ceph rbd object write is atomic?

[min fang <louisfang2013@xxxxxxxxx>]

Hi, as my understanding, ceph rbd image will be divided into multiple objects based on LBA address.

My question here is:

if two clients write to the same LBA address, such as client A write "aaaa" to LBA 0x123456, client B write "bbbb" to the same LBA.

LBA address and data  will only be in an object, not cross two objects. 

 Will ceph guarantee object data must be "aaaa" or "bbbb"? "aabb", "bbaa" will not happen even in a stripe data layout model?

thanks.

_______________________________________________
ceph-users mailing list
ceph-users@xxxxxxxxxxxxxx
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com