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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WSREP: Requesting state transfer failed: -11(Resource temporarily unavailable)

We have a 3 node Galera cluster. Only one node has "valid" data (gal-1). The other nodes need to sync from this node. I delete datadir and start MariaDB. 160527 14:28:20 [Note] WSREP: discarding ...
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556 views

MySQL replication error 1146

Any idea why there is '1146 - table doesn't exists' on 'CREATE TABLE IF NOT EXISTS...' statement. It actually happened only on one of the slaves (there are two in total): Last_SQL_Error: Error 'Table ...
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How did you setup MySQL Replication with autofailover that is app transparent?

Recently told MySQL is shelving MySQL Fabric. Interested how others have implemented a MySQL replicated environment that is app transparent. I am considering using HA Proxy to host virtual IP ...
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34 views

Would SQL Replication prove to be a FASTER option than downloading compressed DB files every time from servers at different geographic locations?

My requirement of synchronising two DB servers in different geographic locations is as follows synchronise some DBs on 2 servers in regular intervals (manual). One in US is an intermediate release ...
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1k views

Duplicate entry in MySQL slave

I have a MySQL master-slave replication setup. When I checked show slave status, I got the result as Slave_Sql_running:No and last error as Duplicate entry 'x' on query. But when I tried to delete ...
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278 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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134 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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19 views

How to set up repl_distributor for data access

I need to run queries on the distributor server from the publisher during deployment in a transactional replication setup. I see repl_distributor is set up as a linked server, but am having trouble ...
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9 views

Postgres archive_command on Ubuntu 16.04

Ubuntu 16.04: Postgres 9.5: When i start psql -c "select pg_stop_backup();" command to execute for hot standby replica. It gives me warning as archive_command as: NOTICE: pg_stop_backup cleanup ...
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MySQL 5.5 to 5.7 doesn't work, apparently this is a feature?

Has anyone found a way yet of circumventing MySQL 5.7s insistence that it's Master must have a server_UUID. I currently have multiple instances of MySQL 5.5 over various sites, and want to look at ...
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6k 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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544 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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116 views

MySQL Circular Replication

I have this scenario where I have 4 MySQL servers (A,B,C,D), as this: Server (A) is always online, and serves as the main website. Servers (B,C and D) are online on random periods of the day, and ...
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mysql replication and GRANT that doesn't quite grant

I am trying to set up mysql replication. All's well, but I see an error 1045 for the slave: mysql> show slave status\G *************************** 1. row *************************** ...
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8k views

MySQL Slave replication: Need to determine where replication left off to start slave in correct location

Idiotically I rebooted a machine that is used as a MySQL slave without running STOP SLAVE, FLUSH TABLES first. I had thought MySQL automatically handles all of this during a machine reboot, but ...
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18 views

Why does updating a large VARBINARY break replication (MSSQL_REPL21100)?

We have replication set up on a VARBINARY(MAX) column that stores image data (yes, yes, I know - don't blame me, I didn't design it). Recently, we started inserting larger images (around 200kb) and ...
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34 views

Is there a cheap way to bulk select/insert data between SQL Server instances?

In my office, our employees use applications that are consistently writing transaction-type data to a number of databases on a SQL Server 2012. The traffic consists mainly of inserts and updates but ...
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35 views

Replacement for transactional replication

My colleagues and I have to migrate a database from SQL Server 2008 R2 to SQL Server 2012. Schema, triggers, stored procedures etc. are working fine. But we also have to "migrate" the replication ...
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28 views

Monitoring streaming replication

We're setting up streaming replication with one master and one (read-only) slave. We're now looking for a way to monitor the replication; mostly to verify that the slave server is still up-to-date. ...
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23 views

MySQL binary log - write operation

Consider a scenario, where you have a MySQL master and slave server in replication. As we know, binary log enabled on the master and the slave reads from the binary log of the master. From MySQL ...
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Chained MySQL replication from Master->Master replicated pair

This is a pictorial view of what I have: Master 1<----->Master 2 | | | | V V Slave 1 Slave 2 The masters are never written ...
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115 views

MySQL table replication on the same server

I have one the same server (Linux) two databases: db1 and db2 and I want to replicate db1.table1 to db2.table1 I added the following lines to my.cnf and restarted mysql service replicate-do-table = ...
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(mysql) Database replication between 2 DB while 3rd DB as backup

I am not an advanced DB admin or designer. I am sure there are articles on this kind of scenario, probably too many. So I got confused and not sure which solution is appropriate/best for me. I am ...
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Add article to transactional publication without generating new snapshot

Using SQL 2008 R2 transactional replication with pull subscribers, when we add an article, I'd like to avoid having to create an entire snapshot (the db is ~80 GB, so this takes hours). From this ...
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24 views

MySQL error 1593 on replication between 5.5 on WIndows and 5.6 on CentOS 7

I'm setting up replication between the live server (running Windows 2008 R2 and MySQL 5.5.19) and a dedicated replication server (running CentOS 7 and MySQL 5.6.30). The CentOS box does have MySQL not ...
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Too many open connections with MongoDB 2.6 + PyMongo 2.7.2

I was running MongoDB 2.4 with a replica set which contains 1 primary, 1 secondary and an arbiter. We were using PyMongo 2.6 and MongoEngine 0.8.2. Recently, we performed an upgrade to MongoDB 2.6, ...
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SQL Server Transactional Replication and Security Setup

I am new to SQL Server replication. I was able to setup transactional replication successfully, but I feel like I am missing some important concepts regarding security and accounts. I have a few basic ...
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5k 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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43 views

Setup MySQL Master to Master replication/automatic failover when each Master also has a Slave

Thanks in advance. I have always worked with SQL Server and never really had any exposure to MySQL. I now have to determine the preferred setup for MySQL when there are four servers involved. ...
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63 views

Error 1236 - “Could not find first log file name in binary log index file”

Our setup: Master: MariaDB 10.0.21 Slave: MariaDB 10.0.17 Replication was working fine until recently at which point the slave's DBs had to be restored from a dump. I performed all of the ...
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743 views

After Restore Log_reuse_wait_desc of Replication

I'm wondering if anybody has ran into this issue before and has any suggestions on what's causing it/how to fix it. We are restoring a database into lower Dev environments and after the restore the ...
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28 views

MySQL Replication Duplicate Entry for Primary Key

160523 13:07:29 [ERROR] Slave SQL: Error 'Duplicate entry '914166' for key 'PRIMARY'' on query. Default database: 'zo_dev_20121216'. Query: 'UPDATE activity SET activity_type_id = 9, ...
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2k views

Permanent count of waiting tasks (2) in Activity monitor

Now I'm observing in Activity Monitor permanent count of waiting tasks: and at "Resource waits" tab I see next: so, my question is: How to find and resolve this wait tasks? I suspect that it ...
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Replication of PostgreSQL cluster from Datacenter to Office with write access

Some information about the cluster: Version: postgres 9.5 Size: /postgres/data$ du -hs . 854G OS: Ubuntu 14.04 LTS Storage: Raid10 SSD's I have a master-slave PostgreSQL 9.5 ...
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396 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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DDL doesn't work in MySQL master to master replication while DML can work?

I have two master in replication left master -> 5.5.47-log MySQL Community Server (GPL) rigth master ->5.5.47-log MySQL Community Server (GPL) "left master" mysql> create table test.left ...
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280 views

Postgresql Chained Slaves and Slave Promotion

So I have a setup like Master -> Slave1 -> Slave2. Slave1 replicates from Master and Slave2 replicates from Slave1. If I promote Slave1 to master is it possible for Slave2 to continue replicating from ...
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2k views

SQL Server 2014 Replication - The process could not connect to Subscriber 'xxx'

I have just set up very basic transactional replication on SQL Server 2014. The Publisher and Distributor are one and the same. I have configured the Publisher to push to the Subscriber, so any and ...
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223 views

MongoDB to MySQL Replication Automatically

i have Mongodb server and mysql server. i want to use mongodb for "write" and mysql for "read". so i am looking for some tool or some process by which we can tranfer mongodb to mysql server on ...
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44 views

How to do data migration between different schemas?

My company is in the process of migrating a customer's data from their third party system into our own system. We currently use a java application that we have developed in house that selects data ...
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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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2answers
480 views

Vague replication error code 2005

2015-04-07 13:49:53 23758 [ERROR] Slave I/O: error connecting to master 'replication'@master-host:3306' - retry-time: 60 retries: 1, Error_code: 2005 This was after attempting to do a change master ...
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13 views

Syncing data from primary member to secondary after election

Maybe this is kind a stupid question but, I'm novice in configuring replication and I need to clear something before makeing anything else. Moment ago I configured replica set with 3 members in it. ...
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2 Cluster managers Control same 2 nodes and control OLTP traffic?

can you have two cluster managers controlling the same 2 nodes so that you can achieve real time replication but still direct your oltp traffic to one node and your reports to the other node?
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47 views

Corrupt Transaction Log on database

I have reason to believe the transaction log file on my database is corrupt. This database is involved in transaction based replication (both subscription and publishing), and I'm unable to start ...
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304 views

Slave not getting replicated SERVER_UUID error

Unable to start replication Master-Slave, I have searched a lot for this but unable to get the Server-UUID of both the server. Do we have any solution for this. Scenario: I have created new slave ...
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29 views

How to force MySQL master to overwrite the slave

We have a LAMP architecture website. Currently we have a production server running on the cloud and each developer has a complete copy of both the code and the database. Code is synced through Git ...
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7k 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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508 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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150 views

Write-lock a whole table during transaction

I need to perform a delicate operation to my table in which I will solely insert, delete and select upon all of my rows and no God may interfere with the table during this operation: the table will be ...