Solved: SFCod and SFMoD (ONTAP)

chamfer · ‎2023-07-25

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?

jaikumar · ‎2023-07-26

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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paul_stejskal · ‎2023-07-26

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

jaikumar · ‎2023-07-26

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.

---

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.

---

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.
---

chamfer · ‎2023-08-01

Thanks jaikumar for the details.