On Mon, Dec 7, 2015 at 1:52 PM, Wuxiangwei <wuxiang...@h3c.com> wrote: > Thanks Yan, what if we wanna see some more specific or detailed information? > E.g. with cephfs we may run 'cephfs /mnt/a.txt show_location --offset' to > find the location of a given offset. >
When using default layout, object size is 4M, (offset / 4194304) is subfix of object name. For example. offset 0 is located in object <inode number in hex>.00000000, offset 4194304 is located in object <inode number in hex>.0000001. For fancy layout, please read http://docs.ceph.com/docs/master/dev/file-striping/ > ----------------------- > Wu Xiangwei > Tel : 0571-86760875 > 2014 UIS 2, TEAM BORE > > > -----邮件原件----- > 发件人: Yan, Zheng [mailto:uker...@gmail.com] > 发送时间: 2015年12月7日 11:22 > 收件人: wuxiangwei 09660 (RD) > 抄送: ceph-de...@vger.kernel.org; ceph-users@lists.ceph.com > 主题: Re: how to see file object-mappings for cephfuse client > > On Mon, Dec 7, 2015 at 10:51 AM, Wuxiangwei <wuxiang...@h3c.com> wrote: >> Hi, Everyone >> >> Recently I'm trying to figure out how to use ceph-fuse. If we mount cephfs >> as the kernel client, there is a 'cephfs' command tool (though it seems to >> be 'deprecated') with 'map' and 'show_location' commands to show the RADOS >> objects belonging to a given file. However, it doesn't work well for >> ceph-fuse, neither can I find a similar tool to see the mappings. Any >> suggestions? >> Thank you! > > Rados objects for a give inode is in form <inode number in hex>.xxxxxxxx. > > To get a file's layout, you can use getfattr -n ceph.file.layout <file name> > > To find a given object is stored on which OSDs, you can use command, ceph osd > map <cephfs data pool> <object name> > >> >> >> ----------------------- >> Wu Xiangwei >> Tel : 0571-86760875 >> 2014 UIS 2, TEAM BORE >> >> -- >> To unsubscribe from this list: send the line "unsubscribe ceph-devel" >> in the body of a message to majord...@vger.kernel.org More majordomo >> info at http://vger.kernel.org/majordomo-info.html _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
