Add additional node to cluster

[DCIM_Support]

This question was originally posted on DCIM Support by David on 2016-04-13

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Hi Support,

We have been asked the following question from a customer who may have need to add an additional node to their existing DCO 7.5 cluster:

1 - Is an additional HA node license required (1 additional per node)? - Think I know this but just to check...

2 - If a different hardware configuration where used for an additional node with a more recent processor (different CPU / speed) was used, will this cause any issues with the build?

3 - Any other considerations here - can an additional node be added to an existing cluster without need to backup / rebuild the whole system from new?

Thanks,

David

(CID:105471052)

[DCIM_Support · Accepted solution]

This answer was originally posted on DCIM Support by Martin Kamp Jensen on 2016-04-14

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1) Yes, a HA license covers one (1) node. Please reconsider your setup if you are planning to use more than 2 nodes in a cluster. At least you may want to get in touch with us regarding your needs and plans such that we can provide assistance. Maybe what you want/need is 2 nodes in a cluster plus an additional node running as a disaster recovery node. See Setting up a Clustered Environment for information on how to add an additional node.

2) There is nothing preventing you from using nodes with different configurations. However, you should make sure that the slowest node is able to handle your needs. Otherwise, you may experience bad performance when the slowest node handles requests and acceptable performance when the fastest node handles requests, leading to a poor user experience. Normally, when customers set up a cluster, they use identical hardware for all nodes.

3) You can add additional nodes to an existing system without having to "rebuild" it. Of course I will recommend that you perform a backup before making changes to your system to be safe.

(CID:105471098)

[DCIM_Support]

This comment was originally posted on DCIM Support by David on 2016-04-14

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Thanks Martin

(CID:105471150)

[DCIM_Support]

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