Is the 12.2.1 really stable? Anybody have production cluster with Luminous Bluestore?

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Hi cephers.
Some thoughts...
At this time my cluster on Kraken 11.2.0 - works smooth with FileStore and RBD only. I want upgrade to Luminous 12.2.1 and go to Bluestore because this cluster want grows double with new disks, so is best opportunity migrate to Bluestore.

In ML I was found two problems:
1. Increased memory usage, should be fixed in upstream (http://lists.ceph.com/pipermail/ceph-users-ceph.com/2017-October/021676.html). 2. OSD drops and goes cluster offline (http://lists.ceph.com/pipermail/ceph-users-ceph.com/2017-November/022494.html). Don't know this Bluestore or FileStore OSD'.s.

If the first case I can safely survive - hosts has enough memory to go to Bluestore and with the growing I can wait until the next stable release. That second case really scares me. As I understood clusters with this problem for now not in production.

By this point I have completed all the preparations for the update and now I need to figure out whether I should update to 12.2.1 or wait for the next stable release, because my cluster is in production and I can't fail. Or I can upgrade and use FileStore until next release, this is acceptable for me.

Thanks.
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