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: Seconds Behind Master super high

I've set up a slave db server for my production database, but when I checked the show slave status, I noticed a super big number in seconds behind master. This is the output: ...
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1answer
166 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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91 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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16 views

MySQL master/slave replication - replicate all tables

I am doing a master/slave replication, but getting errors about my tables does not exist. Is there not a way where i can make the whole table structure replicate aswell? Thought it did on default tbh. ...
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1answer
45 views

Replication in mysql with many servers

There are 3 shops. In each of these is a mysql server. I want all servers to synchronize their date if at least one server changes the date. I read a bit of literature and realized that I need ...
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1answer
676 views

mongodb replication node stuck at “STARTUP2” with optimeDate as 1970

i have just setup replica sets with three nodes . the third node is stuck at stateStr STARTUP2 with "optimeDate" : ISODate("1970-01-01T00:00:00Z"). However its showing no error message. Is this ...
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2answers
228 views

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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1answer
19 views

MySQL Replication Between Three Hosts?

We have a need to move our Moodle server to a different host, and our current host runs a LAMP stack that likely runs on a VM. It is accessed most of the time. In the event that the current host ...
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1answer
22 views

how to setup [master] - [master-slave] - [slave] mysql replication

i am trying to setup a mysql replication architacture between 3 mysql server. (by following some tuto like ...
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1answer
22 views

MySQL Delete Rows from Slave

I want to truncate the majority of data on a slave such that it only has the most recent records. I'll eventually demote the current master, making it a read-only archive, and promote the truncated ...
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2answers
27 views

sp_publication_validation procedure doesn't seem to work properly

I am trying to use sp_publication_validation stored procedure to validate that my replication setup is working correctly. This procedure is pretty straightforward and is described here. I am running ...
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2answers
2k views

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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1answer
196 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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3answers
95 views

How to remove master role from MySQL server

I have 2 MySQL servers, one is the master and other one is slave, that's all good. The problem I have is that the slave is also set up as a master. I would like to disable or remove the master role ...
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27 views

Replication overview

My boss wants me to elaborate a comprehensive report about synchronisation/replication. I know that replication can be done with the DBMS (we are using SQL Server 2012), but he wants something manual ...
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1answer
15 views

Error 2003: Setting up MySQL Replication

Trying to setup MySQL Replication using this guide here : http://wpguru.co.uk/2013/05/how-to-setup-mysql-masterslave-replication-with-existing-data/ I was able to do this on two random VMs running the ...
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1answer
762 views

Log Reader Agent is not running - The job failed

I created a transactional replication on PRE-PROD (via TSQL) and everything works as expected. On PROD platform replication is not working. While inspecting Replication monitor, I get this error ...
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1answer
193 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
467 views

Which one to use? InnoDB Replication or MySQL Cluster?

I am building a url shortener and I use InnoDB as the storage engine for link data. I will start with a single VPS containing both application instance and MySQL database instance on the same Virtual ...
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2answers
187 views

Upgrading to MySQL 5.6, benefits to switching to GTID replication?

We have the most basic of MySQL replication setups, a single Master doing statement-based replication to a single Slave, a 90/10 mix of innodb/myisam tables. Both run Percona MySQL 5.5 at the moment ...
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0answers
31 views

MySQL replication working, but data is out of date

I'm trying to figure out why even though SHOW SLAVE STATUS isn't reporting any errors, nothing is replicating (see below): both nodes are running: mysql> SELECT VERSION(); +------------+ | ...
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1answer
407 views

SQL Server Troubleshooting Replication and Long-Running fn_dblog query

I am trying to get (pull) Transactional Replication working again for a subscriber. Currently, in Replication Monitor I am seeing messages in the Publisher to Distributor tab and the Distributor to ...
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3answers
42 views

How to auto replicate specific columns only from a table in MySQL

I want to make one master DB which replicates specific user data into other databases such as: username pass (hashed) email pin (hashed) timezone (int) They are all in one table and running on ...
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1answer
22 views

timeline 2 of the primary does not match recovery target timeline 1

I want to create a configuration with postgresql and pgpool to get height availability (HA). I want to do this: .-----. .--------. | | W | DB | | APP ...
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1answer
18 views

Multi Replications Plan on 2 servers

I need some advice about our new database deployment plan. We have 6GB of total mysql data(all innoDB) and innoDB_buffer_pool is set to be 16GB Ans we have 2 database servers.(plus 1 server for the ...
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1answer
50 views

CRC checkup in MongoDB

I am new to MongoDB and currently working on a project. I read tutorials but I'm unable to find any information about Cyclic Redundancy Check (CRC) in MongoDB. Is there any way to check that the data ...
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1answer
85 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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97 views

pt-table-checksum and row-based replication

The set up I work with is MySQL 5.5 in a master-slave replication configuration, but we have to use "MIXED" replication (statement and row-based) because we use an application that requires it, and it ...
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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 ...
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2answers
96 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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1answer
428 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
37 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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1answer
22 views

Synchronize part of the tables to use offline (no internet use) then sync back to server [closed]

I read some synchronization post but seems not suit my case. As I will sometimes go travelling locally and other country which I may have no access to internet then I could not even get the data in my ...
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1answer
59 views

Mongodb replica sets: why does my master server occupy more disk space than my slave?

I have two servers on my replica set. Let's call it the master and the slave, for the purpose of this discussion. The master was the original one, and the slave was replicated from that master. At ...
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1answer
59 views

SQL Server Cross Domain Transcational Replication

Has anyone got any documentation for doing/implementing Cross Domain SQL Server 2012/2008R2/2008 transactional replication document or steps (with screenshot or without screenshot) Thanks for your ...
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1answer
43 views

MySQL Replication - Master Master - Single Master write

I am looking to improve our fault tolerance for our persistent store. After reading several online docs about how to set-up master <> master replication, I'd still like to ask the experts about the ...
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2answers
516 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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1answer
20 views

PostgreSQL synchronous replication time out?

I'm using PostgreSQL 9.3 with synchronous replication. I have 2 synchronous replicators and 1 async replicator. My problem is when 2 synchronous replicators are down, transaction will wait ...
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2answers
901 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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0answers
16 views

Which primary keys must be specified when using slony PostgreSQL replication?

I'm extremely green when it comes to databases, so forgive my ignorance. I've been researching ways to replicate our production Postgres DB, and I've decided to try out Slony. Since the server is ...
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0answers
14 views

Understanding correct procedure to recover master in master-slave replication in PostgreSQL

For learning, I have setup master-slave streaming synchronous replication. Pg-pool 3.3.3 is installed in one VM and it connect to 4 VMs which runs PostgreSQL 9.3, one master and 3 slaves. Replication ...
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1answer
178 views

exception: hosts cannot switch between localhost and hostname

I created a replication set. I added localhost in the set in the beginning, but when I try to edit the member with the actual hostname. I get error "exception: hosts cannot switch between localhost ...
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0answers
19 views

Understanding pg-pool in details

I have following problem regarding the pg-pool (3.3.3) When master fails, automatic failover happens and standby is promoted to master. But this new master don't have any replicators. Other slave ...
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1answer
175 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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1answer
11 views

Does PostgreSQL take time to start streaming replication after restart master?

I set streaming replication in postgresql 9.3. I have one master and 3 slaves and replication works fine. But when i restart the master server and login using postgres database, pg_stat_replication ...
2
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1answer
180 views

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 ...
0
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1answer
25 views

Consistent backup of large DB --single-transaction

I need to mysqldump a large DB (330 GB) in order to set up a slave for replication. Does --single-transaction allow me to dump the entire DB without shutting mysql down and keeping it down for the ...
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1answer
322 views

SQL Server 2005 Replication

I am in the process of creating Replication between 2 Remote Servers, server 1 is the Distributor and Publisher and server 2 is the Subscription. server 1 windows 2003 server 192.168.10.1 connected ...
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1answer
330 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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1answer
28 views

How Much Resources Does the BLACKHOLE Storage Engine Consume?

I'm going to add a MySQL Relay Slave which use BLACKHOLE Storage Engine. The relay slave will just filter some databases binlog to downstream slave. Our MySQL Master generates about 15G a day in ...