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April 9th, 2015 13:00
Mapping to VMware Clusters
Is it possible to map volumes to more than one cluster without possibly corrupting data? We currently have 5 volumes that are mapped to our cluster of 5 ESXi hosts. We are adding 2 more hosts, so added another cluster for those hosts. I was wondering if I could map those 5 volumes to both clusters, or do I need to create all new volumes for the new cluster?
Thanks for your help!
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DELL-Daniel Ca
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April 10th, 2015 08:00
Hello, jyoung709.
So, basically mapping a volume to 2 different clusters would the same as mapping to 2 hosts not in a cluster. It would result in corruption. The beauty in clustering is that there is a 'moderator' (if you will) that manages when a read or write hits a disk. The hosts in the cluster are managed by the software that allows them to 'take turns' so to say, so there is not simultaneous writing. (this is a crude explanation, but serves the purpose)
In your scenario, each cluster is unaware of the other, and is not managed by said moderator. If there were a 'cluster management system' for the clusters? ...sure. but, I have my doubts that it's out there.
I hope this helps.
Let me know if you have any questions.