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GuestUnmap and Unmapfairness that is enabled may lead to vSAN issues

  • August 19, 2022
  • 7 comments
  • 505 views
victorwu
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One of my customer upgraded the vSAN cluster to 7.0 U3d from 6.7 U3, unfortunately my customer reported the performance of some virtual machines is dropped. We have opened the SR to VMware GSS, but they do not find out the reason. I search some useful information in the internet, it may be related to a known issue exists on vSAN 7.0. I shared the following information to VMware GSS, now we are waiting for confirmation from VMware.

 

https://communities.vmware.com/t5/VMware-vSAN-Discussions/vSAN-7-0-poor-write-performance-and-high-latency-with-NVMe/td-p/2807761

https://kb.vmware.com/s/article/88832

Victor Wu
Chris.Childerhose
MicoolPaul
Stabz

7 comments

Chris.Childerhose
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  • Chris.Childerhose
  • Veeam Legend, Veeam Vanguard
  • August 19, 2022

Interesting issue for sure.  Let us know the outcome Victor.

Chris Childerhose - VMCA2024 | VMCE2023 | VMCE-SP2024 | Veeam Vanguard 8* | Veeam Legend 5* | VUG Canada Leader | vExpert 6* | Toronto VMUG Leader | VCAP-DCV/VCP-DCV | Object First Ace | Cisco Champion | Twitter: @cchilderhose | Blog Site – https://just-virtualization.tech
victorwu
Chris.Childerhose
victorwu
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  • victorwu
  • Author
  • Veeam Vanguard
  • August 19, 2022

Interesting issue for sure.  Let us know the outcome Victor.

Sure. I will let you know the result.😙

Victor Wu
Chris.Childerhose
victorwu
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  • victorwu
  • Author
  • Veeam Vanguard
  • August 23, 2022

Interesting issue for sure.  Let us know the outcome Victor.

Sure. I will let you know the result.😙

@Chris.Childerhose We will apply the workaround this week. Update you soon.

Victor Wu
Chris.Childerhose
victorwu
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  • victorwu
  • Author
  • Veeam Vanguard
  • August 29, 2022

Interesting issue for sure.  Let us know the outcome Victor.

Sure. I will let you know the result.😙

@Chris.ChilderhoseWe will apply the workaround this week. Update you soon.

@Chris.Childerhose My customer applied the workaround last Friday, it seems the performance issue is resolved. And the backup windows for some critical VMs is also improved, they are using the Veeam VBR v11. Now they will keep to monitor a few days.

Victor Wu
Rick Vanover
Chris.Childerhose
Chris.Childerhose
Forum|alt.badge.img+21
  • Chris.Childerhose
  • Veeam Legend, Veeam Vanguard
  • August 29, 2022

Interesting issue for sure.  Let us know the outcome Victor.

Sure. I will let you know the result.😙

@Chris.ChilderhoseWe will apply the workaround this week. Update you soon.

@Chris.ChilderhoseMy customer applied the workaround last Friday, it seems the performance issue is resolved. And the backup windows for some critical VMs is also improved, they are using the Veeam VBR v11. Now they will keep to monitor a few days.

Very cool that the fix corrected the problem. Hopefully things work smooth now.  Thanks for the update.

Chris Childerhose - VMCA2024 | VMCE2023 | VMCE-SP2024 | Veeam Vanguard 8* | Veeam Legend 5* | VUG Canada Leader | vExpert 6* | Toronto VMUG Leader | VCAP-DCV/VCP-DCV | Object First Ace | Cisco Champion | Twitter: @cchilderhose | Blog Site – https://just-virtualization.tech
victorwu
Chris.Childerhose
victorwu
Forum|alt.badge.img+7
  • victorwu
  • Author
  • Veeam Vanguard
  • September 19, 2022

Interesting issue for sure.  Let us know the outcome Victor.

Sure. I will let you know the result.😙

@Chris.ChilderhoseWe will apply the workaround this week. Update you soon.

@Chris.ChilderhoseMy customer applied the workaround last Friday, it seems the performance issue is resolved. And the backup windows for some critical VMs is also improved, they are using the Veeam VBR v11. Now they will keep to monitor a few days.

Very cool that the fix corrected the problem. Hopefully things work smooth now.  Thanks for the update.

@Chris.Childerhose We have applied this workaround into production environment, the performance issue of all VMs is resolved.

Victor Wu
Chris.Childerhose
Chris.Childerhose
Forum|alt.badge.img+21
  • Chris.Childerhose
  • Veeam Legend, Veeam Vanguard
  • September 19, 2022

Interesting issue for sure.  Let us know the outcome Victor.

Sure. I will let you know the result.😙

@Chris.ChilderhoseWe will apply the workaround this week. Update you soon.

@Chris.ChilderhoseMy customer applied the workaround last Friday, it seems the performance issue is resolved. And the backup windows for some critical VMs is also improved, they are using the Veeam VBR v11. Now they will keep to monitor a few days.

Very cool that the fix corrected the problem. Hopefully things work smooth now.  Thanks for the update.

@Chris.ChilderhoseWe have applied this workaround into production environment, the performance issue of all VMs is resolved.

Very cool and glad to hear it was resolved Victor. 😁

Chris Childerhose - VMCA2024 | VMCE2023 | VMCE-SP2024 | Veeam Vanguard 8* | Veeam Legend 5* | VUG Canada Leader | vExpert 6* | Toronto VMUG Leader | VCAP-DCV/VCP-DCV | Object First Ace | Cisco Champion | Twitter: @cchilderhose | Blog Site – https://just-virtualization.tech
victorwu
Chris.Childerhose
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