# Clean-up-CMS-log-files_686073699
You may find that the size of logs on your file storage, especially the <cms-log-volume> folder, keeps growing. For example, the size of the <cms-log-volume> folder may reach 120 GB after CMS has been running for a few months. To reduce the log size, you can safely remove or archive old log files in the log folders while the CMS is running.

### How to delete log files from a log folder

You can delete log files that are older than certain days ( for example, 60 days) from your file storage. To do this, run the following command on the file storage server:

nohup find {log folder} -type f -atime +{day} -mtime +{day} -ctime +{day} -exec stat '{}' \\+, -type f -atime +{day} -mtime +{day} -ctime +{day} -exec rm -f '{}' \\+ > {output.log} &

Where:

- {log folder}: is the folder from which you want to delete the log files that meet the specified condition
- {day}: specify the same value (in days) for the atime, mtime, and ctime parameters:
	- **mtime**: modification time, the time when the file was last modified. When the content of a file changes, its mtime changes.
		- **ctime**: change time, the time when the file's property changes. It always changes when the mtime changes, and also changes when the file's permissions, name or location changes.
		- **atime**: access time, which is updated when the file is read by an application or a command such as grep or cat
- {output.log} is the log file to which you want to write the output log message

Log folders to clean up

Normally, you only need to clean up the following log folders on the NFS server:

| **Log folder** | **Example 1** | **Example 2** | **Note** |
| --- | --- | --- | --- |
| <cms-log-volume>/logs | /var/vols/itom/cms/log\_volume | /mnt/cms/var/vols/itom/cms/log\_volume | <cms-log-volume> is the CMS log NFS volume |

The following example commands will delete all the files in the specified folders when all of their atime, mtime, and ctime values are older than 60 days.

**nohup find /mnt/cms/var/vols/itom/cms/log\_volume -type f -atime +60 -mtime +60 -ctime +60 -exec stat '{}' \\+, -type f -atime +60 -mtime +60 -ctime +60 -exec rm -f '{}' \\+ > /tmp/cleanupCMS.log &**

Note:if you meet 'permission deny' error when running the command, you can add sudo:

**nohup find /mnt/cms/var/vols/itom/cms/log\_volume -type f -atime +60 -mtime +60 -ctime +60 -exec stat '{}' \\+, -type f -atime +60 -mtime +60 -ctime +60 -exec sudo rm -f '{}' \\+ > /tmp/cleanupCMS.log &**
