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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MySQL: Replication is paused with both threads running, System Lock in ProcessList

I have just set up Master Slave replication from a MariaDB EC2 instance to a MySQL RDS instance. What can I do? The Seconds_Behind_Master are increasing, never decreasing. Slave_IO_State Waiting ...
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276 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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58 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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44 views

Where to look for Agent history in Replication?

In SQL server 2008R2 replication configuration, "agent history cleanup distribution" job by default runs every 10 minutes and deletes any historical data older the 48hrs. If I increase the retention ...
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5k views

Shell Script / Tool to check the MySQL Replication Status? [duplicate]

Possible Duplicate: Monitoring replication on mysql I am running with MySQL Master/Slave Replication on Linux. Is there any tool/Shell script which monitors the Replication Status and send ...
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153 views

Postgres 9.4, replication slots, doesn't work failover master

I've installed postgres master and slave nodes by this manual: At the master (10.0.0.1): sudo -u postgres initdb -D /data/postgres/main Change postgresql.conf: listen_addresses = '*' wal_level = ...
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26 views

How to force a delayed member to become primary in case of failure in mongodb

I have three member set [primary,secondary & arbiter] in my data center 1 [DC1]. Now i want a delayed member in data center 2 [DR]. In case DC 1 is completely down then my sub net application ...
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10 views

After merge replication setup, tables at subscriber not getting any data from publisher

I have created a merge replication setup through Replication Wizard. After sync, it is observed that the subscriber DB gets created with the exact tables in publisher as intended, but on the ...
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69 views

sql server transactional - replication - the internal procedures often deadlock with user processes

Very often I have deadlocks on my subscription server, involving the replication internal stored procedures and user processes either ad hoc or procedure queries. For example: Deadlock of the ...
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1answer
47 views

Replication Configuration

I had a SQL Server 2008 Express edition as a Default instance and I am having SQL Server 2012 Evolution and SQL Server 2014 Evolution are my named instances. When I was trying to configure ...
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47 views

How to troubleshoot, find and fix query Percona 5.6 with error “SQLSTATE[HY000]: General error: 1785 When @@GLOBAL.ENFORCE_GTID_CONSISTENCY = 1”

i'm running Magento CMS, and underneath there are 2 physical servers both with Percona Server version: 5.6.23-72.1-log Percona Server (GPL), Release 72.1, Revision 0503478 in Master/Slave ...
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104 views

MySQL 5.6 Slaves Fail to Reconnect to older MySQL server when it goes down for backups

I have an existing replication setup with Masters and Slaves running MySQL 5.0. A long existing script runs at night which restarts MySQL on the master with skip-networking, runs a backup, and then ...
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14k views

Broken mysql replication on slave server (error 1236)

My question is: how to fix broken mysql replication on slave server (error 1236)? server 1 (192.168.1.105) server 2 (192.168.1.106) I ran these steps to re-sync: At the master - server 1 ...
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2answers
71 views

migrate db's - best way to mirror or replicate a full database

I would like to mirror/replicate my databases to the cloud. The cloud is setup using VPN to my actual machine. I am a bit confused by the options I have and would like to get some light into it. My ...
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87 views

Warm Standby PostgreSQL 9.4 error; FATAL: the database system is starting up [closed]

I want to setup a Master and a warm standby, so far here's what I have setup: Master postgresql.conf listen_addresses = '*' wal_level = archive archive_mode = on archive_command = 'copy "%p" ...
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45 views

Converting MySQL master-master replication to master-standby

I set up two mysql servers in a master-master configuration. This was working fine until recently when I encountered a duplicate-key problem. After doing some research and evaluating my needs, I ...
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1answer
90 views

Can SQL Server replication be used for Point-of-Sale (POS)?

We are looking for a solution that will synchronize the databases of our POS. The scenario says we have 3 POS with SQL Server Express installed on each machine. We want these databases to be in-sync ...
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2k views

Cannot get my slave - replication server to start

My replication server will not start. I have followed the instructions here: http://opensourcedbms.com/dbms/setup-replication-with-postgres-9-2-on-centos-6redhat-el6fedora/ As well as several other ...
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1answer
79 views

“Oneway” Replication from Oracle DB to TimesTen

currently I'm really stuck into a problem and I not able to finde a nice way to realize that. I need a suggestion to replicate from oracle db (some tables) to a TimesTen. A connection is only ...
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2answers
4k views

Get the list of all Tables, Views, Stored procedures that are not added in a publication for replication

How do I get the list of all Tables, Views, Stored procedures that are NOT added in a publication for replication?
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1answer
175 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. ...
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74 views

Having DB Mirroring and Replication together

Can anybody help me understand why do one go combination of Database Mirroring + Replication. Why can't I just have Database mirroring for high availability of my database. What is the need of ...
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16 views

Is there Merge and Snapshot replication methods for MySQL?

In distributed database systems, is Merge and Snapshot replication supported in MySQL? I am thinking of something similar to MS SQL's types of replication: ...
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221 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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62 views

Secondary replica indexing

I have a question, about a question, that is part of the 70-462 Microsoft exam. I had this question today, and I'm not completely sure of the correct answer. While I did pass the exam, I would like ...
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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 ...
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33 views

On triggers and replication in MySQL

I have a classical statement-based replication between the master and the slave. Triggers were created on the master and replicated on the slave as well. Assuming that I have, say an ON UPDATE ...
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274 views

mysql replication master 5.5 slave 5.1 error on create database

I have a replication system where my master has a mysql 5.5 version while the slave is mysql 5.1. I know that this is not supported because the slave version should be greater than the master, but we ...
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40 views

Best method to implement HA and DR, replication via 1 PUB and 2 SUB or replication and LS both

I need a advise on one of our projects where: We have 3 SQL database servers A, B and C: A is the live production server with around 200 users with a database of size 1.5 TB hosted. B is going to ...
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30 views

Replicate SQL Server tables between AWS RDS instances

We are running an RDS instance in AU region and would like to replicate some tables to RDS instances in other regions. A lag of a few hours is acceptable between master and slaves. As we're on RDS ...
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1answer
145 views

Transactional replication between SQL Server 2014 (Publisher) and SQL Server 2012 (subscriber)

We need to set up transactional replication between two servers A and B, configs listed below: Server A (Publisher) Microsoft SQL Server 2014 - 12.0.2254.0 (X64) Enterprise Edition (64-bit) ...
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1k 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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66 views

Maintaining permissions on a replicated view after reinitialization

When we were on SQL Server 2005, there was some way that I was able to keep custom permissions on a view at the subscriber. Now that I'm on SQL Server 2012, there doesn't seem to be a way to do ...
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98 views

Postgres Streaming Replication: How to re-sync data in master (with standby) after failover

I am absolutely new to postgres 9.1 replication mechanisms. I have managed to set up streaming replication between a master and standby postgres (Both have x number of records). At one point when ...
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118 views

Transactional Replication in SQL server 2014

We need to set up transactional replication in SQL server 2014, Enterprise edition so that: Database to be replicated from Publisher which is approximately 2 TB in size. This would be used 24*6. Here ...
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25 views

Transactional replication of stored proc execution and stored proc parameters

I'm trying to design how we might go about setting up replication of just the execution of a stored procedure. If the stored procedure on the source takes one or more parameters, will those same ...
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56 views

Can SQL Server Transactional Replication do this?

We have a production server and a reporting server, with transactional replication in place to move all inserts/updates/deletes from production to reporting. We're using SQL Server 2008 R2. We have ...
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12k views

Add article to transactional publication without generating new snapshot

Using SQL 2008 R2 transactional replication with pull subscribers, when we add an article, I'd like to avoid having to create an entire snapshot (the db is ~80 GB, so this takes hours). From this ...
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46 views

MongoDb replica set: How do I verify data replication on other servers?

I have a 3 member replica set running. It's geo-located on 3 separate VPSs. On primary I can do rs.status() and see it's working. I can't execute any mongo shell commands on the secondaries. How do I ...
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42 views

SQL Server 2008 R2 Replication not working - my 1st try

I am having difficulties when I attempt my first shot at SQL Server 2008 R2 Replication. Looks like I have login issues. How do you modify settings without having to start a new plan again? Please be ...
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308 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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24 views

lot of relay log formation in mysql5.6

Reason for lot of small relay log file formation. I Have setup a slave and it relay log rotates to soon and creates thousands of relay log file.whats the reason for more relay log formation.
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30 views

How to manually invalidate a pull merge replication snapshot from the publisher

XY Problem background info: I have a pull replication publisher in which I want to add or alter a index and have those changes be applied to the subscriber. The solution to that problem I would like ...
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27 views

Heroku Postgres Follower

I'm currently looking at creating a follower db of a live production database. The follower will be used for analytics purposes only. And will not be inserting any data - if it did then it would be by ...
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85 views

Mongodb replica set across AWS regions or subnets or data centers

I seem to have run into a blocking problem. I want a certain collection to be replicated across multiple AWS regions/subnets/data centers (eg a global lookup table or a global user credentials table) ...
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2answers
67 views

What are some known hazards with cyclical replication between two MySQL master servers?

If I were to set up cyclical replication between a MySQL 5.6 master server and a MySQL 5.1 master server, what are some things that could potentially go wrong? Also, the 5.6 MySQL does not have GTID ...
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48 views

Write-lock a whole table during transaction

I need to perform a delicate operation to my table in which I will solely insert, delete and select upon all of my rows and no God may interfere with the table during this operation: the table will be ...
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34 views

MySQL GTID replication: is it possible to make DDL changes to a slave and then catch it up to a master?

Here's what I would like to do: 1. hang a slave off my production master. 2. stop replication 3. adjust some data types and create some indexes on the slave (no data mods) 4. restart replication 5. ...
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140 views

Fan-In replication 4 Master -> 1 slave

I am trying to merge 4 source db's (one for each region) into a global db. We use ID ranges as primary key on the tables in each region and so the merge should happen nicely. I have a fairly high ...
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42 views

Duplicate delete query in binary log of MySql Master

We are facing strange problem, while replication data from master to slave. Same data is being deleted twice in log(How ever only one row is deleted and one time),due to which we are getting error ...