Inserts/updates are extremely slow with Merge Replication in SQL Server 2008
I got hired into a new company and they had merge replication already in place. They have had issues with it to the point I have to evaluate whether to keep it or replace it. The main issue is it takes...
View ArticleNon-Replicating commands from (master) Mysql 5.5.40 to (slave) MariaDB 10.0.19
CRUD replicates just fine. But we noticed that DB structure altering commands such as ALTER TABLE and/or adding/updating columns to a table and even creating new ones do not replicate to the slave at...
View ArticleMySQL multiple replication users
I have an environment of one Master server (Master A) and three slaves (Slave B, C and D) configured with an ID called "replicator". Unfortunately credentials for "replicator" user is missing (the guy...
View ArticleHow could duplicate entry on unique key happen if only one master is active?
Say, I we have master-master replication with only one master active at a time. We have users table: create table users ( id int auto_increment, email varchar(255), primary key id(id), unique key...
View ArticleMysql 5.7 replication problem: slave_io_running and slave_sql_running all...
Here is my env: MYSQL Version: mysql Ver 14.14 Distrib 5.7.13, for Linux (x86_64) using EditLine wrapper Result of show master status on master: *************************** 1. row...
View ArticleHDFS replication and data distribution
I have a Hadoop cluster with 4 DataNodes. I am confused between the two issues : data replication and data distribution. Suppose that I have a 2 GB file and my replication factor is 2 & block size...
View ArticleCan you replicate a specific database or table using Amazon's RDS
We are using Amazon RDS and we have a MASTER replicating to a SLAVE. We want to create a new slave that will only replicate specific databases or tables from the master. By default RDS simply just...
View ArticleMySQL 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...
View ArticleSQL Server Replication - FTP Snapshot: Policy requires SSL
SQL Server 2014 on both Publisher & Subscriber. Publisher & Subscriber are across the internet. Replication is Transactional Replication Error messages: The process could not connect to FTP...
View ArticlePostgreSQL 8.4 replication of more than 100 tables
I am facing a problem with PostgreSQL version 8.4. I need to create an slave machine but when I look to all tutorials of slony or londsite its saying I will need to specify the tables that I want to...
View ArticlePostgresql replication: using 2 BDR with/and 2*n UDR or pglogical (some kind...
I plan to run a replicated Postgresql over multiple sites. There should be two servers on every site. At the main site they should run in BDR mode. And between the sites (to the other servers) I need...
View ArticleMySQL Zombie Dump threads
I'm getting the below constantly logged on my master mysql server. I've googled this to death but with no luck. Can anyone give me any advice. 2016-07-21T08:17:43.765005Z 41323 [Note] Start binlog_dump...
View ArticleIs it good practice to have multiple keyspaces in Cassandra?
I've Cassandra configured on Amazon EC2 having 3 nodes(instances) in single cluster. Now what I want to do is give some space on Cassandra to my clients by creating separate keyspace for each in a...
View ArticleHow to know if MySQL replication is working?
I am replicating from a MySQL v 5.5.50 master, to a MySQL v 5.5.46 slave hosted in RDS. I've followed the AWS documentation on how to do this to the letter, got the dump file imported into the slave...
View ArticleMySQL 5.7 Multi Master Multi Source Replication issues after mysqld restart
I've a multi master & multi source replication setup working perfectly fine. M1 -> M2 || M1 -> M3 M2 -> M1 || M2 -> M3 M3 -> M1 || M3 -> M2 As soon as I restart mysqld I'm missing...
View ArticleTraffic manager and data replication
In case, I have my applications running in 2 different regions. If i use a traffic manager to route my packet to nearest region, From an high availability perspective, How do i manage the manage data...
View ArticleSQL Server Replication Fail on Single Subscriber
I have a master DB that has been replicating out to 12 remote SQL Express instances for about a year now. Suddenly a few days ago, one of the remote DB's stopped receiving updates. I tried...
View ArticleHow to create a Pull Subscriber (SQL Server Replication) where the...
Let me explain my situation: I have a two servers: A & C and a workstation B. I have successfully created SQL Server Merge Replication using Pull Subscription (through IIS) between server A &...
View ArticleSQL Server Replication Fail on Single Subscriber
I have a master DB that has been replicating out to 12 remote SQL Express instances for about a year now. Suddenly a few days ago, one of the remote DB's stopped receiving updates. I tried...
View Articlehow to deal with pg_replication lagging on slave
I have db cluster running postregs 9.2 on master as well as slave. But intermittently I am getting this in error logs, Slave db-foo: 52C65040 is behind from Master db-bar: 53946000 by KB: 13187 I came...
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