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?
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?
High latency in a vSAN cluster is often attributed to congestion in one or more disk groups. Congestion acts as a feedback mechanism to slow down the rate of incoming IO requests so that the disk group can manage the IOs it receives. This is a common cause of performance issues in a vSAN environment. Other options, like the use of PVSCSI controllers or the status of Erasure Coding, don't directly address the issue of high latency. Similarly, while jumbo frames can influence network performance, they are not a typical requirement for vSAN performance.
C is correct
I agree with C
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
C prety shure
C. https://kb.vmware.com/s/article/2150018#:~:text=Network%20issues%3A%20A%20network%20issue,policies%20or%20NIC%20teaming%20policies.
C. There is congestion in one or more disk groups.
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.
D - make sens