PostgreSQL : Master-Slave replication strategy and solution for 3 servers.
We have currently 3 servers(X,Y,Z) running Debian X64, two of them host projects(Y,Z), which don't require that much database, as they serve more static content, but the third server(X) is largely...
View ArticleRandom IllegalStateException on slave (Solr 3.6.1)
We have a master-slave Solr set up and run live queries only against the slave. Full import (with optimize) happens on master every day at 2 a.m. Delta imports happen every 5 min for one entity and...
View ArticleSolrCloud update node by node after schema update
Is it possible to update one node by one in SOLRCluster so you after update of SOLR schema you will not have to reindex all nodes at once and have downtime of search? Current SolrCluster configuration...
View ArticleHigh Availibility Solution to send data to multiple locations
I inherited a very interesting environment and I'm tasked with finding and implementing High Availability/Disaster Recovery solution as soon as possible. Simply speaking our environment looks like...
View ArticleI can't create a transactional replication
I have two databases identically in two SQL Server 2014 instances. The problem is as follows. I can access from server A to B, I can create the publication in server A and access to that publication...
View ArticleCan't promote PostgreSQL warm standby server to start serving data
Scenario: Two CentOS 7 machines, with ips 10.0.2.15 and 10.0.2.4 Both running PostgreSQL 9.4.6. First one (10.0.2.15) as master, and second one (10.0.2.4) as slave, not listening for clients (just...
View ArticleI can't create a transactional replication [on hold]
I have two databases identically in two SQL Server 2014 instances. The problem is as follows. I can access from server A to B, I can create the publication in server A and access to that publication...
View ArticleSQL server is replicating to wrong subscriber
I have a publication which is intended to push data to a subscriber over the internet from a remote server to our onsite local subscriber but it ends up on a wrong subscriber.Here is the scenario:...
View ArticleIs MSMerge_History.time in GMT or local server time?
Is MSMerge_History.time in GMT or local distribution server time?
View ArticleIn Cassandra how simultaneous distributed writes maintain consistency?
There is a three node Cassandra cluster with replication factor 3 and consistency quorum with nodes X, Y, Z. So either of the three can be the coordinator. Assuming there are two simultaneous...
View ArticleReal-time Database replication
What are the options for database replication when minimal latency is required other that Peer-to-peer transactional replication? is Peer-to-peer replication the only one suitable for real-time...
View ArticleReplicate some SQL Server tables using SSIS
I have two SQL servers, one source SQL 2012 and one destination SQL 2005. All developers works on SQL 2012 and at 23:00, 10 tables are replicated to SQL 2005 using SSIS, so, the structure and the...
View ArticleFault tolerance in mysql servers
I have built an application as part of my UG thesis that uses mysql database (community edition). Now, my professor wants me, possibly out of his ignorance, to provide fault-tolerance to the data in...
View ArticleReplication with AlwaysOn Availability Group, Replication stops after primary...
I did all things as pointed i this tutorial, without errors: http://www.techbrothersit.com/2015/07/how-to-setup-replication-with-alwayson.html I works fine when I failover replicas from one to another....
View ArticleMySQL 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...
View ArticleIdentity management in Transaction replication with updatable subscription
I have migrated my publisher DB to new server yesterday. For migration what I did was removed subscriptions and publication completely backed up DB on which publication was configured restored DB to...
View ArticleNew Master-Master replication has stopped working
We're building a new MySQL server pair for high availability, and of course it's not like managing a single server. We're working with Ubuntu 14.04 LTS and MySQL 5.5.43 I had master-master replication...
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SQL Server : How to prevent Replication on Batch delete and allow on Daily...
I have a Transactional Replication running on SQL Server 2012. It replicates INSERT, UPDATE and DELETE. Now im facing a condition (for DELETE Statement) where it forces us to : Replicate only...
View ArticleMySQL - 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...
View ArticleReplication Issue - Changing the replication-do-db filter
I have a server that someone has setup which are acting as a master on both database. Since they have been configured as both master on the same database, changes one on end has caused all sorts of...
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