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 custom resource. For example:
spec:
services:
analytics:
enabled: true
cassandra:
resources:
limits:
cpu: "12"
memory: 32Gi
requests:
cpu: "2"
memory: 16Gi
config:
cassandra:
resources:
limits:
cpu: "12"
memory: 32Gi
requests:
cpu: "2"
memory: 16Gi
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 custom resource.
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:
services:
analytics:
enabled: true
cassandra:
configOptions:
file_cache_size_in_mb: 1024
spec:
controllers:
cassandra:
deployments:
- name: tf-cassandra-analytics
configOptions:
file_cache_size_in_mb: 1024