> I was wondering about performance differences between cephfs and rbd, so > I deviced this quick test. The results were pretty surprising to me. > > The test: on a very idle machine, make 2 mounts. One is a cephfs mount, > the other an rbd mount. In each directory, copy a humongous .tgz file > (1.5 TB) and try to untar the file into the directory. The untar on the > cephfs directory took slightly over 2 hours, but on the rbd directory it > took almost a whole day. I repeated the test 3 times and the results > were similar each time. Is there something I'm missing? Is RBD that much > slower than cephfs (or is cephfs that much faster than RBD)? Are there > any tuning options I can try to improve RBD performance? > When I was testing between using cephfs or rbd in a vm, I noticed that cephfs was around 25% faster, was on Luminous. _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
 |