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From Jabbar Azam <>
Subject Re: Backup solution
Date Thu, 14 Mar 2013 21:22:43 GMT

If the live data centre disappears restoring the data from the backup is
going to take ages especially if the data is going from one data centre to
another, unless you have a high bandwidth connection between data centres
or you have a small amount of data.

Jabbar Azam
On 14 Mar 2013 14:31, "Rene Kochen" <> wrote:

> Hi all,
> Is the following a good backup solution.
> Create two data-centers:
> - A live data-center with multiple nodes (commodity hardware). Clients
> connect to this cluster with LOCAL_QUORUM.
> - A backup data-center with 1 node (with fast SSDs). Clients do not
> connect to this cluster. Cluster only used for creating and storing
> snapshots.
> Advantages:
> - No snapshots and bulk network I/O (transfer snapshots) needed on the
> live cluster.
> - Clients are not slowed down because writes to the backup data-center are
> async.
> - On the backup cluster snapshots are made on a regular basis. This again
> does not affect the live cluster.
> - The back-up cluster does not need to process client requests/reads, so
> we need less machines for the backup cluster than the live cluster.
> Are there any disadvantages with this approach?
> Thanks!

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