# Amazon ParallelCluster configured log rotation The Amazon ParallelCluster log rotation configurations are located in `/etc/logrotate.d/parallelcluster_*_log_rotation` files. When a configured log rotates, the current log content is preserved in a single backup and the emptied log resumes logging. Only 1 backup is maintained for each configured log. Amazon ParallelCluster configures a fast-growing log to rotate when it reaches 50 MB in size. Fast-growing logs are related to scaling and Slurm, including `/var/log/parallelcluster/clustermgtd`, `/var/log/parallelcluster/slurm_resume.log`, and `/var/log/slurmctld.log`. Amazon ParallelCluster configures a slow-growing log to rotate when it reaches 10 MB in size. You can view earlier logs that are retained for the number of days defined in the cluster configuration [`Logs`](Monitoring-v3.md#yaml-Monitoring-Logs) / [`CloudWatch`](Monitoring-v3.md#yaml-Monitoring-Logs-CloudWatch) / [`RetentionInDays`](Monitoring-v3.md#yaml-Monitoring-Logs-CloudWatch-RetentionInDays) setting with CloudFormation logging enabled. Check the `RetentionInDays` settings to see if the number of days needs to be increased for your use case. Amazon ParallelCluster configures and rotates the following logs: **Head node logs** ``` /var/log/cloud-init.log /var/log/supervisord.log /var/log/cfn-init.log /var/log/chef-client.log /var/log/dcv/server.log /var/log/dcv/sessionlauncher.log /var/log/dcv/agent.*.log /var/log/dcv/dcv-xsession.*.log /var/log/dcv/Xdcv.*.log /var/log/parallelcluster/pam_ssh_key_generator.log /var/log/parallelcluster/clustermgtd /var/log/parallelcluster/clusterstatusmgtd /var/log/parallelcluster/slurm_fleet_status_manager.log /var/log/parallelcluster/slurm_resume.log /var/log/parallelcluster/slurm_suspend.log /var/log/slurmctld.log /var/log/slurmdbd.log /var/log/parallelcluster/compute_console_output.log ``` **Compute node logs** ``` /var/log/cloud-init.log /var/log/supervisord.log /var/log/cloud-init-output.log /var/log/parallelcluster/computemgtd /var/log/slurmd.log ``` **Login node logs** ``` /var/log/cloud-init.log /var/log/cloud-init.log /var/log/cloud-init-output.log /var/log/supervisord.log /var/log/parallelcluster/pam_ssh_key_generator.log ```