I noticed on my nodes while upgrading from 5.1.0 to 5.1.2 that on one node it decided to do a reshape operation (that took a couple hours).
During this I happened to be just df’ing and noticed it used quite a bit of disk shape, roughly double the normal disk space:
/dev/nvme1n1 3661060799 1318457771 2342603028 37% /var/lib/scylla
during reshape, near the end of it:
/dev/nvme1n1 3661060799 2582195011 1078865788 71% /var/lib/scylla
My concern is what would have happened if my node started out at over 50% disk used? Would the reshape be able to complete?
I’m using only LCS compaction strategy, so I thought it would be “safe” to go over 50% disk used, but is that an incorrect assumption?