Guys, I', on 4.5.1, Ubuntu 14.04, and when I edit this field in disk_offerings_view, it does work, and ps aux | grep qemu clearly shows cache=writeback
so this might be broken later, and would be good to understand when exactly, since we plan upgrade soon to 4.8 release... cheers On 25 August 2016 at 11:09, Andrei Mikhailovsky <[email protected]> wrote: > I've experimented by using virsh and virtual-manager gui app. The acs gui > settings make no difference to the cache settings. I am surprised it has > not been working for ages and no one actually fixed it. > > Cheers > > ----- Original Message ----- > > From: "(IMIS) Enzo Bettini" <[email protected]> > > To: "users" <[email protected]> > > Sent: Wednesday, 24 August, 2016 09:24:50 > > Subject: Re: KVM disk cache option has no effect > > > Hi Andrei, > > > > How did you get around this? Did you manually update the VM > > configuration using virsh edit? > > > > Regards, > > Enzo > > > > On 15/05/2016 00:31, Andrei Mikhailovsky wrote: > >> Not as far as I know (. The ticket status is closed > >> > >> Andrei > >> > >> ----- Original Message ----- > >>> From: "Simon Weller" <[email protected]> > >>> To: "users" <[email protected]> > >>> Sent: Thursday, 12 May, 2016 14:38:35 > >>> Subject: Re: KVM disk cache option has no effect > >>> All, > >>> > >>> Is there a current issue in Jira on this? > >>> > >>> - Si > >>> > >>> > >>> > >>> > >>> > >>> ________________________________________ > >>> From: Yuriy Karpel <[email protected]> > >>> Sent: Thursday, May 12, 2016 7:07 AM > >>> To: [email protected] > >>> Subject: Re: KVM disk cache option has no effect > >>> > >>> The same function does not work on centos + ceph. CloudStack 4.7.1 > >>> > >>> 2016-05-12 14:29 GMT+03:00 Andrei Mikhailovsky <[email protected]>: > >>> > >>>> Hi Shweta, > >>>> > >>>> thanks for your findings. I am very much surprised to see this was not > >>>> discovered earlier, especially since this feature has been > implemented many > >>>> versions back (back in version 4.4 or 4.5 i think). I was under the > >>>> impression that people are testing and reporting on the new features > before > >>>> they hit the release, which apparently is not the case, at least for > some > >>>> new features. From what I can see this feature was completed about a > year > >>>> ago. > >>>> > >>>> I've tried to reopen this issue, but i don't have the rights due to > the > >>>> Jira being in a temporary Lockdown mode. > >>>> > >>>> Could someone with the right access reopen this issue on the grounds > that > >>>> it was reported (by at least two individuals) that this feature is not > >>>> working. > >>>> > >>>> Many thanks > >>>> > >>>> Andrei > >>>> > >>>> ----- Original Message ----- > >>>>> From: "Shweta Agarwal" <[email protected]> > >>>>> To: "users" <[email protected]> > >>>>> Sent: Thursday, 12 May, 2016 12:02:59 > >>>>> Subject: RE: KVM disk cache option has no effect > >>>>> Hi Andrei, > >>>>> > >>>>> Few days back I was also doing some testing in this area and then we > >>>> found out > >>>>> that cache field in disk offering is just a UI or API parameter. But > in > >>>> actual > >>>>> implementation of the API we are just neglecting this parameter . So > >>>>> effectively these parameters in disk offering does nothing . > >>>>> > >>>>> Thanks > >>>>> Shweta > >>>>> > >>>>> -----Original Message----- > >>>>> From: Andrei Mikhailovsky [mailto:[email protected]] > >>>>> Sent: Thursday, May 12, 2016 4:07 PM > >>>>> To: users > >>>>> Subject: KVM disk cache option has no effect > >>>>> > >>>>> Hello > >>>>> > >>>>> I've been trying to use cache = writeback option for my KVM > hypervisor > >>>> with ceph > >>>>> backend storage. However, when I am launching a vm that uses the disk > >>>> offering > >>>>> with cache=writeback, the cache setting is still set to =none > according > >>>> to the > >>>>> ps aux command.The same applies to the root as well as additional > data > >>>> volumes. > >>>>> I am using ACS 4.7.1, both management and hypervisor servers are > Ubuntu > >>>> 14.04. > >>>>> > >>>>> Could someone please advise on how enable writeback cache? > >>>>> > >>>>> Cheers > >>>>> > >>>>> Andrei > >>>>> > >>>>> > >>>>> > >>>>> > >>>>> > >>>>> DISCLAIMER > >>>>> ========== > >>>>> This e-mail may contain privileged and confidential information > which is > >>>> the > >>>>> property of Accelerite, a Persistent Systems business. It is intended > >>>> only for > >>>>> the use of the individual or entity to which it is addressed. If you > are > >>>> not > >>>>> the intended recipient, you are not authorized to read, retain, copy, > >>>> print, > >>>>> distribute or use this message. If you have received this > communication > >>>> in > >>>>> error, please notify the sender and delete all copies of this > message. > >>>>> Accelerite, a Persistent Systems business does not accept any > liability > >>>> for > > >>>> virus infected mails. > -- Andrija Panić
