Almost seamless! Sort of…
As with most of my thoughts, it started with an innocent customer query. EMC have some very cool inbuilt tools for doing seamless CIFS data migration, but NetApp don’t. It’s something that often causes a fair amount of problems and some careful planning with NetApp as we don’t have this. But I was thinking today, we kinda do, I just don’t think we leverage the tools available properly.
Enter widelinks. Here is an excerpt from a NetApp KB article on the topic (KB 3011420)…
A symbolic link is a special file created by NFS clients that points to another file or directory. Widelink entries are a way to redirect absolute symbolic links on the filer. They allow the symbolic link destination to be a share on the same filer or on another filer. The following examples illustrate how to create a symlink from volume to qtree on the same filer, and from volume to volume on different filers.
What does this mean and why will my life be easier after reading the rest of this article?
So if I have a nice shiny new NetApp filer (or an old one I haven’t got round to migrating my CIFS data onto yet), and I have my old CIFS file server that is rapidly approaching failure or out of support. I can create my new file and share structure on my NetApp, and then use widelinks to redirect the user to the CIFS file server while I worry about all the data copy out of hours without having the ball-ache of copying all my data all at once. Read more... (1385 words, 3 images, estimated 5:32 mins reading time)
Command Line, General cifs, NetApp, symbolic links, symlinks, widelinks
Table of Contents
cifs – Common Internet File System (CIFS) Protocol
The filer supports the
CIFS protocol, which is documented in an Internet Engineering Task Force (IETF) InternetDraft specification titled "A Common Internet File System (CIFS/1.0) Protocol.”
CIFS is a file sharing protocol intended to provide an open cross-platform mechanism for client systems to request file services from server systems over a network. it is based on the standard Server Message Block (SMB) protocol widely in use by personal computers and workstations running a wide variety of operating systems.
cifs , cifs_access , cifs_audit , cifs_broadcast , cifs_comment , cifs_help , cifs_lookup , cifs_restart , cifs_sessions ,
- cifs_setup ,
- cifs_shares , cifs_stat , cifs_terminate , cifs_testdc
RFC 1001, RFC 1002
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Table of Contents
cifs – summary of cifs commands
Command Summary This is a list of the subcommands of the cifs command.
- cifs access
- Modifies share-level Access Control List (ACL) entries.
- cifs audit
- Configures CIFS auditing.
- cifs broadcast
- Display a message on user workstations.
cifs changefilerpwd schedules a domain password change for the filer.
- cifs comment
- Displays/modifies the CIFS server description.
- cifs help
- Display a list of CIFS commands.
- cifs homedir
- Manage CIFS home directory paths.
- cifs lookup
- Translates user/group names into SIDs, and vice versa.
- cifs gpresult
- Displays the resultant set of group policy for this filer.
- cifs gpupdate
- Refreshes group policy settings.
- cifs nbalias
- Manage CIFS NetBIOS aliases.
- cifs restart
- Restarts CIFS or reactivates CIFS service for a single volume if either has been shut down with cifs terminate.
- cifs sessions
- Displays current configuration and current connections.
- cifs setup
- Configures CIFS service.
- cifs shares
- Displays/modifies the CIFS exports.
- cifs stat
- Displays operational statistics.
- cifs terminate
- Shuts down CIFS, ends CIFS service for a volume, or logs off a single station.
- cifs testdc
- Tests the filer’s connection to domain controllers.
- cifs adupdate
- Update the filer’s account information on the Active Directory server.
When run from a vfiler context, (e.g. via the
vfiler run command),
cifs operates on the concerned vfiler.
cifs_access , cifs_audit , cifs_broadcast , cifs_comment , cifs_help , cifs_homedir , cifs_lookup , cifs_nbalias , cifs_restart , cifs_sessions , cifs_setup , cifs_shares , cifs_stat , cifs_testdc , cifs_adupdate , cifs_terminate , cifs , vfiler
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