Cockroach Labs Estate economics What idle nodes, provisioned bytes and peak-sized bills cost, worked out from your estate.
  1. Nodes 3 baseline
  2. Avg CPU utilization 15.0% idle hardware
  3. Storage provisioned 60 GB 10 GB of data
  4. Est. monthly saving 0%

Step 2 of 8 - Virtualization

A runaway query that only affects one tenant

Tenant B fires a runaway query. Tenant A is the neighbour.

Fire the runaway query simulation

Without Cluster Virtualization

0100200p99 msB 6 msA 6 msTenant p99 latencyTenant A's p99 latency is 6 ms with a 0.0% error rate. Tenant B, which fired the runaway query, is at 6 ms. Illustrative, not measured.
  • Tenant A, the neighbour
  • Tenant B, running the query
Tenant A p99
6.4 ms
Tenant A errors
0.0%
Tenant B p99
6.1 ms

With Cluster Virtualization

0100200p99 msB 6 msA 6 msTenant p99 latencyTenant A's p99 latency is 6 ms with a 0.0% error rate. Tenant B, which fired the runaway query, is at 6 ms. Illustrative, not measured.
  • Tenant A, the neighbour
  • Tenant B, running the query
Tenant A p99
5.6 ms
Tenant A errors
0.0%
Tenant B p99
5.9 ms

Tenant B's virtual cluster throttled.

Read these charts as a table
Model Quiet p99 Peak p99 Times worse Peak errors
Shared cluster: tenant A 6.0 ms 6.4 ms 1.1x 0.0%
Shared cluster: tenant B 6.0 ms 6.1 ms 1.0x 0.0%
Private Host Cluster: tenant A 6.0 ms 5.6 ms 0.9x 0.0%
Private Host Cluster: tenant B 6.0 ms 5.9 ms 1.0x 0.0%

Illustrative, not measured.

Throttle a runaway virtual cluster

September Preview

Virtual cluster receives (and is limited to) a portion of the Private Host Cluster's total available vCPU.

Fair-share vCPU is not a p99 guarantee.

Virtual cluster prioritization

Roadmap

At launch, all virtual clusters receive a fair share of the Private Host Cluster's vCPU. This will allow certain virtual clusters to be prioritized over others.