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VMAX3 and XtremIO on same host
Hi all,
Did somebody has experience about having VMAX3 devices AND XtremIO devices on the same host. Some configuration issue are easy to manage ( ex. zoning, flags ) but some are more tricky ( ex. depth queue ). What are the best practices/recommendations for this kind of configuration ?
Thanks,
Michel
...and yes this can also be posted in the XtremIO community ...
EMCProvenSoluti
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March 25th, 2015 13:00
EMC XtremIO – Setting Disk.SchedNumReqOutstanding On vSphere 5.5 (PowerCLI)
Disk.SchedNumReqOutstanding (DSNRO) – Determines the maximum number of active storage commands (I/Os) allowed at any given time at the VMkernel. The default value is 32 and the maximum value is 256. For XtremIO storage with VMware vSphere it is recommended to set the DSNRO parameter to the maximum value of 256.
When using vSphere 5.5 the Disk.SchedNumReqOutstanding parameter needs to be set at the individual Host LUN level (Per Device Setting). Prior to vSphere 5.5 the DSNRO value was globally set for all volumes presented to the ESX host (Per Host Setting). vSphere 5.5 has made the DSNRO parameter change more granular for a good reason; rather than setting the parameter at the Host level which would affect all connected storage (regardless of array specific guidelines) you can now set the value on a per LUN basis.
Full post here:
http://davidring.ie/2014/09/08/emc-xtremio-setting-disk-schednumreqoutstanding-on-vsphere-5-5-powercli/
Anonymous
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March 26th, 2015 03:00
Hi ,
Nice for ESX, what about Linux servers ( RedHat ) ?
Thanks,
Michel