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s-sajid-ali merged 1 commit into from
Dec 19, 2025
Merged

nfsv4 aces/acls file rename and minor edit #249

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2 changes: 1 addition & 1 deletion docs/cloud/04_dataproc/02_data_management.md
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Expand Up @@ -4,7 +4,7 @@ HDFS stands for Hadoop Distributed File System. HDFS is a highly fault-tolerant

### File Permissions and Access Control Lists

You can share files with others using [access control lists (ACLs)](../../hpc/03_storage/08_sharing_data_on_hpc.md). An ACL gives you per-file, per-directory and per-user control over who has permission to access files. You can see the ACL for a file or directory with the getfacl command:
You can share files with others using [access control lists (ACLs)](../../hpc/03_storage/08_sharing_data_on_hpc.mdx). An ACL gives you per-file, per-directory and per-user control over who has permission to access files. You can see the ACL for a file or directory with the getfacl command:
```sh
hdfs dfs -getfacl /user/<net_id>_nyu_edu/testdir
```
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6 changes: 4 additions & 2 deletions .../hpc/03_storage/08_sharing_data_on_hpc.md → ...hpc/03_storage/08_sharing_data_on_hpc.mdx
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@@ -1,8 +1,10 @@
# Sharing Data on HPC

## Introduction
To share files on the cluster with other users, we recommend using NFSv4 Access Control Lists (ACL) for a user to share access to their data with others. NFSv4 ACL mechanism allows for fine-grained control access to any files by any users or groups of users. We discourage users from setting `777` permissions with `chmod`, because this can lead to data loss (by a malicious user or unintentionally, by accident).

To share files on the cluster with other users, we recommend using NFSv4 Access Control Lists (ACL) for a user to share access to their data with others. NFSv4 ACL mechanism allows for fine-grained control access to any files by any users or groups of users.
:::warning
We discourage users from setting `777` permissions with `chmod`, because this can lead to data loss (by a malicious user or unintentionally, by accident).
:::
:::info
Torch supports NFSv4 ACLs rather than the POSIX ACLs supported by Greene! NFSv4 ACLs allow for more fine grained control when compared to POSIX ACLs.
:::
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