Why is data replication important in a NoSQL database?
Data replication is a very important part of keeping the database up and serving queries. Like many NoSQL database authors, we decided to keep R=3 copies of each piece of data in the database, and not use RAID to improve reliability.
Can You replicate 2008-> 2017 transactional replication?
Since 2008 -> 2017 transactional replication is not supported, I am trying to replicate in a second step from the 2014 server. However, I cannot figure out how to get the 2014 server to recognize the 2017 server as the distributor for its publications, while still acting as the distributor for its subscriptions.
Can a 2008 Server be replicated to a 2017 server?
I need to replicate this data to a 2017 server, which would require a 2017 distributor. Since 2008 -> 2017 transactional replication is not supported, I am trying to replicate in a second step from the 2014 server.
Is there push transactional replication in SQL Server?
We currently have a push transactional replication setup from a SQL Server 2008 R2 database (publisher) to another 2008 R2 (subscriber). The publisher is controlled by a partner organisation that we work closely with, but we have little control over their infrastructure (other than the replication).
When to use master master replication vs master slave?
Master-master let’s you bring the canonical data source as close as possible to every content owner/creator in that scenario. In master-slave architectures, everyone must be able to reach the canonical authoritative source or risk (at least) having their content overwritten or not be writable at all.
How many copies does a NoSQL database need?
Like many NoSQL database authors, we decided to keep R=3 copies of each piece of data in the database, and not use RAID to improve reliability. The key goal we were shooting for was a database which degrades gracefully when there are many small failures over time, without needing human intervention.
How many replications are needed in a are = 3 cluster?
In an R=3 cluster, a single disk contains chunks of data replicated to other disks elsewhere in the cluster. For rebuild purposes, it’s nice to have at least 10 chunks on a disk, and it’s also nice for the 2 replicas for these 10 chunks to be on as many servers as possible.