SQL Server Log File Is Huge
Currently my db logs for my production SQL Server 2008 R2 server is growing out of control: DATA file: D:\Data...\MyDB.mdf = 278859 MB on disk LOG file: L:\Logs...\MyDB_1.ldf = 394542 MB on disk The...
View ArticleWhat are the Pros and Cons of modelling a ready only query system with...
I have the following scenario where an SQL Server database (D1) is being replicated to D1_p (on-premise SQL Server). I have another on-premise oracle database (D2) being replicated to D2_p (on-premise...
View ArticleCross db flavor replication MySQL / MariaDB / Percona
I have Percona MySQL running in production. We would like to Migrate to MariaDB server. One of the solutions that came to my mind was using master-slave replication and then master swap technique. Can...
View ArticleSame ID error when I try to replicate databases
I'm not able to replicate a database from a live server to local server(which is accessible from outside). I got this error on master server Fatal error: The slave I/O thread stops because m aster and...
View ArticlePostgresql Chained Slaves and Slave Promotion
So I have a setup like Master -> Slave1 -> Slave2. Slave1 replicates from Master and Slave2 replicates from Slave1. If I promote Slave1 to master is it possible for Slave2 to continue replicating...
View ArticleWhere to look for Agent history in Replication?
In SQL server 2008R2 replication configuration, "agent history cleanup distribution" job by default runs every 10 minutes and deletes any historical data older the 48hrs. If I increase the retention...
View ArticleSpring Data Mongodb - single configuration for standalone mongo and replicaset
I started out with a single mongo instance as my database, configured in spring xml: <mongo:mongo host="localhost" port="27017" /> Recently, I changed my configuration to use a 3 node replica...
View ArticleClik here to view.
How to implement sql replication when subsciber cannot acces the publisher
I have 2 servers Server A (Publisher) and Server B (Subscriber) However server A can access Server B but Server B cannot access Server A. There are no VPN between these servers Server A can access B...
View ArticleRelationship between data independence and database schema
What is the relationship between data independence and database schema? I know both of them separately. But I don't know how to explain the relationship of these two.
View ArticleSQL Server transactional replication distributor
If I have a SQL Server 2012, with two databases, both publishers, replicating to a bunch of subscribers. Can each database go through a different distributor? Is the publisher the server or the...
View Article"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 possible...
View ArticleWhy use GTIDs in MySQL replication?
When it comes to database replication, what is the use of global transaction identifiers? Why do we need to prevent concurrency across the servers? How is that prevention achieved exactly? I tried to...
View ArticleMariaDB Galera Cluster Replication problems
I set up a galera cluster with 2 nodes and an arbitrator. The cluster starts up correctly, firewall rules exist to pass traffic on all ports needed for the replication (including rsync) and a new...
View ArticleConfiguring slave from EC2 master to Amazon RDS slave
I am configuring replication from EC2 master to Amazon RDS instance. After starting the slave, I don't see any errors but I see slave_IO: _thread is connecting. Master version:5.6.23 Slave...
View ArticleCassandra source -> sink replication
Is is possible to organize one way replication between data centers (DC). Let's say we have two DCs: A and B. I want all data written to nodes in DC A to be copied to DC B, but none of data written in...
View ArticleSyncing writes and not deletes - mongoDB
Is it possible to have a secondary instance of mongoDB which syncs all the write operations to the database and not the delete operation? I'm looking for this solution so that I have a backup even if...
View ArticleBi-directional replication for the same MySQL table
AppA stores/retrieves data from dbA.tableA AppB stores/retrieves data from dbB.tableA tableA definition is the same across these databases. To start with dbB.tableA was copied from dbA.tableA (assuming...
View ArticleWhich one to use? InnoDB Replication or MySQL Cluster?
I am building a url shortener and I use InnoDB as the storage engine for link data. I will start with a single VPS containing both application instance and MySQL database instance on the same Virtual...
View Articlemongodb replication node stuck at “STARTUP2” with optimeDate as 1970
i have just setup replica sets with three nodes . the third node is stuck at stateStr STARTUP2 with "optimeDate" : ISODate("1970-01-01T00:00:00Z"). However its showing no error message. Is this...
View ArticleRun MySQL replication by schedule or on demand
I have a master-slave replication currently configured. I know this setup runs real time. Is it possible to sync only the databases on schedule (daily or weekly) or by demand? Thanks!
View Article