[linux-lvm] Some questions on "Mirrors cannot be resized while active yet"

Jun'ichi Nomura j-nomura at ce.jp.nec.com
Mon Aug 13 18:10:46 UTC 2007

Jonathan Brassow wrote:
> I don't remember all the reasons, but I *think* two of them were:
> 1) 186304 - potential to spoil redundancy
> 2) cluster mirroring needed ability to hold to identical logs for a
> short period

Maybe not a reason why it's disabled, but I think kernel code
needs to change to allow LVM mirror resizing.

LVM2 uses 'noflush' option for suspending mirror maps.

OTOH, currently you need full (flushing) suspend to resize device.

Jun'ichi Nomura, NEC Corporation of America

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