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August 8th, 2020 12:00
LUN usage is always 50%
- Hello!
When I open to the LUN properties, I see the utilization percentage is always no more than 50%, why is 50% the maximum value, and not 100%? - This LUN (5TB Size) is thin and is on a pool consisting of 5 SSD 400GB (RAID5 4+1) and 15 SAS 600GB 15K (RAID5 4+1).
- It contains about 15 write-intensive virtual machines. What are the options for increasing perfomance?
- It seems to me that the speed and number of iops can be higher.
- Maybe it is necessary to split these virtual machines into several LUNs?
My storage is VNX5400.
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Dell-DylanJ
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August 12th, 2020 10:00
Hi Alexander,
I don't know that I'll be able to give you a satisfactory answer, but I spoke with an EMC trainer who advised me that what you're seeing is a result of storage tier policies. He had suggested using auto tiering, but also provided the caveat that he didn't expect it to provide a particularly significant difference. Linked below are a few white papers on VNX storage tiers. You may find some additional clarification within these.
https://dell.to/31J6x85
https://dell.to/31J6xF7