topic Re: SFCod and SFMoD (ONTAP) in ONTAP Discussions

SFCod and SFMoD (ONTAP)

chamfer — Wed, 04 Jun 2025 09:46:47 GMT

Hi All,

I am trying to find out the mechanics and when the features SFCoD (Single File Copy on Demand) and SFMoD (Single File Migrate on Demand).

My question is related to SnapMirror Synchronous (SM-S) not supporting SFCoD and SFMoD (among others).

All I could find is US Patent US9400802B2, which discusses SFMoD.

Does anyone have anything they are willing to share?

Re: SFCod and SFMoD (ONTAP)

paul_stejskal — Wed, 26 Jul 2023 13:08:53 GMT

I have no information on that. You might ask your account representative and they can check with the program manager.

Re: SFCod and SFMoD (ONTAP)

jaikumar — Wed, 26 Jul 2023 14:01:12 GMT

single file copy on demand and lun /file clone are one and the same. so you can do a lun clone or file clone using volume file clone command and this is supported with sync snapmirror both strict sync and relaxed sync.

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for single file move on demand (lun move) and lun move is not supported in Sync SM. And neither it is supported in SM-BC.

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One of the alternative without a need to create a new volume and sm relationship, will be to break the relationship (snapmirror delete and release with -relationship-info-only) , which is non disruptive operation and then move the lun to the volume and then re-initialize the SM-S relationship.
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Re: SFCod and SFMoD (ONTAP)

chamfer — Tue, 01 Aug 2023 23:29:54 GMT

Thanks jaikumar for the details.