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CSV - all traffic through coordinator node
CSV - all traffic through coordinator node
- Hi everyone!
I have a problem with my 2008R2 cluster. My CSVs work for live-migration, but the way the nodes access the CSVs seems not to be the way it should be, because all traffic seems to go through the coordinator node. My configuration looks as follows:
2 networks for cluster hb + live migration
2 networks for iscsi
1 management network for the physical node
1 network for the VMs
If I now copy a VHD to a node that is not the owner of a LUN, all traffic goes through one cluster network to the coordinator node and from there over the iscsi interfaces to the storage. Why and how can I prevent thsi from happening.
I already had a look if the "redirected access" is active, but it isn't.
This is heavily reducing the performance of the cluster, so I am happy for any advice.
kr,
Andreas
Answers
If I now copy a VHD to a node that is not the owner of a LUN, all traffic goes through one cluster network to the coordinator node and from there over the iscsi interfaces to the storage.
The multiple node direct disk access to CSV is only for VHD accessed from a VM/Hyper-V, and not any other application or file (system) operations.
as you copy your application requesting access is Explorer (or copy.exe) but not a Hyper-V, hence the coordinator node does not allow direct access, but only access through the coordinator node itself.
Hope this explains it
Edwin- Proposed As Answer byEdwin vMierloMVP, ModeratorThursday, October 29, 2009 4:50 PM
- Marked As Answer byEdwin vMierloMVP, ModeratorFriday, October 30, 2009 11:06 AM
All Replies
If I now copy a VHD to a node that is not the owner of a LUN, all traffic goes through one cluster network to the coordinator node and from there over the iscsi interfaces to the storage.
The multiple node direct disk access to CSV is only for VHD accessed from a VM/Hyper-V, and not any other application or file (system) operations.
as you copy your application requesting access is Explorer (or copy.exe) but not a Hyper-V, hence the coordinator node does not allow direct access, but only access through the coordinator node itself.
Hope this explains it
Edwin- Proposed As Answer byEdwin vMierloMVP, ModeratorThursday, October 29, 2009 4:50 PM
- Marked As Answer byEdwin vMierloMVP, ModeratorFriday, October 30, 2009 11:06 AM
- Hi Edwin!
Thx for your help first of all!
Just to get this right: Only load from within a VM can access the LUN directly?! So any load created outside a VM will always go through the coordinator node?!
kr,
Andreas - Yes
