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 Master/Slave. Actual use of Slave Machine

We have a MySQL server running in a mobile production trailer. The trailer is out on the road for weeks at a time. We have cell internet and wifi access is nearly all of our locations. Our office ...
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28 views

MySQL Master/Slave without populating tables

So I have some Zabbix instances which are using MySQL for their backends. What I would like to do is, for DR purposes, backup the DBs for each instance using a Master/Slave configuration, with the ...
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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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24 views

How to install and configure Postgres-XC in windows?

Can anybody suggest me any resources of the complete installation procedure of postgres-XC in windows. I've installed postgresql-9.2 in my windows and can use it. Now I need to know the installation ...
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24 views

distribution.dbo.MSdistribution_history comments explanation

The comment column of distributor.dbo.MSdistribution_history contains comments such as <stats state="2" fetch="11554" wait="214007" cmds="17898546" callstogetreplcmds="106880"> ...
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mysql replication successful but slave not replicating

I have created a mysql master-slave configuration and things look fine . the " show master status;" on slave doesnt show any error . this is the output Slave_IO_State: Waiting for master to send ...
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1answer
50 views

SQL Server-MySQL master-master replication

We are looking into setting up a master-master replicated MSSQL database and I am interested to hear of any potential pitfalls that we may run into along the way and generally any advice that you ...
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1answer
47 views

Merge Statement + Replication difference for SQL Server 2012

We have a SSIS package that will pull from a source database and run a merge statement to put the data into a "Master" database. (Eventually the "Master" database will be the source of truth, but we ...
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Is it possible to upgrade mongodb cluster without upgrading arbiters?

Is it possible to have running real nodes with version 2.4 and arbiter nodes with 2.0 or 1.8 in the replica set? Upgrade guides for version 2.2 and 2.4, did not tell anything about upgrading ...
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36 views

MySQL Replication and Triggers

I have stumbled upon an interesting MySQL Error message that I do not really know how to interpret. The setup: There are two tables A and B. When data is written or updated in the table A, then a ...
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55 views

Is replication from SQL Server 2008 to PostgreSql possible?

Is it possible ? Sql Server as publisher(master) and PostgreSql as slave(subscriber) ? Any type of replication really.
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Modifying replication distributor & publisher

I have a SQL Server 2008 transactional replication setup as follows: 192.168.100.1 <-- Distributor 192.168.100.2 <-- Publisher 192.168.100.3 <-- Subscriber Our network team want to change ...
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Does MySQL 5.6 support fan-in replication?

I've known for quite awhile that Continuent's Tungsten Replicator supports fan-in replication (example). By fan-in replication I mean combining multiple datasources into a single instance (like a ...
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Oracle to SQL Server DDL replication

We have this customer requirement to do DDL + DML transactional replication from Oracle to SQL Server 2012. The DML part is straightforward. There are multiple options to choose from including the SQL ...
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2answers
56 views

How to avoid lagging when enabling log-slave-updates?

Master: 48GB RAM 16-core my.cnf: https://clbin.com/hlkUo Slave: 64GB RAM 24-core my.cnf: https://clbin.com/viLm0 Both are running 5.5.28. For the incremental backup purpose, I need to enable ...
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28 views

MM Replication and Zabbix in slave, Error code 1032

I have multi-master replication and using Zabbix for server monitoring. Since the replication is row based, I get this error in slave everytime which also breaks my replication. The error I get is: ...
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1answer
119 views

Master updates Slave but not Master itself

I have a setup master/slave in which applications are pointed only to master. Yesterday Master had got crashed due to "multi bit error on dimm detected" in Front indication panel in orange color. ...
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47 views

PostgreSQL: Slave doesn't replicate the Master's data

I'm using PostgreSQL 9.2.3 on both computers, both of which run Win2008R2. I've setup streaming replication by following this guide: ...
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54 views

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

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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3answers
126 views

Transfer 1 million records from one table to another

I want to replicate 1 million rows from table1 to table2. I have written a job with a query like this: delete from table1 OUTPUT *.delete into table2 I am executing this job every one hour, but it ...
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2answers
115 views

MySQL replication: most important config parameters for performance on slave server?

I'm setting up a mysql master-slave configuration, where slave is located on a much weaker sever. Since, if I understand correctly, slave only works on updates/inserts, what are the most critical ...
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2answers
57 views

Is it safe to delete mysql-bin files?

I have MM Replication in mysql, and I want to squeeze some free space in the box be deleting unnecessary files, I came across these mysql-bin files inside /var/db/mysql/ There are hundreds of those ...
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1answer
29 views

mysql replica ignoring server-id [closed]

I've setup a mysql replica slave a couple months ago. After a couple hickups lately, I've decide to restore it from a clean master export. I'm trying to start my mysql instance with this command : ...
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17 views

Can i use XAMMP mysql server with Percona Xtradb cluster?

I just wanted to know if I can use a normal MySQL server (XAMPP) as part of the cluster on my EC2 Server running Percona XtraDB Cluster. Can I just change the my.cnf config file on XAMPP with the ...
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2answers
71 views

Transactional Replication Concerns

We are debating an architecture that employs sql server 2012 and transaction replication. Idea is to offload reporting activity to a secondary server and have the ability to include/exclude what is ...
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21 views

Oracle Downstream Log transfers

I am attempting to create a downstream capture process for two Oracle 11 databases running on Linux servers. The replication will be one-way and asynchronous using archive logs as the transfer ...
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28 views

MySQL replication is not happening when piping sql into mysql client

Today I noticed a very strange issue where if I cat a SQL file and then pipe it to MySQL client, replication doesn't happen. These MySQL statements aren't also written to the binlog. But replication ...
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113 views

Switch MySQL lag slave to new master and keep lagging (5.1)

We have the following scenario: Set of slaves replicate from the master, separate standby master (a.k.a slave with binlogs) replicates from the same master; lag slave, powered by pt-slave-delay, ...
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45 views

SQL Server Replication: “ALTER TABLE ALTER COLUMN” is not propagated to subscribers

We are running SQL Server 2008 R2 SP1 as publisher & distributor, and SQL Server 2005 SP3 as subscriber. The replication of schema changes is activated, and the replication has been running for ...
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47 views

MySQL replication — issue with mysql.proc during replication from 5.0 to 5.5 host

We are replicating from a mysql 5.0.45 host to a 5.5.26 host over WAN. Every once in a while one of our databases does not accept a query and halts the replication. "'Column count of mysql.proc is ...
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71 views

Is there a way to stop MySQL Replication on the master?

I want the master to stop replicating data to the slave. I know I can do that on the slave with STOP SLAVE;, but I wonder if there is a way to do it in the master. One possible solution might be to ...
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2answers
54 views

Loading data in mysql using LOAD DATA INFILE, replication safe?

I am trying to load data into mysql database form CSV file. I found that we could use LOAD DATA INFILE command to do it. But as per the mysql documentation it is not replication safe. (See here) Is ...
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29 views

Pull Subscription: process cannot read file due to OS error 5

I am trying to migrate a working pull subscription for transactional replication from one subscribing server to a new one. The subscribing server is at another site and is connected via a VPN tunnel. ...
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78 views

Single slave - multiple master MySQL replication

I need to replicate different MySQL databases from multiple servers into a single slave server. How can this be done? is there a way to define multiple master hosts?
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21 views

replication breaks after upgrading master

I have a set up of replication with master 5.1.30 and slave 5.5.16 and the replication is working good Now i have upgraded mysql master to 5.1.47 As far as i know we have to turn off the log bin ...
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23 views

How to get replication from a SQL Server mirroring setup 2008 R2

I have a mirroring setup in the UK (principal, mirror,witness) which hosts a number of databases. failover is automatic for individual databases and local client connections are managed using dynamic ...
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1answer
43 views

MySQL replication using a lot of IO

I'm having big troubles on a database pool I've setup recently. There is a master, and 4 slaves replicating one DB. All using MyISAM engine. Thing is, during the replication period (when the slave ...
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44 views

MySQL statement-based replication and stored procedure

When you have a MySQL statement-based replication and you create a stored procedure that modify some rows (INSERT, UPDATE, DELETE commands...), What is really replicated on the slave when you call ...
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37 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
36 views

Syncronize mysql databases between local and hosted servers automatically

We have many website with Development , Staging and Production Server. we have many developers for many projects, we need a solution to synchronize the database with developer database with staging ...
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1answer
45 views

MySQL: replicating to a different table engine type

According to the replication documentation from MySQL, it is possible to set up replication from InnoDB source tables to MyISAM destination tables. Unfortunately, the documentation has little to say ...
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74 views

which sql server edition is good for practice [closed]

Which SQL Server (free/trail) would be good to install, which requires minimum resource and have maximum features. I mean, I can practice mirroring,logshipping and replication. I found this link, but ...
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Streaming Replication Failover - how to point second slave at new master?

I have a Postgres database HA cluster I've set up in a lab. I'm using PgPool-II to manage fail-over. For the cluster itself, I have three identical Postgres 9.2 servers set up like so: Server A - ...
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1answer
35 views

Replication Monitor reports little to no latency, but my tracer token is taking hours to go from Distributor to Subscriber

I sent a tracer token through a replication job that was reporting about 2 seconds of latency about two and a half hours ago. I sent the token through because I noticed a row that was inserted on a ...
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1answer
46 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?Can you help me to make the stored Proc for that?I am new to Replication....Thanks
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19 views

What is the quickest way to recover from an “Incorrect key file for table” replication error?

I'm trying to figure out the quickest way to recover from a replication error. The production site replicates to a DR site. There are two databases at each site. So prod_master replicates to ...
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24 views

Slave lags ONLY when long running sql runs

I have mysql Master/Slave setup. Master in 5.0.77 and Slave in 5.5.28. The Master serves 24/7 with 82.06 inserts/s, 94.39 updates/s, 0.00 deletes/s, 22613.29 reads/s. They both are in sync every ...
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Huge sizes Replication Tables in Sql Server db, how to deal with?

I've a sql server database that is configured to work with old software, i've no details about the software, but i know that DB uses replication. the DB size dramatically increases. When i ...
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77 views

Should I disable triggers, timestamps in a slave in mysql?

We're using MySQL. We have a master that eventually will have 2 slaves. There are triggers in the db that execute when data changes in certain tables. I am wondering whether to disable the triggers in ...
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1answer
29 views

After adding a slave to Master - Master configuration, slave syncs from only one master

Futher to my previous question, Here is what we have +<------+ | ^ V | S1<---M1 M2 | ^ V | +-------+ what happens is Upon ...

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