hi, sage will 1. you mean if i use cache tiering, client's objecter can know how to connect to osd daemon's objecter? if i can see it throught osdmap? 2. i know if rbd use cache, it use objecter, so i thought objecter is a cache for IO scatter/gather. i do not know 'COPYFROM operation ', you mention. 3. i search radosclient.cc, i know objecter is a client for osd . but for osd daemon, the code tells me osd's objecter is a listen socket. ceph-osd.cc : main: ms_objecter->bind(g_conf->public_addr) OSD:OSD :: objecter_messenger(ms_objecter) objecter_messenger->add_dispatcher_head(&service.objecter_dispatcher) , this tells me all messages received from pipes(which is accepted by objecter_messenger) are handled by Objecter::dispatch. right? no code tells me this objecter connect other osds actively. maybe i miss something. thanks At 2014-09-29 11:23:37, "Sage Weil" <sweil at redhat.com> wrote: >On Mon, 29 Sep 2014, yuelongguang wrote: >> hi,all >> 1. >> >> and who will connect it? as for osd, this ms_objecter is listen socket. >> it is not included in osdmap. so how to know ms_objecter's listen address >> and connect it. > >Ah, that's a mistake. It is only used to connect to other OSDs as a >client for the COPYFROM operation and for cache tiering. > >sage -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.ceph.com/pipermail/ceph-users-ceph.com/attachments/20140929/95f0e2d6/attachment.htm>
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