On Fri, Sep 9, 2011 at 4:18 AM, Yan Chunlu <springri...@gmail.com> wrote: > 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?
What version of Cassandra are you using. If you are using something < 0.8.2, then it may be because "nodetool repair" used to schedule its sub-task poorly, in ways that were counter-productive (fixed by CASSANDRA-2816). If you are using a more recent version, then it's an interesting report. > I didn't tried to repair the system keyspace, does it also need to repair? It doesn't. -- Sylvain
