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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243 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
29 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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4k views

Temporarily Disable Sql Replication

Due to a business need, I may need to disable transactional replication in my environment (Sql 2k -> Sql 2008). Functionally, I understand this to mean that I will need to drop subscriptions and ...
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37 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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1answer
10k views

MySQL: InnoDB keeps crashing - how to recover?

# free -m total used free shared buffers cached Mem: 48289 35288 13000 0 347 30399 -/+ buffers/cache: 4541 43747 ...
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47 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
437 views

Huge size on mongodb's gridfs. Should I compact?

I’m running MongoDB and grid.fs to store small files (less than 20mbs). These are part of a replica set. I currently have more than 350000 files stored. I’ve noticed that the chunks collection takes ...
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1answer
290 views

Percona XtraDB Cluster/MariaDB Galera Cluster - replication suddenly stops working, cluster thinks it is in “Synced” state

We are trying to populate an empty Galera cluster using myloader. We use the latest version of myloader from repo trunk, the command is as follows: /root/mydumper/myloader -d ...
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1answer
797 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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30 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
86 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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2answers
2k views

How could one monitor MySQL replication?

I am not a DBA, but I am interested in knowing how replication monitoring is done on MySQL severs. In order to know if a slave is in sync with its master, one would typically check ...
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23 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
59 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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1answer
53 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 ...
2
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1answer
28 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.
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1answer
60 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
113 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 ...
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1answer
28 views

Database structure setup

We're currently in the process of moving our hosting services to something which will allow us to scale our infrastructure and requirements. Essentially we're using MySQL to: Run our websites. Run ...
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2answers
757 views

“Arithmetic overflow” when initializing SQL Server 2012 replication from backup [closed]

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
36 views

Does Galera Cluster rsync only updated files or all files

We're currently setting up a galera cluster using rsync for sst. The datadir is currently 20Gig and right now we're only updating about 4 (very large) tables. I know that rsync normally only ...
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1answer
27 views

MySQL replication mystery

May I ask if its possible to have a table on Slave server. But it does not exist on Master Servers? how come this one happens? Thank you.
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1answer
54 views

MySQL Cluster Replication Merge

We'd like to have two MySQL cluster groups, and at the same time have replication set up between them. Is that possible?
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1answer
112 views

Offsite Log Shipping

We currently use CDC to replicated our Production DB offsite (Microsoft SQL Server 2008 R2), but using CDC and the way we process the files is very unstable. Also note that the two servers cannot ...
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1answer
67 views

ALTER TABLE blocking in MySQL 5.6

I have a question with a MySQL 5.6 master-slave setup. If I were to modify the master's schema with an ALTER TABLE SQL query, then when the slave tries to execute that ALTER TABLE statement too, would ...
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4answers
552 views

Transaction Log won't shrink, DB thinks it is replicating

I've got a SQL Server 2008 R2 Express database running Kaspersky Security Center, and I have no idea under what circumstances the install happened, but the database appears to think that it's being ...
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2answers
31 views

MySQL rapid Data Replication from multiple Databases

I am a Freelance Web Developer but not a Database Administrator at all except basic Database Operations like DML etc. Today I got a client asking me to develop a Web based application but there is a ...
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0answers
187 views

SQL Replication With Always On Availability Group

We have an always-on SQL 2012 availability group with two replica servers and an AG listener. Doing merge replication via anonymous subscriptions through IIS between SQL and multiple remote clients ...
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2answers
69 views

Mysql replication from existing slave to new slave

I'm hoping you experts can help advise me, I've got this topology: Live DB(Master) ----> Backup Server (Master and slave) ----> Test DB Backup server is a slave of Live DB, and Test DB is a slave of ...
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60 views

mysqldbcompare showing AUTO_INCREMENT differences but there are no missing records

I am encountering a strange issue when using mysqldbcompare to compare two MySQL DBs(one is a master, the other its slave). I noticed that the tool notes that the AUTO_INCREMENT values of this ...
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0answers
330 views

How to solve MySql Slave Error 1452 Foreign key constraint fails?

I am site administrator. We use to have a mysql 5.5.40 master(db01) - slave(db02) setup. One day our master server (db01) got down due to hardware failure. So we switched our site to slave (db02) ...
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20 views

Replication lag is causing issue on one shard

I am running a mongo db sharded cluster with two shards. Each shard has one primary, one arbiter and one secondary. On one shard I am facing an issue with replication as it is showing this result ...
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1answer
154 views

Best practise how to sync SQL Server 2014 database with other database

What is best practise if we have application using a SQL Server database and we would like to have backup if SQL Server does not work? Our scenario: We would like to use our main SQL Server ...
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56 views

Mysql Multi master replication - auto_increment for tables with natural primary key?

I am thinking about using Master-Master replication using Mysql 5.6.19 with InnoDB as the engine. From what I have been reading, looks like I should be using auto_increment_offset and ...
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1answer
21 views

MYSQL Group Replication

I have setup a Master-Master-Slave replication where say A B and C, I want to replicate data from A to B (which is working) and B to C (also working) and from A to C which is not working with two ...
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1answer
97 views

re-enabling a table for mysql replication

We were able to setup mysql master-slave replication with the following version on both master/slave: mysqld Ver 5.5.28-29.1-log for Linux on x86_64 (Percona Server (GPL), Release 29.1) One day, ...
0
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1answer
32 views

I couldn't see Conflict tables in replication monitor SQL Server 2008 R2 in Merge Replication

I work with merge replication in SQL Server 2008 R2. In the replication monitor I can't see conflict table, I must to see conflict tables in "MSmerge_conflicts_info", please help me. How to see ...
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1answer
57 views

Question on turning on GTID for MySQL master and slaves

I came across the interesting article by Facebook's Engineering team where they were able to deploy GTID in MySQL at a large scale : ...
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2answers
168 views

MongoDB replicaset number of connections too high

I'm using a 3 node replicaset with 2 data nodes(version 2.6.1 and 2.6.3) and 1 arbiter node. I get frequent alerts on number of connections >1000, whereas total databases are about 400 and also I'm ...
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2answers
71 views

Is there a way to replicate certain part of collection in Mongodb

Is there away to stream certain part of collection in MongoDB or TokuMX from master server to another server? I need to duplicate only certain collection Or if it isn't possible, are there any other ...
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1answer
70 views

Postgresql - Streaming replication - STONITH

Current situation: PostgreSQL, streaming replication Master failed, I created the trigger file. Slave is promoted to new master After the old master restarted successfully, I have to create base ...
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2answers
311 views

Reinitializing Subscription Performance

I have 4 Servers, Servers A, B, C, D. Server A publishes a Replication instance, and Servers B, C, D have Pull Subscriptions to it. Server B's subscription needs to be Reinitialized, but I am ...
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1answer
24 views

Multi-master synching in three geographically separate datacentres

Our company needs to create an application that operates in all parts of the world. We are looking to have three servers (one in Europe, one in Asia and one in America). I'm looking to use ...
5
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2answers
386 views

Why Do Replication Deletes Require sysadmin Access

I am running merge replication with SQL 2012. There seems to be a nasty consequence of the delete triggers added for replication in SQL 2012. Inside the delete triggers are this, select @xe_message ...
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1answer
87 views

Problem Getting Simple Replication to Work in SQL Server 2008/2012

I can't resolve a problem with replication. The publisher/distribution side seems just fine, but when I subscribe and view in the replication monitor I always get this error: "a required privilege is ...
0
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1answer
37 views

Can any one Explain me What is the Use of Cascading Replication in Postgresql?

What are the advantages of cascading replication in PostgreSQL. I have done Testing On this With three nodes. M1---->S1----->S2 What is the Use if My master(M1) goes Down(failover). Where the ...
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0answers
22 views

Sudden (and drastic) decrease in commands/second on replicated slave

On a slave that uses statement-based replication from a failover of master (all running mysql 5.6), the number of queries executed per minute has suddenly decreased from ~20k during peak traffic to ...
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1answer
27 views

Replication on same physical server [duplicate]

I am new to DB. We have galera cluster on Test environment where mariaDB is replicated in 3 servers. Now customer want us to work with only 1 server. they cant provide 3. Can we do replication on ...
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22 views

MySQL Remote Database Failover: Need Advice

I run a network of sites all on 1 server. To improve performance, I'm (finally) moving the MySQL database to a remote machine. I'd love anyone's advice on how to appropriately approach failover. ...
0
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1answer
33 views

MySQL Circular replication with fail over

I have 3 MySQL servers which is running with circular replication. Server A version - 5.5 Server B version - 5.6.21 Server C version - 5.6.21 Master Server FOR Slave Server C ...