What is the difference between DISTRIBUTE BY REPLICATE and HASH in Postgres XC?
According to the SourceForge page for Postgres-XC, while creating a distributed table in Postgres-XC, it can take the attribute DISTRIBUTE BY with: DISTRIBUTE BY REPLICATION: Each row of the table will...
View ArticleHow to use Replication in SQL Server 2008 R2 to handle offline mode push data
I want to push SQL Server table data from one server to another in time when insert or change data in publisher and when connection lost and get back the data transfer. Can it be with replication, if...
View ArticleBidirectional Replication Push and Pull with SQL Server
Please bear with me, I'm a developer working with a client without access to a strong DBA. I have a question about bi-directional replication with the following setup and requirements: MSSQL Server...
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Manual sql failover machine with replication
I hope this is the correct place to ask this question. We recently experienced one of our virtual machines being offline for 3 days due to issues in the data center hosting it. This quickly brought us...
View ArticleReplicate update statement as Insert in Mysql 5.6
I want to replicate all update statement from Master as a Insert at slave end. 1. Is it possible like in SQL Server ? 2 If so , how ? I want to do it because , if any record on master is updating and...
View ArticleCheck if Replication Enabled
What's the easiest way to check if replication is enabled in a SQL 2000, 2005, and 2008 compatible format? Don't need any status info...just to know if it's enabled for a DB. I need this because I want...
View ArticleMySQL Delete Rows from Slave
I want to truncate the majority of data on a slave such that it only has the most recent records. I'll eventually demote the current master, making it a read-only archive, and promote the truncated...
View ArticleData synchronization across multiple databases
I have a Django application which uses PostgreSQL as a database. The application stores hierarchical data. It is like a warehouse management system with multiple branches and hierarchy. The current...
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MySQL multi-Master replication topology
Disclaimer: I've never worked with replication before, but I'm doing all my research. Not really having a bunch of in-depth knowledge about MySQL makes a lot of the documentation hard to understand. We...
View ArticleData Replication error in Hadoop
I am implementing the Hadoop Single Node Cluster on my machine by following Michael Noll's tutorial and have come across data replication error: Here's the full error message: >...
View ArticleMySQL replication using a lot of IO
I'm having big troubles on a database pool I've setup recently. There is a master, and 4 slaves replicating one DB. All using MyISAM engine. Thing is, during the replication period (when the slave is...
View ArticleHow to generate replication snapshot without locking tables
When I reinitialize subscription and generate new snapshot it locks all tables and makes the database unusable for a very long time (never waited it out). Is there anyway to do this without locking?
View ArticleReplication with Sequential and Causal Consistency
There are two processes access the shared variables x,y, and z. Each process accesses a different replica of the store used to hold these variables. value of x,y and z is 0 initially. Process 1: x = 1;...
View ArticleMySQL / DRBD / Pacemaker on EC2
I am trying to setup DRBD/MySQL/Corosync/Pacemaker on AWS EC2 instances, though I am not sure if it will work since how to integrate VIP is a problem for me. Anyone have any thoughts on what to do ?
View ArticleHow to have remote standby PostgreSQL server in different location (AWS)?
We have a primary PostgreSQL 9.4 server running multiple instances in our DC. It is using Continuous Archiving via WAL-E out to AWS S3. I would like to have a hot/warm standby server in our VPC within...
View ArticleDemoting a MySQL Master to Slave
I recently had to fail my master over and promote a slave due to a network outage. All of that worked fine. Now that the network is back, I'd like to add my old master as a slave of the new master....
View ArticleDemoting a MySQL Master to Slave
I recently had to fail my master over and promote a slave due to a network outage. All of that worked fine. Now that the network is back, I'd like to add my old master as a slave of the new master....
View ArticleElasticsearch replication between data centres
Is the Elasticsearch replication method reliable enough for instances in two different data centers? Is production ready and did anybody experience some problems with it?
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sql server replication - how to get combination of values from a binary(8)...
I am using the table sysschemaarticles to collect information in my transactional replication. It is used for a variety of things including adding new articles and finding out who are the subscriber...
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sql server - NoSync subscriptions will need to be dropped and recreated
I am having this error message from the sql server replication monitor: Error messages: The subscription(s) have been marked inactive and must be reinitialized. NoSync subscriptions will need to be...
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