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Question by jose r. · Jul 02 at 09:28 AM · administration installation

calculate size NFS for backup cluster

Hello.

we have configured the cluster backup in a customer. We have consulted the reference documentation (https://www.dynatrace.com/support/help/shortlink/managed-cluster-restore); but it is not clear to us how to calculate the size in NFS.


Could anbody help us how calculate the space we need to allocate in NFS for the backup?

There are 3 nodes like this:


thanks in advance.

Jose A

1562059593986.png (56.0 kB)
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Answer by jose r. · Jul 02 at 10:54 AM

Hi Patrick.

So, to confirm, if I have 3 nodes like the one in the image, I have to calculate it like this:

the sum of the metrics storage (cassandra) on all the nodes multiplied by 20% -> (69.9gb * 3nodes) * 20%

+

twice the size as compared to storage on disk of the elastic search storage -> 2 * 7.0gb


That's correct?


Thank you

Jose A

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avatar image Patrick H. · Jul 02 at 11:05 AM 0
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The number of nodes is not factored in for the metric storage, so you can remove the *3

The rest looks good, you might want to give it a bit more space, depending on the time the environment has already been running.


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Answer by Patrick H. · Jul 02 at 10:13 AM

You can find the information about backup sizes in the documentation.

Typically, it's the sum of the metrics storage (cassandra) on all the nodes multiplied by 20% + twice the size as compared to storage on disk of the elastic search storage.

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