Re: [ceph-users] advice with erasure coding

2018-09-25 Thread Paul Emmerich
VMs on erasure coded SSDs with fast_read work fine since 12.2.2. Paul Am Sa., 8. Sep. 2018 um 18:17 Uhr schrieb David Turner : > > I tested running VMs on EC back in Hammer. The performance was just bad. I > didn't even need much io, but even performing standard maintenance was > annoying enoug

Re: [ceph-users] advice with erasure coding

2018-09-08 Thread David Turner
I tested running VMs on EC back in Hammer. The performance was just bad. I didn't even need much io, but even performing standard maintenance was annoying enough that I abandoned the idea. I didn't really try to tweak settings to make it work and I only had a 3 node cluster running 2+1. I did use i

Re: [ceph-users] advice with erasure coding

2018-09-07 Thread Maged Mokhtar
On 2018-09-07 13:52, Janne Johansson wrote: > Den fre 7 sep. 2018 kl 13:44 skrev Maged Mokhtar : > >> Good day Cephers, >> >> I want to get some guidance on erasure coding, the docs do state the >> different plugins and settings but to really understand them all and their >> use cases is not

Re: [ceph-users] advice with erasure coding

2018-09-07 Thread Janne Johansson
Den fre 7 sep. 2018 kl 13:44 skrev Maged Mokhtar : > > Good day Cephers, > > I want to get some guidance on erasure coding, the docs do state the > different plugins and settings but to really understand them all and their > use cases is not easy: > > -Are the majority of implementations using jer

[ceph-users] advice with erasure coding

2018-09-07 Thread Maged Mokhtar
Good day Cephers, I want to get some guidance on erasure coding, the docs do state the different plugins and settings but to really understand them all and their use cases is not easy: -Are the majority of implementations using jerasure and just configuring k and m ? -For jerasure: when/if woul