Tzach Livyatan

``` ./ec2-setup-cassandra.sh -e "cluster_nodes=2" -e "cassandra_ver=3.0.13" -e "instance_type=c3.xlarge" -vv ``` ``` TASK [Launch DB server instances] ********************************************************************************************************************************************************************************* task path: /home/tzach/projects/scylladb-cassandra-test-and-deploy/provision-db.yaml:29 failed: [localhost -> localhost] (item={'key': u'region_to_use', 'value': {u'region_name': u'us-east-1', u'ubuntu_image':...

Tune C* for perfromance

1

References https://docs.datastax.com/en/landing_page/doc/landing_page/recommendedSettingsLinux.html https://tobert.github.io/pages/als-cassandra-21-tuning-guide.html

Loaders already support YCSB #113, but the data is not collected and summarize like it is for c-s

Data clean fail

1

data cleaning works as follow: - stop all servers - clean data - start servers one by one The problems is this fails when the first node starting is not...

More c-s process will open more connection and load Scylla better requested by @avikivity

The configuration is confusing and easy to miss. Input from @avikivity

add prometheus-client option to Cassandra

1

https://github.com/scylladb/cassandra-test-and-deploy/pull/87 added a prometheus-client (collectd_exporter) to Scylla It would be useful to have the same for Cassandra

Running ``` ./ec2-setup-loadgen.sh -e "load_nodes=8" -e "instance_type=c4.4xlarge" -e "region_to_use=us-east-1" ``` Take long minutes, might running something sequentially