Re: osd up_from, up_thru

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On Sun, Mar 6, 2016 at 10:56 PM, min fang <louisfang2013@xxxxxxxxx> wrote:
> Dear,  I used osd dump to extract osd monmap, and found up_from, up_thru
> list, what is the difference between up_from and up_thru?
>
> osd.0 up   in  weight 1 up_from 673 up_thru 673 down_at 670
> last_clean_interval [637,669)

up_from is when the OSD first became active, after being inactive.
up_thru is the last epoch we bothered to write down that it was
active. Both of these are important for PG peering but aren't of much
use otherwise.
-Greg
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