Re: [ceph-users] Upcoming Erasure coding

2013-12-26 Thread Christian Balzer
Hello, On Tue, 24 Dec 2013 16:33:49 +0100 Loic Dachary wrote: > > > On 24/12/2013 10:22, Wido den Hollander wrote: > > On 12/24/2013 09:34 AM, Christian Balzer wrote: > >> > >> Hello Loic, > >> > >> On Tue, 24 Dec 2013 08:29:38 +0100 Loic Dachary wrote: > >> > >>> > >>> > >>> On 24/12/2013 05:4

Re: [ceph-users] Upcoming Erasure coding

2013-12-25 Thread Wido den Hollander
On 12/24/2013 11:16 PM, Mark Kirkwood wrote: On 25/12/13 04:33, Loic Dachary wrote: On 24/12/2013 10:22, Wido den Hollander wrote: IIRC Erasure Encoding doesn't work well with RBD, if it even works at all due to the fact that you can't update a object, but you have to completely rewrite the

Re: [ceph-users] Upcoming Erasure coding

2013-12-24 Thread Mark Kirkwood
On 25/12/13 04:33, Loic Dachary wrote: On 24/12/2013 10:22, Wido den Hollander wrote: IIRC Erasure Encoding doesn't work well with RBD, if it even works at all due to the fact that you can't update a object, but you have to completely rewrite the whole object. So Erasure encoding works gre

Re: [ceph-users] Upcoming Erasure coding

2013-12-24 Thread Loic Dachary
On 24/12/2013 10:22, Wido den Hollander wrote: > On 12/24/2013 09:34 AM, Christian Balzer wrote: >> >> Hello Loic, >> >> On Tue, 24 Dec 2013 08:29:38 +0100 Loic Dachary wrote: >> >>> >>> >>> On 24/12/2013 05:42, Christian Balzer wrote: Hello, from what has been written on the

Re: [ceph-users] Upcoming Erasure coding

2013-12-24 Thread Loic Dachary
On 24/12/2013 09:34, Christian Balzer wrote: > > Hello Loic, > > On Tue, 24 Dec 2013 08:29:38 +0100 Loic Dachary wrote: > >> >> >> On 24/12/2013 05:42, Christian Balzer wrote: >>> >>> Hello, >>> >>> from what has been written on the roadmap page and here, I assume that >>> the erasure coding o

Re: [ceph-users] Upcoming Erasure coding

2013-12-24 Thread Wido den Hollander
On 12/24/2013 09:34 AM, Christian Balzer wrote: Hello Loic, On Tue, 24 Dec 2013 08:29:38 +0100 Loic Dachary wrote: On 24/12/2013 05:42, Christian Balzer wrote: Hello, from what has been written on the roadmap page and here, I assume that the erasure coding option with Firefly will be (un

Re: [ceph-users] Upcoming Erasure coding

2013-12-24 Thread Christian Balzer
Hello Loic, On Tue, 24 Dec 2013 08:29:38 +0100 Loic Dachary wrote: > > > On 24/12/2013 05:42, Christian Balzer wrote: > > > > Hello, > > > > from what has been written on the roadmap page and here, I assume that > > the erasure coding option with Firefly will be (unsurprisingly) a pool > > o

Re: [ceph-users] Upcoming Erasure coding

2013-12-23 Thread Loic Dachary
On 24/12/2013 05:42, Christian Balzer wrote: > > Hello, > > from what has been written on the roadmap page and here, I assume that the > erasure coding option with Firefly will be (unsurprisingly) a pool option. Hi Christian, You are correct. It is set when a pool of type "erasure" is created

[ceph-users] Upcoming Erasure coding

2013-12-23 Thread Christian Balzer
Hello, from what has been written on the roadmap page and here, I assume that the erasure coding option with Firefly will be (unsurprisingly) a pool option. Given the nature of this beast I doubt that it can just be switched on with a live pool, right? If so, what are the thoughts/plans to allo