Hi,

We are looking at providing an AFM cache of a home which has a number of cloned 
files. From the docs:
https://www.ibm.com/support/knowledgecenter/en/STXKQY_5.0.0/com.ibm.spectrum.scale.v5r00.doc/bl1ins_afmandafmdrlimitations.htm

·         We can see that “The mmclone command is not supported on AFM cache 
and AFM DR primary filesets. Clones created at home for AFM filesets are 
treated as separate files in the cache.”

So it’s no surprise that when we pre-cache the files, they space consumed is 
different.

What I’m not clear on is what happens if we update a clone file at home? I know 
AFM is supposed to only transfer the exact bytes updated, does this work with 
clones? i.e. at home do we just get the bytes updated in the copy-on-write 
clone, or do we accidentally end up shipping the whole file back?

(note we are using IW mode)

Thanks

Simon
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