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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Transactional Replication - Replication Order of Related Tables

** This was previously asked on Stackoverflow - I removed it from there and recreated here ** I have an issue with SQL Server Transactional Replication. My topology is as follows (and this cannot be ...
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24 views

Transfer Data between 2 organizational domain

Please consider the following scenario: Company A manages the IT Infrastructure of Company B. Company A is located in US and has SQL Server 2014 Enterprise Edition. Company B is located in UK and has ...
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49 views

Saving replication latency for monitoring purposes

I have SQL Server 2012 Enterprise edition, transactional replication. many servers, many DBs. This morning I come to the office and been told the latency on some databases was about 30 min behind. I ...
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83 views

Is it possble to replicate MySQL server on Azure virtual machines

I have two Windows Server 2012 R2 virtual machines on Azure. I need to replicate the database on each of the windows servers. I have followed this link but I am not getting the connection between the ...
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130 views

Replication monitoring refresher for distribution job affecting performance

I have a performance problem due to a sql agent job executing dbo.sp_replmonitorrefreshjob. The environment is a 2 node Cluster with SQL Server 2005 SP2 and with transaction replication. The OS ...
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116 views

SQL Server transaction replication agent error

We are running transaction replication on SQL Server 2008 R2 SP3. Distribution agents are reporting : "Agent is retrying after an error. 3 retries attempted" every 10 minutes. Tried changing ...
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34 views

Replication / Bulk Update between Servers

I'm looking to update several tables between two servers daily to have a replica of the data available. My question is, what is the least resource heavy and most effective method to implement this? ...
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73 views

Mysql Percona 5.6 slave lags gradually

I have got into slave lag gradually say every minute it lags around 5secs on slave. So it started morning 10AM the Seconds_behind_master was 13. Now at 4:30 PM it has reached to 560. No variable ...
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48 views

MySQL replication slave of slave not receiving updates

I have 4 servers: A, B, C and D. A and B are in a master-master setup. C is a slave to B and D is a slave to C. Changes on A or B get to all nodes other than D. I need them to get to D Changes ...
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Which Postgresql Replication Solution to Use? (Asynchronous Multimaster / Bucardo?)

First, I'm not a DBA, so pardon me if any of this question seems "off." I've written a peer-to-peer multiplayer game (the client) which connects to one of multiple servers for match making. ...
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43 views

Mysql replication problem after export/import on already working replication

I have 2 databases in master - slave replication. I had some errors in the replication due to inserts in the slave, so I corrected it and executed: stop slave; set global sql_slave_skip_counter=2; ...
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61 views

Why database replication fails when database mirroring is broken?

I'm trying to understand what effect database mirroring can have on replication in SQL Server 2008. Here is current environment: (don't ask me why it was done this way or to change it) Server A: SQL ...
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100 views

Sql Server 2008r2 Replication Snapshot Agent Hang

I am setting up a new merge publication, but I can not get the snapshot agent to run successfully. In fact, I can not run any snapshot agents for any of the other publications on this server now. ...
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2k views

Strange MySQL replication error 1146 (Table doesn't exist)

I'm getting a very weird MySQL replication error No. 1146 for a REPLACE INTO query on a slave host replicating all tables in all databases from a master, and I'm having a bit of a hard time ...
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41 views

Error “Slony-I creation script not avilable ; only joining possible” in SlonyI replication using pgadmin3

I am facing the above issue while Creating a base replication objects like database etc.. As a workaround i have done the changes like editing the options of Binary Paths in Pgadmin Console but no use ...
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356 views

Upgrading mysql percona server from 5.5.40 to 5.6.71

2014-12-26 05:18:20 13215 [ERROR] Native table 'performance_schema'.'events_waits_summary_by_user_by_event_name' has the wrong structure 2014-12-26 05:18:20 13215 [ERROR] Native table ...
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1answer
32 views

MySQL replicated tables for Cognos BI

the Business Intelligence guy is asking for faster machines, latest software etc. and some of his customers are complaining of query times in excess of an hour. The tool is Cognos/Insight and the DB ...
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1answer
264 views

Mysql binlogs exists, show binary logs is empty

I am working on a replication setup and have turned on bin-logs. I have moved my mysql datadir to a new location as well as the binlog path From my.cnf datadir = /vol/data/mysql ...
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29 views

SQL Server 2008 R2 - Change distributor schedule

We have configured SQL 2008 R2 replication. Distributor is configured in continuous mode, publisher is scheduler is set to execute after every six hours. Now we want to change distributor schedule ...
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5k views

Temporarily Disable Sql Replication

Due to a business need, I may need to disable transactional replication in my environment (Sql 2k -> Sql 2008). Functionally, I understand this to mean that I will need to drop subscriptions and ...
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42 views

Mysql Master-Master Replication Error

Configured Master-Master Replication But both servers slave shows the below error !! Last_IO_Errno: 1236 Last_IO_Error: Got fatal error 1236 from master when reading data from binary log: ...
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1answer
10k 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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48 views

What should be the ideal network configuration for a Postgresql Streanming Replication and PgPool HA setup

I have the following configuration using Pgpool, Postgresql with streaming replication. Pgpool is used for load balancing and automatic failover. .-----. .--------. | | ...
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460 views

Huge size on mongodb's gridfs. Should I compact?

I’m running MongoDB and grid.fs to store small files (less than 20mbs). These are part of a replica set. I currently have more than 350000 files stored. I’ve noticed that the chunks collection takes ...
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294 views

Percona XtraDB Cluster/MariaDB Galera Cluster - replication suddenly stops working, cluster thinks it is in “Synced” state

We are trying to populate an empty Galera cluster using myloader. We use the latest version of myloader from repo trunk, the command is as follows: /root/mydumper/myloader -d ...
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936 views

The process is running and is waiting for a response from the server - transactional replication

I could not yet figure it out why one of my transaction replication subscription is constantly coming out with the following annoying message: The process is running and is waiting for a response ...
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31 views

Mysql Master - Master Replication

i have established a master A and master B replication between two servers.Both are getting replicated.But it is limited with only one database. My questions 1.How to create a new database in ...
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96 views

Is it possible: MySQL semisync and async replication on same master-slave pair?

I want to use master-slave MySQL (or MariaDB) replication to remote server as data protection from hardware failures. I have two goals: to keep low response time and don't lose important data. Good ...
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2answers
2k views

How could one monitor MySQL replication?

I am not a DBA, but I am interested in knowing how replication monitoring is done on MySQL severs. In order to know if a slave is in sync with its master, one would typically check ...
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24 views

MySQL multi masters with replicas

Currently I have a Master-Master setup, however there is a need to create replicas servers in geographical areas. I am trying to figure out the best method to handle this. The kicker is not all ...
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65 views

The message “Running the Merge Agent process would exceed the maximum number of processes allowed” appears, but it doesn't seem likely

The full text of the message is "Running the Merge Agent process at this time would exceed the maximum number of processes allowed by this publication. The process will run when resources become ...
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1answer
63 views

MySQL slave replication permission error

I am having a rather frustrating issue. I have granted replication client to a user on the slave instance of MySQL. I can login using the username and password. I can exectute "SHOW SLAVE STATUS;" but ...
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1answer
29 views

MYSQL binary log file not capturing in slave machine

mysql binary log files are not getting captured in slave machine, its available in master machine. When i check the binary log files its of size 1kb without any data in slave.
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62 views

MySQL replication for non-standard port (3306)

I want to do MySQL replication using MySQL 5.6.14 under MS Windows 2008 R2, the port for Master and Slave should be 1000 (master database on PC1, slave database installed on PC2 I added the following ...
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125 views

'DROP TABLE mysql.failover_console;' replicates to slaves, but 'Use mysql; DROP TABLE failover_console;' does not

I am currently looking to setup automatic failover for my MySQL 5.6.21 Master on CentOS 6.6. I have mysqlfailover set up in my lab, and it is working well enough. My question is not about that, but ...
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1answer
29 views

Database structure setup

We're currently in the process of moving our hosting services to something which will allow us to scale our infrastructure and requirements. Essentially we're using MySQL to: Run our websites. Run ...
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2answers
771 views

“Arithmetic overflow” when initializing SQL Server 2012 replication from backup [closed]

I'm initializing SQL Server replication from a backup, by following instructions from here: http://www.mssqltips.com/sqlservertip/2386/initialize-sql-server-replication-using-a-database-backup/ ...
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1answer
38 views

Does Galera Cluster rsync only updated files or all files

We're currently setting up a galera cluster using rsync for sst. The datadir is currently 20Gig and right now we're only updating about 4 (very large) tables. I know that rsync normally only ...
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1answer
27 views

MySQL replication mystery

May I ask if its possible to have a table on Slave server. But it does not exist on Master Servers? how come this one happens? Thank you.
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57 views

MySQL Cluster Replication Merge

We'd like to have two MySQL cluster groups, and at the same time have replication set up between them. Is that possible?
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119 views

Offsite Log Shipping

We currently use CDC to replicated our Production DB offsite (Microsoft SQL Server 2008 R2), but using CDC and the way we process the files is very unstable. Also note that the two servers cannot ...
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69 views

ALTER TABLE blocking in MySQL 5.6

I have a question with a MySQL 5.6 master-slave setup. If I were to modify the master's schema with an ALTER TABLE SQL query, then when the slave tries to execute that ALTER TABLE statement too, would ...
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4answers
605 views

Transaction Log won't shrink, DB thinks it is replicating

I've got a SQL Server 2008 R2 Express database running Kaspersky Security Center, and I have no idea under what circumstances the install happened, but the database appears to think that it's being ...
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2answers
32 views

MySQL rapid Data Replication from multiple Databases

I am a Freelance Web Developer but not a Database Administrator at all except basic Database Operations like DML etc. Today I got a client asking me to develop a Web based application but there is a ...
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220 views

SQL Replication With Always On Availability Group

We have an always-on SQL 2012 availability group with two replica servers and an AG listener. Doing merge replication via anonymous subscriptions through IIS between SQL and multiple remote clients ...
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2answers
71 views

Mysql replication from existing slave to new slave

I'm hoping you experts can help advise me, I've got this topology: Live DB(Master) ----> Backup Server (Master and slave) ----> Test DB Backup server is a slave of Live DB, and Test DB is a slave of ...
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67 views

mysqldbcompare showing AUTO_INCREMENT differences but there are no missing records

I am encountering a strange issue when using mysqldbcompare to compare two MySQL DBs(one is a master, the other its slave). I noticed that the tool notes that the AUTO_INCREMENT values of this ...
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352 views

How to solve MySql Slave Error 1452 Foreign key constraint fails?

I am site administrator. We use to have a mysql 5.5.40 master(db01) - slave(db02) setup. One day our master server (db01) got down due to hardware failure. So we switched our site to slave (db02) ...
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21 views

Replication lag is causing issue on one shard

I am running a mongo db sharded cluster with two shards. Each shard has one primary, one arbiter and one secondary. On one shard I am facing an issue with replication as it is showing this result ...
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181 views

Best practise how to sync SQL Server 2014 database with other database

What is best practise if we have application using a SQL Server database and we would like to have backup if SQL Server does not work? Our scenario: We would like to use our main SQL Server ...