Maximum number of LUN – Performance vs Capacity

5 pts.
Tags:
LUN
LUNs
Storage
Storage performance
I have seen some Storage High-End disk subsystems supporting over 60 thousands LUNs and there are some others companies offering a high-end product varying the maximum number of LUN between 2048 and 4096. Can we assume how high is the number of LUN it is better the High-End Storage product? In terms of capacity & performance analysis: Is there any math to find out the best relation between the number of LUN (capacity) and the maximum data transfer (performance)? OBS: I know we have some capacity/performance constraints at the File Systems, HBA driver/firmware, switches and storage controller while the number of LUNs is increased.

Software/Hardware used:
EMC VMAX & Huawei Symantec S6800T

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There isn’t really a correlation between the number of LUNs and how high end the system is. EMC limits the number of LUNs so that if you are a big shop with lots of LUNs you have to buy a bigger unit. Others do the same.

If you will only need 2000 LUNs over the live of the array then it really doesn’t matter what the upper end number of LUNs is. For those that support 60k LUNs that is just marketing. Odds are the array doesn’t have enough IO to actually support that sort of workload.

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