Hi all, so, I'm wondering right now (with some urgency, ahem) how to make RBD on EC pools faster without resorting to cache tiering. In a replicated pool, we had some success with RBD striping. I wonder if it would be possible to align RBD stripe-unit with the EC chunk size ...? Is that worth pursuing at all? How would one best go about this? (I also wonder if the http://docs.ceph.com/docs/master/rados/operations/erasure-code-profile/ description of stripe_unit / stripe_width is wrong - shouldn't that be the number of data+coding chunks, instead of just data chunks? They need to go somewhere, right?) Align k+m and RBD's object_size / (stripe-unit * stripe_count)? Regards, Lars -- SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg) "Architects should open possibilities and not determine everything." (Ueli Zbinden) _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
 |