Re: [openstack-dev] what code in cinder volume driver supports volume migration between two backends of same type but having different volume types? [cinder]
Please do feel free to write a patch - you can probably do the best job, given that the questions are still fresh in your mind. On 1 March 2015 at 21:37, Nikesh Kumar Mahalka nikeshmaha...@vedams.com wrote: Thanks, I think if these informations are added in openstack documents having topic volume migration then it would be good for new folks in cinder. Regards Nikesh On Sun, Mar 1, 2015 at 10:12 PM, Duncan Thomas duncan.tho...@gmail.com wrote: Migrate - move between backends of the same volume type Retype - move between types. Will migrate the volume for you if necessary On 1 March 2015 at 09:40, Avishay Traeger avis...@stratoscale.com wrote: Nikesh, The case you are trying is supposed to fail. You have a volume of type dothill_realstor1 which is defined to say this volume must be on backend DotHill_RealStor1. This is a requirement that you defined for that volume. Now you want to migrate it to realstor2, which is a violation of the requirement that you specified. To migrate it, you should change the volume type (retype), which changes the requirement. Thanks, Avishay On Sat, Feb 28, 2015 at 11:02 AM, Nikesh Kumar Mahalka nikeshmaha...@vedams.com wrote: I tried below link for volume migration on my driver and also similar efforts for LVM. Even whatever documents available in openstack for volume-migration,each one showing volume migration of a volume having volume type None I added host assisted volume migration function in my cinder driver. When i am trying volume migration on a volume without volume type,then my volume migration function is getting called and i am able to do volume migration. But when i am trying volume migration on a volume having volume type,then my volume migration function is not getting called. http://paste.openstack.org/show/183392/ http://paste.openstack.org/show/183405/ On Tue, Jan 20, 2015 at 12:31 AM, Nikesh Kumar Mahalka nikeshmaha...@vedams.com wrote: do cinder retype (v2) works for lvm? How to use cinder retype? I tried for volume migration from one volume-type LVM backend to another volume-type LVM backend.But its failed. How can i acheive this? Similarly i am writing a cinder volume driver for my array and want to migrate volume from one volume type to another volume type for my array backends. so want to know how can i achieve this in cinder driver? Regards Nikesh __ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev -- *Avishay Traeger* *Storage RD* Mobile: +972 54 447 1475 E-mail: avis...@stratoscale.com Web http://www.stratoscale.com/ | Blog http://www.stratoscale.com/blog/ | Twitter https://twitter.com/Stratoscale | Google+ https://plus.google.com/u/1/b/108421603458396133912/108421603458396133912/posts | Linkedin https://www.linkedin.com/company/stratoscale __ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev -- Duncan Thomas __ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev __ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev -- Duncan Thomas __ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
Re: [openstack-dev] what code in cinder volume driver supports volume migration between two backends of same type but having different volume types? [cinder]
Migrate - move between backends of the same volume type Retype - move between types. Will migrate the volume for you if necessary On 1 March 2015 at 09:40, Avishay Traeger avis...@stratoscale.com wrote: Nikesh, The case you are trying is supposed to fail. You have a volume of type dothill_realstor1 which is defined to say this volume must be on backend DotHill_RealStor1. This is a requirement that you defined for that volume. Now you want to migrate it to realstor2, which is a violation of the requirement that you specified. To migrate it, you should change the volume type (retype), which changes the requirement. Thanks, Avishay On Sat, Feb 28, 2015 at 11:02 AM, Nikesh Kumar Mahalka nikeshmaha...@vedams.com wrote: I tried below link for volume migration on my driver and also similar efforts for LVM. Even whatever documents available in openstack for volume-migration,each one showing volume migration of a volume having volume type None I added host assisted volume migration function in my cinder driver. When i am trying volume migration on a volume without volume type,then my volume migration function is getting called and i am able to do volume migration. But when i am trying volume migration on a volume having volume type,then my volume migration function is not getting called. http://paste.openstack.org/show/183392/ http://paste.openstack.org/show/183405/ On Tue, Jan 20, 2015 at 12:31 AM, Nikesh Kumar Mahalka nikeshmaha...@vedams.com wrote: do cinder retype (v2) works for lvm? How to use cinder retype? I tried for volume migration from one volume-type LVM backend to another volume-type LVM backend.But its failed. How can i acheive this? Similarly i am writing a cinder volume driver for my array and want to migrate volume from one volume type to another volume type for my array backends. so want to know how can i achieve this in cinder driver? Regards Nikesh __ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev -- *Avishay Traeger* *Storage RD* Mobile: +972 54 447 1475 E-mail: avis...@stratoscale.com Web http://www.stratoscale.com/ | Blog http://www.stratoscale.com/blog/ | Twitter https://twitter.com/Stratoscale | Google+ https://plus.google.com/u/1/b/108421603458396133912/108421603458396133912/posts | Linkedin https://www.linkedin.com/company/stratoscale __ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev -- Duncan Thomas __ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
Re: [openstack-dev] what code in cinder volume driver supports volume migration between two backends of same type but having different volume types? [cinder]
I tried below link for volume migration on my driver and also similar efforts for LVM. Even whatever documents available in openstack for volume-migration,each one showing volume migration of a volume having volume type None I added host assisted volume migration function in my cinder driver. When i am trying volume migration on a volume without volume type,then my volume migration function is getting called and i am able to do volume migration. But when i am trying volume migration on a volume having volume type,then my volume migration function is not getting called. http://paste.openstack.org/show/183392/ http://paste.openstack.org/show/183405/ On Tue, Jan 20, 2015 at 12:31 AM, Nikesh Kumar Mahalka nikeshmaha...@vedams.com wrote: do cinder retype (v2) works for lvm? How to use cinder retype? I tried for volume migration from one volume-type LVM backend to another volume-type LVM backend.But its failed. How can i acheive this? Similarly i am writing a cinder volume driver for my array and want to migrate volume from one volume type to another volume type for my array backends. so want to know how can i achieve this in cinder driver? Regards Nikesh __ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
Re: [openstack-dev] what code in cinder volume driver supports volume migration between two backends of same type but having different volume types? [cinder]
Nikesh, The case you are trying is supposed to fail. You have a volume of type dothill_realstor1 which is defined to say this volume must be on backend DotHill_RealStor1. This is a requirement that you defined for that volume. Now you want to migrate it to realstor2, which is a violation of the requirement that you specified. To migrate it, you should change the volume type (retype), which changes the requirement. Thanks, Avishay On Sat, Feb 28, 2015 at 11:02 AM, Nikesh Kumar Mahalka nikeshmaha...@vedams.com wrote: I tried below link for volume migration on my driver and also similar efforts for LVM. Even whatever documents available in openstack for volume-migration,each one showing volume migration of a volume having volume type None I added host assisted volume migration function in my cinder driver. When i am trying volume migration on a volume without volume type,then my volume migration function is getting called and i am able to do volume migration. But when i am trying volume migration on a volume having volume type,then my volume migration function is not getting called. http://paste.openstack.org/show/183392/ http://paste.openstack.org/show/183405/ On Tue, Jan 20, 2015 at 12:31 AM, Nikesh Kumar Mahalka nikeshmaha...@vedams.com wrote: do cinder retype (v2) works for lvm? How to use cinder retype? I tried for volume migration from one volume-type LVM backend to another volume-type LVM backend.But its failed. How can i acheive this? Similarly i am writing a cinder volume driver for my array and want to migrate volume from one volume type to another volume type for my array backends. so want to know how can i achieve this in cinder driver? Regards Nikesh __ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev -- *Avishay Traeger* *Storage RD* Mobile: +972 54 447 1475 E-mail: avis...@stratoscale.com Web http://www.stratoscale.com/ | Blog http://www.stratoscale.com/blog/ | Twitter https://twitter.com/Stratoscale | Google+ https://plus.google.com/u/1/b/108421603458396133912/108421603458396133912/posts | Linkedin https://www.linkedin.com/company/stratoscale __ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
Re: [openstack-dev] what code in cinder volume driver supports volume migration between two backends of same type but having different volume types?
On Mon, Jan 19, 2015 at 8:01 PM, Nikesh Kumar Mahalka nikeshmaha...@vedams.com wrote: do cinder retype (v2) works for lvm? How to use cinder retype? As far as I remember, LVM doesn't really leverage volume types. What types did you define, and what command are you running? I tried for volume migration from one volume-type LVM backend to another volume-type LVM backend.But its failed. How can i acheive this? It should work. Please provide the commands you ran, the result, and all relevant logs. Similarly i am writing a cinder volume driver for my array and want to migrate volume from one volume type to another volume type for my array backends. so want to know how can i achieve this in cinder driver? There are several driver APIs that you can implement. First, you are most likely inheriting generic migration/retype from the base driver class. This works by creating a new volume, and moving data from the original to the new either using the hypervisor (for an attached volume) or by attaching both volumes to a server running cinder-volume and running dd. Your driver may be able to do more optimized migrations/retypes by implementing the respective APIs. The IBM storwize/svc driver implements both, as do several others - I suggest you look at them for examples. Thanks, Avishay -- *Avishay Traeger* *Storage RD* Mobile: +972 54 447 1475 E-mail: avis...@stratoscale.com Web http://www.stratoscale.com/ | Blog http://www.stratoscale.com/blog/ | Twitter https://twitter.com/Stratoscale | Google+ https://plus.google.com/u/1/b/108421603458396133912/108421603458396133912/posts | Linkedin https://www.linkedin.com/company/stratoscale __ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
Re: [openstack-dev] what code in cinder volume driver supports volume migration between two backends of same type but having different volume types?
On 00:31 Tue 20 Jan , Nikesh Kumar Mahalka wrote: do cinder retype (v2) works for lvm? How to use cinder retype? In the future, please have your subject prefixed with [cinder]. I tried for volume migration from one volume-type LVM backend to another volume-type LVM backend.But its failed. How can i acheive this? Please provide your cinder-api, cinder-vol, and cinder-scheduler service logs. You can paste things to http://paste.openstack.org -- Mike Perez __ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
[openstack-dev] what code in cinder volume driver supports volume migration between two backends of same type but having different volume types?
do cinder retype (v2) works for lvm? How to use cinder retype? I tried for volume migration from one volume-type LVM backend to another volume-type LVM backend.But its failed. How can i acheive this? Similarly i am writing a cinder volume driver for my array and want to migrate volume from one volume type to another volume type for my array backends. so want to know how can i achieve this in cinder driver? Regards Nikesh __ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
