I cannot go into detail about how or where your particular system is writing files. All I can reiterate is that bbd images can only be mounted to one host at a time, unless you're using a cluster aware file system.
Hope that helps! -Mike -----Original Message----- From: mail list [mailto:louis.hust...@gmail.com] Sent: Tuesday, November 25, 2014 8:27 PM To: Michael Kuriger Cc: ceph-us...@ceph.com Subject: Re: [ceph-users] Question about mount the same rbd in different machine Hi Michael, I write the same file with different content, and there is no hint for overwrite, so when the corrupt will appear? On Nov 26, 2014, at 12:23, Michael Kuriger <mk7...@yp.com> wrote: > Each server mounting the rbd device thinks it's the only server writing to > it. They are not aware of the other server and therefore will overwrite and > corrupt the filesystem as soon as each server writes a file. > > -----Original Message----- > From: mail list [mailto:louis.hust...@gmail.com] > Sent: Tuesday, November 25, 2014 8:11 PM > To: Michael Kuriger > Cc: ceph-us...@ceph.com > Subject: Re: [ceph-users] Question about mount the same rbd in different > machine > > hi, > > But i have touched the same file on the two machine under the same rbi with > no error. > will it cause some problem or just not suggested but can do? > > On Nov 26, 2014, at 12:08, Michael Kuriger <mk7...@yp.com> wrote: > >> You can't write from 2 nodes mounted to the same rbd at the same time >> without a cluster aware file system. >> >> >> >> -----Original Message----- >> From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of >> mail list >> Sent: Tuesday, November 25, 2014 7:30 PM >> To: ceph-us...@ceph.com >> Subject: [ceph-users] Question about mount the same rbd in different machine >> >> Hi, all >> >> I create a rbd named foo, and then map it and mount on two different >> machine, and when i touch a file on the machine A, machine B can not see the >> new file, and machine B can also touch a same file! >> >> I want to know if the rbd the same on machine A and B? or exactly they are >> two rbd? >> >> Any idea will be appreciate! >> _______________________________________________ >> ceph-users mailing list >> ceph-users@lists.ceph.com >> https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.ceph.com_listinfo.cgi_ceph-2Dusers-2Dceph.com&d=AAICAg&c=lXkdEK1PC7UK9oKA-BBSI8p1AamzLOSncm6Vfn0C_UQ&r=CSYA9OS6Qd7fQySI2LDvlQ&m=Xr6ISOkb1Lr6Bkl1PP_iLNTxnz38NvS2tI3k_MDbARA&s=IFerPncrFNxmE2_vwEv8X-XVezPfATstmGR6FL8jmaU&e= >> > _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
