An administrator is troubleshooting a vSAN performance issue. In the vSAN performance monitor there is a high latency on the vSAN cluster. What is a possible cause of this?
A.
The Virtual Machines are using PVSCSI controllers.
B.
Erasure Coding is disabled in the storage policy.
C.
There is congestion in one or more disk groups.
D.
Jumbo frames are not enabled on the VMkernel adapters.
Jumbo frames are packets that are larger than the standard size. Enabling Jumbo frames can improve performance, but it is not a requirement for vSAN. It could be a possibility but I feel this is more relevant to the NSX/Networking side of things
In controlled networks with high utilization, using jumbo frames can lead to improved network throughput due to reduced overhead. If jumbo frames are improperly used, they can cause dropped packets and network performance degradation.
https://www.techtarget.com/searchnetworking/definition/jumbo-frames#:~:text=Enabling%20jumbo%20frames%20can%20improve,have%20fewer%20frames%20to%20process.
correction:- answer is C.
https://kb.vmware.com/s/article/2150018
Most often, the increase in latency may be correlated with the issue of congestion in one or more disk groups (KB 2150012). Congestion is a feedback mechanism to slow down the rate of incoming IO requests from the vSAN DOM client layer so that the rate of IO requests to the vSAN disk group can match the rate of IOs that the disk group can service.
A voting comment increases the vote count for the chosen answer by one.
Upvoting a comment with a selected answer will also increase the vote count towards that answer by one.
So if you see a comment that you already agree with, you can upvote it instead of posting a new comment.
MarlonC
2 months, 3 weeks agoMegalodon
3 months, 1 week agoieee13940
3 months, 2 weeks agojcoppola
3 months, 2 weeks agojchampion
3 months, 2 weeks agoseijilo
3 months, 3 weeks agolibraboysg
3 months, 3 weeks agolibraboysg
2 months, 4 weeks agopludbe
4 months ago