FAQ

What S3 permissions are recommended to mount a bucket with Object Mount?

Short answer, for a generic cloud: read, write, and list permissions for the bucket intended to be mounted.

Are full permissions required to achieve maximum performance of Object Mount?

The maximum performance comes from Object Mount’s ability to prefetch data based on how it handle certain file types. It is not dependent on being able to write the POSIX-metadata file. With read-only permissions to a bucket, Object Mount will still achieve maximum performance — but it will not be able to update any POSIX-related metadata associated with the original files.

Why don’t read-only credentials work when POSIX is enabled in Object Mount?

The POSIX mode needs to write a hidden file at the root of the bucket that tracks all the POSIX permissions, etc. This is why the read-only use case works so long as you mount the bucket without POSIX enabled.

How can I mount all buckets with Object Mount?

In order for Object Mount to “see” the buckets to be mounted when adding new credentials into Object Mount, the AWS equivalent of ListAllMyBuckets is required. In the absence of ListAllMyBuckets, you can specify what bucket to mount by manually pairing the bucket.

Where can I find the Object Mount logs?

For Windows, logs are available at C:\Users\%username%\AppData\Local\Object Mount\cunofs.log.

For macOS the logs are located at /Users/$USER/Library/Application Support/Object Mount/cunoFS.log.

The default logging level is “error”, so changing this to “access” or “trace” will provide more verbose logs to better understand what is going on.

Where are the configs and license files located?

For Windows:

• License key information is located along side the logs: C:\Users\%username%\AppData\Local\Object Mount\license.
• The config.json file is in the same directory where the mount/bucket information is kept

For macOS:

• License key information is located along side the logs: /Users/$USER/Library/Application Support/Object Mount/license.
• The config.json file is in the same directory where the mount/bucket information is kept

I have multiple Mounts added but I can pnly activate one at a time?

• Object Mount for both Windows and Mac can only have one active mount at a time.
• Activating a second mount, will automatically de-activate the previously active mount.