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iSCSI Attached vs RDM vs VMDK?

Question asked by Talbert Houle on Jun 18, 2014
Latest reply on Sep 9, 2014 by Talbert Houle

In regards to setting up high I/O environments like database servers, I am looking for a definitive recommendation.  I ask because I am coming across varying studies saying iSCSI attached drives, using Nimble Connection Manager, is better or just as good as using RDM configured with the VMware Paravirtual SCSI Controller.  VMware says performance of a VMDK is negligible in comparison to using RDM, as stated in:  http://www.vmware.com/files/pdf/solutions/sql_server_virtual_bp.pdf.

 

Has anyone performed the performance comparisons or know of a study that shows the three compared?

 

Thank you,

Talbert

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