On Wed, 5 Nov 2014, Wei-Chung Cheng wrote: > 2014-11-04 17:11 GMT+08:00 Sage Weil <sage@xxxxxxxxxxxx>: > > On Tue, 4 Nov 2014, Cheng Wei-Chung wrote: > >> Dear all: > >> > >> I know that the default precise repo did not have libgoogle-perftools4. > >> It should only have libgoogle-perftools0. > >> In the situation that we add the Ubuntu Cloud Archive will bring > >> libgoogle-perftools4 with havana icehouse, juno and later version. > >> It will make conflict with ceph if we have other softwares like > >> mongodb that depends on libgoogle-perftools4. > >> > >> I found the following feature: > >> http://tracker.ceph.com/issues/8039 > >> Is this feature still haven't done, right? > > > > Right, it's not done yet. > > OK, could I help to complete it? 1- Patches to update ceph.spec.in and debian/control - make sure it is available and builds on all of the supported platforms (precise, trusty, el6, el7, fc20) 2- QA 3- Test upgrade path > >> I try to build the ceph version 0.87 with libgoogle-perftools4 and > >> upgrade from firefly in my test environment. > >> > >> It looks work normally. I think ceph can work on > >> libgoogle-perftools0/libgoogle-perftools4. > > > > Great! It just needs patches to the packaging files, to go through > > testing, and then we need to make backported packages (possibly/probably) > > for a few older distros. > > > > It will be a bit awkward to to changed this for a stable release like > > firefly, though. How disruptive will that be? > > > > sage > > I also have simple I/O tests with openstack in my environment this weekend. > If these tests are OK, I think we could make backported packages and > test it again? > > for change from a stable relase: > In my solution, I make sure the other ceph nodes and OSD processes are alive. > Upgrade only one node in the same time, because it will make some osd down for > a while due to removing ceph with libgoogle-perftools0. > In this stage, we need to remove libgoogle-perftools0 and install > libgoogle-perftools4 > and its releated package. > > After that, install a new ceph package and OSDs will resume working normally. I don't think there should be a problem with the upgrade itself.. the 0 and 4 versions are different files and IIRC you can even have multiple versions install simultaneously. Mostly I'm worried about issues with the package management during upgrade. I don't think it should be a problem but it needs to be tested. The bigger issue is that for a stable release like firefly or dumpilng, this is potentially a "big" change in a stable series that is supposed to be getting minimal fixes. Any opinions here? sage -- 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
