I have not seen this but you may be right. HA would probably work(meaning a host fails and vms need to be restarted) but live migration may not. I don't have enough harrdware to test this fully right now but will try to get something setup.
On Tue, Feb 19, 2013 at 11:33 PM, Rajesh Battala <rajesh.batt...@citrix.com>wrote: > Hi Jason, > If cache=none on the disk then migration of the VM won't work right?. > I was going through RHEL link > https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Linux/6/html-single/Virtualization_Host_Configuration_and_Guest_Installation_Guide/index.html > > Migration restrictions > ============================ > Because device assignment uses hardware on the specific host where the > guest was started, migration and save/restore are not supported when device > assignment is in use. If the guest operating system supports hot-plugging, > assigned devices can be removed prior to the migration or save/restore > operation to enable this feature. > Live migration is only possible between hosts with the same CPU type (that > is, Intel to Intel or AMD to AMD only). > For live migration, both hosts must have the same value set for the No > eXecution (NX) bit, either on or off. > For migration to work, cache=none must be specified for all block devices > opened in write mode. > Warning > Failing to include the cache=none option can result in disk corruption. > > Enabling this feature will have issues with HA right? > > Thanks > Rajesh Battala > > > > -----Original Message----- > > From: Rajesh Battala [mailto:rajesh.batt...@citrix.com] > > Sent: Tuesday, February 19, 2013 7:43 PM > > To: cloudstack-dev@incubator.apache.org > > Subject: RE: Change qcow disk cache=none > > > > Great to hear it worked. > > > > From: Jason Villalta [mailto:ja...@rubixnet.com] > > Sent: Tuesday, February 19, 2013 7:38 PM > > To: cloudstack-dev@incubator.apache.org > > Subject: Re: Change qcow disk cache=none > > > > Thanks for all of your help on this guys. This worked like a charm! > > On Mon, Feb 18, 2013 at 5:30 AM, Wido den Hollander > > <w...@widodh.nl<mailto:w...@widodh.nl>> wrote: > > On 02/18/2013 05:49 AM, Rajesh Battala wrote: > > Sounds great. > > How are you planning to implement the cache config value. From GC > settings or > > as part of offering or a dynamic changeable param to the VM. > > > > This has been covered by this Jira issue: > > https://issues.apache.org/jira/browse/CLOUDSTACK-1302 > > > > Wido > > > > Thanks > > Rajesh Battala > > > > From: Jason Villalta [mailto:ja...@rubixnet.com<mailto: > ja...@rubixnet.com>] > > Sent: Monday, February 18, 2013 9:51 AM > > To: cloudstack-dev@incubator.apache.org<mailto:cloudstack- > > d...@incubator.apache.org> > > Subject: Re: Change qcow disk cache=none > > > > Yes I have gotten farther. I have the hard coded parameter changed and > the > > system Proxy VM is running now but I am running into issues with the > secondary > > storage vm. Troubleshooting that now. > > > > As for the cache setting, I think that still need to be setup as a > configurable > > option without a rebuild. Once I get the cloud fully functional I will > have some > > time to contribute to this issue. For now I just need to get this up > and running. > > > > Thanks, > > > > On Sun, Feb 17, 2013 at 11:11 PM, Rajesh Battala > > <rajesh.batt...@citrix.com<mailto:rajesh.batt...@citrix.com><mailto: > rajesh.ba > > tt...@citrix.com<mailto:rajesh.batt...@citrix.com>>> wrote: > > Now you were able to build and run the cloud right.! > > > > Thanks > > Rajesh Battala > > > > From: Jason Villalta > > [mailto:ja...@rubixnet.com<mailto:ja...@rubixnet.com><mailto:jason@rubix > > net.com<mailto:ja...@rubixnet.com>>] > > Sent: Monday, February 18, 2013 3:59 AM > > To: cloudstack-dev@incubator.apache.org<mailto:cloudstack- > > d...@incubator.apache.org><mailto:cloudstack- > > d...@incubator.apache.org<mailto:cloudstack-dev@incubator.apache.org>> > > Subject: Re: Change qcow disk cache=none Got it, wrong maven version.. > > On Sun, Feb 17, 2013 at 4:54 PM, Jason Villalta > > <ja...@rubixnet.com<mailto:ja...@rubixnet.com><mailto:ja...@rubixnet.co > > m<mailto:ja...@rubixnet.com>><mailto:ja...@rubixnet.com<mailto:jason@r > > ubixnet.com><mailto:ja...@rubixnet.com<mailto:ja...@rubixnet.com>>>> > > wrote: > > I tried this method to build 4.0.0 and I get 3 failed dependencies. Does > > something in git need to be updated with different paths? > > > > error: error reading > /home/sysadmin/.m2/repository/org/apache/axis2/axis2- > > kernel/1.5.1/axis2-kernel-1.5.1.jar; error in opening zip file > > error: error reading > > /home/sysadmin/.m2/repository/org/apache/axis2/mex/1.5.1/mex-1.5.1- > > impl.jar; error in opening zip file > > error: error reading > /home/sysadmin/.m2/repository/org/apache/axis2/axis2- > > mtompolicy/1.5.1/axis2-mtompolicy-1.5.1.jar; error in opening zip file > > > > On Fri, Feb 15, 2013 at 10:16 AM, Marcus Sorensen > > <shadow...@gmail.com<mailto:shadow...@gmail.com><mailto:shadowsor@ > > gmail.com<mailto:shadow...@gmail.com>><mailto:shadow...@gmail.com<m > > ailto:shadow...@gmail.com><mailto:shadow...@gmail.com<mailto:shadows > > o...@gmail.com>>>> wrote: > > If you just want to change 'none' to 'writeback' or something like that: > > > > git clone > https://git-wip-us.apache.org/repos/asf/incubator-cloudstack.git > > cd incubator-cloudstack > > git checkout 4.0 > > vi > > > ./plugins/hypervisors/kvm/src/com/cloud/hypervisor/kvm/resource/LibvirtVMD > > ef.java > > # look for the one occurrence of 'none' in this file and change it as > you see fit > > > > Then build your packages > > (https://cwiki.apache.org/CLOUDSTACK/building-with- > > maven.html#BuildingwithMaven-BuildingRPMpackages) > > mvn install -P deps && ./waf rpm > > or > > mvn package -P deb > > > > If you want the fully configurable experience from GUI, with per > disk-offering > > settings, then you'd open the request, and it may make it into 4.2 in > May. Or you > > could pull the git repo and see if the feature applies to 4.1 and build > your own > > packages in a month or so when the feature branch is ready. > > On Fri, Feb 15, 2013 at 7:05 AM, Jason Villalta > > <ja...@rubixnet.com<mailto:ja...@rubixnet.com><mailto:ja...@rubixnet.co > > m<mailto:ja...@rubixnet.com>><mailto:ja...@rubixnet.com<mailto:jason@r > > ubixnet.com><mailto:ja...@rubixnet.com<mailto:ja...@rubixnet.com>>>> > > wrote: > > So is there anyway to make this work today or will I have to wait until > this is > > properly implemented? This may mean I need to take another look at > openstack > > or opennebula and switch back. > > > > On Fri, Feb 15, 2013 at 9:00 AM, Wido den Hollander > > <w...@widodh.nl<mailto:w...@widodh.nl><mailto:w...@widodh.nl<mailto:w > > i...@widodh.nl>><mailto:w...@widodh.nl<mailto:w...@widodh.nl><mailto:wi > > d...@widodh.nl<mailto:w...@widodh.nl>>>> wrote: > > On 02/15/2013 02:31 PM, Jason Villalta wrote: > > > > Is there any way easy way to make this setting dependent on the storage > > definition? For example some primary storage may need this set to one > value > > such as cache=writeback such as with the case of ZFS, GlusterFS, CEPH. > Then > > other storage may want a different setting such as cache=writethough or > none > > which is the case with a local ext4 storage or NFS. > > > > Exactly. > > > > I brought this up about a week ago, see this thread: > > http://markmail.org/thread/qmrod55gfmhwzot4 > > > > It shouldn't be a global property, it should be defined per storage > pool, or even > > better, per disk offering. > > > > Right now we are talking about the cache setting, but tomorrow it could > be a > > different setting. > > > > Wido > > > > > > > > On Thu, Feb 14, 2013 at 11:08 PM, Rajesh Battala > > <rajesh.batt...@citrix.com<mailto:rajesh.batt...@citrix.com><mailto: > rajesh.ba > > tt...@citrix.com<mailto:rajesh.batt...@citrix.com>><mailto: > rajesh.battala@cit > > rix.com<mailto:rajesh.batt...@citrix.com><mailto: > rajesh.batt...@citrix.com< > > mailto:rajesh.batt...@citrix.com>>>> wrote: > > > > Hi Jason Villalta, > > In LibvirtVmDef.java, there is DiskDef class , get the cache value from > the Global > > config, while constructing the xml in the override method the class > toString() > > specify the cache value, currently it is using "none". > > > > NOTE: whenever there is change in GC value, MS should restart for the > value to > > take effect. > > > > Thanks > > Rajesh Battala > > -----Original Message----- > > From: Rajesh Battala > > [mailto:rajesh.batt...@citrix.com<mailto:rajesh.batt...@citrix.com > ><mailto:raj > > esh.batt...@citrix.com<mailto:rajesh.batt...@citrix.com>><mailto: > rajesh.batt > > a...@citrix.com<mailto:rajesh.batt...@citrix.com><mailto: > rajesh.battala@citrix > > .com<mailto:rajesh.batt...@citrix.com>>>] > > Sent: Friday, February 15, 2013 9:22 AM > > To: cloudstack-us...@incubator.apache.org<mailto:cloudstack- > > us...@incubator.apache.org><mailto:cloudstack- > > us...@incubator.apache.org<mailto:cloudstack- > > us...@incubator.apache.org>><mailto:cloudstack- > > us...@incubator.apache.org<mailto:cloudstack- > > us...@incubator.apache.org><mailto:cloudstack- > > us...@incubator.apache.org<mailto:cloudstack- > > us...@incubator.apache.org>>>; cloudstack- > > d...@incubator.apache.org<mailto:d...@incubator.apache.org><mailto:dev@in > > cubator.apache.org<mailto:d...@incubator.apache.org>><mailto:dev@incubat > > or.apache.org<mailto:d...@incubator.apache.org><mailto:d...@incubator.apac > > he.org<mailto:d...@incubator.apache.org>>> > > Subject: RE: Change qcow disk cache=none > > > > Hi Jason Villalta, > > > > Can you raise the ticket for the same. I can work on it if you assign to > me. > > > > Thanks > > Rajesh Battala > > -----Original Message----- > > From: Edison Su > > [mailto:edison...@citrix.com<mailto:edison...@citrix.com><mailto: > Edison.su > > @citrix.com<mailto:edison...@citrix.com>><mailto:edison...@citrix.com > <mail > > to:edison...@citrix.com><mailto:edison...@citrix.com<mailto: > Edison.su@citri > > x.com>>>] > > Sent: Friday, February 15, 2013 4:59 AM > > To: cloudstack-us...@incubator.apache.org<mailto:cloudstack- > > us...@incubator.apache.org><mailto:cloudstack- > > us...@incubator.apache.org<mailto:cloudstack- > > us...@incubator.apache.org>><mailto:cloudstack- > > us...@incubator.apache.org<mailto:cloudstack- > > us...@incubator.apache.org><mailto:cloudstack- > > us...@incubator.apache.org<mailto:cloudstack- > > us...@incubator.apache.org>>> > > Subject: RE: Change qcow disk cache=none > > > > The code is at https://git-wip-us.apache.org/repos/asf?p=incubator- > > cloudstack.git;a=blob;f=plugins/hypervisors/kvm/src/com/cloud/hypervis > > or/kv > > m/resource/LibvirtVMDef.java;h=acfd9cf1fe8eba217f09e20adf3101d1295d51d > > > > a;hb=HEAD, search "cache". > > you can add a global configuration in cloudstack, or add a configuration > in > > agent.properties, to specify cache attribute. > > -----Original Message----- > > From: Jason Villalta > > [mailto:ja...@rubixnet.com<mailto:ja...@rubixnet.com><mailto:jason@rubix > > net.com<mailto:ja...@rubixnet.com>><mailto:ja...@rubixnet.com<mailto:jas > > o...@rubixnet.com><mailto:ja...@rubixnet.com<mailto:ja...@rubixnet.com>> > > >] > > Sent: Thursday, February 14, 2013 2:16 PM > > To: cloudstack-us...@incubator.apache.org<mailto:cloudstack- > > us...@incubator.apache.org><mailto:cloudstack- > > us...@incubator.apache.org<mailto:cloudstack- > > us...@incubator.apache.org>><mailto:cloudstack- > > us...@incubator.apache.org<mailto:cloudstack- > > us...@incubator.apache.org><mailto:cloudstack- > > us...@incubator.apache.org<mailto:cloudstack- > > us...@incubator.apache.org>>> > > Subject: Re: Change qcow disk cache=none > > > > Ok, I see the folks at openstack ran into a similar issue. > > https://bugs.launchpad.net/nova/+bug/959637 > > > > How can I contribute to this? Can you recommend a part of the code to > look at > > so I can build and test a patch? > > > > On Thu, Feb 14, 2013 at 5:13 PM, Edison Su > > <edison...@citrix.com<mailto:edison...@citrix.com><mailto: > Edison.su@citrix. > > com<mailto:edison...@citrix.com>><mailto:edison...@citrix.com<mailto: > Ediso > > n...@citrix.com><mailto:edison...@citrix.com<mailto:edison...@citrix.com > >> > > >> > > wrote: > > > > need to change cloudstack java code, right now, it's hard coded to > > > > "cache=none". > > > > -----Original Message----- > > From: Jason Villalta > > [mailto:ja...@rubixnet.com<mailto:ja...@rubixnet.com><mailto:jason@rubix > > net.com<mailto:ja...@rubixnet.com>><mailto:ja...@rubixnet.com<mailto:jas > > o...@rubixnet.com><mailto:ja...@rubixnet.com<mailto:ja...@rubixnet.com>> > > >] > > Sent: Thursday, February 14, 2013 1:45 PM > > To: cloudstack-us...@incubator.apache.org<mailto:cloudstack- > > us...@incubator.apache.org><mailto:cloudstack- > > us...@incubator.apache.org<mailto:cloudstack- > > us...@incubator.apache.org>><mailto:cloudstack- > > us...@incubator.apache.org<mailto:cloudstack- > > us...@incubator.apache.org><mailto:cloudstack- > > us...@incubator.apache.org<mailto:cloudstack- > > us...@incubator.apache.org>>> > > Subject: Change qcow disk cache=none > > > > Is there a way to change this kvm disk cache setting in Cloudstack or > > > > template? > > > > If so where is the setting applied? > > > > -- > > -- > > Jason Villalta > > Co-founder > > 800.799.4407<tel:800.799.4407><tel:800.799.4407<tel:800.799.4407 > >><tel:800 > > .799.4407<tel:800.799.4407><tel:800.799.4407<tel:800.799.4407>>> | > > www.RubixTechnology.com<http://www.RubixTechnology.com><http://www. > > RubixTechnology.com><http://www.RubixTechnology.com> > > > > > > > > > > -- > > -- > > Jason Villalta > > Co-founder > > 800.799.4407<tel:800.799.4407><tel:800.799.4407<tel:800.799.4407 > >><tel:800 > > .799.4407<tel:800.799.4407><tel:800.799.4407<tel:800.799.4407>>> | > > www.RubixTechnology.com<http://www.RubixTechnology.com><http://www. > > RubixTechnology.com><http://www.RubixTechnology.com> > > > > > > > > > > > > > > > > -- > > -- > > Jason Villalta > > Co-founder > > > 800.799.4407<tel:800.799.4407><tel:800.799.4407<tel:800.799.4407>><tel:800 > > .799.4407<tel:800.799.4407><tel:800.799.4407<tel:800.799.4407>>> | > > www.RubixTechnology.com<http://www.RubixTechnology.com><http://www. > > RubixTechnology.com><http://www.RubixTechnology.com> > > > > > > > > -- > > -- > > Jason Villalta > > Co-founder > > [cid:ii_13a3276a82c64fe9] > > 800.799.4407<tel:800.799.4407><tel:800.799.4407<tel:800.799.4407>> | > > www.RubixTechnology.com<http://www.RubixTechnology.com><http://www. > > RubixTechnology.com><http://www.rubixtechnology.com/> > > > > > > > > -- > > -- > > Jason Villalta > > Co-founder > > [cid:ii_13a3276a82c64fe9] > > 800.799.4407<tel:800.799.4407><tel:800.799.4407<tel:800.799.4407>> | > > www.RubixTechnology.com<http://www.RubixTechnology.com><http://www. > > RubixTechnology.com><http://www.rubixtechnology.com/> > > > > > > > > -- > > -- > > Jason Villalta > > Co-founder > > [cid:ii_13a3276a82c64fe9] > > 800.799.4407<tel:800.799.4407> | > > www.RubixTechnology.com<http://www.RubixTechnology.com><http://www.r > > ubixtechnology.com/> > > > > > > > > > > -- > > -- > > Jason Villalta > > Co-founder > > [cid:ii_13a3276a82c64fe9] > > 800.799.4407 | > > www.RubixTechnology.com<http://www.rubixtechnology.com/> > -- -- *Jason Villalta* Co-founder [image: Inline image 1] 800.799.4407 | www.RubixTechnology.com <http://www.rubixtechnology.com/>
