title: How to understand bloom_filter_fp_chance and read_repair_chance in Cassandra
body: <p><strong>Bloom Filters</strong> </p>
  
  <pre><code>When data is requested, the Bloom filter checks if the row exists before doing disk I/O. 
  </code></pre>
  
  <p><strong>Read Repair</strong></p>
  
  <pre><code>Read Repair perform a digest query on all replicas for that key
  </code></pre>
  
  <p>My confusion is how to set this value between 0 to 1,. What happens when the value varies?</p>
  
  <p>Thanks in advance,.</p>