Hello, file -> many objects-> many PG(each pg has two copies, because your replication count is two)-> many OSD pgs can be distributed in OSDs, no limitation for only 2, replication count 2only determine pg copies is 2.
Hope this will help. > 在 2018年8月2日，下午3:43，Surya Bala <sooriya.ba...@gmail.com> 写道： > > Hi folks, > > From the ceph documents i understood about PG and why should PG number should > be optimal. But i dont find any info about the below point > > I am using cephfs client in my ceph cluster. When we store a file(consider > replication count is 2) , it will be splitted into objects and each object > will be stored in different PG and each PG will be mapped to a OSD. It means > there can be many OSD for a single file . But why are we getting only 2 OSDs > by the command 'ceph OSD map' > > file -> many objects-> many PG-> many OSD > > Is that all objects of a file will be stored in only 2 OSD(in case of > replication count is 2)? > > Regards > Surya Balan > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
