It does not work on 4.9. It is necessary to register bug jira. 2016-08-25 11:22 GMT+03:00 (IMIS) Enzo Bettini <[email protected]>:
> Hi, > > I can confirm the same behavior on CentOS 7.2.1511 with CloudStack 4.8.0. > > Regards, > Enzo > > > On 25/08/2016 09:42, Andrei Mikhailovsky wrote: > >> I've noticed the same behaviour on kvm with ubuntu 14.04 servers on acs >> 4.7.1.1 >> >> Andrei >> >> ----- Original Message ----- >> >>> From: "Yuriy Karpel" <[email protected]> >>> To: "users" <[email protected]> >>> Sent: Thursday, 25 August, 2016 07:58:56 >>> Subject: Re: KVM disk cache option has no effect >>> CentOS management and kvm node, Cloudstack 4.7.1, Storage RBD. >>> >>> Added value in the table, UI shows that the caching policy WB: >>> >>> 151 4 test_cache a6c0b591-0ca7-4938-91f4-8ed961f490b6 test_cache 0 Disk >>> (null) 0 0 (null) 0 1 (null) 25.08.2016 6:35:07 0 1 (null) (null) (null) >>> (null) (null) (null) (null) Active (null) writeback thin >>> >>> >>> >>> Created drive and connected it to the VM, the cache setting is "none": >>> >>> <disk type='network' device='disk'> >>> <driver name='qemu' type='raw' cache='none'/> >>> <auth username='admin'> >>> <secret type='ceph' uuid='f5efdbfb-8fe7-3dfd-bc07- >>> 5088222d8b84'/> >>> </auth> >>> <source protocol='rbd' >>> name='rbd-cl/59053122-a711-45d5-a801-8b3858d84cdc'> >>> <host name='ceph-mon.test.cloud' port='6789'/> >>> </source> >>> <backingStore/> >>> <target dev='vdb' bus='virtio'/> >>> <serial>59053122a71145d5a801</serial> >>> <alias name='virtio-disk1'/> >>> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' >>> function='0x0'/> >>> </disk> >>> >>> >>> >>> >>> >>> 2016-08-24 17:27 GMT+03:00 Andrija Panic <[email protected]>: >>> >>> Hi Enzo, >>>> >>>> just go to table/view "disk_offering_view" and in the field "cache_mode" >>>> insert "writeback" value.... >>>> >>>> Be aware, that if using writeback cache with CEPH - this is not really >>>> needed, and perhaps better to use RBD cache on ceph.conf on KVM side... >>>> Also note, with writeback cache set - if using NFS as storage - live >>>> migrations will not work ! >>>> With ceph and writeback cache, live migration works (libvirt limitation, >>>> you can google it). >>>> >>>> Best, >>>> Andrija >>>> >>>> On 24 August 2016 at 10:24, (IMIS) Enzo Bettini <[email protected]> >>>> wrote: >>>> >>>> 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 >>>> >>> >
