Thanks! It seems less intuitive than crush class create, but should work well enough.
Get Outlook for Android<https://aka.ms/ghei36> ________________________________ From: ceph-users <ceph-users-boun...@lists.ceph.com> on behalf of xie.xing...@zte.com.cn <xie.xing...@zte.com.cn> Sent: Saturday, November 4, 2017 12:22:31 PM To: caspars...@supernas.eu; bhubb...@redhat.com Cc: ceph-users@lists.ceph.com Subject: [ceph-users] 答复: Re: Luminous LTS: `ceph osd crush class create` isgone? > With the caveat that the "ceph osd crush set-device-class" command only works > on existing OSD's which already have a default assigned class so you cannot > plan/create your classes before > adding some OSD's first. > The "ceph osd crush class create" command could be run without any OSD's > configured. That is not true. "ceph osd crush set-device-class" will fail if the input OSD has already been assigned a class. Instead you should do "ceph osd crush rm-device-class" before proceeding. Generally you don't have to pre-create an empty class and associate some specific OSDs with that class through "ceph osd crush set-device-class" later, as the command will automatically create it if it does not exist. Also you can simply disable the "auto-class" feature by setting "osd_class_update_on_start" to false, and then newly created OSDs will be bound to no class(e.g., hdd/ssd). Otherwise you have to do "ceph osd crush rm-device-class" before you can safely reset OSDs' class to any freeform as you wish. 原始邮件 发件人： <caspars...@supernas.eu>; 收件人： <ceph-users@lists.ceph.com>; 日 期 ：2017年11月03日 17:41 主 题 ：Re: [ceph-users] Luminous LTS: `ceph osd crush class create` isgone? 2017-11-03 7:59 GMT+01:00 Brad Hubbard <bhubb...@redhat.com<mailto:bhubb...@redhat.com>>: On Fri, Nov 3, 2017 at 4:04 PM, Linh Vu <v...@unimelb.edu.au<mailto:v...@unimelb.edu.au>> wrote: > Hi all, > > > Back in Luminous Dev and RC, I was able to do this: > > > `ceph osd crush class create myclass` This was removed as part of https://github.com/ceph/ceph/pull/16388 It looks like the set-device-class command is the replacement or equivalent.. $ ceph osd crush class ls [ "ssd" ] $ ceph osd crush set-device-class myclass 0 1 $ ceph osd crush class ls [ "ssd", "myclass" ] With the caveat that the "ceph osd crush set-device-class" command only works on existing OSD's which already have a default assigned class so you cannot plan/create your classes before adding some OSD's first. The "ceph osd crush class create" command could be run without any OSD's configured. Kind regards, Caspar > > > so I could utilise the new CRUSH device classes feature as described here: > http://ceph.com/community/new-luminous-crush-device-classes/<http://ceph.com/community/new-luminous-crush-device-classes/> > > > > and in use here: > http://blog-fromsomedude.rhcloud.com/2017/05/16/Luminous-series-CRUSH-devices-class/<http://blog-fromsomedude.rhcloud.com/2017/05/16/Luminous-series-CRUSH-devices-class/> > > > Now I'm on Luminous LTS 12.2.1 and my custom device classes are still seen > in: > > > `ceph osd crush class ls` > > > `ceph osd tree` and so on. The cluster is working fine and healthy. > > > However, when I run `ceph osd crush class create myclass2` now, it tells me > the command doesn't exist anymore. > > > Are we not meant to create custom device classes anymore? > > > Regards, > > Linh > > > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com<mailto:ceph-users@lists.ceph.com> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com<http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com> > -- Cheers, Brad _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com<mailto:ceph-users@lists.ceph.com> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com<http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com>
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