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Troubleshooting file access issues - Amazon File Cache
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Troubleshooting file access issues

There are a number of potential causes for being unable to access files.

Cannot see files on the cache

You mounted your cache, but you don't see any files.

Action to take

Ensure that you’re running a supported Lustre client and that the Linux instance you’re using to access the cache has a Linux kernel version that meets the minimum requirement for your client operating system. For more information, see Installing the Lustre client.

Cannot read files in linked NFS file system

You can successfully create a cache linked to your NFS file system, but you get an error when you try to read a file on it.

Action to take

If this issue occurs, do the following:

  1. Ensure that your setup complies with the Prerequisites for linking to on-premises NFS data repositories.

    Note

    While Amazon File Cache supports NFSv3 file systems with most NFSv3 export policies, you must not use the NFS export option all_squash.

  2. Are all of the file servers and metadata servers in the cache able to reach your linked NFS file system?

    In order for Amazon File Cache to be able to access data in your NFS file system, all of the File Cache network interfaces must be able to communicate with your NFS file system. If you have a network firewall or IP allow-list, ensure that it includes all of the cache IP addresses and allows traffic on the ports that File Cache requires to be open. For more information, see Cache access control with Amazon VPC.

    You can see all of your cache IP addresses by going to the Amazon EC2 console, go to Network Interfaces in the left-side menu under Network & Security, and filter by Cache ID.

    Alternatively, you can use the AWS CLI and type the following command:

    aws ec2 describe-network-interfaces --filters Name=description,Values=*fc-0123456789abcdef0

    For Values in the --filters option, be sure to replace the sample cache ID in the command with your cache ID.

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