title: High Performance DB for Fast Read and Fast Write. No Update or Delete
body: <p>I am looking for the database/mechanism to store the data where I can write the data and read the data with high performance.</p>
  
  <p>This storage is used to for storing the Logging like important information across multiple systems. <code>Since it's critical data which will be logged, read performance should be pretty fast as these data will be used to show history. Since we never do update on them/delete on them/or do any kinda joins, I am looking for right solution.</code> Probably we might archive the data in long time but that's something ok to deal with.</p>
  
  <p>I tried looking at different sources to understand different NoSql databases, experts opinion is always better :)</p>
  
  <pre><code>Must Have:
  1. Fast Read without fail
  2. Fast Write without fail
  3. Random access Performance
  4. Replication kinda feature, one goes down, immediately another should be up and working
  5. Concurrent write/read data
  
  Good to Have:
  1. Search content like analysing the data for auditing with/without Indexes
  
  Don't required:
  1. Transactions are not required at all
  2. Update never happens
  3. Delete never happens
  4. Joins are not required
  </code></pre>
  
  <p>Referred: <a href="http://kkovacs.eu/cassandra-vs-mongodb-vs-couchdb-vs-redis" rel="noreferrer">http://kkovacs.eu/cassandra-vs-mongodb-vs-couchdb-vs-redis</a></p>