Jens Axboe wrote:
On Wed, Nov 09 2005, Jeff Garzik wrote:
Neil Brown wrote:
On Wednesday November 9, [email protected] wrote:
Has anybody put any thought towards how a userspace block driver
would work?
Isn't this was enbd does?
http://www.it.uc3m.es/~ptb/nbd/
Is there something there relevant for modern kernels? I would sure hope
I could come up with something more lightweight than that.
I was going to say drbd, but then you did say more lightweight :-)
Is nbd completely screwed these days?
nbd does more than I want.
_All_ that is needed is flipping requests <somehow> to/from userspace.
nbd messes directly with sockets and such, which I don't want. It does
way too much, hardcodes way too much.
loop is a closer model to a generic userspace block device than nbd, I
think.
Though, answering your question directly, I do get the impression that
in-kernel nbd has been left behind in favor of drbd and enbd, out in the
few places where nbd-ish solutions are used.
Jeff
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