Administrator Guide

using the CLI. See the Dell FluidFS Version 5.0 FS8600 Appliance CLI Reference Guide for detailed information about global
namespace commands.
Global Namespace Limitations
• Global namespace is supported on SMB2.x, SMB3.x, and NFSv4.x clients only.
• Global namespace cannot be congured on these volumes:
– NAS volume that reached full capacity
– Replication destination NAS volume (or by any other read-only NAS volume)
• NFSv4 redirection targets support NFSv4 protocol (the remote NAS server supports NFSv4, enabling NFSv4 redirections).
• SMB shares cannot be dened on the redirection folder directly. An SMB share is dened on a local folder that contains the
redirection folder. The redirection folder cannot be dened on SMB shared folder (even when empty).
• Redirection folders cannot be set on non-empty directories.
• NAS virtual volume backup, restore, replication, and snapshots operations are not supported on the remote target data. It is
supported only on the redirection folders (including the redirection data information) that reside inside the local volume data.
• After the NFSv4 or SMB client is redirected to the remote server and establishes the remote connection, the client continues
further communication with the remote server.
Additional Documentation
For more information about conguring namespace aggregation, see:
• http://en.community.dell.com/techcenter/extras/m/white_papers/20442194
• http://en.community.dell.com/techcenter/extras/m/white_papers/20442085
Using FTP
File Transfer Protocol (FTP) is used to exchange les between computer accounts, transfer les between an account and a desktop
computer, or to access online software archives. FTP is disabled by default. Administrators can enable or disable FTP support, and
specify the landing directory (volume, path) on a per-system basis.
FTP user access to a le is dened by le permissions. FTP anonymous users are treated as nobody. Access permission is denied or
granted, depending on the le’s ACLs or UNIX access mode. FTP access respects and interoperates with SMB/NFS le permissions:
ACLs, NFSv4 ACLs, UNIX word, SID owner, and UID ownership. FTP access to a le also considers SMB/NFSv4 open le state and
byte-range locks. It breaks oplocks when needed.
FTP User Authentication
FTP users can authenticate using anonymous access (if allowed by the FTP site). When authenticated using a user name and
password, the connection is encrypted. Anonymous users authenticate using anonymous as the user name and a valid email
address as the password.
FTP Limitations
• The number of concurrent FTP sessions is limited to 800 sessions per NAS Appliance.
• Idle FTP connections time out and close after 900 seconds (15 minutes).
• The FTP client does not follow symbolic links, NFS referrals, or SMB wide-links.
• FTP changes in directory structure (create new le, delete, rename) trigger SMB change notications.
• FTP access triggers le-access notication events (the File Access Notication feature).
• FTP presents the underlying le system as case sensitive.
• File-name limitations:
– File names are case sensitive.
– File names cannot be longer than 255 characters.
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FluidFS NAS Volumes, Shares, and Exports