Re: [Openstack] [Swift] Erasure code durability and overhead in small clusters

2018-03-13 Thread Mark Kirkwood
On 14/03/18 11:47, Clay Gerrard wrote: On Tue, Mar 13, 2018 at 3:05 PM, Mark Kirkwood mailto:mark.kirkw...@catalyst.net.nz>> wrote: To me this suggests that a certain minimum number of *hosts* per region is needed for a given EC policy to be durable in the advent of host outage

[Openstack] Poll: S Release Naming

2018-03-13 Thread Paul Belanger
Greetings all, It is time again to cast your vote for the naming of the S Release. This time is little different as we've decided to use a public polling option over per user private URLs for voting. This means, everybody should proceed to use the following URL to cast their vote: https://civs

Re: [Openstack] [Swift] Erasure code durability and overhead in small clusters

2018-03-13 Thread Clay Gerrard
On Tue, Mar 13, 2018 at 3:05 PM, Mark Kirkwood < mark.kirkw...@catalyst.net.nz> wrote: > To me this suggests that a certain minimum number of *hosts* per region is > needed for a given EC policy to be durable in the advent of host outage (or > destruction). Is this correct - or have a flubbed the

[Openstack] [Swift] Erasure code durability and overhead in small clusters

2018-03-13 Thread Mark Kirkwood
Hi, I'm looking at adding per-region Erasure code policies to our Swift cluster. Currently I'm experimenting with a small one - 3 hosts per region (each with 6 devices). Doing some experimentation seems to have highlighted a subtle relation between desire to minimize overhead and durability t

[Openstack] [Scientific] IRC Meeting March 14th 2018 1100 UTC in channel #openstack-meeting

2018-03-13 Thread Martial Michel
Hello, We will have our IRC meeting in the #openstack-meeting channel at 1100 UTC March 14th. Agenda is at: https://wiki.openstack.org/wiki/Scientific_SIG#IRC_Meeting_March_14th_2018 All are welcome. Looking forward to seeing you there -- Martial ___ Ma

Re: [Openstack] Nova + LXD + Ceph?

2018-03-13 Thread Torin Woltjer
Thank you for the response James. I now have a couple of further questions regarding boot volume support on nova-lxd. Is this feature on the radar? On nova-kvm documentation states you need shared storage for live migration; is this the same case with nova-lxd, or can you live migrate between c

Re: [Openstack] Nova + LXD + Ceph?

2018-03-13 Thread James Page
Hi Torin On Mon, 12 Mar 2018 at 21:52, Torin Woltjer wrote: > Hello, > > I am looking to deploy an openstack cluster using LXD for compute and Ceph > for storage, and I was running into some doubt as to whether this was > possible; and doubt that nova-lxd was mature enough for production. If > a