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

learn more… | top users | synonyms

0
votes
0answers
58 views

Subscription fails with Incorrect syntax near '9'

In my Distributor To Subscriber History I get the following error: Command attempted: 9 (Transaction sequence number: 0x0018E94F0000207A006200000000, Command ID: 59) Error messages: ...
1
vote
2answers
366 views

SHOW SLAVE HOSTS shows incorrect output

I had used --report-host option in one of my slaves, so that I could see that under SHOW SLAVE HOSTS. Now that server is no longer in use. I have uninstalled that server as well. Unfortunately I still ...
1
vote
0answers
57 views

mongodb replicaset

I am adding a new member in ReplicaSet and it starts initial sync bur after certain point sync break and start resync again.this process continue and never complete its initial sync.so please resolve ...
0
votes
0answers
33 views

Bucardo status does not feel if the slave is down

I am using bucardo as third party to postgresql replication between two sites. everything ok except buacrdo status <sync_name>. I have a Master-slave sync on master server. when I poweroff the ...
0
votes
1answer
279 views

MySQL asynchronous multi master replication conflict resolution

I have setup Multi Master replication, following this blog thread: http://0wned.it/geek-bits/guides/mysql-multi-master-replication/ And now it synchronizes perfectly, up until the moment the ...
1
vote
0answers
133 views

Looking for a good 3rd party Microsoft SQL replication app! [closed]

We have an existing Microsoft 2008 SQL R2 database that we need to real time replicate to an identical off-site live web database. Transactional replication and merge replication will not be able to ...
0
votes
1answer
58 views

Read Replicas with multiple instances of MySQL running on different ports

I have a specific need to create a single linux server which can host 4 MySQL instances with read replication. Here are a few questions I cannot seem to find answers to: Can you setup read ...
2
votes
0answers
123 views

Is there a way to replicate Postgres databases in Amazon RDS between regions?

We have a Postgres RDS instance in the AWS Oregon Region. For some supposed legal reasons, we have to host our client's European data in the Ireland AWS Region, but we need that data synchronized to ...
3
votes
1answer
62 views

Centralized master data shared among other several DBs

I'm researching and investigating about all possible ways to create a master data database for my portfolio of applications. To give you a quick overview, an example will come in handy: I want to ...
0
votes
0answers
15 views

MySQL - HOWTO speed up slave replication on large database / Quickly spawn slave? [duplicate]

We have a large mysql database (about 100GB on disk) that we would like to spawn a slave for. Our typical process for creating a slave is: Create a slave server Load in a mysql dump of the master ...
2
votes
1answer
462 views

pt-heartbeat showing “Host is blocked because of many connection errors”…but connections are well under limit

I'm running MySQL in a master-slave configuration. pt-heartbeat is showing "Host is blocked because of many connection errors"...but connections are well under limit (limit is 600 connections, MySQL ...
0
votes
1answer
38 views

MySQL replication issue when master gets restarted

I have the following environment: NodeA and NodeB in NDB cluster. NodeC InnoDB outside cluster. NodeB is replication master and NodeC is slave. I have set up replication and it works fine. The ...
0
votes
2answers
31 views

Build replication from backup not publication source

I have an interesting scenario I am trying to find a solution to. We currently have the current setup. ProductionDatabase (publisher) is the publication for transnational replication to the ...
3
votes
1answer
56 views

In which server does the snapshot agent run?

While configuring a publisher for replication, we execute sp_startpublication_snapshot SP and provide the publication name as a parameter to the SP. We do not specify the distribution server's ...
1
vote
1answer
42 views

Will Transactional Replication Work?

I have multiple site servers and a central server. Each has a Widget table with identical schema. There is currently a custom process that sends new Widget records from the site server that ...
1
vote
0answers
91 views

Replication of a remote MySQL database to local MySQL database

I'm the developer of my employers corporate private website, a HTML5/PHP/CSS powered site for company reports etc. The site, hosted on a shared hosting package, connects to a remote read-only MySQL DB ...
0
votes
0answers
88 views

Replication saying my snapshot Publication Does Not Exist. But it does exist

enter code hereI used the SQL Server (2008) wizard to create a new snapshot publication on my sever called "BlinkViewsOnly" in the BlinkDataMaster database. Publication was created successfully. I ...
1
vote
1answer
23 views

Restarting a Publisher involved in Merge replication

Our hosting provider would like restart the SQL Server that a publisher in a merge replication topology. I'm not able to clearly understand best practice for doing this from the Microsoft docs. Our ...
1
vote
0answers
82 views

“Replicate” Table structures with sp_addscriptexec

In our customers environment is a massive central server (running SQL Server Enterprise 2008R2) and some distributed PCs (running SQL Server Standard 2008R2). The central server has a replication for ...
1
vote
0answers
2k views

mysql 5.6 GTID replication 'Got fatal error 1236 from master when reading data from binary log'

I Checked SHOW SLAVE STATUS error is "'Got fatal error 1236 from master when reading data from binary log: ''The slave is connecting using CHANGE MASTER TO MASTER_AUTO_POSITION = 1, but the master ...
1
vote
1answer
41 views

In MySQL how do I grant a user access to a read replica only?

I have some users that I want to grant read only access to my database so I setup a replica server, but I don't want to grant them access to the master. I'd assume that this is a common use case, but ...
0
votes
2answers
38 views

Mysql replication with c

I have huge database on MySql and It's become more and more huge. So, Now I am facing performance issues with my database. Some of tables has millions of records in it. like my login detail table ...
2
votes
1answer
94 views

InnoDB: “Only one log file found” after binary import

My first one on DBA... After successful upgrading a master MySQL server 5.5 to 5.6.17 (CentOS 6 VPS serer), I done and moved my binary backups to a slave server (same version 5.6.17 but different ...
1
vote
0answers
78 views

sqlcmd returning NUL instead of NULL for tinyint column

sqlcmd -E -d MyDatabase -Q "sp_helpsubscription" -s "," -o file.csv -W -u Column 23 which is suppose to be a tinyint (subscriber_type) is output as NUL instead of NULL when the value is NULL. I ...
0
votes
0answers
181 views

SQL server replication error - the row was not found at the Subscriber

I am doing transactional replication on specific tables. I am getting an error: The row was not found at the Subscriber when applying the replicated command. (Source: MSSQLServer, Error number: ...
0
votes
1answer
487 views

Need a log based replication / CDC solution to publish postgres to oracle subscribers

We have a moderately large postgres 9.1 db that is currently 3TB and will likely grow much larger over the next couple of years. we need a reliable and fast solution for moving this data into either ...
0
votes
3answers
148 views

Master-master Replication with 3 Nodes

I need to configure mysql master/master replication with 3 nodes. Currently I have master/slave setup and I need to move it to master/master with 3 nodes. I have gone through some posts about ...
1
vote
1answer
20 views

Bypassed, Empty Relay Log

We have a simple 1:1 Master-Slave replication configuration. The Master crashed, but we recovered and replication seems fine (confirmed by pt-heartbeat and SHOW SLAVE STATUS) but we've picked up one ...
0
votes
2answers
71 views

Mysql checksum for master-slave replication returning different values, despite being identical

I've set up a master slave replication in mysql and to make sure that I know if the data starts getting out of sync I created a script that: Locks both databases on both servers. Prints the ...
2
votes
2answers
178 views

MySQL 5.6: Slave_IO thread stops working

Standard replication breaks for no apparent reason. mysql> SELECT @@version, @@version_comment; +---------------+----------------------------------------------------------------------------+ | ...
1
vote
1answer
82 views

Does PostgreSQL support multi-threaded replication?

Is PostgreSQL replication single-threaded ? Are there any tools to achieve multi-threaded replication ? I'm asking this since Mariadb support this and currently I'm learning both these dbs.
2
votes
1answer
116 views

Promotion of PostgreSQL standby and application reconnection

Background: I work for a small company. We have been using PostgreSQL on Heroku as one of our core technologies. While, in general, we've been happy with Heroku, the company has made the decision ...
0
votes
0answers
56 views

Database design for large incoming data

I've been tasked to design a database to handle a large volume of incoming traffic from sensor readings, possibly 1,000s an hour when it's at full strength. Each reading will be relatively short - ...
0
votes
1answer
36 views

mongodb - “replication oplog window” possibly reduced due to profiling - when profiling disabled no change?

PROBLEM I have a 3 member replica set (no sharding) running mongodb version 2.4.8. Using MMS (Mongo Monitoring) I can see that on 7th July 2014 at 12:00 my "replication oplog window" dropped from ...
2
votes
1answer
234 views

Can I replicate a database from SQL Server 2012 to SQL Server 2014 (with 2014 distributor)?

I am planning to have database replication running from SQL Server 2012 (publisher) to SQL Server 2014 (both distributor and subscriber) -- pull replication. Has anyone done this type of ...
0
votes
0answers
49 views

mongodb master slave replication

I Have Setup master slave replication in mongo its working fine for few month then after that suddenly replication fails.I have started again with initial sync but during sync after a specific point ...
0
votes
1answer
136 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 ...
1
vote
0answers
123 views

Error to connect mongos when trying to create replicated sharded cluster

I'm trying to create an replicated sharded cluster in mongodb. Initially I've created two shards and there are a replica set with three members in each shard. And all the shards and replicasets run in ...
0
votes
1answer
409 views

MySQL row-based-replication HA_ERR_KEY_NOT_FOUND… which record is it?

I have a mysql slave (5.1) using row-based replication. The slave has stopped with the error HA_ERR_KEY_NOT_FOUND. OK fine, it's trying to update a record that doesn't exist for some reason. Using the ...
1
vote
1answer
132 views

MS SQL Server 2012: once a day full replication (automatic backup/restore) for reporting

Our company is w/o a DBA, and it has fallen on me (a complete DB noob) to handle some critical database tasks. I'm looking for the best solution for us to be able to "copy" a full database to another ...
0
votes
1answer
26 views

Can I generate binary logs if they weren't turned on?

Ok, so here's the scenario: Our master went down, boom! gone (Call this one DB1) We switched our backup replica server. Ok, life is good, sort of (Call this DB2) Binary logs were not turned on for ...
2
votes
1answer
37 views

Cannot start SQL Server replication as already running

I'm trying to configure a sql replication on the sql server 2012 . I am logged in as "sa", when I attempt to start replication i get the following error : How can I stop this job and restart the ...
2
votes
3answers
1k views

ETL: extraction strategy for 200 source databases

What is the best extraction strategy for approximately 200 SQL Server 2005 source databases (same schema) for a daily load into a staging area in preparation for data warehouse cleansing, ...
3
votes
2answers
415 views

Data sharing between client and server two ways

One of my Silverlight applications is running. This Application is using one central database (SQL Server 2008) and three other client databases (SQL Server 2008) in server other locations. Our ...
1
vote
1answer
72 views

Safely changing innodb_buffer_pool_size on MySQL replication master?

We have a MySQL server which is a replication master. We need to change the innodb_buffer_pool_size and innodb_flush_method to (hopefully) improve performance as the database has grown. What is the ...
1
vote
1answer
48 views

MySQL replication working fine, but still shows “Waiting for master to send event” at 280000 seconds

To repeat the title: MySQL replication working fine, but mytop still shows a thread "Waiting for master to send event". It has been like this for a few days, and is now at 280000 seconds. But ...
0
votes
1answer
26 views

Mongo DB - reading during update

Is it possible in a three-member-replica set (1 primary, 2 secondaries) to update records on the primary, or even delete several records and insert the updated data, and still execute read-ops on the ...
1
vote
2answers
49 views

mysqld is not producing binary log

I'm trying to understand why mysqld is not writing binary log anymore... [root@ip-10-179-155-214 mysql]# grep ^log-bin /etc/my.cnf log-bin=mysql-bin [root@ip-10-179-155-214 mysql]# ll mysql-bin.* ...
0
votes
0answers
40 views

Is there a MySQL setup for my use case?

I have multiple nodes that are mostly independent of each other, meaning 99% of traffic is reads to data contained inside themselves, plus some writes that need to be instantly available for the node ...
6
votes
3answers
6k views

MySQL replication - slave is continuously lagging behind master

I am using MySQL-5.1.50 with a Master-slave replication setup. Most of the time the slave is lagging behind the master. When I run show processlist;, there is no query that's taking a long time. ...