Am 12.02.2014 20:27, schrieb Michael: > Have always wondered this, why does data get shuffled twice when you delete an > OSD? You out an OSD and the data gets moved to other nodes - understandable > but then when you remove that OSD from crush it moves data again, aren't outed > OSD's and an OSD's not in crush the same from a data position point of view? > What data is being moved when a fully outed OSD is then removed from crush? I second this. When I adhere to the OSD removal how-to[1], I see heavy data migration taking place twice. This is a nuisance. The last time I had to take an OSD out of a cluster, I marked it "out" and removed it from the CRUSH map at the same time. Don't know if this is the recommended way but it seemed to work. Regards Christian [1] http://ceph.com/docs/master/rados/operations/add-or-rm-osds/#removing-osds-manual -- Dipl.-Inf. Christian Kauhaus <>< · kc@xxxxxxxxxx · systems administration gocept gmbh & co. kg · Forsterstraße 29 · 06112 Halle (Saale) · Germany http://gocept.com · tel +49 345 219401-11 Python, Pyramid, Plone, Zope · consulting, development, hosting, operations
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