capre

Cross-Server Data Replication

npm install capre
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Capre

Ultra-Simple utility to facilitate data replication.

Capre doesn't care what data you're replicating, or how you want to handle transferring the actual data, it solely keeps track of what unique identifiers changed between two points in time.

Motivation

Capre exists to facilitate data replication across the many disparate systems one might find in business environments and where syncronisation latency is not a priority.

The primary component of any replication system is knowing what needs to change to bring a slave system up to date. This is Capre's sole responsibility.

You tell Capre something changed, and it will notify (via push or pull) any connected slaves that particular something changed. It is now up to the host and client implementing capre to actually facilitate any data exchange.

A typical exchange might go like so:

Two business systems, one is connected to HR's primary user input mechanism. This system runs the capre server and becomes the 'master'. Each time a change is made in the HR system

Another system wants to access the master's User data, it becomes the 'slave'.asks to sync with it. Since the master has not seen this slave before, it will send down the ids of every current User in the system. The slave can then use these ids to query the master application for the actual data.

Later, some new users are created in the HR system, and these ids are marked as changed in Capre. The next time the slave system connects to the master, the slave exchanges some data and then the README was over.

TODO

  • README
  • Transaction support for DB performance

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What is 'Capre'

It means 'Goats' in Latin. Goats.

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