Re: Why side-effects on open(2) are evil. (was Re: [RFD w/info-PATCH]device arguments from lookup)

Oliver Xymoron
2001-05-21T17:21:29Z

On Sat, 19 May 2001, Jeff Garzik wrote:

> Why are LVM and EVMS(competing LVM project) needed at all?
>
> Surely the same can be accomplished with
> * md
> * snapshot blkdev (attached in previous e-mail)
> * giving partitions and blkdevs the ability to grow and shrink
> * giving filesystems the ability to grow and shrink

You can migrate data off disks while the filesystems on top of them are
live. Add disk b, migrate a->b, remove disk a. Perhaps this is intrinsic
in the above somehow but I don't see it.

--
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