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From Andrei Mikhailovsky <and...@arhont.com.INVALID>
Subject Re: KVM disk cache option has no effect
Date Thu, 25 Aug 2016 09:09:50 GMT
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" <enzo.b@imisglobal.com>
> To: "users" <users@cloudstack.apache.org>
> 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" <sweller@ena.com>
>>> To: "users" <users@cloudstack.apache.org>
>>> 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 <yuriy@karpel.su>
>>> Sent: Thursday, May 12, 2016 7:07 AM
>>> To: users@cloudstack.apache.org
>>> 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 <andrei@arhont.com>:
>>>
>>>> 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" <shweta.agarwal1@accelerite.com>
>>>>> To: "users" <users@cloudstack.apache.org>
>>>>> 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:andrei@arhont.com]
>>>>> 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
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
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