A while back we merged Haomai's experimental OSD backend KeyValueStore. We named the config option 'keyvaluestore_dev', hoping to make it clear to users that it was still under development, not fully tested, and not yet ready for production. In retrospect, I don't think '_dev' was sufficiently scary because many users tried it and ran into unexpectd trouble. There are several other features we've recently added or are considering adding that fall into this category. Having them in the tree is great because it streamlines QA and testing, but I want to make sure that users are not able to enable the features without being aware of the risks. A few possible suggestions: - scarier option names, like osd objectstore = keyvaluestore_experimental_danger_danger ms type = async_experimental_danger_danger ms type = xio_experimental_danger_danger Once the feature becomes stable, they'll have to adjust their config, or we'll need to support both names going forward. - a separate config option that allows any experimental option allow experimental features danger danger = true osd objectstore = keyvaluestore ms type = xio This runs the risk that the user will enable experimental features to get X, and later start using Y without realizing Y is also experiemental. - enumerate experiemntal options we want to enable allow experimental features danger danger = keyvaluestore, xio ms type = xio osd objectstore = keyvaluestore This has the property that no config change is necessary when the feature drops its experimental status. In all of these cases, we can also make a point of sending something to the log on daemon startup. I don't think too many people will notice this, but it is better than nothing. Other ideas? sage _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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