None is when you use multiple queues , which seems to be enabled on my
HostedEngine VM by default.
In both cases, we shouldn't reorder I/O requests in the VM, just to do the
same on the Host.
That's why I left queueing to happen only on the host.
Best Regards,
Strahil NikolovOn Jan 2, 2020 07:54, Guillaume Pavese
<[email protected]> wrote:
>
> Hi,
>
> I use something similar
> However, I think that the correct scheduler in case of virtio-scsi devices
> (sd*) should be "noop" instead of "none"
>
> Best,
>
>
> Guillaume Pavese
> Ingénieur Système et Réseau
> Interactiv-Group
>
>
> On Tue, Dec 31, 2019 at 9:27 PM Strahil <[email protected]> wrote:
>>
>> You can manually change the I/O scheduler of the disks and if that works
>> better for you, put a rule in udev.
>>
>> Here is mine:
>>
>> [root@engine rules.d]# cat /etc/udev/rules.d/90-default-io-scheduler.rules
>> ACTION=="add|change", KERNEL=="sd*[!0-9]", ATTR{queue/scheduler}="none"
>> ACTION=="add|change", KERNEL=="vd*[!0-9]", ATTR{queue/scheduler}="none"
>>
>> [root@engine rules.d]# cat /sys/block/vda/queue/scheduler
>> [none] mq-deadline kyber
>>
>> Best Regards,
>> Strahil Nikolov
>>
>> On Dec 31, 2019 12:30, Demeter Tibor <[email protected]> wrote:
>>>
>>> Dear Users,
>>>
>>> I've successfully upgraded my 4 node hyperconverged system from 4.2.8 to
>>> 4.3.7.
>>> After upgrade everything seems to working fine, but the whole management
>>> system seems very slow.
>>> Spends many seconds when I clicking on "virtual machines" or I want to edit
>>> a virtual machines.
>>> The speed of vms and the IO is fine.
>>>
>>> It is running on a glusterfs (distributed replicate, on 3 node, 9 bricks).
>>> There are no errors, everything fine. but terrible slow:(
>>> The engine vm has 0.2-0.3 load.
>>>
>>> What can I do?
>>>
>>> Thanks in advance and I wish Happy New Year!
>>>
>>> Regards,
>>> Tibor
>>>
>>>
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