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 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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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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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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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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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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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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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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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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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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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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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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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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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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824 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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512 views

Syncronize mysql databases between local and hosted servers automatically

We have many websites with Development, Staging and Production servers. We have many developers for many projects. We need a solution to synchronize the developer and staging databases. After that one ...
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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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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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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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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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Huge sizes Replication Tables in Sql Server db, how to deal with? [closed]

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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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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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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Adding slave to existing master-master config in mysql throws Foreign key constraint failed error

We have two mysql servers running in master - master configuration. Now we have to add a slave to the existing configuration. But upon adding the third DB server and starting slave on it, it throws ...
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216 views

Write performance of Postgresql 9.1 with read-only slave

I have a Postgresql 9.1 database that is being hosted by Heroku. It currently has a read-only "follower". I need to truncate several large tables (over 100GB) of data and reloads them. Is the read-...
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Circular replication with servers in different locations

My service runs on single machine, and database (mysql 5.1.66) is replicated to 2 other identical slaves (with lesser system resources, mysql 5.1.66) via chained replication. Machines are located in ...
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How to have MySQL Slave Replicate From a Master's Master

We are using the Following: MySQL 5.1.63-community-log MySQL Community Server (GPL) OS : Red Hat Enterprise Linux Server release 5.4 We have three servers and all servers are enabled with binary ...
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Bandwidth comparison between log shipping and transactional replication

Which technique uses more network bandwidth: Log shipping Transactional Replication Can some one share any benchmarks for the same ? What would be the Memory and I/O impact on the Primary server ...
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203 views

How to reinsert corrected rows from the conflict table?

I have a bidirectional merge replication. I had failure constraints because the primary key was just integer. I change the primary key to the old primary key + a location identifier.The problem is how ...
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Will deleting data in master automatically delete data in slave?

I have data replication setup on MySQL. If I delete data on the master, will replication know data was deleted and automatically delete the same data on slave?
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Can I use replication/mirroring to have a “Current” database and a “Full History” copy?

I have a database that is used for current operations. The amount of data is starting to get a bit to much for the applications using it. Most of the data is older and is very rarely needed. I am ...
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MySQL slave stuck in “Reading event from the relay log”?

5.5.28-log MySQL Community Server (GPL) by Remi binlog-format=MIXED My problem is similar to this question. *************************** 2. row *************************** Id: 973415 User: ...
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Bi-directional replication for the same MySQL table

AppA stores/retrieves data from dbA.tableA AppB stores/retrieves data from dbB.tableA tableA definition is the same across these databases. To start with dbB.tableA was copied from dbA.tableA (...
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mysql second slave not syncing while first slave works fine

I have a master (m) - slave (s1) setup using mysql 5.1.45 When I try to add a second slave (s2) the slave lags behind and never catches up on the sync. Even after having synced the s2 with the whole ...
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Advise On SQL Server Data Replication

We have a huge enterprise system, with geographically seperated SQL servers. We have some requirements related with data replication between these servers. We have considered the Sync Framework ...
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Do I need client certs for mysql ssl replication?

I'm setting up mysql replication using SSL, and have found two different guides. The first one creates both client and server certs, while the second one only creates server certs. I don't know ...
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Is it possible to have extra tables in a Slave with MySQL Replication

As my title mention I have a Master and a Slave database. Master if for operations data and my slave mainly for reporting stuff. The issue is that I need to create extra tables on reporting that can'...
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Replicating databases for local and cloud instances

Forgive me if this is an inappropriate place for this architectural question but I'm not sure where it best fits in the StackExchange family. I have been tasked with developing an online/live auction ...
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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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461 views

MySQL Slave Lagging Almost Daily -Ver 5.5.17 ( Master & Slave )

I am observing this lag in a continuous manner. Investigating in the bin log events, i found the following information. Slave executing the relay Logs slowly. 1. Changing the Innodb File Format ...
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Does MySQL Replication hamper the performance of my DB?

I am not exactly a 'Qualified' DBA, but yes i am in charge of my own DB which we use in our social app. I have recently implemented Master/Slave Replication on my Database for obvious reasons. What ...
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Replication on MySQL server

I had to stop the slave server to test something. After I started the server again there is a problem with replication on MySQL server On the problematic server mysql> SHOW SLAVE STATUS\G ********...
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807 views

MySQL monitor prompt does not return for slave

I'm trying to fix a replication error (or an ongoing failure to replicate) between our master and slave MySQL databases. The procedure I have asks me to use MySQL Monitor to stop the slave. stop ...
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How can I replicate some tables without transferring the entire log?

I have a mysql database that contains some tables with private information, and some tables with public information. I would like to replicate only the tables containing public information from one ...
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What type of SQL Server Replication fits our scenario? Merge or Transactional?

Background In our current setup, we have a single SQL Server 2005 instance on our remotely hosted web server. We additionally have another (non-MSSQL) database which we use for our POS system, which ...
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MySQL Slaves lag behind master

I have one master and four slaves. Sometimes all my slaves lag behind the master. I have implemented the heartbeat for monitoring replication lag. Now I am trying to find why the slaves are lagging ...
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MySQL replication between VPS and shared host

I have a VPS where I have ssh access and shared host with CPanel. Both have MySQL. I need to create a master/slave setup among the two server. As per this tutorial: How To Set Up Database Replication ...
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Slave SQL thread got hanged

We have a master - slave setup with ROW based replication. We are seeing huge delay's on the salve even though there is no activity running wither on master or slave. When we looked in, we observed ...
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Best way to perform SQL Server replication over multiple servers?

My current setup requires me to use three separate SQL Server 2012 instances (installed on 3 separate machines, separated geographically) and have the data be replicated across all 3. Any changes made ...
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Conflict handling, SQL Server 2008 R2 Peer to Peer

I have a Peer to Peer replication topology set up between two SQL Server 2008 R2 servers. I was doing some testing on fault tolerance and conflict handling. I have conflict detection enabled, and ...