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The "NodeTool" page has been changed by DavidAllsopp: http://wiki.apache.org/cassandra/NodeTool?action=diff&rev1=16&rev2=17 == Flush == Flushes memtables (in memory) to SSTables (on disk), which also enables CommitLog segments to be deleted. + == Removetoken== + Removes a dead node from the ring - this command is issued to any other live node (since clearly the dead node cannot respond!). + == Scrub == Cassandra v0.7.1 and v0.7.2 shipped with a bug that caused incorrect row-level bloom filters to be generated when compacting sstables generated with earlier versions. This would manifest in IOExceptions during column name-based queries. v0.7.3 provides "nodetool scrub" to rebuild sstables with correct bloom filters, with no data lost. (If your cluster was never on 0.7.0 or earlier, you don't have to worry about this.) Note that nodetool scrub will snapshot your data files before rebuilding, just in case.
