title: uneven data size on cassandra nodes
body: <p>I am struggling to understand why my Cassandra nodes have uneven data size.</p>
  
  <p>I have a cluster of three nodes. According to <code>nodetool ring</code>, each node owns 33.33%. Still disk space usages are uneven.</p>
  
  <pre><code>Node1: 4.7 GB (DC: logg_2, RAC: RAC1)
  Node2: 13.9 GB (DC: logg_2, RAC:RAC2)
  Node3: 9.3 GB (DC: logg_2, RAC:RAC1)
  </code></pre>
  
  <p>There is only one keysapce.</p>
  
  <pre><code>keyspace_definition: |
   CREATE KEYSPACE stresscql_cass_logg WITH replication = { 'class': 'NetworkTopologyStrategy', 'logg_2' : 2, 'logg_1' : 1};
  </code></pre>
  
  <p>And there is only one table named <code>blogposts</code>.</p>
  
  <pre><code>table_definition: |
    CREATE TABLE blogposts (
          domain text,
          published_date timeuuid,
          url text,
          author text,
          title text,
          body text,
          PRIMARY KEY(domain, published_date)
    ) WITH CLUSTERING ORDER BY (published_date DESC)
      AND compaction = { 'class':'LeveledCompactionStrategy' }
      AND comment='A table to hold blog posts'
  </code></pre>
  
  <p>Please help me to understand it why each node has uneven datasize.</p>