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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off-site Dataguard replication status check

Kindly assist with step by step approach for monitoring replication status from our Primary to Secondary Data Center. A short script or command that can accomplish this task will be appreciated, ...
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7 views

Mongo Memory mapping file size issue

I am witnessing some performance issues in my Mongo Sharded cluster. I checked the serverStatus for the memory uses on my shards This is the output Shard one Primary RAM size 512 GB "mem" : { ...
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9 views

Mysql Master-Slave replication catchup and bin_logs

I have set up MYSql Replication using 2x 128gig ram 24 core cloud servers. we have a massive live database that cannot experience down time due to the high volume of data input. I have found while ...
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11 views

Did this trigger break replication?

I added a trigger to a replicated database. DELIMITER $$ USE `database`$$ DROP TRIGGER /*!50032 IF EXISTS */ `some_ins_after`$$ CREATE /*!50017 DEFINER = 'user'@'%' */ TRIGGER ...
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1answer
11 views

Setup MongoDB replica servers with different power?

Is it a good practice to setup replicas with the same machine size (wrt. CPUs, RAM, Bandwidth, etc.) or can replicas be based on smaller machines? One usecase might be to have a small non-voting ...
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22 views

Replication Strategy for Multi-Office Database

I'm considering options for setting up a repository of large spatial datasets that can be used by employees across our company. We have offices scattered around the US. Our employees utilize ...
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21 views

choosing between the slaves on streaming replication

We are building a new streaming replication setup on postgres 9.3 integrated with pgpool for load balancing and failover, and repmgr for replication business. We have seperate daemons running on all ...
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24 views

What exactly should I backup in MongoDB when using replica sets?

I have several instances of MongoDB replica set servers with a primary and a failover machine for each replica set. The primary machine makes daily backups by creating an LVM snapshot and copying all ...
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1answer
11 views

MySQL - Migrating from Master-Slave replication to Master-Master

We currently run 2 large mysql master-slave replication trees. Each tree is built with one master, several 'middle' slaves replicating from the master, and 'end' slaves replicating from the 'middle' ...
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8 views

MySQL replication error when an event is expired and dropped automatically

I have an event that ends at 2014-01-21 10:00:00, and a replication error was caused by drop event *** statement, coz the slave complains that the event does not exist at all. A little bit more ...
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1answer
7 views

Mysql 1 way replication master lost data replication still has

Had a master mysql on (windows) improper shutdown. Many records could not be recovered and investigation found slave had records master did not have. Did not restore over master - left as was. As if ...
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1answer
36 views

Distributor latency - slow sp_MSget_repl_commands performance

One of our publishers is subscribed to by three subscribers, each subscriber is hosted on its own physical server. Two of those subscribers are 2008R2 and the third 2012. The 2012 subscriber is ...
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1answer
79 views

table partition in order to solve frequent deadlock issues - how would I know if it will work?

I use sql server 2005 enterprise edition and have a subscriber DB - part of a transactional replication - that is used for Business Intelligence purposes - they run reports out of it, and SSIS ...
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1answer
50 views

“Uninitialized subscription” on replication monitor when creating a subscription on transactional replication

we have the same question here. However, that does not answer my question below. I'm using SQL Server 2012 and trying to implement transactional replication. I'm using the system stored procedures to ...
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1answer
81 views

PostgreSQL SELECTs not returning correct result following recovery?

I took a copy of the current database from a live slave using pg_basebackup and recovered it to a brand new isolated computer following the instructions in the docs. Once the new database had started ...
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1answer
20 views

Initialize replication from multiple split backup files

We are creating a new Node within our existing P2P replication setup. To be able to create the backup and copy the files I am Backing up to 9 files - each will be about 72Gb: e.g. BACKUP DATABASE ...
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1answer
55 views

Replication Monitor Information using T-SQL

The image below shows a transaction replication problem that I am currently investigating. The image comes from the Replication Monitor. How can I get this information using T-SQL?
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30 views

Mongodb replication behind a gateway

I have a replicaset with 3 servers and I need to move two if them behind a gateway. The final setup would look something like this, Server 1 (PRIMARY) ________ | S | _____________ | _ _ _ _ _ _ _ ...
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Transfer Data between 2 organizational domain

Please consider the following scenario: Company A manages the IT Infrastructure of Company B. Company A is located in US and has SQL Server 2014 Enterprise Edition. Company B is located in UK and has ...
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1answer
30 views

Is it possble to replicate MySQL server on Azure virtual machines

I have two Windows Server 2012 R2 virtual machines on Azure. I need to replicate the database on each of the windows servers. I have followed this link but I am not getting the connection between the ...
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36 views

Saving replication latency for monitoring purposes

I have SQL Server 2012 Enterprise edition, transactional replication. many servers, many DBs. This morning I come to the office and been told the latency on some databases was about 30 min behind. I ...
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36 views

Replication monitoring refresher for distribution job affecting performance

I have a performance problem due to a sql agent job executing dbo.sp_replmonitorrefreshjob. The environment is a 2 node Cluster with SQL Server 2005 SP2 and with transaction replication. The OS ...
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50 views

SQL Server transaction replication agent error

We are running transaction replication on SQL Server 2008 R2 SP3. Distribution agents are reporting : "Agent is retrying after an error. 3 retries attempted" every 10 minutes. Tried changing ...
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28 views

Replication / Bulk Update between Servers

I'm looking to update several tables between two servers daily to have a replica of the data available. My question is, what is the least resource heavy and most effective method to implement this? ...
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1answer
39 views

Mysql Percona 5.6 slave lags gradually

I have got into slave lag gradually say every minute it lags around 5secs on slave. So it started morning 10AM the Seconds_behind_master was 13. Now at 4:30 PM it has reached to 560. No variable ...
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3answers
58 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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1answer
36 views

MySQL replication slave of slave not receiving updates

I have 4 servers: A, B, C and D. A and B are in a master-master setup. C is a slave to B and D is a slave to C. Changes on A or B get to all nodes other than D. I need them to get to D Changes ...
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33 views

Why database replication fails when database mirroring is broken?

I'm trying to understand what effect database mirroring can have on replication in SQL Server 2008. Here is current environment: (don't ask me why it was done this way or to change it) Server A: SQL ...
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1answer
31 views

Sql Server 2008r2 Replication Snapshot Agent Hang

I am setting up a new merge publication, but I can not get the snapshot agent to run successfully. In fact, I can not run any snapshot agents for any of the other publications on this server now. ...
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1answer
26 views

Mysql replication problem after export/import on already working replication

I have 2 databases in master - slave replication. I had some errors in the replication due to inserts in the slave, so I corrected it and executed: stop slave; set global sql_slave_skip_counter=2; ...
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13 views

Error “Slony-I creation script not avilable ; only joining possible” in SlonyI replication using pgadmin3

I am facing the above issue while Creating a base replication objects like database etc.. As a workaround i have done the changes like editing the options of Binary Paths in Pgadmin Console but no use ...
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1answer
44 views

Upgrading mysql percona server from 5.5.40 to 5.6.71

2014-12-26 05:18:20 13215 [ERROR] Native table 'performance_schema'.'events_waits_summary_by_user_by_event_name' has the wrong structure 2014-12-26 05:18:20 13215 [ERROR] Native table ...
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1answer
24 views

MySQL replicated tables for Cognos BI

the Business Intelligence guy is asking for faster machines, latest software etc. and some of his customers are complaining of query times in excess of an hour. The tool is Cognos/Insight and the DB ...
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1answer
52 views

Mysql binlogs exists, show binary logs is empty

I am working on a replication setup and have turned on bin-logs. I have moved my mysql datadir to a new location as well as the binlog path From my.cnf datadir = /vol/data/mysql ...
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1answer
25 views

SQL Server 2008 R2 - Change distributor schedule

We have configured SQL 2008 R2 replication. Distributor is configured in continuous mode, publisher is scheduler is set to execute after every six hours. Now we want to change distributor schedule ...
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1answer
51 views

Transactional Replication - Replication Order of Related Tables

** This was previously asked on Stackoverflow - I removed it from there and recreated here ** I have an issue with SQL Server Transactional Replication. My topology is as follows (and this cannot be ...
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1answer
39 views

How to restart the distributor agent of transactional replication?

After troubleshooting query time out error I would like to restart my distributor agent. So I go to my distributor server, in my distributor DB (called distribution_SA) I run the following query: ...
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1answer
19 views

Mysql Master-Master Replication Error

Configured Master-Master Replication But both servers slave shows the below error !! Last_IO_Errno: 1236 Last_IO_Error: Got fatal error 1236 from master when reading data from binary log: ...
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28 views

What should be the ideal network configuration for a Postgresql Streanming Replication and PgPool HA setup

I have the following configuration using Pgpool, Postgresql with streaming replication. Pgpool is used for load balancing and automatic failover. .-----. .--------. | | ...
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1answer
109 views

The process is running and is waiting for a response from the server - transactional replication

I could not yet figure it out why one of my transaction replication subscription is constantly coming out with the following annoying message: The process is running and is waiting for a response ...
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20 views

Mysql Master - Master Replication

i have established a master A and master B replication between two servers.Both are getting replicated.But it is limited with only one database. My questions 1.How to create a new database in ...
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1answer
32 views

Is it possible: MySQL semisync and async replication on same master-slave pair?

I want to use master-slave MySQL (or MariaDB) replication to remote server as data protection from hardware failures. I have two goals: to keep low response time and don't lose important data. Good ...
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18 views

MySQL multi masters with replicas

Currently I have a Master-Master setup, however there is a need to create replicas servers in geographical areas. I am trying to figure out the best method to handle this. The kicker is not all ...
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1answer
30 views

MySQL slave replication permission error

I am having a rather frustrating issue. I have granted replication client to a user on the slave instance of MySQL. I can login using the username and password. I can exectute "SHOW SLAVE STATUS;" but ...
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1answer
68 views

3 Node Replica Set all became SECONDARY

my 3 set replica set all became secondary and I'm not sure why. db1 2014-12-12T02:43:55.067+0000 [conn1413096] end connection 10.0.64.12:58483 (512 connections now open) 2014-12-12T02:43:55.067+0000 ...
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1answer
17 views

MYSQL binary log file not capturing in slave machine

mysql binary log files are not getting captured in slave machine, its available in master machine. When i check the binary log files its of size 1kb without any data in slave.
2
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1answer
24 views

MySQL replication for non-standard port (3306)

I want to do MySQL replication using MySQL 5.6.14 under MS Windows 2008 R2, the port for Master and Slave should be 1000 (master database on PC1, slave database installed on PC2 I added the following ...
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1answer
30 views

The message “Running the Merge Agent process would exceed the maximum number of processes allowed” appears, but it doesn't seem likely

The full text of the message is "Running the Merge Agent process at this time would exceed the maximum number of processes allowed by this publication. The process will run when resources become ...
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Backing up AWS database to an on premise server

I have 2 questions - 1) Are there tools, AWS provided or otherwise, which can continuously backup a cloud-based database (Postgresql RDS) to an on-premise server ? 2) I want to do this, so that I ...
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1answer
44 views

'DROP TABLE mysql.failover_console;' replicates to slaves, but 'Use mysql; DROP TABLE failover_console;' does not

I am currently looking to setup automatic failover for my MySQL 5.6.21 Master on CentOS 6.6. I have mysqlfailover set up in my lab, and it is working well enough. My question is not about that, but ...