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.
