Tagged Questions

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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3
votes
2answers
671 views

Streaming Replication Log is puzzling me

I have a streaming replication hot-standby setup, which seems to be running all good. I can login, execute selects and the result seems to be up-to-date with the master. However in the log of the ...
2
votes
2answers
64 views

Replication between SQL Server 2005 - 2005

I'm hoping to get some help with a SQL Server 2005 replication issue. In short, in replication monitor, (On the Publisher), on the 'Distributor to Subscriber History' tab, I see two lines under ...
1
vote
0answers
26 views

The @article parameter value must be 'all' for immediate_sync publications

I have a publication of 4 tables and many subscribers (transactional push replication), most of them being interested by one of those 4 tables. Everything is working fine as long as I create the ...
0
votes
0answers
207 views

Mysql replication broke after mysql upgrade on master

I've seen this question, but I am not sure if the solution is right for my particular error (replication breaks after upgrading master) I upgrade my master server's mysql from 5.5.34 to 5.5.35. After ...
0
votes
1answer
413 views

Streaming replication between postgresql 9.2 and 9.3

Does anyone know if it's problematic to have a postgresql 9.3 slave setup to do streaming replication from a postgresql 9.2 master?
0
votes
1answer
255 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 ...
0
votes
0answers
41 views

Probable database replication issue in LAMP setup with Master/Master MySQL replication

I have been facing issues in my high availability failover (on WAN links) LAMP setup hosting a Drupal CMS based site, approximately after every 2 months both servers suddenly stop responding to http ...
2
votes
1answer
139 views

Is it possible to replicate wide table in MS SQL?

The reason of me using sparse columns is to overcome limit of 1024 columns in a table (I know that generally it's not a good reason and there are downsides, but in my situation it's good option ...
2
votes
1answer
215 views

Postgresql 9.2.6 ignoring archive_command

I'm attempting to set up a 3-server chain by leveraging WAL-E. I've done this in the past with replication/wal segments and I'm attempting the exact same method, just with using WAL-E in between. My ...
0
votes
0answers
70 views

SQL Server 2012 Replication Initialisation Fails — Table keeps being dropped

I have two servers - one located in Australia (Distributor / Publisher), and a second in the UK (Subscriber) both on Amazon's cloud. I have attempted to configure replication as both pull and push ...
0
votes
0answers
368 views

Redis Master/Master or Shared Storage

I'm setting up Active/Passive Redis setup for a client of mine. I have a high performance NFS storage where I'm storing the configs and the data currently. I'm just wondering if it would be best to ...
0
votes
0answers
35 views

On replicating all tables of a given database except for those starting with some pattern

I'd like a slave to replicate all tables of a given database except for those starting with some pattern, eg. those with names starting with 'nc' (non-critical, redundant denormalized tables). So I ...
0
votes
0answers
79 views

Upgrade 2 servers with master-master replication without data loss

We have two MySQL servers running with master-master replication in a Pacemaker cluster. If a database operation should be done, the primary server is asked first to do the job, if it fails, the ...
0
votes
2answers
396 views

Cannot stop MySQL 5.5 replication threads

We have a master-master replication setup using MySQL 5.5. On one of the servers I am trying to stop the slave thread, but without success. To ensure that the replication does not connect to a real ...
0
votes
2answers
331 views

MySQL Master/Slave replication on same VM instance?

I'm fairly new to databases so I hope this isn't a silly question! Is it possible to set up master/slave replication on the SAME server? I understand there are not any advantages to this in terms of ...
1
vote
2answers
133 views

MySQL replication: slave not updated

This has been asked many times over but we really cannot get a simple Master-Slave Mysql (5.5.25) replication to work for our two dbs (FatTree and Torus). And no trace of error in the logs. The ...
3
votes
1answer
289 views

With SQL transactional replication, does changing user permissions to a table trigger a new snapshot?

I was hoping to get some help with a SQL Server 2012 transactional replication scenario - or maybe just my understanding of where permissions are stored in SQL server. If I change a users permissions ...
1
vote
0answers
69 views

SQL Server replication - recommendations for stability

We have two SQL Server 2008R2 Standard servers, and we've set up replication of a single database between them. The replication is about as simple as it can get - it's a transactional replication from ...
0
votes
0answers
153 views

SQL Server 2012 Transactional Replication Issue — Table Data not updating at subscriber

In my projects we configured Transactional Replication for my Database - one publisher, one distributor and two subscribers For 2nd subscriber every table data is updating properly But for 1st ...
2
votes
1answer
214 views

Can I configure MySQL replication to break when I run a “drop database” or “drop table” command on the master?

Basically, what the title says. This would enhance the failover quality of our systems, becuase we have run into issues of people thinking that they were in a test environment running drop statements ...
1
vote
1answer
680 views

Postgres replication: Do I need to rsync pg_xlog files if I have archiving setup in master?

I am trying to replicate a master to slave, without shutting down my master. In the tutorial here: http://wiki.postgresql.org/wiki/Binary_Replication_Tutorial, they recommend these steps: ...
1
vote
0answers
271 views

Postgres database zero down time production deployment

I need some idea about how I can deploy a financial application in production environment using PostgreSQL DB with zero down time. I have two servers in Master-Slave design. Currently I am giving ...
1
vote
4answers
108 views

Backup from Server1 and restore it to Server2?

IF we have two Servers installed with SQL Server 2008 instances, Server1 has three drives C, D and E with 100, 500 and 500 GB respectively and Server2 has three drives C, D and E with 100, 300 and ...
3
votes
2answers
41 views

Is my Publisher database my actual source database or is it a new database?

I am setting up transactional replication for the first time and am working through my backup policies I need to set. Is my Publisher database my actual source database? Or is it a new database that ...
1
vote
1answer
119 views

Postgresql wal saving for standby servers that go offline

I use postgresql 9.1 replication to a lot of workstations that have postgresql on hot standby mode. However sometimes these workstations go offline and disconnect from the master server. If they go ...
0
votes
1answer
117 views

MySQL how to change a slave to a new master?

I have a MySQL active master (lets call it Alpha), a passive master (called Beta), and a slave (called Gamma). Topology before change: I am going to switch the active master and the passive ...
1
vote
1answer
54 views

Master-master database replication on 5 servers

My current project requires immediate replication between 5 databases. Servers are physically distributed across the globe. Currently we use Redis with one master server installed on another 6th ...
2
votes
1answer
175 views

Postgres: Purpose of archiving in master?

I am reading tutorials on how to setup streaming replication in Postgres from master to slave. Some tutorials recommend setting up archiving in the master (and restoring in slave) . In the master, ...
1
vote
1answer
68 views

Is the MySQL replica's data consistent if the Master was switched to binlog_format = MIXED but the Slave's relay logs were rotated sometime later?

The accepted answer to this question is very helpful but it's not clear to me if one should be concerned about the replication that occurred from the time the Master's binlog_format was changed to ...
0
votes
1answer
237 views

Abnormally high MySQL writes and larger than normal Binary Log files. How can I determine what caused this?

We have a MySQL master database which replicates to a MySQL slave. We were experiencing issues where MySQL was showing a high number of writes (but not an increased number of queries being ran) for a ...
1
vote
1answer
229 views

automatic transactional replication failover to noce2 with AG failover

I am working on to set up high availability group like SQL01,SQL02,SQL03(DR) and SQLRPT01 as the reporting server which has our reporting DB. * From SQL01 to RPT01, I am running transnational ...
1
vote
0answers
82 views

Data replication vs parallel shard query

I'm not a DBA, and I'm wondering how a SQL Server database can scale to fit the needs of a social network. I'm not interested in NOSQL, and I understand that caching plays an important role in ...
1
vote
0answers
67 views

Replication topology advice - central subscriber

I'm seeking guidance and advice about how to set up replication in MSSQL to deal with the following criteria. We have a central server hosted at a data center - this is where our web app is located. ...
2
votes
1answer
119 views

SQL Server Merge Replication Dummy Update issue

We have SQL Server 2005 SP4, using merge replication. We started getting this error when the subscribers try to replicate (not all of them but most): The process could not deliver dummy update ...
0
votes
0answers
42 views

How to efficiently synchronize MySQL slave with secondary mater?

I have a database setup with chained replication: +-----------+ +-----------------+ +----------+ | A: master | <-- | B: slave/master | <-- | C: slave | +-----------+ ...
0
votes
1answer
367 views

Excluding the standard MySQL databases from replication

I have a prod database, say appdb, and I only care about the data in that db. Is it safe to declare replicate-ignore-db for each of mysql,information_schema,performance_schema,test, as some tutorials ...
1
vote
0answers
51 views

Mysql Replication Master/Slave and Master/Master

Looking for some insight and opinions from some DBAs, as I've been tasked to look into using Master/Master replication for a single table in a database. We currently run mysql replication using a ...
0
votes
1answer
34 views

How to restart mysql slave node?

i have 8 slave servers and i need to restart one of them but in my.cnf file master-host, master-user etc. variables dont exists. So if i restart server as indicated here replication will start again?
0
votes
0answers
50 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 ...
0
votes
0answers
48 views

Ways to monitor Replication messages in SQL Server 2012

I have a question for the Replication gurus here. Replication is a massive evil (but absolutely necessary) in my company. What are the various ways to monitor replication performance. I know viewing ...
2
votes
3answers
166 views

Replicating tables for reporting purpose

We have 5 tables in a database on Server A that we would like to replicate to Server B for reporting purposes. We would like to create different indexes on the destination copy so we can get better ...
1
vote
0answers
33 views

Data mirroring suggestions

On my test environment, I have a SQL 2012 2-node physical cluster that accesses a common iSCSI storage on a separate Windows Server 2012 box. What options are there if I want to backup this storage to ...
0
votes
1answer
218 views

Native replication from Percona XtraDB Cluster to a standard stand-alone slave

I'm replicating from one node of a three-member Percona XtraDB cluster to a separate slave, using regular MySQL replication. The node is set to write binlog in ROW mode, with log_slave_updates=true ...
0
votes
2answers
57 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 ...
4
votes
1answer
2k views

How to configure replication from PostgreSQL (RDS) to vanilla PostgreSQL?

I have an Amazon RDS Postgres DB and I created a "replicator" user and granted it the "replication" privilege. db=> create role replicator login password 'something'; CREATE ROLE db=> alter ...
0
votes
0answers
67 views

Fast-Failover in Mysql

I need experts suggestion on this. I see fast-failover option is available from Mysql 5.6.5 onwards. I have a requirement asking to go for Mysql auto-failover of vip and database within Mysql itself. ...
0
votes
0answers
93 views

Error in configuration sql server replication

I am configuring replication for a sql server 2005 on win server 2003. I get this error: TITLE: New Publication Wizard SQL Server could not configure 'aaaa' as a Distributor. ...
0
votes
2answers
677 views

How to add an article to existing replication

This is the first time I am going to add tables to replication. I have outlined the below steps to add a new table to existing replication. Please correct me if I am wrong. The table is just created ...
4
votes
2answers
97 views

Masking or substring data while replicating data

I have a table that has some unencrypted data that needs to be replicated to another server. I want to do : Mask the data with an x except the last 5 characters e.g. xxxx12345 just replicate ...
0
votes
1answer
508 views

row-based replication with slave triggers

I'm replicating a prod MySQL database to an analytics one. I need to drop several tables with sensitive data from the analytics and also redact several columns of several remaining tables, replacing ...