Assuming your regions are pretty close to the same size, that's exactly what you'll get with 3 replicas across 2 regions. Some data will have 2 replicas in region 1 and one in region 2. Other data will have 1 in region 1 and 2 in region 2.
--John > On Dec 16, 2014, at 9:39 AM, Amit Anand <aan...@viimed.com> wrote: > > Ok cool Ill wait it out see what happens. So now I have another stupid > question - after all is said and done, how many copies of my data will I > have?! What I am aiming for is something like 2 regions and 3 replicas ie, 2 > copies of the data in region one and one copy in region 2. > > On Tue, Dec 16, 2014 at 12:35 PM, John Dickinson <m...@not.mn> wrote: > That's normal. See the "...or none can be due to min_part_hours". Swift is > refusing to move more data until the stuff likely currently in flight has > settled. See https://swiftstack.com/blog/2012/04/09/swift-capacity-management/ > > --John > > > > > > > > On Dec 16, 2014, at 9:09 AM, Amit Anand <aan...@viimed.com> wrote: > > > > Hi John thank you! > > > > So I went ahead and added two more storage nodes to the existing rings > > (object, account, container) and tried to rebalance on the controller I got > > this: > > > > [root@controller swift]# swift-ring-builder object.builder rebalance > > Reassigned 1024 (100.00%) partitions. Balance is now 38.80. > > ------------------------------------------------------------------------------- > > NOTE: Balance of 38.80 indicates you should push this > > ring, wait at least 1 hours, and rebalance/repush. > > ------------------------------------------------------------------------------- > > > > > > For all three. So while waiting, I went ahead and added the *.gz files and > > swift.conf to the new nodes and started the Object Storage Services on the > > both the new storage nodes.... Now I am seeing this after I try to > > rebalance after waiting about an hour: > > > > [root@controller swift]# swift-ring-builder object.builder rebalance > > No partitions could be reassigned. > > Either none need to be or none can be due to min_part_hours [1]. > > > > Devices 4,5,6,7 are the new ones I added in region 2. > > > > > > [root@controller swift]# swift-ring-builder object.builder > > object.builder, build version 9 > > 1024 partitions, 3.000000 replicas, 2 regions, 2 zones, 8 devices, 38.80 > > balance > > The minimum number of hours before a partition can be reassigned is 1 > > Devices: id region zone ip address port replication ip > > replication port name weight partitions balance meta > > 0 1 1 10.7.5.51 6000 10.7.5.51 > > 6000 sda3 100.00 501 30.47 > > 1 1 1 10.7.5.51 6000 10.7.5.51 > > 6000 sda4 100.00 533 38.80 > > 2 1 1 10.7.5.52 6000 10.7.5.52 > > 6000 sda3 100.00 512 33.33 > > 3 1 1 10.7.5.52 6000 10.7.5.52 > > 6000 sda4 100.00 502 30.73 > > 4 2 1 10.7.5.53 6000 10.7.5.53 > > 6000 sda3 100.00 256 -33.33 > > 5 2 1 10.7.5.53 6000 10.7.5.53 > > 6000 sda4 100.00 256 -33.33 > > 6 2 1 10.7.5.54 6000 10.7.5.54 > > 6000 sda3 100.00 256 -33.33 > > 7 2 1 10.7.5.54 6000 10.7.5.54 > > 6000 sda4 100.00 256 -33.33 > > > > > > > > All three have -33.33 (container, object, account) for their balance. Is > > this normal or did do something incorrect? It doesnt seem to be replicating > > the data to the new nodes (or at least it looks like it stopped?) but I am > > not sure. Would appreciate any insight. Thanks! > > > > Amit > > > > > > > > > > On Mon, Dec 15, 2014 at 1:49 PM, John Dickinson <m...@not.mn> wrote: > > Sounds like you're looking for a global cluster. You don't need multiple > > rings for this. Swift can support this. When you add a new device to a > > ring, you add it in a different region, and Swift takes care of it for you. > > > > Here's some more information: > > > > http://docs.openstack.org/developer/swift/admin_guide.html#geographically-distributed-clusters > > https://www.youtube.com/watch?v=mcaTwhP_rPE > > https://www.youtube.com/watch?v=LpmBRqevuVU > > > > https://swiftstack.com/blog/2013/07/02/swift-1-9-0-release/ > > https://swiftstack.com/blog/2012/09/16/globally-distributed-openstack-swift-cluster/ > > https://www.swiftstack.com/docs/admin/cluster_management/regions.html > > > > > > > > --John > > > > > > > > > > > > > On Dec 15, 2014, at 10:15 AM, Amit Anand <aan...@viimed.com> wrote: > > > > > > Hi all, > > > > > > I was wondering if anyone knew of any good blog posts and videos that > > > could show/explain what I am trying to do. I have Juno setup and it > > > working great (thanks to everyone on heres help)! Now, I would like to > > > add two more Object Store nodes, but as a separate "datacenter" as it > > > were and replicate between my existing ring and the new one. Now, Im not > > > sure exactly what to do for the account/container/object rings and how to > > > get them to replicate (so if one goes down the other will still continue > > > to serve data). I am also going to try and add another storage node just > > > as a backup for existing data. Would anyone have any good links to send > > > me I would appreciate it! > > > > > > Thanks! > > > Amit Anand > > > _______________________________________________ > > > Mailing list: > > > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > > > Post to : openstack@lists.openstack.org > > > Unsubscribe : > > > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > > > > > >
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