I have 3 nodes and RF=3. I tried to repair every node in the cluster by using "nodetool repair mykeyspace mycf" on every column family. it finished within 3 hours, the data size is no more than 50GB. after the repair, I have tried using nodetool repair immediately to repair the entire node, but 48 hours has past it still going on. "compactionstats" shows it is doing "SSTable rebuild".
so I am frustrating about why does "nodetool repair" so slow? how does it different with repair every CF? I didn't tried to repair the system keyspace, does it also need to repair? thanks!
