[pve-devel] [PATCH] qemuserver : iothrottle add support for throttling burst max

Alexandre DERUMIER aderumier at odiso.com
Thu Dec 5 10:11:11 CET 2013


>>@alexandre 
>>does your patch also include copying these for cloning and templates? 
>>Stefan 
yes,I think any disk options is duplicate to the clone 



----- Mail original ----- 

De: "Stefan Priebe" <s.priebe at profihost.ag> 
À: "Alexandre DERUMIER" <aderumier at odiso.com>, "Dietmar Maurer" <dietmar at proxmox.com> 
Cc: pve-devel at pve.proxmox.com 
Envoyé: Mercredi 4 Décembre 2013 20:24:32 
Objet: Re: [pve-devel] [PATCH] qemuserver : iothrottle add support for throttling burst max 

Am 04.12.2013 18:25, schrieb Alexandre DERUMIER: 
>>> or is that too easy? 
> 
> I would like to tune value manually, I have differents vm with same throttle, 
> but some of them need more burst, depend of the workload. 
> 
> Example: I have some databases throttle to 10MB/s which I known then need 1GB of data write at full speed sometimes. 

i would like to tune them too individually. As it is a value and not /s 
i think we can't use a constant factor for the values /s. 

May be it should be hidden by default and open up when selecting 
something like expert mode? 

@alexandre 
does your patch also include copying these for cloning and templates? 

Stefan 

> Seem more easy to define the value manually. 
> 
> 
> (Note that the burst is not in iop/s or MB/s, it's ios or MB. the quantity of ios or MB we want to run at full speed before throttling) 
> 
> 
> 
> ----- Mail original ----- 
> 
> De: "Dietmar Maurer" <dietmar at proxmox.com> 
> À: "Alexandre Derumier" <aderumier at odiso.com>, pve-devel at pve.proxmox.com 
> Envoyé: Mercredi 4 Décembre 2013 17:10:17 
> Objet: RE: [pve-devel] [PATCH] qemuserver : iothrottle add support for throttling burst max 
> 
> That whole thing looks a bit clumsy. Does a user really want to specify all those values manually? 
> 
> Maybe the user can specify a percentage instead, and we can automatically 
> compute those burst values? 
> 
> burst=1.3 ==> ioops_max = ioops * 1.3 
> 
> or is that too easy? 
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