NetApp 7-Mode to Isilon migration

[Paul Letta]

Hello -- Does anyone have any recommendations for professional services to do a NetApp to a new Isilon migration?   I'm especially after experience with copying NTFS ACL from the source to the Isilon.  

We have moved this dataset from Netapp to Netapp for over 20 years now.  We've got NTFS as well as Unix style permission directories all mixed up under a couple of top level directories.

Thanks.

Paul

[Alistair Stewart]

This is going to be a fun migration. As you probably know, NetApp has two sets of unrelated permissions for files shared via NFS and SMB. Isilon has only one set of permissions for each file and that can be POSIX or an ACL. A file with an ACL shared via NFS v3 will present an approximated set of POSIX permissions, but when a user attempts to access that file, their credentials will be checked against the full ACL. With POSIX permission files accessed via SMB you will see an ACL that matches the POSIX permissions.

So, for your migration you are going to have to choose to migrate either the ACL or the POSIX permissions, you cannot add both. The advantage is that users have exactly the same access rights to a file regardless of their access protocol.

Hopefully, you'll find that most files are either accessed via NFS or via SMB, not both, so it will be easy to decide which set of credentials to migrate for each dataset.

Good luck, and welcome to the future.

Al...

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[bob flynn]

We have used datadobi to migrate

3rd party storage -> Isilon

EMC Unity -> Isilon

https://www.dell.com/community/Isilon/what-do-you-recommend-when-migrating-NetApp-to-isilon-is-there-a/td-p/7176167 talks about this re netapp.

The main advantage is it does a rolling background sync so cutover is fairly fast and you have validation points prior to migration date. It  reads unix permissions and the reads windows permissions on source and then applies to destination on isilon.

As despite it being a dedicated tool, all migrations tend to be bespoke, I would recommend EMC professional services are engaged and seek their opinion.

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[Dan Pritts]

Don't know a consultant, but  if you search the list archives I believe you'll find a robocopy script that I posted that should help a lot.  As a *nix guy I was pleasantly surprised by robocopy; it was good stuff.  I was coming from a Celerra but everything I did was on Linux & Windows hosts.

There used to be something called EMCopy or EMCcopy that was similar.  It had some bugs that sent me to robocopy but it is worth a look.  

This doesn't solve the problem of knowing when to sync mode bits and when to sync NTFS, but if you can segregate them robocopy can handle the acls and rsync can handle the mode bits.  Pretty sure that both robocopy and rsync can sync permissions only, so you could copy all the data with one tool then run the other tool to fix up permissions as needed.  

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Dan Pritts

ICPSR Computing & Network Services

University of Michigan 

[bob flynn]

just to confirm emcopy is a tool emc created with is a bespoke version of robocopy but tweaked for performance. Its was used ( probably still used ) by EMC professional services for migrations. We used it for a netapp to EMC cx480 ( showing age ! an old celerra ). Worked fine because we could migrate all data as a full copy rather than a rsync diff refresh on a single weekend. If migrating more data, being able to provide a status report of migration readiness and using diff refreshes would be what I would go for. 

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