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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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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77 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 ...
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261 views

Log file growth due to replication issue

I have one primary database and it's getting replicated to another server. Both servers are SQL Server 2008 R2 with SP1. Replication was running fine till last week. We have transaction log backup ...
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153 views

How to upgrade MySQL 5.0 to 5.5 with master-master replication?

I have to update 2 hosts with SUSE Linux Enterprise 11 from SP2 to SP3 which implies an update from MySQL 5.0.94 to 5.5.31. The release notes state: SLE 11 SP3 introduces the upgrade of the MySQL ...
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sp_spaceused and replication question

I have been replicating data from a table to 2 different locations and was just looking at sp_spaceused to see the size of the tables. I have noticed that the replicated tables are smaller than the ...
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105 views

Row not being deleted from the publication when it's deleted in a subscription

We've merge replication configured in our environment(1 Publisher, 3 Subscribers) and We know by default merge replication is bi-directional. Its working fine in case of inserts i.e, if a row is ...
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95 views

MySQL Replication fails - commands received in wrong order?

The other day, I had this issue with one of our MySQL 5.1.60 master and 5.1.61 slave setups: Last_Error: Error 'Can't create table 'foobar.#sql-4b87_2' (errno: 150)' on query. Default database: ...
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398 views

Transactional Replication Failing Suddenly - Distributor Error

I have two databases (both SQL Server 2008 R2) taking part in transactional replication. This exists to pass data to a customer of ours, so I am troubleshooting from the Publisher side. Replication ...
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MySQL Master-Master Replication Table Row COUNT() Inconsistency

I have two MySQL servers replicating to each other in a Master-Master typology. This has been working fine for several months now. Recently I've noticed some drift in one Master. There is a row ...
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497 views

SELECT + INSERT + Query Cache = MySQL lock up

MySQL server seems to constantly lock up and stop responding on certain types of queries and eventually (after couple of minutes of not responding) give up with an error "MySQL server has gone away", ...
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373 views

Merge Replication Update Statement Timeout

I work for a company that provides web based data collection. Currently we have a SQL Server 2012 server as the publisher for 2 subscribers (planning on expanding up to 5+ subscribers), both SQL 2012 ...
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334 views

MySQL replication error 1146

Any idea why there is '1146 - table doesn't exists' on 'CREATE TABLE IF NOT EXISTS...' statement. It actually happened only on one of the slaves (there are two in total): Last_SQL_Error: Error 'Table ...
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Setting up replication alerts

I 'm trying to configure alerts for replication. Currently on my test setup I run everything under user 'sa'. When I try to set up alert for agent failure I get the following error Login failed for ...
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How to use a database across two availability zones

I have servers in the USA and Japan for my website. At the moment they are both connecting to a MySQL server in the USA, which is obviously perfect for my local USA clients but quite slow for my ...
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256 views

How to switch Quiescing to Normal Mode in Oracle?

I have two instance database Oracle, they are ORCL11 and ORCL10,.... I've configured them, it looks like correct. Then, I connect to replication user admin ORCL10 conn repadmin/repadmin@orcl10 And ...
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129 views

Any solution to fix circular replication fail-over?

I've developed a point-of-sale system for our corporation, which has 25+ branches across the country. Each branch has its own MySQL POS database on a WAMP server. I want every event that occurs in ...
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163 views

innobackupex: What causes Slave_open_temp_tables did not become zero after waiting 15 minutes?

As you might know, in order to assure a consistent replication state, the slave should be backup only when there are no open temporary tables: ...
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244 views

How to delete orphaned records from sysmergesubscriptions table?

I have some old orphaned records for old subscriptions that I want to delete from the sysmergesubscriptions table. Each time I delete unnecessary records, it show up again after it syncs with any ...
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365 views

How to sync mysql remote database daily ?

I have a database that contains orders , products ..etc. I have another system that generates reports based on this database. Due to heavy load i want to separate those systems Where i have the master ...
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271 views

MySQL 5.1.67 - Replication failure Mysql, Master Log Truncated or corrupted

I have run into some issues with replication After an in-place upgrade of mySQL from 5.0.77 -> 5.1.67 rel 14.4 Percona replication between a master and multiple slaves is causing issues. slaves are ...
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155 views

Replication issue - CREATE SELECT alternative?

I've an MySQL 5.1 slave for our BI team. They need to make some CREATE SELECT with big select queries (several million lines). As CREATE SELECT is a DDL, if the replication attempts to update some ...
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477 views

Transactional Replication Over Domain

I am trying to setup transactional replication in SQL Server 2008 R2 on two servers on separate domains. I am able to create the distributor, create the publication, and create the subscription, ...
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pt-table-checksum generates no output

I've been using pt-table-checksum on our staging server successfully, but when I run ./pt-table-checksum h=localhost,u=user --ask-pass --lock-wait-time=50 --databases prod It just sits there. No ...
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51 views

Merge Replication Finding Session Id

I am using merge replication with SQL 2012. I am writing a custom business logic handler, and would like to know if there is a way to get a session id? For instance if the custom business logic ...
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MySQL replication backup

How to take MySQL Master-Master and Master-Slave replication backup?. I have setup Master-Master replication with a separate slave for each master on Ubuntu. What happens if, I issue or schedule ...
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In MySQL 5.6, schema changes in master blocks the slave?

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

SQLAnywhere: Real time databases replication, to prevent downtime by crash of machine server

I'm looking for options to prevent downtime of SQL Anywhere server, in case of failure of machine server. Is there solution, that will allow us in real time, to switch to different server? I mean, ...
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13 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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20 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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24 views

MySQL Master-Master-Slave failover

I have setup a Master-Master configuration in MySQL with one additional slave, like this: Master1 <-> Master2 <- Slave Master1 is the write master used by my application, Master2 is used ...
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8 views

SQL Server 2008 R2 - Replication - Multiple Publications on a single database

I have hit a problem and I need an idea of where to look or how to resolve. I have setup a publication and 2 subscriptions to it, 1 running on a schedule and the other running continuously. I need ...
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22 views

Checking for replication options

I have a master/master setup with one DB in each. DB name and tables in one server are different from the other, and few 'user' tables are being replicated with the option replicate-do-table. (It's ...
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Data on the slave becomes inconsistent after couple of days

We are planning on upgrading our production MySQL server from MySQL 5.0.77 to Percona 5.6.19-67.0. Since our downtime window is small, we setup a slave of the production master on a new host and ...
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Differing AUTO_INCREMENT values between 5.1 vs 5.6 slaves

I have a MySQL 5.6.21 slave and a MySQL 5.1.73 slave that are both replicating from the same MySQL 5.1.73 master. I noticed that for several of the tables ( I said several because when I try to rerun ...
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sql server snapshot replication compatibility issue

I have 2 SQL Server 2008 R2 and I am trying to set up Snapshot Replication over the Internet. I have successfully managed to get the subscriber to connect, but now as the Job executes on the ...
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24 views

Amazon RDS replication with external slave

I've recently configured a replication with an external MySQL master and RDS as slave but now I need to reverse that config and use RDS as master and the other instance as slave. Actually I use a vpn ...
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28 views

Last synchronization time between master and slave (replication)

During replication process where a Master is connected with slave. Some times connection between these two goes down. Any options to get the details of the last synchronization time?
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30 views

Creating SSL certificates for a MongoDB replication set

So I figured out my issues regarding connecting a node to a node or a client to a node in my replication set and now I'm trying to figure out how to bring this together so that all of my nodes can ...
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MySQL Master Slave replication seems to affect whole solution

We are running 2 master slave pairs on a web application MySQL 5.1. The concept is to keep all data in sync so that we can via a config file point all customers at one master slave pair to do ...
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35 views

SQL Server Replication (Login failed for user 'NT Service\SQLAgent$SQL2014')

I'm trying to setup a replication on my local computer. I setup the distributor, the publisher and the subscriber. When I launch replication monitor on the publisher instance it returns the ...
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29 views

Bucardo doesn't do fullsync

I have a 2 computers, one of them called master, and the other called slave both using PostgreSQL 9.3.5, but has different OS (32-bit and 64-bit) I have installed and setup the bucardo on the server ...
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58 views

MySQL Binlog Dump process stops after net_write_timeout

We have 2 MySQL 5.6.19-1 servers with master-master replication that were working fine (DB01 and DB02). One of them was rebooted unexpectedly (DB01) and seemed to be working fine, but we saw that the ...
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mysql replication error 1236 need to restart replication process

I'm using mysql replication and the slave/master crashed in the process and then I got: Got fatal error 1236 from master when reading data from binary log: 'Could not find first log file name in ...
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118 views

MySQL 5.6: explicit_defaults_for_timestamp

I have the following replication topology: DB1 (MySQL 5.5) -> DB2 (MySQL 5.6, explicit_defaults_for_timestamp = 1) -> DB3 (MySQL 5.6, explicit_defaults_for_timestamp = 1) - "date" field: ...
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147 views

“ORA-00936: missing expression” setting up Oracle Publisher in SQL Server

I'm trying to set up an Oracle publisher in SQL Server so I can perform replication. I've gotten connected to Oracle, the drivers work great (I have other linked servers), I can select an article I ...
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13 views

MariaDB replicate views

I have a database in MariaDB from which I wan't to provide information from some of it's tables (for example, from the users table I don't wan't to showpassword, and also skip some users, like admin) ...
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91 views

How to split task (read and write) between two mysql server via HAproxy load balancing?

I have done some test and setup two (A and B) different database server from the following link - https://www.digitalocean.com/community/tutorials/how-to-use-haproxy-to-set-up-mysql-load-balancing--3 ...
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MySQL Replication problem with VIEWS and “Sub-Databases”

I've got three servers that should do a master-master replication. On server 1 i got "01_maindb" which holds the master tables. I replicate this table to the two other servers without problems. ...
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why is latency growing

I have a 4.4TB database that I've been transactionally replicating to 2 different subscribers just fine. Yesterday I added a 3rd subscriber that is all flash drives to test how much better it will be ...