In which cases can the "mon_osd_full_ratio" and the "mon_osd_backfillfull_ratio" be exceeded ?

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Hello,

In which cases can the "mon_osd_full_ratio" and the "mon_osd_backfillfull_ratio" be exceeded ?

More specifically, in case a subset of OSDs fail, if there isn't any more space left in the remaining OSDs to migrate the PGs of the failed OSDs without exceeding either the "mon_osd_full_ratio" or the "mon_osd_backfillfull_ratio of at least one OSD, how will the cluster behave ? Will it exceed the "mon_osd_full_ratio" or the "mon_osd_backfillfull_ratio" of one or more OSDs to ensure an "active+clean" state ?

Best regards,

Raphaël
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