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July 6th, 2021 04:00
Question Windows Server 2019 slow write performance with NVMe datastore on VMware ESXi 6.7 U3
Hi all,
I have 2 DELL R630. ESXi 6.7 U3 is running. When I'm testing the disk benchmark from Windows 2019 VM on both the ESXi , I see different results.
All the R630 configurations are the same except for the physical CPU.
1st server "ESXi01" has 2cpu and each cpu has 16 cores.
| Intel(R) Xeon(R) CPU E5-2690 v4 @ 2.60GHz |
| Model 79 Stepping 1 |
2nd server "ESXi02" has 2cpu and each cpu has 18 cores.
| Intel(R) Xeon(R) CPU E5-2699 v3 @ 2.30GHz |
| Model 63 Stepping 2 |
We use the below NVME adapater/disk directly(PCIE)on both the R630 servers for data. Please note,we are not using any RAID for NVME.
Ableconn PEXM2-130 Dual PCIe NVMe M.2 SSDs Carrier Adapter Card - PCI Express 3.0 x8 Card Support 2X M.2 NGFF PCIe NVMe SSD for Mac & PC (ASMedia ASM2824 Switch) - Support Non-Bifurcation Motherboard
Inland Platinum 2TB SSD NVMe PCIe Gen 3.0x4 M.2 2280 3D NAND Internal Solid State Drive, R/W up to 3,400/3,000 MB/s, PCIe Express 3.1 and NVMe 1.3 Compatible, Utimate Gaming Solutions (2TB)
Windows 2019 from 1st ESXi server "ESXi01"
for 4 KB,im getting around 262 MB/s.
Windows 2019 from 2nd ESXi server "ESXi02"
for 4 KB,im getting around 127 MB/s.
What might the issue? except CPU all are same.Physical CPU plays a major role on 2nd ESXi ?
Please help.
Thanks,
Raj
Dell-DylanJ
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July 6th, 2021 09:00
Hello,
The hardware you are using is not supported, so I can't make any recommendation on that. What troubleshooting steps have you taken so far?
ManivelRR
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July 6th, 2021 11:00
Hi
This is testing environment and as per VMware compatibilty matrix,this hardware R630 supports 6.7 U3.
https://www.vmware.com/resources/compatibility/search.php?deviceCategory=server&details=1&keyword=r630&page=1&display_interval=10&sortColumn=Partner&sortOrder=Asc
Other troubleshooting:-
Added NVME controller from VM and noticed bit improvement.
Any ideas?
Dell-DylanJ
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July 6th, 2021 11:00
I'm referring to the NVMe storage implementation you listed in your post when I mentioned the lack of support. I would not expect to find a gaming drive in VMware's HCL, but I did not look, either.
I would recommend exporting and reviewing the ESXi logs from the system. You may be able to use those to determine what is causing the performance you're seeing. I've got a link to VMware's article on exporting those logs provided below.
https://dell.to/2TFUDvO
ManivelRR
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July 7th, 2021 00:00
ok.