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L2 Network flow control is not L4 TCP congestion management.<br />
To add to the mess - slow disks are called congestion in VSAN.<br />
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Unless you find printed material from vmware recommending that, general recomendation is to not change anything ever, and if you are to change - make one change at a time
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You should have a dedicated VMKernel Portgroup for vSAN.
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The environment is an POC for VSAN and currently only using 2x10 gb uplinks for management, virtual machine, vMotion and VSAN port groups. if I am not mistaken ethtool can disable flow control on uplinks. but I want to disable flow control only on the VSAN port group. <br />
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is there any way, if we can disable flow control on the vmkernel of VSAN.
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Virtual SAN has built-in congestion management, disabling flow control on VMkernel interfaces tagged for Virtual SAN traffic is recommended. I want to achieve this using ethtool. I know in ethtool, you need to set 3 parameters I,e autonegotiate, RX, TX. I just want to confirm that if I have to disable flow control on VMKernel interfaces tagged for VSAN, do all parameters needs to be set off or what?
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Virtual SAN has built-in congestion management, disabling flow control on VMkernel interfaces tagged for Virtual SAN traffic is recommended. I want to achieve this using ethtool. I know in ethtool, you need to set 3 parameters I,e autonegotiate, RX, TX. I just want to confirm that if I have to disable flow control on VMKernel interfaces tagged for VSAN, do all parameters needs to be set off or what?

disable flow control on VMkernel interfaces tagged for Virtual SAN traffic

Virtualization is the act of creating a virtual (rather than actual) version of something, including (but not limited to) a virtual computer hardware platform, operating system (OS), storage device, or computer network resources. Virtualization is usually the creation of a system that executes separate from the underlying hardware resources, or the creation of an entire desktop for systems located elsewhere, similar to thin clients.

Virtualization

VMware, a software company founded in 1998,  was one of the first commercially successful companies to offer x86 virtualization. The storage company EMC purchased VMware in 1994. Dell Technologies acquired EMC in 2016. VMware’s parent company is now Dell Technologies.

VMware has many software products that run on desktops, Microsoft Windows, Linux, and macOS, which allows the virtualizing of the x86 architecture.  Its enterprise software hypervisor for servers, VMware vSphere Hypervisor (ESXi), is a bare-metal hypervisor that runs directly on the server hardware and does not require an additional underlying operating system.

VMware

The term "Backup" means the methods and processes involved to copy computer data (system data as well as application data) to media other than the ones where the data originally live (disk, tape, optical, cloud). "Restore" in turn means the methods and processes involved in data recovery, i. e., bringing back copied computer data to their original location. Backup/Restore primarily serves as a means of protection against data loss, be it due to disaster, corruption or sabotage. It can also be used for recovering data from an earlier point in time and even for cloning machines or applications. There is a wide variety of backup/restore software available, from expensive commercial products to free or open source tools.