Cassandra configuration¶
This section describes the Cassandra configuration through the Tungsten Fabric Operator custom resource.
Cassandra resource limits configuration¶
By default, Tungsten Fabric Operator sets up the following resource limits for Cassandra analytics and configuration StatefulSets:
Limits:
cpu: 8
memory: 32Gi
Requests:
cpu: 1
memory: 16Gi
This is a verified configuration suitable for most cases. However, if nodes
are under a heavy load, the KubeContainerCPUThrottlingHigh
StackLight alert
may raise for Tungsten Fabric Pods of the tf-cassandra-analytics
and
tf-cassandra-config
StatefulSets. If such alerts appear constantly, you can
increase the limits through the TFOperator
CR. For example:
spec:
controllers:
cassandra:
deployments:
- name: tf-cassandra-config
resources:
limits:
cpu: "12"
memory: 32Gi
requests:
cpu: "2"
memory: 16Gi
- name: tf-cassandra-analytics
resources:
limits:
cpu: "12"
memory: 32Gi
requests:
cpu: "2"
memory: 16Gi
Custom configuration¶
To specify custom configurations for Cassandra clusters, use the
configOptions
settings in the TFOperator
CR. For example, you may need
to increase the file cache size in case of a heavy load on the nodes labeled
with tfanalyticsdb=enabled
or tfconfigdb=enabled
:
spec:
controllers:
cassandra:
deployments:
- name: tf-cassandra-analytics
configOptions:
file_cache_size_in_mb: 1024