MongoDB Replica Set Failure
Some background I had an issue with my replica set the last 24 hours, where the members could not connect to each other, and I got errors such as; could not connect to .... the machine actively refused...
View ArticleTungsten replicator-data doesn't replicate from master to slave
I configured a master slave replication using tungsten replicator with mysql as master and mongodb as slave.I followed this post of data charmer to set up the replication.I am able to configure all the...
View ArticleMinimizing downtime during MariaDB Replication Setup
I have the task of setting up MariaDB (10.0) replication from a master running in a datacenter to a slave running out in an AWS VPC. Reading up on the instructions on Setting Up Replication - MariaDB...
View ArticleA stored procedure failed to execute. Troubleshoot by using SQL Profiler
I have a merge replication setup over five subscribers with a central publisher on windows server 2012 and windows server 2012. I run into the following error on one of the subscribers Message: The...
View ArticleIs it possible to mysql master act as slave at same tame?
Im facing the following situation: We have master server replicating 3 tables of one database to 6 slaves. The replication is up and running fine. But now, we also want to have the data from another 2...
View ArticleWhat is the sync time from master to slave in a mariadb setup?
I am trying to find out how long it takes for data to be synced between the master database and the slave database in a master-slave replication.
View ArticleAccidentally executed reset master on the live server
Turns out I have called RESET MASTER; accidentally on the live server. The slaves stopped replication now because they can not find the expected bin log files on the master. Is there a way to continue...
View ArticleCan a slave with a dynamic ip update the master
How can I setup mySQL replication in such a way that a slave on localhost with dynamic IP can update the master as well as get updates from the master which has a static IP. The slave will not be...
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Replication Lag on Postgres AWS RDS Service
We have a single master/single streaming replica Postgres 9.3 db on AWS. The load is not terribly high - this is a development/staging environment. (The production shows similar metrics). Point is the...
View ArticleDatabase: One table or many
I am working on a project of classified ads site. I have 12 main categories, and their items are 142, Like vehicles have cars, scooters, bikes, etc. Mobiles Phones have mobiles, tablets, accessories....
View ArticleMySQL replication - invalidating query cache entries (table)
We lately mved to MySQL V5.5 on CentOS release 6.7 with master and 2 slaves. Since then the replication process lags a lot behind the master with the line in the process list of: invalidating query...
View ArticleMake RavenDB stop looking for replication
I’m using NServiceBus 3.6.1 with RavenDB 2.0.2375. While starting it I get the following: Exception thrown: 'System.Net.WebException' in System.dll Additional information: The remote server returned an...
View ArticleMySQL replication - invalidating query cache entries (table)
We lately moved to MySQL V5.5 on CentOS release 6.7 with master and 2 slaves. Since then the replication process lags a lot behind the master with the line in the process list of: invalidating query...
View ArticleSlave Waiting to reconnect [on hold]
I have added new slave host to master for replication, but missing some of the parameters. mysql> show slave status\G *************************** 1. row *************************** Slave_IO_State:...
View ArticleFinding differences between a master and slave when pt-table-sync fails
I have a table that's showing some differences on a master and slave according to pt-table-checksum (PTC). I've found some verifying differences beyond that. Certain tables in the mix have composite...
View ArticleWhich DB for multi user, multi platform, per record/field ACL, variable schema?
Yeah. Another one of those questions. But with all that is out there, I loose track and choosing the right system greatly influences wether you can work on what you love or work around what appears...
View ArticleShould a MySQL slave used for backup also be used to service read-only...
Based on best practices, I'm wondering if we should have at least one slave that's used solely as a backup server, without servicing any forward-facing requests from users. For example, if we have a...
View ArticleMariaDB Galera Cluster Replication
Does the replication between an async slave connected to a master withing the cluster affect the performance of the master in the cluster?
View ArticleWhat service that lets you create records/data into an immutable database...
I'm not sure if this exists or not, but is there a database storage system that is immutable, whereby it cannot be erased or be altered without someone knowning? Use case would be for public data that...
View ArticleHow should we be alerted of failures in the SQL replication distribution...
When setting up SQL replication, the default retry count for the replication agent job step is 2147483647, retrying every minute. This means that if replication fails, the failure notification for the...
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