I was going through benchmark documentation page of Redis and Etcd. From the benchmark data it seems Etcd is as efficient as Redis.
https://redis.io/topics/benchmarks
https://github.com/etcd-io/etcd/blob/master/Documentation/op-guide/performance.md#benchmarks
Example - Setting a 100k keys by 100 parallel clients with payload - 256 byte
- on redis : 70K QPS
- on Etcd : 50k QPS
But I am not able to understand how come Etcd is as efficient as Redis or is there anything wrong in my understanding?
Reason for Etcd should have been much slower than Redis:
- Etcd might be making use of SSD but still Redis is in-memory DB, so should have been much high performant.
- Etcd provide strong consistency using consensus(Raft) and should have been slower than Redis. As Redis doesn't guarantee consistency.