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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what will happen to the binary log if it reaches its maximum value ? Does it reset to mysql-bin.00001 again?

what will happen to the binary log if it reaches its maximum value ? Does it reset to mysql-bin.00001 again ? I know the below points exist means, there won't be any reset happen in binlogs. I ...
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29 views

How to fix my Merge Replication upload order?

I have several Merge Replication instances in production on SQL 2008 R2. One of them has started to behave oddly in that it appears to attempting to upload the children tables before it uploads the ...
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1answer
13 views

MySQL 5.5 Replication to Galera/Percona XtraDB Cluster

We are currently investigating moving our current MySQL 5.5 Master > 5 x Slaves (with Statement Based Replication, apx 250GB data and growing) to a HA clustering option. Mainly to provide greater ...
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3 views

How to transform Streaming Replication Master-Slave to Cascaded Master-Slave1-Slave2 setup?

I've setup streaming replication as part of HA solution on my production enviroment. I've two ubuntu servers PROD1 and PROD2. PROD1 is master and PROD2 is slave. In case of failover the slave database ...
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14 views

FATAL: terminating walreceiver due to timeout

1/ DESCRIPTION: Machine 1 (slave): Centos 6.6 , x64 , installed PostgreSQL 9.3 (on Local) Machine 2 (master): Centos 6.6 , x64 , installed PostgreSQL 9.3 (on Cloud) Machine 1 (slave) and machine ...
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3k views

Impact of changing the DB compatibility level for a Published replicated DB from 90 to 100

I have a SQL Server 2008 R2 server with a bunch of published databases that are currently operating under compatibility level 90 (2005). The subscription databases are also SQL Server 2008 R2, ...
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97 views

Can scheduled and continous replication configurations exist side-by-side on the same master/slave servers?

Environment We have a core sql server cluster. This cluster contains some databases that get replicated to a load-balanced sql cluster of currently 3 servers. These databases are replicated each 12 ...
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417 views

MySQL slave taking too long on “Queueing master event to the relay log”

I have two mysql mysql slave servers. The DB version is: mysql> show variables like '%version%'; +-------------------------+-----------------------------------------------------+ | Variable_name ...
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3answers
101 views

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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99 views

MongoDB can't add new replica set member

I have a replica set, and I added a new member to the set. The initialSync begins for the new member and rs.status (on primary) shows STARTUP2 as status. However, after a long enough time, there's a ...
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489 views

MySQL: Prevent DROP TABLE and TRUNCATE TABLE on Slaves

Can someone tell me how to prevent the following commands DROP TABLE <tbl-name>; TRUNCATE TABLE <tbl-name>; from being replicated to slaves?
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446 views

How to user the Tablediff Utility with Replication Filters

I am using merge replication in SQL 2012. I am trying out the TableDiff utility to show non convergence. I see a problem with this approach though. This is because I am using parameterised filters to ...
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32 views

Peer-to-Peer Transactional Replication Load Balancing in MS SQL Server

I'm looking at Peer-to-Peer Transactional Replication and it looks like a perfect fit for my requirements, but there's one unclear part - load balancing (see picture below). How it is implemented in ...
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1answer
229 views

Consolidated realtime mysql backup with master/slave setup or binlog

I have 20+ mysql servers and their have low write requirements. So, I want to see if any way I can replicate the data/binlog from these servers to a single slave so realtime backup purpose. If I ...
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9 views

What will happen when manager stops on source in goldengate?

As per my knowledge, manager is responsible for handshaking between source manager and target manager. Communication between the extract and pump process for providing reports Is there is a ...
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9 views

Failover_command in pgpool is not working?

I have setup the pgpool with load balancing and failover mode. Following is my failover_command='/usr/local/etc/failover.sh %d %P %H %R' The following is the script: !/bin/bash -x FALLING_NODE=$1 ...
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26 views

How does SIOS Data Keeper make consistent backups? [closed]

We are looking to change our DR solution to get our RTO and RPO as close to 0 as possible. We have around 80 databases on SQL Server 2012 sp2 that come to about 1TB in total including log files. I ...
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1answer
78 views

Can I change the default settings for SQL Server Replication

Is there a way to change the default setting in SQL Server replication? Example when I create an new article I want to have the create Non-Cluster set to true all the time.
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2answers
24 views

MySQL replication - how to read from slaves? manually?

MySQL Manual - Replication: "Scale-out solutions - spreading the load among multiple slaves to improve performance. In this environment, all writes and updates must take place on the master ...
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1answer
588 views

MySQL failover - Master to Master Replication

My company is trying to implement a MySQL failover mechanism, to achieve higher availability in our webservices tier - we commercialize a SaaS solution. To that end we have some low-end VMs scattered ...
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1answer
22 views

MySQL Replication Master Slave Architecture - Web app that is based on the SLAVE DB

We are developing a web application (Spring mvc based app) that uses a MySQL DB. (lets call it the "original app") The DB architecture uses a MASTER-SLAVE configuration with replication. The web app ...
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1answer
11 views

MySQL Replication, Can i add a trigger to the SLAVE db?

Is it possible to do so? The trigger will insert some rows into a unique table that exists only on the slave.
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121 views

Can a slave with a dynamic ip update the master

How can I setup mySQL replication in such a way that a slave on localhost with dynamic IP can update the master as well as get updates from the master which has a static IP. The slave will not be ...
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6 views

How to handle private local databases in a multiDB cloud environment

In context of Platform as a Service (PaaS), we would like to offer our clients a private platform. A platform includes a website and a database. A platform is not 100% separated. Users could "travel" ...
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186 views

Mongo DB Replica set Stuck at RECOVERING state

We have created a replica set and now the problem is 2 members of replica set [3 members set] are in recovering mode from 48 hours. Initially the size of recovering nodes was increasing and now even ...
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1answer
230 views

SQL Server replication conflicts after migration from 2000 to 2008

I got a suggestion over at Stackoverflow to post here....greatful for any and all help. Please bear with me I think this might take a while to explain. For many years now my company has hosted a ...
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2answers
19 views

Postgresql 9.4 high availability

I currently have a master postgresql 9.4 server containing many databases on Ubuntu 14.04. I tried to use Barman to setup backup, but would like to set up streaming replica so that when the master ...
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1answer
385 views

MySql replication from 5.1 master to 5.6 slave keep crashing

I recently updated one of the replication slaves to mysql 5.6. After importing a recent dump from the master, I run mysql_upgrade with no errors. the database deamon started correctly with no ...
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1answer
488 views

MySQL Master-Master Replication not syncing

SETUP: I have a WAMP MySQL Master-Master replication setup on 2 machines with sync_binlog=1 for safety. Machine config: Windows Azure Standard 2: 2 core, 4GB RAM, Windows Server 2008, MySQL 5.6.12, ...
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30 views

'accidentally' set 'CHANGE MASTER TO' on wrong server

while setting up the replication I accidentally did the 'CHANGE MASTER TO' on the master server instead the slave. When I noticed the mistake I just did a 'STOP SLAVE' on the master and setup the ...
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1answer
113 views

Relaying changes to a slave from another master with Tungsten on MySQL

I am trying to setup a multi-master type of replication with each master having an additional slave using Tungsten. As an example, lets say I have 4 hosts (A,B,C,D) and hosts A and C are the masters, ...
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1answer
545 views

MySQL relay log rotates too soon and too often

I have a simple master/slave setup where the slave is just a backup. Sometimes I notice that the relay log on the slave rotates too often and too soon, when it is still very small: 4:00 PM ...
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1answer
290 views

MariaDB Galera Cluster - nodes fail to start

This is a new installation (fresh VM and MariaDB install). For some reason, the nodes are having trouble joining the master server. The master server would pause at Preparing binlog files for ...
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1answer
31 views

federated tables? synchronization? replication? [mysql]

I have a REMOTE suppliers table with, lets say, a code and a name, and several client databases will be creating new suppliers. Server database code | name ______________ 1 | Mark 2 | ...
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1answer
27 views

Mysql master master with high latency

We have a single master setup with many slaves in germany and some slaves in australia. To have faster writes in australia we want a master-master setup between germany and australia. Read slaves ...
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9 views

Transactional Replication to a Version Two Versions Older--Count by Name or Number?

According to Microsoft SQL Server documentation, a "Subscriber to a transactional publication can be any version within two versions of the Publisher version." In this context, are versions named ...
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188 views

MySQL incremental backups per database (not global)

While searching for free/open-source MySQL incremental backups solutions I have found a number of ways to do incremental backups and all of them seem to either rely on "logical" way of backups/restore ...
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3answers
410 views

Finding differences between a master and slave when pt-table-sync fails

I have a table that's showing some differences on a master and slave according to pt-table-checksum (PTC). I've found some verifying differences beyond that. Certain tables in the mix have composite ...
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1answer
233 views

Database Mirroring and Replication in SQL Server 2008 R2

I have configured the mirroring and replication between 4 servers (A,B,C,D).i.e, Mirroring between A to B and C to D, Replication between A and C. The configuration was a success and I am able test ...
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3answers
421 views

Initializing Transactional Replication From two Different Database Backup

I have two different large Database (200GB for each) which I want to replicate their data to a central database (3rd DB). I followed this link and it was very useful for a single database. But my ...
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9 views

Error while doing in replicaset in windows (mongodb)

I tried doing the replicatset in windows, but im getting the below error. I checked the mongo process and killed the existing process. Even though the error exists. help me on this pls Thx ...
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15 views

How the statement based replication works internal on secondary node of mongodb?

Mongodb supports statement-based-replication. Would like to know, how the statement based replication converts the code internally on secondary node of mongodb. Is that working related to the ...
3
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3answers
179 views

Replication with FileStream

I need to setup database replication (for high availability) on a database that uses FileStream. This is on SQL Server 2012 Standard Edition, so Always On or Peer-to-Peer replication is not an option. ...
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21 views

Is Automatic failover is possible in pgpool?

I have setup the 2 PostgreSQL 9.4 severs with master-slave(Hot standby streaming replication).Is this possible in pgpool-II 3.4 to configure,where it works for automatic failover(network or hardware ...
2
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1answer
29 views

Replicating to Older Versions of MS SQL Server

According to an old MSDN article (from the SQL Server 2008 R2 era), Microsoft SQL Server transactional replication subscribers need to be within two versions of the publisher. Does this hold true for ...
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1answer
25 views

Are CREATE INDEX statements replicated in row-based Mysql Replication?

I've not been able to find a simple explanation of what kinds of statements are or are not replicated from a master db to a slave in MySQL, row-based replication. Specifically I want to add a ...
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1answer
3k views

MySQL 5.1.66 SSL connection error ERROR 2026 (HY000)

UPDATE2 Using WireShark I found out the problem string (I hope I did): 28 | 9.582638 | 192.168.18.128 | 192.168.18.129 | MySQL Response Error 1043 And the error is (according to docs): Error: ...
4
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1answer
838 views

Ports necessary for Oracle 11g Replication across a firewall?

We have two Oracle 11g Enterprise Edition servers that need to replicate data via Oracle streams. However, the two servers are on untrusted domains and connect via a VPN. On end of the connection is ...
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2answers
355 views

Snapshotting Database Tables

I have a reporting database (in SQL Server) that takes nightly snapshots of the production data (Oracle) for users to query against for the next day, but now the requirement is getting to be that they ...
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2answers
3k views

Mongo replicated shard member not able to recover, stuck in STARTUP2 mode

I have following setup for a sharded replica set in Amazon VPC: mongo1: 8G RAM Duo core (Primary) mongo2: 8G RAM Duo core (Secondary) mongo3: 4G RAM (Arbiter) Mongo1 is the primary ...