On 6.12.19 14:57, Jochen Schulz wrote:
Hi!
Thank you! The output of both commands are below. I still dont understand why there are 21T used data (because 5.5T*3 = 16.5T != 21T) and why there seems to be only 4.5 T MAX AVAIL, but the osd output tells we have 25T free space.
As I know MAX AVAIL is calculated with respect to mon_osd_full_ratio, max OSD %USE, WEIGHT, total weight of set of OSDs in pool and replication factor of pool. Max used hdd OSD is 34. So (0.95 - 0.65) * 931 / 3 * 1.3 ~= 4.5T 1.3 here state for avg osd size / 931 (you have 13*1.8T osd and other 24*931G) The logic behind is to estimate amount of data you can write into pool before max used OSD became full. Sorry, can't say anything precise about 82% and backfill_toofull pg while max used OSD is 65% used.