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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After merge replication setup, tables at subscriber not getting any data from publisher

I have created a merge replication setup through Replication Wizard. After sync, it is observed that the subscriber DB gets created with the exact tables in publisher as intended, but on the ...
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How to force a delayed member to become primary in case of failure in mongodb

I have three member set [primary,secondary & arbiter] in my data center 1 [DC1]. Now i want a delayed member in data center 2 [DR]. In case DC 1 is completely down then my sub net application ...
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224 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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sql server transactional - replication - the internal procedures often deadlock with user processes

Very often I have deadlocks on my subscription server, involving the replication internal stored procedures and user processes either ad hoc or procedure queries. For example: Deadlock of the ...
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1answer
13 views

Where to look for Agent history in Replication?

In SQL server 2008R2 replication configuration, "agent history cleanup distribution" job by default runs every 10 minutes and deletes any historical data older the 48hrs. If I increase the retention ...
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TCP Provider: The semaphore timeout period has expired [on hold]

In Sql Server2008 R2 and Windows Server 2008R2, when I start Replication I have this error: TCP Provider: The semaphore timeout period has expired Please help me to solve it... Thanks!
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1k 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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1answer
231 views

Updateable Subscriptions: Rows do not match between Publisher and Subscriber

I have transactional replication with updatable subscribers set up in SQL Server 2008. It has 3 subscribers and 1 publisher. I had to setup replication again due to some errors related to the database ...
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28 views

Replication Configuration

I had a SQL Server 2008 Express edition as a Default instance and I am having SQL Server 2012 Evolution and SQL Server 2014 Evolution are my named instances. When I was trying to configure ...
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1answer
277 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 ...
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104 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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198 views

MySQL 5.6 replication causes 'waiting for table lock'

All of the sudden queries on slave server stopped with status "Waiting for table level lock" I restart mysql service and stop replications and locking does not show up anymore. Once I turn ...
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353 views

SQL Server 2008R2 - how to install replication components

I am trying to install the Replication components for SQL Server 2008R2, on technet website it says: On the computer that is running IIS, insert the SQL Server 2008 R2, SQL Server 2008, or SQL ...
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1answer
337 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
164 views

Using non-replicated read/write databases on a MySQL slave server

I have a MySQL slave server that has two databases being replicated from a master. What I'd like to do is add a third database that I will exclude from replication and use as a read/write database. ...
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2answers
332 views

SQL Server 2005 to 2012 Replication, cannot access replicated data

I have created publication (snapshot, small table with 10 rows) on MS SQL Server 2005. Then, I created push subscription on MS SQL Server 2012. When I try to select data form table, process takes ...
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24 views

How to troubleshoot, find and fix query Percona 5.6 with error “SQLSTATE[HY000]: General error: 1785 When @@GLOBAL.ENFORCE_GTID_CONSISTENCY = 1”

i'm running Magento CMS, and underneath there are 2 physical servers both with Percona Server version: 5.6.23-72.1-log Percona Server (GPL), Release 72.1, Revision 0503478 in Master/Slave ...
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1answer
646 views

How to generate replication snapshot without locking tables

When I reinitialize subscription and generate new snapshot it locks all tables and makes the database unusable for a very long time (never waited it out). Is there anyway to do this without locking?
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1answer
125 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
33 views

MySQL 5.6 Slaves Fail to Reconnect to older MySQL server when it goes down for backups

I have an existing replication setup with Masters and Slaves running MySQL 5.0. A long existing script runs at night which restarts MySQL on the master with skip-networking, runs a backup, and then ...
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4answers
12k views

Broken mysql replication on slave server (error 1236)

My question is: how to fix broken mysql replication on slave server (error 1236)? server 1 (192.168.1.105) server 2 (192.168.1.106) I ran these steps to re-sync: At the master - server 1 ...
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2answers
44 views

migrate db's - best way to mirror or replicate a full database

I would like to mirror/replicate my databases to the cloud. The cloud is setup using VPN to my actual machine. I am a bit confused by the options I have and would like to get some light into it. My ...
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18 views

Run MySQL replication by schedule or on demand

I have a master-slave replication currently configured. I know this setup runs real time. Is it possible to sync only the databases on schedule (daily or weekly) or by demand? Thanks!
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108 views

MySQL - How to see the queries executing by slave io thread

We have a strange problem with MySQL replication. We have observed huge load and IO wait on server while replication is in progress. We can have information of the queries from bin-log by using ...
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1answer
444 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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536 views

mysql replication - missing table for foreign key on slave

i have the following situation: We're running a simple master slave replication with table filters, so the slaves doesn't have all the master tables. Master has table A with FK to table B Slave has ...
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Warm Standby PostgreSQL 9.4 error; FATAL: the database system is starting up [closed]

I want to setup a Master and a warm standby, so far here's what I have setup: Master postgresql.conf listen_addresses = '*' wal_level = archive archive_mode = on archive_command = 'copy "%p" ...
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30 views

Converting MySQL master-master replication to master-standby

I set up two mysql servers in a master-master configuration. This was working fine until recently when I encountered a duplicate-key problem. After doing some research and evaluating my needs, I ...
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1answer
604 views

All four data nodes in MySQL Cluster in same node group

I am testing MySQL Cluster 7.2. I have two servers, mysql1 and mysql2. I want the management server and two data nodes to run on mysql1 and two other data nodes to run on mysql2. My config.ini file ...
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1answer
566 views

What are alternatives to Replication to distibute data (Microsoft SQL Server)

Is anyone knowledgeable of alternatives to SQL Server replication? I have a scenario where separate databases will share a lot of the same data which complex queries will match against. We want to ...
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1answer
392 views

pgpool2 not working on my Ubuntu i686 athlon i386 GNU/Linux

I am trying to implement replication and load balancing on my Ubuntu i686 athlon i386 GNU/Linux.for creating database clustures I have installed postgresql contrib 9.1.11 having initially database ...
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1answer
53 views

Can SQL Server replication be used for Point-of-Sale (POS)?

We are looking for a solution that will synchronize the databases of our POS. The scenario says we have 3 POS with SQL Server Express installed on each machine. We want these databases to be in-sync ...
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1k views

MySQL slave stuck at 'System lock' most of the time, high CPU usage

Let me describe what we are facing now: We have a MySQL Master-Slave, Row Based Replication setup and at the moment, the slave is stuck with a perpetual System Lock. The Master is an active server ...
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1answer
1k views

Cannot get my slave - replication server to start

My replication server will not start. I have followed the instructions here: http://opensourcedbms.com/dbms/setup-replication-with-postgres-9-2-on-centos-6redhat-el6fedora/ As well as several other ...
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1answer
627 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
704 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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1k 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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3answers
192 views

Question on having a MySQL 5.1 replicate from a MySQL 5.6 DB

I have a question in regards of what potential issues that might happen with a MySQL 5.1 DB that replicates from a MySQL 5.6 DB. I know the risks involved based on resources such as ...
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1answer
171 views

MongoDB can't add new replica set member

I have a replica set, and I added a new member to the set. The initialSync begins for the new member and rs.status (on primary) shows STARTUP2 as status. However, after a long enough time, there's a ...
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1answer
2k views

Mysql replication is enabled but stuck at “waiting for binlog to be updated”

I have set up replication between an existing database (server-id=23), and a new one (server-id=51). I have followed the steps in this stackoverflow question, but replication is not happening. On ...
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1answer
74 views

“Oneway” Replication from Oracle DB to TimesTen

currently I'm really stuck into a problem and I not able to finde a nice way to realize that. I need a suggestion to replicate from oracle db (some tables) to a TimesTen. A connection is only ...
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2answers
3k 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?
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1answer
149 views

How can I compare the server impact of transaction replication

We are developing a system that must extract data from an existing SQL Server 2008 R2 cluster. One of our design goals is to limit the performance impact on that cluster as much as is practical. ...
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61 views

Having DB Mirroring and Replication together

Can anybody help me understand why do one go combination of Database Mirroring + Replication. Why can't I just have Database mirroring for high availability of my database. What is the need of ...
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1answer
612 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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12 views

Is there Merge and Snapshot replication methods for MySQL?

In distributed database systems, is Merge and Snapshot replication supported in MySQL? I am thinking of something similar to MS SQL's types of replication: ...
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1answer
150 views

Peer-to-Peer Transactional Replication Load Balancing in MS SQL Server

I'm looking at Peer-to-Peer Transactional Replication and it looks like a perfect fit for my requirements, but there's one unclear part - load balancing (see picture below). How it is implemented in ...
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1answer
42 views

Secondary replica indexing

I have a question, about a question, that is part of the 70-462 Microsoft exam. I had this question today, and I'm not completely sure of the correct answer. While I did pass the exam, I would like ...
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2answers
5k views

MySQL relay log corrupted, how do I fix it? Tried but failed

A MySQL v5.1.61 relay got corrupted when the machine suddenly shut down. I tried to fix it but it didn't work. — How do I fix it? Did I do something wrong? As far as I've read, corrupted MySQL relay ...
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1answer
857 views

Merge reports 'You must rerun snapshot because current snapshot files are obsolete', gets caught in Death Loop

We have a very large Merge publication for a data warehouse with some large (.bcp files on the order of 20GB) fact tables that is causing us tremendous trouble. Specifically, we created a publication ...