Rows already DELETEd on MySQL slave; How to DELETE on master?

I have a handful of rows that exist in my MySQL master but not in my slave. Replication is running ok and these rows are unlikely to ever be referenced as it is a store-and-forget type of table. ...
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1answer
128 views

MySQL - Partially restore binary log

I have restored a dump into MySQL. I also have a binary log, which I want to partially restore, let's say from position 10 - 2500. How can I do that?
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1answer
135 views

Reformatting master MySQL server and temporary solution

We have MySQL master and replication servers both running on different machines. We have noticed some system files showing integrity issues in the master machine. Temporarily we would like to make the ...
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1answer
722 views

Safely promoting master to slave

Previously I've asked the similar question MySql Switching Masters During Failover with log-slave-updates. Let's say this is our current replication In addition, I have few application servers. ...
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1answer
310 views

Clarification about master slave configuration in mysql

We are planning to migrate an existing MySQL database to a new server using the MySQL replication master slave procedure. Unfortunately this will take a lot of time so we were thinking of doing a ...
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1answer
192 views

How not to distribute reads in pgpool

I want to use pgpool to replicate one database to another. I want to do my processing on my master database (reads/writes/inserts/deletes), replicate that database to another database as it is ...
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2answers
1k views

Mysql database replication on different vlan/subnet/another site

Saw the posts for "MySQL high availability, failover and replication with Latency" Is it possible to work it in a DR site when its not in the same vlan?
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1answer
12k views

Deleting bin logs in replication environment

I have a question about deleting binary logs in the replication environment: We have an environment with 1 master and 2 slaves (running mysql 5.5). Sometimes, we run into a space issues during heavy ...
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1answer
497 views

Default Constraints with Merge Replication

I am using merge replication in SQL 2012. Why can't you mark default constraints as NOT FOR REPLICATION? You can disable all default constraints for a merge article, but it is all or nothing so it ...
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1answer
821 views

mysql “Unsafe statement”

I get a lot of following messages Unsafe statement written to the binary log using statement format since BINLOG_FORMAT = STATEMENT. Statement is unsafe because it accesses a non-transactional table ...
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1answer
6k views

Best solution for cross-datacenter MySQL master-slave replication

We are working on a new system architecture for our company. We have a HPC, which runs in our own data-center and we are planning our front-end and a fallback system on Amazon Web Service. System ...
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1answer
1k views

SQL Server considerations when backing up / restoring a database that uses replication

In the event that I need to restore a database involved in replication, what considerations to I need to keep in mind? Do I need to keep backups of both the publisher and the subscriber? Can I ...
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1answer
195 views

How to use MySQL Server 5.6 for GeoIP replication?

I have downloaded the new MySQL Community Server 5.6 and I dont quite understand how to use it properly for GeoIP based replication across 20 nodes. I want to have one central node, then three smaller ...
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1answer
625 views

MySQL proxy and SHOW PROCESSLIST query time

I have MySQL replication currently occurring between two masters bidirectionally, one in a data center locally, another over at Amazon EC2. Everything seems to function normally replication wise, no ...
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1answer
638 views

PostgreSQL hot standby promotion, multiple hot standbys

I'm trying to work out failover and disaster recovery procedures for a cluster of three servers. Streaming replication is being used with a high wal_keep_segments, no log shipping is happening. I need ...
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1answer
2k views

Can I have an InnoDB master and MyISAM slaves with Full-Text for searching?

I'd like to use InnoDB on the master, for its transactional ability, but MyISAM on the slaves for the full-text search ability. Is this possible?
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2answers
687 views

SQL Replication Commands

I'm trying to figure out how i can get the number of commands over the last day for a sql server replication. Transactional / Snapshot / Merge. I really want to be able to calculate the average ...
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1answer
328 views

Why Regenerate Snapshots For Merge Replication

I am in the process of implementing merge replication in SQL 2012 with web sync. I am wondering two things, Why is it suggested to regenerate the snapshots every 14 days by default? With web sync ...
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1answer
81 views

In SQL Server Replication, at what point is it recommended that one separate the distributor?

Is there a general rule of thumb for when it becomes good practice to assign distribution responsibilities to a separate server that is not also a subscriber? e.g. "At n publishers/publications ...
2
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1answer
282 views

Will mysql_secure_install script block master updates to slave?

I had setup two virtual mysql database servers in two oracle linux 6 vm's, which come with mysql server ver 5.1.47 Master named prod_master & slave named prod_slave1. I installed both the mysql ...
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1answer
397 views

Slony initial subscription is causing out-of-memory kernel panics. Why?

Context: We run Slony 2.0 with Postgres 8.4 on two CentOS 6 servers--one master, and one slave. Our database is about 30GB in size, which isn't unusual, but we do have a couple of tables that are ...
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1answer
907 views

Merge replication - can't create snapshot – timeout

I have a SQL Server 2008 database, and I need a merge replication because I want to sync with mobile devices afterwards. So I created a replication but when it comes to start the snapshot agent, the ...
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0answers
336 views

Msg 14027, Level 11, State 1, Procedure sp_MSrepl_addarticle [table] does not exist in the current database [closed]

Before setting up SQL Server snapshot replication, I backed up the database from ServerA and restored it to ServerB. Both servers are running SQL Server 2008 R2 SP1. In trying to setup snapshot ...
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2answers
4k views

Streaming replication and failover on PostgreSQL

I am doing a proof of concept on PostgreSQL replication. After the discussion on forum we decided to go with streaming replication as the performance is good compared to other solutions. PostgreSQL is ...
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0answers
62 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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2answers
1k views

Log Reader replication agents are constantly restarting

I am recreating (push) transactional replication from a SQL 2000 instance to a SQL 2008 instance which I had to break in order to do a db migration. The 2008 instance is both the distributor and a ...