What is the impact of PVE hard disk wearout 100%?
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Wearout is what manufacterer set it to be. So usually just a warning that your drive can die any minute, not that it will.
This reading is what is being read by S.M.A.R.T. data from the NVMe itself - it is not a PVE metric & as pointed out - its manufacture dependent.
Most S.M.A.R.T data is usually only useful when looking at it in a relative fashion. So in your case - only you know what you have been doing with the drive & its history. When did this "number" reach 100? How long did it take to get there? At what rate etc. ? This may (or may not) give you an idea of what's actually going on with the drive & how critical is a replacement. In my book - if in doubt replace it.
Most S.M.A.R.T data is usually only useful when looking at it in a relative fashion. So in your case - only you know what you have been doing with the drive & its history. When did this "number" reach 100? How long did it take to get there? At what rate etc. ? This may (or may not) give you an idea of what's actually going on with the drive & how critical is a replacement. In my book - if in doubt replace it.
Will wearing out 100% affect the latency of ceph-osd?
Recently, the latency of ceph-osd has been found to be high and low, sometimes even slower than hdd
It's also possible that the drive is new and the manufacturer count backwards from 100%to 0.
It's a QLC drive, so it will wear quickly and be slow(er than HDD's) often because it cannot handle prolonged sustained writes.
Kingston or crucial are really a drive for gaming and office, not for enterprise.
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Your Kingston SNVS/1000G based on docs has a 3 year warranty at 240 TBW, that works out to about 0.22 DWPD. I hope you're not using that in an enterprise situation.