To view the ETL files, open all the folders one by one. What is BootCKCL.etl file and can I delete it? The BootCKCL.etl is one of the CKCL files. CKCL stands for Circular Kernel Context Logger.

The free, open-source Talend Open Studio makes it easy to round up data, tweak it en masse, and load it into target systems such as databases and enterprise applications.