Signals Image Artist: Recommended nofile (open file descriptor) limits

Image Artist Host Requirements

Required Setting: nofile 65535

The Image Artist host uses logcli to query and collect logs from the Loki service. Proper file descriptor limits ensure:

• Efficient log retrieval without interruption
• Complete log collection without truncation
• Reliable logcli query execution

Configuration: Set this limit for either:

• The Linux user account used when executing the log collection script
• All user accounts (system-wide setting)

External Slurm Cluster Requirements

Required Setting: nofile 65535

When using Batch Analysis with an external Slurm cluster, all worker nodes must have adequate file descriptor limits to:

• Handle multiple concurrent file operations
• Maintain stable connections during job execution
• Process large datasets efficiently

Configuration: Set this limit on all worker nodes for either:

• The Linux user account used by SImA for Slurm job submissions
• All user accounts (system-wide setting)

How to Verify Current Limits

# Check current limit for your session
ulimit -n

How to Set Limits

# Introduce /etc/security/limits.d/sima.conf

# Add these lines (replace 'username' with actual user or * for all):
username soft nofile 65535
username hard nofile 65535

# Reboot or re-login