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Re: [dm-devel] REQUEST for new 'topology' metrics to be moved out of the 'queue' sysfs directory.

>>>>> "John" == John Robinson <john robinson anonymous org uk> writes:

John> Even sadder, when a raid 0/4/5/6 is reshaped over more discs (and
John> probably other scenarios outwith md),

I'm not sure I agree with the whole "sad" sentiment.  Just because
ext[234] doesn't query devices automatically doesn't mean the technology
doesn't exist.  I wrote the MD/LVM extraction code for XFS in 2001.

John> both stripe-width and stride-size change. Is there any prospect
John> this new stacking could give us the opportunity to tell our client
John> (LVM, filesystem, whatever) about the change, or that they'll be
John> able to take advantage of it?

When you resize the fs it would have to compare the new topology to the
old one and adjust accordingly.

Martin K. Petersen	Oracle Linux Engineering

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