CODEWITHSUNDEEP
cassandracpuplane
Dennis
Dennis

Reputation: 23

How to plan cassandra capacity planning for 1 host?

for EX: 5 user (who read or update data in Casandra) per second. How much RAM and CPU should be increased in theory?

Upvotes: 0

Views: 131

Answers (1)

Erick Ramirez
Erick Ramirez

Reputation: 16293

In production, our general recommendations are:

  • a minimum of 3 nodes in each DC (even for a single-DC cluster)
  • a replication factor of 3 for app keyspaces in each DC
  • use LOCAL_QUORUM for both reads and writes

3 nodes with a replication factor of 3 can tolerate 1 out of 3 nodes going down for reads and writes with a consistency of LOCAL_QUORUM.

From a hardware perspective, we recommend a minimum of:

  • 4 cores
  • 16GB of RAM
  • allocate 8GB to heap using CMS GC

For moderate workloads, 8 cores + 24GB RAM + allocate 16GB to heap. For heavy workloads, 16 core + minimum 32GB RAM + allocate 24-31GB to heap using G1 GC. Cheers!

Upvotes: 1

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