On Wed, 20 Feb 2013, S?awomir Skowron wrote: > Like i say, yes. Now it is only option, to migrate data from one > cluster to other, and now it must be enough, with some auto features. > > But is there any timeline, or any brainstorming in ceph internal > meetings, about any possible replication in block level, or something > like that ?? I would like to get this in for cuttlefish (0.61). See #4207 for the underlying rados bits. We also need to settle the file format discussion; any input there would be appreciated! sage > > On 20 lut 2013, at 17:33, Sage Weil <sage@xxxxxxxxxxx> wrote: > > > On Wed, 20 Feb 2013, S?awomir Skowron wrote: > >> My requirement is to have full disaster recovery, buisness continuity, > >> and failover of automatet services on second Datacenter, and not on > >> same ceph cluster. > >> Datacenters have 10GE dedicated link, for communication, and there is > >> option to expand cluster into two DataCenters, but it is not what i > >> mean. > >> There are advantages of this option like fast snapshots, and fast > >> switch of services, but there are some problems. > >> > >> When we talk about disaster recovery i mean that whole storage cluster > >> have problems, not only services at top of storage. I am thinking > >> about bug, or mistake of admin, that makes cluster not accessible in > >> any copy, or a upgrade that makes data corruption, or upgrade that is > >> disruptive for services - auto failover services into another DC, > >> before upgrade cluster. > >> > >> If cluster have a solution to replicate data in rbd images to next > >> cluster, than, only data are migrated, and when disaster comes, than > >> there is no need to work on last imported snapshot (there can be > >> constantly imported snapshot with minutes, or hour, before last > >> production), but work on data from now. And when we have automated > >> solution to recover DB (one of app service on top of rbd) clusters in > >> new datacenter infrastructure, than we have a real disaster recovery > >> solution. > >> > >> That's why we made, a s3 api layer synchronization to another DC, and > >> Amazon, and only RBD is left. > > > > Have you read the thread from Jens last week, 'snapshot, clone and mount a > > VM-Image'? Would this type of capability capture you're requirements? > > > > sage > > > >> > >> Dnia 19 lut 2013 o godz. 10:23 "S?bastien Han" > >> <han.sebastien@xxxxxxxxx> napisa?(a): > >> > >>> Hi, > >>> > >>> For of all, I have some questions about your setup: > >>> > >>> * What are your requirements? > >>> * Are the DCs far from each others? > >>> > >>> If they are reasonably close to each others, you can setup a single > >>> cluster, with replicas across both DCs and manage the RBD devices with > >>> pacemaker. > >>> > >>> Cheers. > >>> > >>> -- > >>> Regards, > >>> S?bastien Han. > >>> > >>> > >>> On Mon, Feb 18, 2013 at 3:20 PM, S?awomir Skowron <szibis@xxxxxxxxx> wrote: > >>>> Hi, Sorry for very late response, but i was sick. > >>>> > >>>> Our case is to make a failover rbd instance in another cluster. We are > >>>> storing block device images, for some services like Database. We need > >>>> to have a two clusters, synchronized, for a quick failover, if first > >>>> cluster goes down, or for upgrade with restart, or many other cases. > >>>> > >>>> Volumes are in many sizes: 1-500GB > >>>> external block device for kvm vm, like EBS. > >>>> > >>>> On Mon, Feb 18, 2013 at 3:07 PM, S?awomir Skowron <szibis@xxxxxxxxx> wrote: > >>>>> Hi, Sorry for very late response, but i was sick. > >>>>> > >>>>> Our case is to make a failover rbd instance in another cluster. We are > >>>>> storing block device images, for some services like Database. We need to > >>>>> have a two clusters, synchronized, for a quick failover, if first cluster > >>>>> goes down, or for upgrade with restart, or many other cases. > >>>>> > >>>>> Volumes are in many sizes: 1-500GB > >>>>> external block device for kvm vm, like EBS. > >>>>> > >>>>> > >>>>> On Fri, Feb 1, 2013 at 12:27 AM, Neil Levine <neil.levine@xxxxxxxxxxx> > >>>>> wrote: > >>>>>> > >>>>>> Skowron, > >>>>>> > >>>>>> Can you go into a bit more detail on your specific use-case? What type > >>>>>> of data are you storing in rbd (type, volume)? > >>>>>> > >>>>>> Neil > >>>>>> > >>>>>> On Wed, Jan 30, 2013 at 10:42 PM, Skowron S?awomir > >>>>>> <slawomir.skowron@xxxxxxxxxxxx> wrote: > >>>>>>> I make new thread, because i think it's a diffrent case. > >>>>>>> > >>>>>>> We have managed async geo-replication of s3 service, beetwen two ceph > >>>>>>> clusters in two DC's, and to amazon s3 as third. All this via s3 API. I love > >>>>>>> to see native RGW geo-replication with described features in another thread. > >>>>>>> > >>>>>>> There is another case. What about RBD replication ?? It's much more > >>>>>>> complicated, and for disaster recovery much more important, just like in > >>>>>>> enterprise storage arrays. > >>>>>>> One cluster in two DC's, not solving problem, because we need security > >>>>>>> in data consistency, and isolation. > >>>>>>> Do you thinking about this case ?? > >>>>>>> > >>>>>>> Regards > >>>>>>> Slawomir Skowron-- > >>>>>>> To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > >>>>>>> the body of a message to majordomo@xxxxxxxxxxxxxxx > >>>>>>> More majordomo info at http://vger.kernel.org/majordomo-info.html > >>>>>> -- > >>>>>> To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > >>>>>> the body of a message to majordomo@xxxxxxxxxxxxxxx > >>>>>> More majordomo info at http://vger.kernel.org/majordomo-info.html > >>>>> > >>>>> > >>>>> > >>>>> > >>>>> -- > >>>>> ----- > >>>>> Pozdrawiam > >>>>> > >>>>> S?awek "sZiBis" Skowron > >>>> > >>>> > >>>> > >>>> -- > >>>> ----- > >>>> Pozdrawiam > >>>> > >>>> S?awek "sZiBis" Skowron > >>>> -- > >>>> To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > >>>> the body of a message to majordomo@xxxxxxxxxxxxxxx > >>>> More majordomo info at http://vger.kernel.org/majordomo-info.html > >> -- > >> To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > >> the body of a message to majordomo@xxxxxxxxxxxxxxx > >> More majordomo info at http://vger.kernel.org/majordomo-info.html > >> > >> > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > > -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
