Yes, I know that section of the docs, but can't find how to change the crush rules after "ceph osd crush tunables ...". Could you give me a hint? Another question, if I may: Would you recommend going from my ancient tunables to hammer directly (or even to jewel, if I can get the clients updated) directly? Or should I do it in steps? Thanks for all the help! Oliver On 06/21/2018 04:17 PM, Paul Emmerich wrote:
Your CRUSH rules will not change automatically. Check out the documentation for changing tunables: http://docs.ceph.com/docs/mimic/rados/operations/crush-map/#tunables 2018-06-20 18:27 GMT+02:00 Oliver Schulz <oliver.schulz@xxxxxxxxxxxxxx <mailto:oliver.schulz@xxxxxxxxxxxxxx>>: Thanks, Paul - I could probably activate the Jewel tunables profile without losing too many clients - most are running at least kernel 4.2, I think. I'll go hunting for older clients ... After changing the tunables, do I need to restart any Ceph daemons? Another question, if I may: The hammer tunables bring CRUSH_V4 with straw2 buckets. Can I / should I convert the existing buckets to straw2 somehow? Or will it happen automatically? Cheers, Oliver
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