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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283 views

How to add an article to existing replication

This is the first time I am going to add tables to replication. I have outlined the below steps to add a new table to existing replication. Please correct me if I am wrong. The table is just created ...
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2answers
78 views

Masking or substring data while replicating data

I have a table that has some unencrypted data that needs to be replicated to another server. I want to do : Mask the data with an x except the last 5 characters e.g. xxxx12345 just replicate ...
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352 views

row-based replication with slave triggers

I'm replicating a prod MySQL database to an analytics one. I need to drop several tables with sensitive data from the analytics and also redact several columns of several remaining tables, replacing ...
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1answer
539 views

SQL Server - Snapshot Agent won't start [closed]

I have successfully set up Replication. The problem is Snapshot Agent won't start. When I try to start it manually I always end up with "The agent has never been run." Publication runs under the ...
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1answer
111 views

Postgres streaming replication to a different schema on another server?

We've got a system with about a dozen Postgres 9.3 databases representing a dozen different applications. In order to do reporting across systems, we have a script that dumps each database and loads ...
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1answer
105 views

SSIS v/s Replication v/s logshipping

I have 2 SQL server instances, on different servers. One is Production instance and gets lots of reads and writes daily. Another one is for external applications to use a copy of few of the tables ...
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2answers
333 views

SQL Server replication service in Amazon RDS

I have a local infrastructure with multiple SQL Servers. Some of the servers have replications services to copy some data to a master database. Is it possible to have the replication services to work ...
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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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1answer
46 views

Automatic Failover without data replication

I have a need to be able to automatically failover my databases and most need data replication. However, one database does not need data replication and so, for performance reasons, we do not include ...
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1answer
45 views

Replication in mysql with many servers

There are 3 shops. In each of these is a mysql server. I want all servers to synchronize their date if at least one server changes the date. I read a bit of literature and realized that I need ...
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24 views

mysql safe mode running caused replication failure

I have been using database replication (Master-Master) in two of my server's running Mysql over Ubuntu 12.04 LTS server edition. I had to reset the database root user password of one of the server ...
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2answers
207 views

How much RAM should you allocate a MySQL replication slave?

Our MySQL master is allocated 24GB of RAM (innodb_buffer_pool_size = 24GB), but was curious if there was some standard amount to allocate to a replication slave? Right now the slave is just used to ...
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3answers
95 views

How to remove master role from MySQL server

I have 2 MySQL servers, one is the master and other one is slave, that's all good. The problem I have is that the slave is also set up as a master. I would like to disable or remove the master role ...
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41 views

mysql replication

I have a master mysql server (M1) with two replicating slaves behind it. I also have another master mysql server (M2) with it's two slave servers. The slave servers currently replicate everything from ...
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2answers
58 views

SQL Server replicated databases swap

I have a SQL Server 2012 database. I would like to be able to make changes to this database or to it's replication, then make the replica, the real one. The point here is to have 0 downtime on ...
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0answers
1k views

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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1answer
51 views

Making data from one schema available to another schema

I need to make data that is currently in one schema available to a different user in the same Oracle database. Does this require that we replicate data from one schema to another? Or is there a ...
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0answers
25 views

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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1answer
54 views

How can I find out if any cluster member is offline in mongodb cluster?

I have a mongodb cluster with 1 master machine(running mongos and config service) and 3 slave machines(used as data store).But now,I find that one of 3 machines (192.168.10.11) is down because I can ...
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1answer
75 views

Log Shipping in lieu of replication

I have two SQL Server 2008 R2 systems that, due to network restrictions, cannot use SQL Server replication. However, data needs to be shared between these systems. It may be possible to send a file ...
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2answers
1k views

MySQL:How to correct a corrupted MySQL binary log on Master server?

We are using MySQL DB with one master and one slave. We are using this setup for months now. The slave sync stopped today and the error we got was: Last_IO_Errno: 1236 Last_IO_Error: Got ...
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0answers
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 ...
2
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1answer
73 views

How can I compare the server impact of transaction replication

We are developing a system that must extract data from an existing SQL Server 2008 R2 cluster. One of our design goals is to limit the performance impact on that cluster as much as is practical. ...
3
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1answer
760 views

Log Reader Agent is not running - The job failed

I created a transactional replication on PRE-PROD (via TSQL) and everything works as expected. On PROD platform replication is not working. While inspecting Replication monitor, I get this error ...
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1answer
852 views

Master - Master replication Duplicate entry

I've got a Master - Master replication setup and it worked fine for a couple of days but I keep getting: Duplicate entry errors after a few days... My setup is as follow: One server in The ...
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1answer
86 views

How to know if logreader agent already exists?

I'm creating a script to recreate a database for test purposes, and the database has some publications. In order to create or not the logreader agent I need to know if the current database already ...
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1answer
132 views

Transactional Replication: can create 52 publication, but creating 53rd leads to problems

My apologies in advance for a long post, but I was really trying to make sure I do my due diligence before turning to the community for help, so here it goes. I am working on a proof of concept with ...
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32 views

Transactional Replication Update process

I need to create report using ssrs. for that i create the main table contains the values from nine other tables which is the Source tables. Now the new source tables which are used for main table are ...
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1answer
97 views

Mysql replication dump without down time? empty sql file

I try to create dump as replication master data and use followed command to create dump, but sql file only contains paramters and there is no data and structure. The command is : mysqldump ...
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1answer
134 views

Drop & re-add subscribers to transactional replication

I'm trying to get Stored Procedures to execute on the subscribers, as seems to be best practice. I already have transactional replication running happily. I add a new sproc, and set properties of ...
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1answer
25 views

Permission error replica set

I'm having some trouble with intentionally removing a secondary from a replica set. I'm trying to simulate unexpected shutdown. My replica set consists of one primary and 2 secondaries. When I shut ...
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1answer
354 views

MySQl master - master replication not working [closed]

I'm trying to setup a master - master setup and I see both masters connect to each other in workbench: server 1: -- Thread Id: 112 -- User: slave -- Host: 207.244.73.38:55164 -- DB: None -- ...
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1answer
63 views

Start mongod instance on replica set as background job

I have setup a Mongodb replica set with 1 secondary node. When i execute on secondary sudo mongod --replSet rs0 --dbpath /data --port 27017 --oplogSize 700 The primary and secondary nodes are ...
2
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0answers
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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107 views

Replication Monitor Missing Subscriptions in Watch List

In Replication Monitor, for one of our publications (transactional replication), none of the subscriptions are showing up in the Subscription Watch List. This is new behavior that just started ...
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1answer
39 views

Moving large database to another drive, how to measure performance before, and setup some type of replication for fast fail back?

Sorry if this is kind of more than question at a time, but here goes. Running SQL Server 2008 on windows server 2008 as well. We have a large database just over 200gb right now (it holds images of ...
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1answer
46 views

Changes to main Database during Transactional Replication

Can you please advise how can I keep slave database up to date while it's in transactional replication with master. I mean what If I change indexes, columns, tables or sthm else in master dabase? ...
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1answer
80 views

How do Identity Columns get Replicated?

During Transactional Replication, we have data going from Server A to Server B. Say we were to reseed an Identity Column on a Table on Server A (for whatever reason), how would this affect the data ...
4
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1answer
555 views

What are the drawbacks of using Galera Cluster instead of Master/Slave Replication?

What are the drawbacks of using Galera Cluster instead of regular Master/Slave Replication? Galera's 0 slave lag time, Synchronous replication and no Single point of failure seem very appealing then ...
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1answer
86 views

Max allowed packet changed still replication not starting

Suddenly I notice my replication stopped and first I got some primary key duplication error when I checked using the show slave status\G. Then I remove those lines and restarted and ending up now with ...
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3answers
631 views

Using SQL Snapshot Replication to refresh TEST databases from PRODUCTION. Why not?

What are the drawbacks and downsides? We want to schedule automatic nightly refreshes of 20 databases, approximately 1GB each, from the PRODUCTION server to the TEST server. We're setting up SQL ...
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2answers
198 views

What locking can I expect with DBCC CHECKIDENT(RESEED)

I'm working on a project that has hit a bit of a snag: I'm replacing some replication with a home built system so that if replication goes down we don't blow our SLAs with our customers and shell out ...
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1answer
69 views

SQL Server 2000 Replication, Performance, and Query Priorities

I'm a developer and wanting to confirm the following: Does anyone here have experience with SQL Server Replication (transactional) on 2000? We are trying to convince the DBAs to allow this in a ...
3
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1answer
100 views

How to upgrade MySQL (5.5) production DB to 5.6 with minimal downtime

Our existing Database size around 200GB. We want to use consistent, parallel backups methods. For testing, I migrated my Development DB from 5.5 to 5.6 by running mysqldump with option ...
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104 views

Slave fail first due to duplicate primary key then corruption error

I have a mysql db running the slave very well for few months. Suddenly today I notice it stopped since 18Nov. I check the status it was showing me the primary key duplication error. SO i stop slave ...
0
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1answer
177 views

exception: hosts cannot switch between localhost and hostname

I created a replication set. I added localhost in the set in the beginning, but when I try to edit the member with the actual hostname. I get error "exception: hosts cannot switch between localhost ...
6
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1answer
166 views

Can we use old primary to sync with standby after failover in PostgreSQL?

If my standby (postgres) is behind by few seconds before failover. What is the easiest way to sync back my old primary after failover in PostgreSQL. In Oracle we have the option of Reinstating a ...
0
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1answer
66 views

Is it any good for performance to have master and slave on the same server

There are similar questions on this site, but they mostly cover server failure and data backup aspects. I'm concerned only as far as query performance. If master and slave share the same resources, ...
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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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MySQL relay log corrupted, how do I fix it? Tried but failed

A MySQL v5.1.61 relay got corrupted when the machine suddenly shut down. I tried to fix it but it didn't work. — How do I fix it? Did I do something wrong? As far as I've read, corrupted MySQL relay ...