Also, wouldn't this help in case of some kind of write coalescing for librbd/librados and sending one transaction down in case of multiple ? Thanks & Regards Somnath -----Original Message----- From: ceph-devel-owner@xxxxxxxxxxxxxxx [mailto:ceph-devel-owner@xxxxxxxxxxxxxxx] On Behalf Of Yehuda Sadeh-Weinraub Sent: Friday, June 12, 2015 3:21 PM To: Samuel Just Cc: ceph-devel Subject: Re: Rados multi-object transaction use cases ----- Original Message ----- > From: "Samuel Just" <sjust@xxxxxxxxxx> > To: "ceph-devel" <ceph-devel@xxxxxxxxxxxxxxx> > Sent: Friday, June 12, 2015 3:15:02 PM > Subject: Rados multi-object transaction use cases > > In the Infernalis CDS, we had a session on RADOS multi-object transactions. > I'd like to continue the discussion at the upcoming Jewel CDS. I > thought I'd prime the discussion by asking: if librados supported > multi-object read and write transactions, what would you use them for? > Some idea of use cases would be valuable when considering things like deadlock coping strategies. Here are a few for rgw: - update bucket index when creating / modifying / deleting an object - store multiple metadata objects atomically: e.g., user info + user access keys + user email (currently not atomic) - store bucket entry point + bucket instance info atomically - creating a bucket and adding it to the user's list of buckets Yehuda -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html ________________________________ PLEASE NOTE: The information contained in this electronic mail message is intended only for the use of the designated recipient(s) named above. If the reader of this message is not the intended recipient, you are hereby notified that you have received this message in error and that any review, dissemination, distribution, or copying of this message is strictly prohibited. If you have received this communication in error, please notify the sender by telephone or e-mail (as shown above) immediately and destroy any and all copies of this message in your possession (whether hard copies or electronically stored copies). ��.n��������+%������w��{.n����z��u���ܨ}���Ơz�j:+v�����w����ޙ��&�)ߡ�a����z�ޗ���ݢj��w�f
