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From Branton Davis <>
Subject Sudden disk usage
Date Sat, 13 Feb 2016 07:48:15 GMT
One of our clusters had a strange thing happen tonight.  It's a 3 node
cluster, running 2.1.10.  The primary keyspace has RF 3, vnodes with 256

This evening, over the course of about 6 hours, disk usage increased from
around 700GB to around 900GB on only one node.  I was at a loss as to what
was happening and, on a whim, decided to run nodetool cleanup on the
instance.  I had no reason to believe that it was necessary, as no nodes
were added or tokens moved (not intentionally, anyhow).  But it immediately
cleared up that extra space.

I'm pretty lost as to what would have happened here.  Any ideas where to


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