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[Francois Mikus <question203668@xxxxxxxxxxxxxxxxxxxxx>]

Question #203668 on Graphite changed:
https://answers.launchpad.net/graphite/+question/203668

Francois Mikus proposed the following answer:
The way I see it you have two ways to do it:

Full copy, nicing the process and disk-access using rsync.

Or :

Have two servers with raids, and simply send your metrics to both servers.
Have a script that periodically(or after an outage) goes through the list of metrics

The script does two things: 
1 - On server A checks if the file exists on server B and does an rsync if missing
2 - if not run a whisper-merge to fill in ay missing values from A to B
3 - Do some type of QA and remove the backup file (or edit whisper-merge to not do a backup).

This backs up from A to B.

You can also do the same from B to A, but you have to really trust
whisper-merge...

This is simple, and covers most a large number of use cases.
Synchronisation is time delayed, but you have redundancy. Graphite
sprays requests to both sets of databases.

If anyone else has suggestions, I am also interested in earing the
answer.

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