Oracle DB (Intranet) ->(DMZ) Data Replication through a unidirectional...
I have 2 Oracle 10.2.0.4 servers, one located within our internal intranet network, and another located in our DMZ network for public access. For security reasons I am unable to open up bidirectional...
View Article"Copying" third party databases into central mySQL and keeping...
I have a question which is what I believe to be quite complicated and would like to see what experts like yourselves think about my solution. Problem: I am collecting data from a number of third...
View ArticleBest approach for archiving transactional data in MySQL 5.5
I'm new to MySQL. I'm looking into setting up a MySQL 5.5 instance on Amazon's RDS. I have worked with DB2 in the past as a developer, but not as a DBA. I have a requirement to store transactional (not...
View ArticleRMI replication with unicast of ehcache does not work
Here is my ehcache configuration xml on the 10.0.110.134 machine: <cache name="sessionIds" maxElementsInMemory="5000" eternal="false" overflowToDisk="false" timeToIdleSeconds="0"...
View Articleignore query in mySQL replication if it is taking more than n seconds to execute
Suppose I am replicating master to slave and during that process if my query is taking more than n seconds to execute then I need to ignore that query to replicate in slave. I am using SHOW PROCESSLIST...
View ArticleHow to recover a Standby in Postgres Slot Replication
I am using 4 nodes of Postgres 9.5 server in a Slot replication set up. One node is acting as a Master and three other nodes as Standby nodes. Everything ran fine for few days and suddenly one node...
View Articlemerge replication taking longer with "Downloaded snapshot file...
I have a merge replication on sql server 2012 with five subscribers. I reinitialised one of the subscribers to replicate all the data from the publisher but It takes the whole day downloading the...
View ArticleTrans Replication and Always On Listener Group Name
We have currently (SQL Server 2012 STD) which is continuously replicating from 8 different database server for reporting purpose to server which is on SQL 2008R2. We would like to create an Always On...
View ArticleProcessing large mongo collection offsite
I have a system writing logs into mongodb (about 1kk logs per day). On a weekly basis I need to calculate some statistics on those logs. Since the calculations are very processor and memory consuming I...
View Articlepgpool2 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...
View ArticleMySQL Master-Master Replication not syncing
SETUP: I have a WAMP MySQL Master-Master replication setup on 2 machines with sync_binlog=1 for safety. Machine config: Windows Azure Standard 2: 2 core, 4GB RAM, Windows Server 2008, MySQL 5.6.12,...
View ArticleReplication 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...
View ArticleSQL 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 Server...
View ArticleIs Referential integrity between tables mandatory for custom conflict...
I have a database which have multiple tables but these tables have not any relationship define(Referential integrity) in database. They are related to each other but maintained by trigger and...
View ArticleWhat's the best setup for a MySQL multi master replication for a POS in a...
We're in the process of implementing a point of sale (POS) solution where we have heavily modified an existing open source POS. The original POS was never created with replication/synchronization...
View ArticleSQL Server Transactional Replication Distribution Database not keeping up
We have following setup at the moment: 8 Cluster servers (SQL Server 2012 Standard Edition) talking to 2,000 store servers in the field via Merge Replication. The 8 servers are replicating to a...
View ArticleCreating a read only replica of SQL Server database for reports
I've faced a problem when my .Net web application is running slow, even when I've optimized all queries. As it turned out another developer, who is making reports runs a bunch of non optimized queries...
View ArticleIn a Serial 3-Server Replication Scenario (A>B>C), can server B...
This is in the service of a live migration, where server A has heavy performance and space demands, so I would like to keep down the amount of disk-space used by logs - let's say expire_logs_days = 10....
View ArticleMulti master replication with MySQL and Django
I am working on scaling out a webapp and providing some database redundancy for protection against failures and to keep the servers up when updates are needed. The app is still in development, so I...
View ArticleThe process can not access the file because it is being used by other process
I have publisher and distributor on the same machine with 2012 sql server. Created a new subscription and it started downloading the snapshot. After a few snapshot downloads, it throws the following...
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