Thin Client and Virtual Machines Thread, iSCSI LUNs or Volumes and multiple access from different Hyper-V Host servers in Technical; I have a Dell Equallogic PS4000 iSCSI SAN which is devided up into multiple volumes or LUNS. One of these ...
5th June 2010, 10:32 AM #1
- Rep Power
iSCSI LUNs or Volumes and multiple access from different Hyper-V Host servers
I have a Dell Equallogic PS4000 iSCSI SAN which is devided up into multiple volumes or LUNS. One of these volumes is called 'VMs' for Virtual Machines which host the .vhd files that make up my Virtual machines on three Hyper-V Host Servers.
My experience so far shows me that whilst I can access a single same volume from the three Hyper-V hosts it likely ends in curruption of files so I have resorted to creating three volumes - one for each Hyper-V Host.
This appears to work fine (so far) however it brings complications with high availability and moving hosts etc.
Is it possible to configure the iSCSI SAN or Host servers so that all of the vhd files reside on the same volume with simultaneous access from all, as this will make fail-over and high availability easier to achieve. Currently I need to change the access rights on the SAN to stop one server and permit another when vm's are moved between hosts.
I am happy with the concept of MPIO from multiple NICs on each Host server but this does not help in the above situation.
IDG Tech News
5th June 2010, 10:38 AM #2
Last edited by SYNACK; 5th June 2010 at 10:41 AM.
Reason: added links
2 Thanks to SYNACK:
apaton (5th June 2010), torledo (5th June 2010)
5th June 2010, 11:26 AM #3
- Rep Power
Thank you. An excellent article. Very useful.
Do you think I would be foolish to create virtual cluster servers with direct access to the SAN using iSCSI initiators from the VM's? This would leave me with 3 three Host servers instead of 1 if I use two of them for the cluster servers?
5th June 2010, 11:35 AM #4
the cluster servers are still available as host servers, the only difference is they can now share a lun for storing vhds. they also have the benefit of being able to to do live migration.
5th June 2010, 02:32 PM #5
- Rep Power
Thank you! Time to play again on Monday with this I hope.
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