Re: [ceph-users] Kernel version for Debian 9 CephFS/RBD clients

2018-03-26 Thread Ilya Dryomov
On Fri, Mar 23, 2018 at 5:53 PM, Nicolas Huillard wrote: > Le vendredi 23 mars 2018 à 12:14 +0100, Ilya Dryomov a écrit : >> On Fri, Mar 23, 2018 at 11:48 AM, wrote: >> > The stock kernel from Debian is perfect >> > Spectre / meltdown mitigations are

Re: [ceph-users] Kernel version for Debian 9 CephFS/RBD clients

2018-03-23 Thread Nicolas Huillard
Le vendredi 23 mars 2018 à 12:14 +0100, Ilya Dryomov a écrit : > On Fri, Mar 23, 2018 at 11:48 AM,   wrote: > > The stock kernel from Debian is perfect > > Spectre / meltdown mitigations are worthless for a Ceph point of > > view, > > and should be disabled (again, strictly

Re: [ceph-users] Kernel version for Debian 9 CephFS/RBD clients

2018-03-23 Thread Ilya Dryomov
On Fri, Mar 23, 2018 at 3:01 PM, wrote: > Ok ^^ > > For Cephfs, as far as I know, quota support is not supported in kernel space > This is not specific to luminous, tho quota support is coming, hopefully in 4.17. Thanks, Ilya

Re: [ceph-users] Kernel version for Debian 9 CephFS/RBD clients

2018-03-23 Thread ceph
Ok ^^ For Cephfs, as far as I know, quota support is not supported in kernel space This is not specific to luminous, tho On 03/23/2018 03:00 PM, Ilya Dryomov wrote: > On Fri, Mar 23, 2018 at 2:18 PM, wrote: >> On 03/23/2018 12:14 PM, Ilya Dryomov wrote: >>> luminous

Re: [ceph-users] Kernel version for Debian 9 CephFS/RBD clients

2018-03-23 Thread Ilya Dryomov
On Fri, Mar 23, 2018 at 2:18 PM, wrote: > On 03/23/2018 12:14 PM, Ilya Dryomov wrote: >> luminous cluster-wide feature bits are supported since kernel 4.13. > > ? > > # uname -a > Linux abweb1 4.14.0-0.bpo.3-amd64 #1 SMP Debian 4.14.13-1~bpo9+1 > (2018-01-14) x86_64

Re: [ceph-users] Kernel version for Debian 9 CephFS/RBD clients

2018-03-23 Thread ceph
On 03/23/2018 12:14 PM, Ilya Dryomov wrote: > luminous cluster-wide feature bits are supported since kernel 4.13. ? # uname -a Linux abweb1 4.14.0-0.bpo.3-amd64 #1 SMP Debian 4.14.13-1~bpo9+1 (2018-01-14) x86_64 GNU/Linux # rbd info truc rbd image 'truc': size 20480 MB in 5120 objects

Re: [ceph-users] Kernel version for Debian 9 CephFS/RBD clients

2018-03-23 Thread Ilya Dryomov
On Fri, Mar 23, 2018 at 11:48 AM, wrote: > The stock kernel from Debian is perfect > Spectre / meltdown mitigations are worthless for a Ceph point of view, > and should be disabled (again, strictly from a Ceph point of view) > > If you need the luminous features, using the

Re: [ceph-users] Kernel version for Debian 9 CephFS/RBD clients

2018-03-23 Thread ceph
The stock kernel from Debian is perfect Spectre / meltdown mitigations are worthless for a Ceph point of view, and should be disabled (again, strictly from a Ceph point of view) If you need the luminous features, using the userspace implementations is required (librbd via rbd-nbd or qemu,

[ceph-users] Kernel version for Debian 9 CephFS/RBD clients

2018-03-23 Thread Nicolas Huillard
Hi all, I'm using Luminous 12.2.4 on all servers, with Debian stock kernel. I use the kernel cephfs/rbd on the client side, and have a choice of : * stock Debian 9 kernel 4.9 : LTS, Spectre/Meltdown mitigations in place, field-tested, probably old libceph inside. * backports kernel 4.14 :