Re: bhyve disk performance issue

On 2/16/24 11:42, Chuck Tuffli wrote:
> On Fri, Feb 16, 2024, at 9:19 AM, Matthew Grooms wrote:
>>
>> Hi All,
>>
>>
>> I'm in the middle of a project that involves building out a handful 
>> of servers to host virtual Linux instances. Part of that includes 
>> testing bhyve to see how it performs. The intent is to compare host 
>> storage options such as raw vs zvol block devices and ufs vs zfs disk 
>> images using hardware raid vs zfs managed disks. It would also involve
>>
>>
> …
>>
>> Here is a list of a few other things I'd like to try:
>>
>>
>> 1) Wiring guest memory ( unlikely as it's 32G of 256G )
>> 2) Downgrading the host to 13.2-RELEASE
>
> FWIW we recently did a similar exercise and saw significant 
> performance differences on ZFS backed disk images when comparing 14.0 
> and 13.2. We didn’t have time to root cause the difference, so it 
> could simply be some tuning difference needed for 14.

Hi Chuck,

That's very helpful feedback. I'll start by downgrading the host to 13.2 
and report back here.

Thanks again,

-Matthew