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тАО02-22-2011 04:10 AM
тАО02-22-2011 04:10 AM
Re: BC License ???
** DON'T DO THAT. **
Many file systems cannot be shared concurrently between two servers.
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тАО02-22-2011 06:11 AM
тАО02-22-2011 06:11 AM
Re: BC License ???
If you present the original Vdisk to a second (or additional) server that is not clustered with the first one(s), the original Vdisk WILL be corrupted.
Scroll up and re-read my reply about "The EVA is not a file server...".
Note: While I am an HPE Employee, all of my comments (whether noted or not), are my own and are not any official representation of the company
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тАО02-22-2011 06:40 AM
тАО02-22-2011 06:40 AM
Re: BC License ???
I have 3 Host for VMware, and I presented some Vdisks to 3 of them as a shared storage ! How is it possible ?
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тАО02-22-2011 06:57 AM
тАО02-22-2011 06:57 AM
Re: BC License ???
Note: While I am an HPE Employee, all of my comments (whether noted or not), are my own and are not any official representation of the company
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тАО02-22-2011 08:56 AM
тАО02-22-2011 08:56 AM
Re: BC License ???
> vCenter Server software provides the clustering
Sorry, but that is not correct (with my definition of file system 'clustering'). VMFS volume consistency is ensured, because each VMFS driver serializes meta-data updates with SCSI reservations. That works completely independend from a vCenter server.
Are we talking about EVA Virtual Disks or Virtual Machine VMDK container files? The latter cannot be shared among VMs.
You need to use Raw Device Mappings (RDMs) *and* a shared filesystem with the guest OSes (no NTFS / Linux extN)
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тАО02-22-2011 09:04 AM
тАО02-22-2011 09:04 AM
Re: BC License ???
vmfs and ESX in general operates as a clustered file system.
"As I understand it, the vCenter Server software provides the clustering between the Servers, allowing them to share vdisks for the guest OSes."
vCenter has nothing to do with the cluster except to initially set up clustering and manage the environment. Once the cluster is configured, you can theoretically remove the vCenter server, and most everything will continue to run. Sure, there will be a few features that 'pause' cause they use vCenter to operate, but an HA cluster does not need vCenter to "operate" properly.
Steven
HP Master ASE, Storage, Servers, and Clustering
MCSE (NT 4.0, W2K, W2K3)
VCP (ESX2, Vi3, vSphere4, vSphere5, vSphere 6.x)
RHCE
NPP3 (Nutanix Platform Professional)
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