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Dongjianhua
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Is there any suggestion regarding LUN size and datastore size in vSphere 5.X/6.0 environment?

Is there any suggestion regarding LUN size and datastore size in vSphere 5.X/6.0 environment?

Looks like it relates to LUN R/W queue depth and reserve lock ?

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npadmani
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How Large a LUN?

The best way to con gure a LUN for a given VMFS volume is to size for throughput rst and capacity second. That is, you should aggregate the total I/O throughput for all applications or virtual machines that might run on a given shared pool of storage; then make sure you have provisioned enough back-end disk spindles (disk array cache) and appropriate storage service to meet the requirements.

This is actually no di erent from what most system administrators do in a physical environment. It just requires an extra step, to consider when to consolidate a number of workloads onto a single vSphere host or onto a collection of vSphere hosts that are addressing a shared pool of storage.

TECHNICAL WHITE PAPER / 7


Ref: http://www.vmware.com/files/pdf/vmfs-best-practices-wp.pdf

above tech. paper convers following best practice topics

• How large should LUNs be created for a given VMFS volume?
• Should we isolate storage for virtual machines or share a consolidated pool of storage?

• Should we use RDMs or VMFS volumes?
• Should we use disk spanning? If so, are there any concerns or suggestions?


see if this helps.

Narendra Padmani VCIX6-DCV | VCIX7-CMA | VCI | TOGAF 9 Certified

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npadmani
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How Large a LUN?

The best way to con gure a LUN for a given VMFS volume is to size for throughput rst and capacity second. That is, you should aggregate the total I/O throughput for all applications or virtual machines that might run on a given shared pool of storage; then make sure you have provisioned enough back-end disk spindles (disk array cache) and appropriate storage service to meet the requirements.

This is actually no di erent from what most system administrators do in a physical environment. It just requires an extra step, to consider when to consolidate a number of workloads onto a single vSphere host or onto a collection of vSphere hosts that are addressing a shared pool of storage.

TECHNICAL WHITE PAPER / 7


Ref: http://www.vmware.com/files/pdf/vmfs-best-practices-wp.pdf

above tech. paper convers following best practice topics

• How large should LUNs be created for a given VMFS volume?
• Should we isolate storage for virtual machines or share a consolidated pool of storage?

• Should we use RDMs or VMFS volumes?
• Should we use disk spanning? If so, are there any concerns or suggestions?


see if this helps.

Narendra Padmani VCIX6-DCV | VCIX7-CMA | VCI | TOGAF 9 Certified
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