Improving read performance

Steps to increase DSE Search read performance.

You can increase DSE Search read performance by increasing the number of replicas. You define a strategy class, the names of datacenters, and the number of replicas. For example, you can add replicas using the NetworkToplogyStrategy replica placement strategy.

Procedure

For example, if you are using a PropertyFileSnitch, perform these steps:
  1. Examine your datacenter and nodes. The following example shows two datacenters with one node in each datacenter, which is a suboptimal configuration. 
    nodetool -h localhost ring
    Datacenter: DC1
==========
Address          Rack        Status State   Load            Owns                Token                                       

145.101.134.121  rack1       Up     Normal  160.54 KiB      100.00%             -9223372036854775808

Datacenter: DC2
==========
Address          Rack        Status State   Load            Owns                Token                                       

145.101.134.122  rack1       Up     Normal  160.54 KiB      100.00%             -9223372036854775808
    The datacenter names, DC1 and DC2 in this example, must match the datacenter name configured for your snitch.
  2. Start CQL on the command line and create a keyspace that specifies the number of replicas.
    To improve read performance, increase the number of replicas in the datacenters. For example, at least three replicas in DC1 and three in DC2.