database-replication

I have a publisher database A and I have two subscriber databases B and C that subscribe to A. My application resides locally at sites B and C and through replication, changes at B and/or C are replicated to each other. The problem is since 31 January 2019 C stopped subscribing to A and the IT guys at site C didn't know about it (no alerts). The bigger problem is that during this time, people using the application at B have been entering data which is replicated back to A. At the same time, people at site C have been adding data to database C which was not replicating back. If I reinstate a

I am looking for a tip how to synchronize data from a local firebird database into online db? Few comments: On a local machine I use sales software which keeps data on firebird db. There is an internet connection, but I want to avoid direct db access (as the PC after 9pm is being turned off). I would like to create an online app (based on foundation + php + database) in which I will be able to view daily sales and explore past data. In local db, I will need to pull data from several different tables, and I would like to keep them in online/final db as a single table (with fields: #id,

We have a app that is hosted in US and the EU. For great performance we will host a datastore instance on both locations. Now is our question how we can replicate the data from the US datastore to the EU datastore? Or is it no matter where we store the data from technical view? Dan Cornilescu There is not such thing as multi-location GAE apps (at least not yet). The app's unique location can be selected when the app is created and cannot be changed. See App Engine - How to create project in region us-central and gae app moving to eu-datacenter or re-opening An important note from Creating a

In MySQL DB server we have schema named test . The schema has table named users . The table users not used in any place by rails application. The only place the entry for users found is in schema.rb. The users tables has some data stored and data gets inserted by another java application which runs on some other server. The rails application makes API call to JAVA application via HTTPs and retrieves the data for usage if needed. Daily the MySQL Master DB gets replicated to Slave server. During replication the bellow query getting logged in slow logs and its making replication lag. root

I encountered the following warning after converting a mongodb replica set to a stand alone server. I did rs.remove('host') and removed the replSet arguments when starting the mongo db. [root@sam ~]# mongo MongoDB shell version: 2.4.3 connecting to: test Server has startup warnings: Tue Jul 9 17:18:46.076 [initandlisten] Tue Jul 9 17:18:46.076 [initandlisten] ** WARNING: mongod started without --replSet yet 1 documents are present in local.system.replset Tue Jul 9 17:18:46.077 [initandlisten] ** Restart with --replSet unless you are doing maintenance and no other clients are connected. Tue Jul