2 host sharing same LUN w/o data refreshing in real time

Question

I have 2 hosts (VM), in a storage group, sharing a single LUN. I understand that this goes against performance best practices but I have a stubborn administrator who insists that it be this way. When a server (host) writes to the LUN, the other server does not see the data that was written to the LUN. If I remove both servers from the LUN and re-connect them then all data is present. Should both hosts be able to see the data written by either to the LUN in real time?

Thanks in advance.

dynamox · Accepted Answer

bad idea Bruce. You are going to have corruption. Unless you are using some kind of clustering software (MS Clustering/Veritas Clustering) ..two servers should not have concurrent access to the same LUN.

Mosa3lyan · Answer

what is the OS for both hosts ,anyway you cant mask a lun for more than one host unless u have a Cluster environment , this against data integrity, in general to make second host see the changes 'This requires host buffers to be flushed '

dynamox · Answer

so no clustering software involved ? Windows OS ?

Bruce3 · Answer

Correct, Windows OS and no clustering software involved.

CLARiiON

2 host sharing same LUN w/o data refreshing in real time

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