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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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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4 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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21 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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15 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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15 views

What is the difference between MySQL Innodb log files and MySQL binary logs? [duplicate]

I know that this question might sound a little dumb but I want to know exactly what is the difference between those 2. I know that the binary logs (log-bin variable) are used mostly for replication ...
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44 views

What are the alternates to replication? [duplicate]

I don't have any experience with database administration. What are the alternatives to replication in SQL Server (one-way)? I am looking for an alternative mainly because of the licensing. The ...
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1answer
20 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
49 views

3 Node Replica Set all became SECONDARY

my 3 set replica set all became secondary and I'm not sure why. db1 2014-12-12T02:43:55.067+0000 [conn1413096] end connection 10.0.64.12:58483 (512 connections now open) 2014-12-12T02:43:55.067+0000 ...
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1answer
14 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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1answer
17 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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1answer
20 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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8 views

Backing up AWS database to an on premise server

I have 2 questions - 1) Are there tools, AWS provided or otherwise, which can continuously backup a cloud-based database (Postgresql RDS) to an on-premise server ? 2) I want to do this, so that I ...
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19 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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17 views

Transactional Replication Snapshot Agent Error [closed]

While running the snapshot agent for transactional replication it gives the error " Failed to read column data " I have recreated the replication and reinstalled SQL server twice...but no ...
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1answer
24 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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20 views

mysql replication not working [on hold]

I have a problem with mysql replication which I've set up almost 2 month ago .. Here are the snapshots from phpmyadmin : http://i.snag.gy/xrEzW.jpg http:/i.snag.gy/Pa0Uo.jpg ( first problem ...
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1answer
26 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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1answer
20 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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1answer
85 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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1answer
9 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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0answers
29 views

Best database replication technique for a very unstable (power wise) network

I am part of a small network (500 users) who are all connect via WiMax to each other. The people connected to this network live in about a 70 km radius. This network allows for a transfer speed of ...
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22 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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0answers
10 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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0answers
14 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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19 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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1answer
47 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 ...
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16 views

Mysql Multi master replication - auto_increment for tables with natural primary key?

I am thinking about using Master-Master replication using Mysql 5.6.19 with InnoDB as the engine. From what I have been reading, looks like I should be using auto_increment_offset and ...
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1answer
42 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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1answer
13 views

I couldn't see Conflict tables in replication monitor SQL Server 2008 R2 in Merge Replication

I work with merge replication in SQL Server 2008 R2. In the replication monitor I can't see conflict table, I must to see conflict tables in "MSmerge_conflicts_info", please help me. How to see ...
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223 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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1answer
32 views

SQL Server 2008R2 - how to install replication components

I am trying to install the Replication components for SQL Server 2008R2, on technet website it says: On the computer that is running IIS, insert the SQL Server 2008 R2, SQL Server 2008, or SQL ...
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47 views

Oracle Data Pump Import with running advanced replication

In our system we have a running advanced replication between two databases(11g release 2) and want to use pump import to import a backup on one site. However the imported data is not replicated to the ...
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2answers
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MongoDB replicaset number of connections too high

I'm using a 3 node replicaset with 2 data nodes(version 2.6.1 and 2.6.3) and 1 arbiter node. I get frequent alerts on number of connections >1000, whereas total databases are about 400 and also I'm ...
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18 views

MYSQL Group Replication

I have setup a Master-Master-Slave replication where say A B and C, I want to replicate data from A to B (which is working) and B to C (also working) and from A to C which is not working with two ...
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16 views

Question on turning on GTID for MySQL master and slaves

I came across the interesting article by Facebook's Engineering team where they were able to deploy GTID in MySQL at a large scale : ...
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2answers
16 views

Is there a way to replicate certain part of collection in Mongodb

Is there away to stream certain part of collection in MongoDB or TokuMX from master server to another server? I need to duplicate only certain collection Or if it isn't possible, are there any other ...
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1answer
16 views

Multi-master synching in three geographically separate datacentres

Our company needs to create an application that operates in all parts of the world. We are looking to have three servers (one in Europe, one in Asia and one in America). I'm looking to use ...
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26 views

Postgresql - Streaming replication - STONITH

Current situation: PostgreSQL, streaming replication Master failed, I created the trigger file. Slave is promoted to new master After the old master restarted successfully, I have to create base ...
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1answer
27 views

Problem Getting Simple Replication to Work in SQL Server 2008/2012

I can't resolve a problem with replication. The publisher/distribution side seems just fine, but when I subscribe and view in the replication monitor I always get this error: "a required privilege is ...
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1answer
28 views

Can any one Explain me What is the Use of Cascading Replication in Postgresql?

What are the advantages of cascading replication in PostgreSQL. I have done Testing On this With three nodes. M1---->S1----->S2 What is the Use if My master(M1) goes Down(failover). Where the ...
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1answer
145 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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21 views

Sudden (and drastic) decrease in commands/second on replicated slave

On a slave that uses statement-based replication from a failover of master (all running mysql 5.6), the number of queries executed per minute has suddenly decreased from ~20k during peak traffic to ...
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4 views

PostgreSQL Replication delay debugging

I've got a cluster of 9.1 servers running streaming replication and using WAL-E based log shipping for when that falls behind. Generally speaking it's a pretty solid setup and does not fall behind, ...
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2answers
24 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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1answer
11 views

Replication on same physical server [duplicate]

I am new to DB. We have galera cluster on Test environment where mariaDB is replicated in 3 servers. Now customer want us to work with only 1 server. they cant provide 3. Can we do replication on ...
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15 views

MySQL Remote Database Failover: Need Advice

I run a network of sites all on 1 server. To improve performance, I'm (finally) moving the MySQL database to a remote machine. I'd love anyone's advice on how to appropriately approach failover. ...
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34 views

Reset relay files on lagging slave after MySQL crash signal 11?

MySQL crashed on this slave server with signal 11: Error reading packet from server: Lost connection to MySQL server during query ( server_errno=2013) Slave I/O: Replication event checksum ...
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1answer
24 views

MySQL Circular replication with fail over

I have 3 MySQL servers which is running with circular replication. Server A version - 5.5 Server B version - 5.6.21 Server C version - 5.6.21 Master Server FOR Slave Server C ...
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3answers
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Question on having a MySQL 5.1 replicate from a MySQL 5.6 DB

I have a question in regards of what potential issues that might happen with a MySQL 5.1 DB that replicates from a MySQL 5.6 DB. I know the risks involved based on resources such as ...
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43 views

Laggy slave OK to have only one system user in processlist?

In all the examples of a processlist on a mysql slave I've seen, there are two system users. I have a slave that is very far behind the master. When I do show a processlist, there is only one system ...